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Category

  • Garage Replacement Parts
    • CHAMBERLAIN After 2014
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    • LIFTMASTER 2022 - 2025
    • CHAMBERLAIN Prior to 2014
    • GENIE
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    • Linear - OSCO Gate Openers
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    • GTO PRO
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    • GCL-GH
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    • Visual Signal Devices
  • Liftmaster Commercial Door Openers
  • Liftmaster Overhead Replacement Parts
    • Liftmaster Logic 4.0 Operators
    • APT Operator Logic 5.0
    • H Operator Logic 5.0
    • DHJ Operator Logic 5.0
    • J Operator Logic 5.0
    • DJ Operator Logic 5.0
    • T Operator Logic 5.0
    • GH Operator Logic 5.0
    • GSD Operator Logic 5.0
    • GT Operator Logic 5.0
    • HJ Operator Logic 5.0
    • MGJ Operator Logic 5.0
    • MH Operator Logic 5.0
    • MHS Operator Logic 5.0
    • MJ Operator Logic 5.0
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    • SD Operator Logic 5.0
  • Replacement Arms
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    • Keystone Remotes
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    • Wayne Dalton
    • Marantec
    • Sear Craftsman
    • AAS / Security Brands
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  • GoControl Smart Home
  • Receivers
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    • Mighty Mule
    • Linear Pro Access
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    • Sentry
    • Genie
    • Albano
    • AAS / Security Brands
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    • Keystone Heddolf
    • Transmitter Solutions
    • Digi-Code
    • Pulsar
    • US Automatic
    • Seco-Larm
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  • Keypads
    • GTO PRO
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    • Linear Pro Access
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    • Linear IEI
    • Seco-larm
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    • Keystone Keypad
    • EMX Industries
    • Digi-Code
    • US Automatic
    • CareFree
    • Wayne Dalton
    • Marantec
    • AAS / Security Brands
    • APOLLO / NICE
  • Keypad Pedestals
  • Intercoms
    • GTO PRO
    • Linear Pro Access
    • Aiphone
    • AAS / Security Brands
  • Telephone Entry Systems
    • Linear Pro Access
    • Select Engineered Systems
    • Liftmaster
    • AAS / Security Brands
  • Gate Locks
    • GTO PRO
    • Sentry
    • Liftmaster
  • Vehicle Detectors
    • Hysecurity
    • Exit Wands - Vehicle Sensor
    • Base Loop Detectors
    • Diablo Controls Loop Detectors
    • EDI Loop Detectors
    • GTO Loop Detectors
    • NorthStar Vehicle Detectors
    • RENO Loop Detectors
    • Loop Sealant
    • EMX Industries
    • CARTELL
    • US Automatic
    • BEA Sensors
    • Linear / Nortek
    • Liftmaster
    • Optex Virtual Detectors
    • AAS / Security Brands
  • Loop Wire
    • GTO Loop Wire
    • BD Loops
    • Low Voltage Wire
  • BEA DOOR SENSORS
  • BIRCHER DOOR SENSORS
  • Safety Sensors
    • GTO PRO
    • SECO-LARM
    • Liftmaster
    • Omron
    • Allen Bradley
    • BFT
    • Sentry
    • Linear
    • Genie
    • EMX Industries
    • Digi-Code
    • Mighty Mule
    • Wayne Dalton
    • Miller Edge
    • US Automatic
    • Marantec
    • Apollo / NICE
  • Safety Edges
    • Miller Edge
    • Liftmaster
    • EMX Industries
  • Gate Hinges
    • Guardian
    • Liftmaster
  • Transformers
    • GTO PRO
    • Mighty Mule
    • Linear
    • Liftmaster
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    • Genie
  • Solar Panels
    • GTO PRO
    • Mighty Mule
    • Sentry
    • US Automatic
    • Liftmaster
  • Emergency Vehcile Access
  • Driveway Alarms
    • GTO PRO
    • SECO-LARM
    • Liftmaster
    • Sentry
  • Push Buttons
    • MMTC
    • Liftmaster
    • Sentry
    • Linear Pro Access
  • Wall Console & Panels
    • MyQ Accessories
    • Liftmaster & Chamberlain
    • Linear
    • Wayne Dalton
    • Seco-Larm
    • Marantec
  • Key Switches
    • MMTC
  • Proximity Card Readers
    • Linear Pro Access
    • Secura Key
    • Linear IEI
    • AAS / Security Brands
    • AWID
  • Gate Timers
    • GTO PRO
    • SECO-LARM
    • Genie
    • Sentry
    • AAS / Security Brands
    • EMX
  • Go Control
  • Batteries
  • Coil Cord / Cord Reels
  • Garage Accessories

Category

  • Garage Replacement Parts
    • CHAMBERLAIN After 2014
    • LIFTMASTER Prior to 2014
    • LIFTMASTER 2014 - 2021
    • LIFTMASTER 2022 - 2025
    • CHAMBERLAIN Prior to 2014
    • GENIE
    • MARANTEC
    • LINEAR / NICE
  • Gate Opener Replacement Parts
    • HySecurity Gate Openers
    • Liftmaster Gate Openers
    • Linear - OSCO Gate Openers
    • Mighty Mule Gate Openers
    • GTO PRO - LINEAR PRO Openers
    • US Automatic
    • NICE / APOLLO
  • Swing Gate Openers
    • US Automatic
    • Linear Pro Access
    • GTO PRO
    • Mighty Mule
    • Sentry
    • Liftmaster
    • APOLLO / NICE
  • Slide Gate Openers
    • US Automatic
    • Liftmaster
    • APOLLO / NICE
    • Linear Pro Access
    • GTO PRO
    • Mighty Mule
  • Barrier Gate Openers
    • Linear Pro Access
  • Gate Opener Circuit Boards
    • GTO PRO
    • Mighty Mule
    • Linear
    • Sentry
    • US Automatic
    • Apollo / NICE
    • Liftmaster
    • HySecurity
  • Garage Door Openers
    • Liftmaster
    • Genie
  • Garage Opener Circuit Boards
    • Genie
    • Linear
    • Chamberlain
    • LIftmaster
    • Sears Craftsman
    • Wayne Dalton
    • Marantec
  • Replacement Parts
    • Liftmaster Replacement Parts
    • Linear / Nortek Security
    • HySecurity
  • Genie Commercial Operator Parts and Accessories
    • GCL-GH
    • GCL-GT
    • GCL-H
    • GCL-J
    • GCL-LJ
    • GCL-LT
    • GCL-MH
    • GCL-MJ
    • GCL-MT
    • Door Interlock Switches
    • Expansion Modules
    • Key Switches
    • Mechanical Accessories
    • Photoeye
    • Pull Switches
    • Push Buttons Exteriors
    • Push Interiors
    • Radio Controls
    • Sensing Edges
    • Signals: Visual & Audio
    • Vehicle Motion Sensor
    • Visual Signal Devices
  • Liftmaster Commercial Door Openers
  • Liftmaster Overhead Replacement Parts
    • Liftmaster Logic 4.0 Operators
    • APT Operator Logic 5.0
    • H Operator Logic 5.0
    • DHJ Operator Logic 5.0
    • J Operator Logic 5.0
    • DJ Operator Logic 5.0
    • T Operator Logic 5.0
    • GH Operator Logic 5.0
    • GSD Operator Logic 5.0
    • GT Operator Logic 5.0
    • HJ Operator Logic 5.0
    • MGJ Operator Logic 5.0
    • MH Operator Logic 5.0
    • MHS Operator Logic 5.0
    • MJ Operator Logic 5.0
    • MT Operator Logic 5.0
    • SD Operator Logic 5.0
  • Replacement Arms
    • Liftmaster
    • US Automatic
    • Linear Pro Access
    • APOLLO
    • Sentry 300
    • GTO PRO
    • Mighty Mule
  • Remote Controls
    • GTO PRO
    • Mighty Mule
    • Liftmaster
    • Linear Pro Access
    • Genie / OverHead Door
    • Sentry
    • US Automatic
    • Albano
    • Came
    • Keystone Remotes
    • Digi-Code
    • Pulsar
    • Seco-Larm
    • Wayne Dalton
    • Marantec
    • Sear Craftsman
    • AAS / Security Brands
    • Apollo / NICE
  • GoControl Smart Home
  • Receivers
    • GTO PRO
    • Mighty Mule
    • Linear Pro Access
    • Liftmaster
    • Sentry
    • Genie
    • Albano
    • AAS / Security Brands
    • APOLLO / NICE
    • Keystone Heddolf
    • Transmitter Solutions
    • Digi-Code
    • Pulsar
    • US Automatic
    • Seco-Larm
    • Marantec
  • Keypads
    • GTO PRO
    • Mighty Mule
    • Linear Pro Access
    • Sentry
    • Linear IEI
    • Seco-larm
    • Genie
    • Liftmaster
    • Keystone Keypad
    • EMX Industries
    • Digi-Code
    • US Automatic
    • CareFree
    • Wayne Dalton
    • Marantec
    • AAS / Security Brands
    • APOLLO / NICE
  • Keypad Pedestals
  • Intercoms
    • GTO PRO
    • Linear Pro Access
    • Aiphone
    • AAS / Security Brands
  • Telephone Entry Systems
    • Linear Pro Access
    • Select Engineered Systems
    • Liftmaster
    • AAS / Security Brands
  • Gate Locks
    • GTO PRO
    • Sentry
    • Liftmaster
  • Vehicle Detectors
    • Hysecurity
    • Exit Wands - Vehicle Sensor
    • Base Loop Detectors
    • Diablo Controls Loop Detectors
    • EDI Loop Detectors
    • GTO Loop Detectors
    • NorthStar Vehicle Detectors
    • RENO Loop Detectors
    • Loop Sealant
    • EMX Industries
    • CARTELL
    • US Automatic
    • BEA Sensors
    • Linear / Nortek
    • Liftmaster
    • Optex Virtual Detectors
    • AAS / Security Brands
  • Loop Wire
    • GTO Loop Wire
    • BD Loops
    • Low Voltage Wire
  • BEA DOOR SENSORS
  • BIRCHER DOOR SENSORS
  • Safety Sensors
    • GTO PRO
    • SECO-LARM
    • Liftmaster
    • Omron
    • Allen Bradley
    • BFT
    • Sentry
    • Linear
    • Genie
    • EMX Industries
    • Digi-Code
    • Mighty Mule
    • Wayne Dalton
    • Miller Edge
    • US Automatic
    • Marantec
    • Apollo / NICE
  • Safety Edges
    • Miller Edge
    • Liftmaster
    • EMX Industries
  • Gate Hinges
    • Guardian
    • Liftmaster
  • Transformers
    • GTO PRO
    • Mighty Mule
    • Linear
    • Liftmaster
    • Sentry
    • Genie
  • Solar Panels
    • GTO PRO
    • Mighty Mule
    • Sentry
    • US Automatic
    • Liftmaster
  • Emergency Vehcile Access
  • Driveway Alarms
    • GTO PRO
    • SECO-LARM
    • Liftmaster
    • Sentry
  • Push Buttons
    • MMTC
    • Liftmaster
    • Sentry
    • Linear Pro Access
  • Wall Console & Panels
    • MyQ Accessories
    • Liftmaster & Chamberlain
    • Linear
    • Wayne Dalton
    • Seco-Larm
    • Marantec
  • Key Switches
    • MMTC
  • Proximity Card Readers
    • Linear Pro Access
    • Secura Key
    • Linear IEI
    • AAS / Security Brands
    • AWID
  • Gate Timers
    • GTO PRO
    • SECO-LARM
    • Genie
    • Sentry
    • AAS / Security Brands
    • EMX
  • Go Control
  • Batteries
  • Coil Cord / Cord Reels
  • Garage Accessories
  1. Home
  2. Transformers
  3. Liftmaster

LiftMaster Transformers for Automated Systems

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Products [60]

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Liftmaster 41C168 Transformer Chamberlain Replacement Garage Door Opener Parts
LiftMaster 041C0168 120V Transformer and Wire Harness Kit
$70.79
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Liftmaster 85LM Optional Universal Radio Control Plug-In AC Transformer 22vac
LiftMaster 85LM Plug-In AC Transformer for Radio Receivers
$18.00
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Liftmaster 41A7635 Transformer 100v & Harness Craftsman Garage Replacement Parts
LiftMaster 41A7635 100VA Transformer and Wire Harness Kit
$90.50
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Liftmaster 365LM 315HZ Universal Plug-In w/ Transformer Smart Garage Door Opener
LiftMaster 365LM 315MHz Universal Plug-In Receiver
$44.95
(1)
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Liftmaster 95LM Optional Transformer
LiftMaster 95LM Optional Transformer
$21.95
(1)
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Liftmaster 41C190 - Transformer and harness
Liftmaster 41C190 - Transformer and harness
$70.79
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Liftmaster 41C153 - Transformer for 2500
Liftmaster 41C153 - Transformer for 2500
$67.42
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Liftmaster 41C213 - Transformer and harness
Liftmaster 41C213 - Transformer and harness
$80.23
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Liftmaster 21-16699 Transformer, 120/240V, 75VA, 24VAC
Liftmaster 21-16699 Transformer, 120/240V, 75VA, 24VAC
$54.59
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Liftmaster 21-16698 Transformer, 28/24/48V, SJ123, SJ143
Liftmaster 21-16698 Transformer, 28/24/48V, SJ123, SJ143
$104.21
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Liftmaster 21-5575 Transformer, 575V 24VAC
Liftmaster 21-5575 Transformer, 575V 24VAC
$33.31
Not for Sale
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Liftmaster K21-14182 Transformer, 120/240V, 24VAC, 20VA
LiftMaster K21-14182 120/240V to 24VAC 20VA Transformer
$39.20
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Liftmaster LM-21-35057 Transformer, 460V, 24 VAC
LiftMaster K21-35057 460V to 24VAC Transformer
$64.95
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Liftmaster K21-35077 Transformer, 575V, 24VAC
LiftMaster K21-35077 575V to 24VAC 40VA Transformer
$81.34
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Liftmaster K21-36793 Transformer, 208/230/460V-20VA
Liftmaster K21-36793 Transformer, 208/230/460V-20VA
$43.57
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Liftmaster 21-7115-1 Transformer, 115/230V, 1HP
LiftMaster 21-7115-1 Transformer, 115/230V, 1 Phase
$229.10
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Liftmaster 21-7460-1 Transformer, 230/460V, 3 PH
LiftMaster 21-7460-1 Transformer, 230/460V, 3 Phase
$241.63
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Liftmaster 21-7575-1 Transformer, 575V, 3PH
LiftMaster 21-7575-1 Transformer, 575V, 3 Phase
$352.25
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Liftmaster 21-5230 Transformer, 208/240V, 24VAC, 40VA
LiftMaster 21-5230 Transformer, 208/240V Input to 24VAC, 40VA
$39.62
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Liftmaster 21-5460 Transformer, 460V
LiftMaster 21-5460 Transformer, 460V
$99.95
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Liftmaster 21-3460-1 Transformer, 230/460V Prim, 24SEC
LiftMaster 21-3460-1 Transformer 230/460V Primary 24V Secondary
$211.50
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Liftmaster 21-3575-1 Transformer, 575V, PRIM 24 SEC 100
LiftMaster 21-3575-1 Transformer 575V Primary 24V Secondary 100VA
$223.31
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Liftmaster K21-5115 replacement Transformer (115V/240V) Commercial Gate Opener
LiftMaster K21-5115 Transformer, 120V to 24VAC, 40VA for Commercial Door and Gate Operators
$56.11
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Liftmaster K21-10340 15V Transformer Kit (24VAC, 20VA) Mechanical Commercial
LiftMaster K21-10340 115V Transformer Kit, 24VAC 20VA for Mechanical Commercial Door Operators
$45.37
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Liftmaster K74-30763 LA400 Plug-In Transformer 120VAC 50-60Hz 36VDC 1.1A Output
LiftMaster K74-30763 Plug-In Transformer for LA400 Swing Gate Operators
$84.65
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Liftmaster 41C0296 Transformer, 12V, RJO 041C0296 8500W Garage Door Operators
Liftmaster 41C0296 Transformer, 12V, RJO 041C0296 8500W Garage Door Operators
$85.25
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Liftmaster 041A0308 AC Lock Transformer and Wire Harness Replacement Kit
Liftmaster 041A0308 AC Lock Transformer and Wire Harness Replacement Kit
$53.40
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Liftmaster 041D0277-1 Transformer, Wi-Fi Battery Backup Garage Door Openers
Liftmaster 041D0277-1 Transformer, Wi-Fi Battery Backup Garage Door Openers
$84.16
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Liftmaster K002B0821-1 Transformer for EL1SS Telephone Entry System 002B0821-1
LiftMaster K002B0821-1 Transformer for EL1SS Telephone Entry System
$54.79
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Liftmaster 41C0190 Transformer Wire Harness Kit Chamberlain Belt Drive 41C190
Liftmaster 41C0190 Transformer Wire Harness Kit Chamberlain Belt Drive 041C190
$70.79
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Liftmaster 41C0153 Transformer 120VAC 150VA Chamberlain 041C0153 Belt Drive Unit
Liftmaster 41C0153 Transformer 120VAC 150VA Chamberlain 041C0153 Belt Drive Unit
$67.42
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Liftmaster K204C0211 Transformer, CSW24 (swing gate) CSL24 (slide gate) Operator
Liftmaster K204C0211 Transformer, CSW24 (swing gate) CSL24 (slide gate) Operator
$147.20
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Liftmaster K21-3260-1 K21-3260-1 TRANSFORMER, 120 / 208 / 230 / 460 / 60VA
Liftmaster K21-3260-1 K21-3260-1 TRANSFORMER, 120 / 208 / 230 / 460 / 60VA
$76.48
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Liftmaster K21-5230 Transformer, 208/240V, 24VAC, 40VA 21-5230 Commercial Opener
Liftmaster K21-5230 Transformer, 208/240V, 24VAC, 40VA 21-5230 Commercial Opener
$54.75
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Liftmaster K21-35057 Transformer 460V 24VAC 21-35057 Commercial Door Operators
Liftmaster K21-35057 Transformer 460V 24VAC 21-35057 Commercial Door Operators
$63.99
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Liftmaster K21-10340 Transformer, 155V, 24VAC, 20VA-215115LD, 21-10340, 2110340, G215115LD
Liftmaster K21-10340 Transformer, 155V, 24VAC, 20VA-215115LD, 21-10340, 2110340, G215115LD
$48.95
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liftmaster K21-5230 Transformer, 208/240V, 24VAC, 40VA
liftmaster K21-5230 Transformer, 208/240V, 24VAC, 40VA
$54.95
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Liftmaster 21-40383, TRANSFORMER, 120/66V, 270VA
LiftMaster 21-40383 120/66V 270VA Transformer for SL930
$143.23
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Liftmaster 21-40384, TRANSFORMER, 120/18V, 125VA
LiftMaster 21-40384 120/18V 125VA Transformer for SL920
$218.16
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Liftmaster K204A0276, TRANSFORMER, 575VAC, 200VA
LiftMaster K204A0276 575VAC 200VA Transformer for SL585U and SL595U
$204.48
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Liftmaster K21-10298, TRANSFORMER, 100VA,120/208/277V
LiftMaster K21-10298 100VA Transformer 120/208/277V for Gate Operators
$198.07
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Liftmaster K21-15453, TRANSFORMER, 100VA, 120/208/240/460V
LiftMaster K21-15453 100VA Transformer 120/208/240/460V for Gate Operators
$170.44
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Liftmaster K21-40074, TRANSFORMER, 120/13.5V, 100VA, 60HV
LiftMaster K21-40074 120/13.5V 100VA Transformer for Commercial Gate Operators
$90.66
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Liftmaster K21-40359, TRANSFORMER, 120V
LiftMaster K21-40359 120V Transformer for SL3000 and CSW200 Operators
$84.08
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Liftmaster K41-0067-000, TRANSFORMER, HD SWING AND SLIDE
LiftMaster K41-0067-000 Transformer, HD Swing and Slide
$325.36
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Liftmaster K76-33313, TRANSFORMER, 575V, 100VA
Liftmaster K76-33313, TRANSFORMER, 575V, 100VA
$343.90
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Liftmaster MA015, TRANSFORMER, 24V
LiftMaster MA015 24V Transformer for Mega Barrier Operators
$175.91
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Liftmaster MS015, TRANSFORMER, 110/220V, 24VAC
Liftmaster MS015, TRANSFORMER, 110/220V, 24VAC
$147.90
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LiftMaster APOW3 - K76-37251 Transformer
LiftMaster APOW3 - K76-37251 Transformer
$37.95
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Liftmaster 041A7635, TRANSFORMER AND WIRE HARNESS KIT, 100VA
LiftMaster 041A7635 100VA Transformer and Wire Harness Kit
$90.50
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Frequently Asked Questions : Liftmaster Transformers

Q1: What is the primary role of a LiftMaster transformer?

A1: A LiftMaster transformer converts standard high-voltage AC power from a household or commercial outlet into the low-voltage AC or DC power required by a gate or garage door operator. This ensures that the logic board and accessories receive a stable power supply suited for sensitive electronic components.

Q2: What are the standard voltage specifications for these transformers?

A2: LiftMaster transformers are typically designed to step down 120V AC household power to specific secondary outputs, most commonly 16V AC or 24V AC. The required output depends on the specific logic board requirements and the type of motor being powered.

Q3: How is compatibility determined for a replacement transformer?

A3: Compatibility is determined by matching the original equipment manufacturer (OEM) part number found in the operator's manual. It is essential to verify that the replacement unit matches the electrical input/output ratings and connector types of the existing system.

Q4: What are common symptoms of a failing LiftMaster transformer?

A4: Signs of a failing transformer often include a complete lack of power to the control board, unresponsive accessories, or an audible humming noise from the component. If the primary power source is active but the secondary terminals show no voltage, the transformer likely requires replacement.

Q5: Can a transformer be tested with a multimeter?

A5: Yes, a technician can use a digital multimeter to test for continuity across the windings and to measure the AC voltage output at the secondary terminals. Because this involves working with live electricity, users should always refer to the manufacturer's manual or hire a local licensed professional for testing.

Q6: Do these transformers have internal circuit protection?

A6: Many LiftMaster transformers include internal thermal fuses designed to permanently open the circuit if the component reaches a dangerous temperature. Once this internal protection is triggered, the transformer cannot be reset and must be replaced entirely to restore power to the system.

Q7: Does a transformer protect against lightning strikes?

A7: While transformers provide a buffer between the grid and the logic board, they are not dedicated surge suppression devices. To protect against lightning or significant grid fluctuations, a separate high-quality surge protector should be installed at the primary power outlet.

Q8: Why might a transformer produce a loud buzzing sound?

A8: A buzzing or humming sound is often caused by vibrations in the laminated core of the transformer or a loose mounting bracket. While slight humming is normal, excessive noise may indicate an internal fault or an impending electrical failure.

Q9: Can transformers be swapped between different operator brands?

A9: Transformers are generally not interchangeable between different brands due to variations in voltage outputs, amperage ratings, and physical wiring connectors. Utilizing an incorrect transformer can cause permanent damage to the operator's logic board and electrical components.

Q10: What is the procedure for replacing a LiftMaster transformer?

A10: Replacing a transformer involves disconnecting all power sources, removing the old unit from the chassis, and correctly mapping the low-voltage lead wires to the new terminals. For specific wiring diagrams and safety protocols, consult the manufacturer's installation manual or hire a qualified local technician.
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