LiftMaster K-127A0113B Mega Arm Sprint Chip
The LiftMaster K-127A0113B is the Sprint version logic chip for select LiftMaster Mega Arm commercial barrier gate operators. Sprint applications are speed-sensitive, so the correct firmware chip matters for timing, sequence, and operator behavior. This part should be ordered by exact chip number, not just by the Mega Arm name, because LiftMaster produced several Mega Arm chip versions for standard, trap, sprint, and combined sprint/trap functions. If a Mega Arm Sprint operator is behaving erratically, the technician should inspect the battery system, motor control circuit, limits, harnesses, access-control inputs, loops, and safety devices before assuming the chip is the only failed part. Correct chip selection helps avoid the wrong operating sequence on a high-cycle barrier lane.
For customer service and parts-counter work, this part should be treated as an exact-fit service component. The safest match is the part number on the original component, the operator model tag, and the LiftMaster parts diagram for that model. Similar LiftMaster parts can share the same general operator family but still differ by chip logic, thread direction, shaft size, mounting pattern, gearbox location, or generation.
Compatible With
This compatibility list is written from currently supportable product listings and service-part references. Always verify the installed operator and original part number before ordering.
- LiftMaster Mega Arm Series commercial gate operators
- Mega Arm Sprint applications using K-127A0113B
- Mega Arm control boards where the original chip is marked K-127A0113B
- Related Mega Sprint barrier operator service applications verified by diagram
Features & Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
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| Part Number | K-127A0113B |
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| Product Type | Mega Arm Sprint Logic Chip |
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| Application | Mega Arm Sprint high-speed barrier gate logic |
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| Compatible Operator Type | Commercial gate, barrier gate, or access operator application as listed below |
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| Notes | Match the original part number and operator parts diagram before ordering. |
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| Component Style | Removable logic / firmware chip |
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| Electrical Note | Board-level service part; not a complete control board |
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Also Known As / Related Part Numbers
- K-127A0113B
- 127A0113B
- K127A0113B
- LM-K-127A0113B
- Mega Arm Sprint Chip
Technician Note
This part should be replaced only after the original component has been identified and the surrounding system has been inspected. For control chips, confirm the board is not damaged and that power, limits, accessory inputs, and safety wiring are not causing the fault. For mechanical or gearbox parts, inspect adjacent wear points before reassembly.
Before Ordering Checklist
- Match the original part number to K-127A0113B.
- Confirm the operator model and product family.
- Check the LiftMaster parts diagram for the exact installed unit.
- Compare any thread direction, size, mounting style, board marking, or gearbox location.
- Do not assume similar-looking LiftMaster parts are interchangeable.
Important Ordering Warnings
- Do not use a standard Mega Arm chip when the operator requires the Sprint chip.
- This part does not repair worn mechanical parts, weak batteries, failed motor controls, or damaged wiring.
- High-speed barrier gates should be serviced carefully to avoid unsafe arm movement.
Professional Advisory
Gate and barrier operators can move with enough force to cause injury or property damage. Do not bypass safety devices during troubleshooting. If the repair involves control-board diagnosis, high-voltage circuits, heavy barrier arms, gearbox service, or unexpected operator movement, have the system inspected by a qualified gate technician.
Product Questions & Answers
What does Sprint mean on this chip?
Sprint refers to a Mega Arm high-speed barrier gate application that uses its own logic version.
Is K-127A0113B the same as the trap chip?
No. K-127A0113B is the Mega Arm Sprint chip. Trap and Sprint/Trap applications use different chip numbers.
Can this be used on any Mega Arm?
Only use it when the original chip or parts diagram calls for K-127A0113B.
What symptoms may lead to checking this chip?
Improper sequence, no response after board service, or incorrect chip installation can lead a technician to inspect the firmware chip.
Should batteries and limits be checked too?
Yes. Mega Arm Sprint problems can also come from batteries, limits, wiring, safety devices, and control board faults.
