41A3150 Terminal Block with MOV and Screws
The LiftMaster 41A3150 terminal block is the screw-terminal interface used on select opener logic board/control wiring areas. When the terminal block is cracked, stripped, corroded, loose, or physically damaged, wall controls and safety sensor wiring may not stay connected properly. This kit is important because terminal block styles can look similar but differ in board connection, MOV surge-protection design, and mounting layout. A bad terminal block can create intermittent control problems, but it is not always the only cause; wiring shorts, damaged photo eye wires, wall control faults, and logic board damage should also be considered.
Compatible With
LiftMaster lists 041A3150 compatibility with models including 3240, 8355, 3265, 3280, WLED, 1346, and 1345. Other supplier references commonly associate 41A3150 with 3130, Formula I, 8557, and 8587 opener applications. It may be used on select screw drive, belt drive, and chain drive residential opener models that call out this terminal block in the parts diagram. Verify the original terminal block and logic board layout before ordering.
Features and Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
| Product Type | Terminal block with screws |
| Part Number | 41A3150 |
| Application | Low-voltage control wiring terminal replacement |
| Compatible Operator Type | Select screw drive, belt drive, and chain drive residential garage door openers |
| Safety Monitoring | Used in low-voltage control/sensor wiring area when applicable |
| Included Components | Terminal block with screws |
| Notes | MOV version; do not confuse with no-MOV terminal blocks |
Also Known As / Related Part Numbers
- 041A3150
- 41A3150
- 41D3150
- 1A2510
- 4A1252
- LiftMaster terminal block with screws
- Terminal block with MOV
- Low voltage terminal block
- LiftMaster 12-41A3150
Technician Note
If the terminals are burnt, melted, or repeatedly damaged, inspect the connected low-voltage wiring and logic board. A replacement terminal block should not be used to hide a shorted accessory wire or board problem.
Before Ordering Checklist
- Match the original part number to 41A3150, 041A3150, 41D3150, 1A2510, or 4A1252.
- Confirm the opener model or parts diagram calls for the MOV-style terminal block.
- Check whether your original part is a no-MOV terminal block such as 41B4375-3.
- Inspect wall-control and photo-eye wiring for shorts or corrosion.
- Verify the logic board is not cracked or damaged where the terminal block mounts.
Professional Advisory
Low-voltage terminal work is safer than line-voltage repair, but miswiring wall controls or safety sensors can create troubleshooting problems. Do not bypass monitored safety devices to make the opener run.
Important Ordering Warnings
- Do not substitute this MOV-style terminal block for a no-MOV terminal block unless the parts diagram confirms compatibility.
- If the opener has high-voltage damage or a failed logic board, replacing the terminal block alone may not repair it.
Product Questions and Answers
What wiring connects to the 41A3150 terminal block?
Depending on the opener, it may connect low-voltage wall control, safety sensor, and accessory wiring to the opener control area.
Which models are listed with 41A3150 compatibility?
LiftMaster references include 3240, 8355, 3265, 3280, WLED, 1346, and 1345, with additional supplier references for models such as 3130, 8557, and 8587.
Is 41A3150 the same as 41B4375-3?
No. 41A3150 is commonly referenced as a terminal block with MOV, while 41B4375-3 is a no-MOV terminal block and is not automatically interchangeable.
What are alternate part numbers for 41A3150?
Common references include 041A3150, 41D3150, 1A2510, and 4A1252.
Will this fix safety sensor problems?
Only if the terminal block is the faulty connection point. Sensor alignment, wiring breaks, shorted wires, or logic board issues can cause similar symptoms.
