41B4375-3 Terminal Block with Screws - No MOV
The LiftMaster 41B4375-3 is a low-voltage terminal block used where the opener control board requires the no-MOV terminal style. The terminal block is where low-voltage field wiring is secured, typically for wall-control or accessory wiring depending on the opener design. A cracked or stripped terminal block can cause intermittent operation, loose wires, or service headaches. The key caution with this item is availability and exact design: LiftMaster lists the part as discontinued with no compatible replacement, and similar terminal blocks can have different MOV/surge components or board connections. It should be handled as a specific replacement part, not a universal screw terminal.
Compatible With
For select LiftMaster and Chamberlain garage door openers that specify 041B4375-3 or 41B4375-3 in the parts diagram. Manufacturer references describe it as a no-MOV terminal block for various garage door openers and currently show it as discontinued with no compatible replacement. Some supplier listings associate it with model 3850. Verify the original board and terminal block before ordering.
Features and Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
| Product Type | Terminal block with screws - no MOV |
| Part Number | 41B4375-3 |
| Application | Low-voltage terminal replacement |
| Compatible Operator Type | Select LiftMaster and Chamberlain garage door openers |
| MOV / Surge Component | No MOV |
| Status | Manufacturer-listed as discontinued/no compatible replacement |
| Notes | Do not substitute MOV-style terminal blocks without parts diagram confirmation |
Also Known As / Related Part Numbers
- 041B4375-3
- 41B4375-3
- LiftMaster 41B4375-3
- Terminal block no MOV
- No MOV terminal block
- LiftMaster terminal block with screws
- 03-41B4375-3
- 41B4375 3
Technician Note
Because this is a no-MOV terminal block and is listed as discontinued, verify both inventory status and exact board fitment before publishing or selling the item.
Before Ordering Checklist
- Confirm the original terminal block is 41B4375-3 or 041B4375-3.
- Verify that the opener requires the no-MOV version.
- Do not substitute 41A3150 or another terminal block unless the parts diagram confirms it.
- Check for cracked board solder pads or damaged low-voltage wiring.
- Review inventory status because LiftMaster lists this item as discontinued.
Professional Advisory
If the terminal block is damaged from a short, corrosion, or board failure, replacing only the terminal block may not restore safe operation. Do not bypass photo eyes or safety devices to test the opener.
Important Ordering Warnings
- LiftMaster lists this part as discontinued with no compatible replacement.
- Similar-looking terminal blocks may not have the same MOV/surge configuration or board connection.
Product Questions and Answers
What does no MOV mean on 41B4375-3?
It indicates this terminal block version does not include the MOV-style surge component used on some other terminal block designs.
Is 41B4375-3 still available from LiftMaster?
LiftMaster lists 041B4375-3 as discontinued with no compatible replacement. Inventory should be manually reviewed.
Can I replace 41B4375-3 with 41A3150?
Not unless the opener parts diagram confirms it. 41A3150 is a different terminal block reference commonly associated with MOV-style applications.
Which opener models use this part?
It is for select LiftMaster and Chamberlain openers that list 41B4375-3. Some supplier references mention model 3850, but model-specific verification is required.
Will this fix a wall control that does not work?
Only if the terminal block is the problem. Wall control failure can also come from wiring, sensor wiring conflicts, logic board faults, or the wall station itself.
