Liftmaster 180B133 SWITCH

The LiftMaster 180B133 Limit Switch is a genuine OEM replacement part for legacy LiftMaster trolley, jackshaft, gear, and hoist operators. Rated 10A at 24VAC, SPDT, this older-model limit switch regulates the physical travel limits of operator components. When a moving part passes a set boundary and presses the lever tab, the tab actuates the red button/switch to stop motion and prevent damage.

How it works
The limit switch mounts so a cam or linkage trips the lever at the exact open/close limit. Tripping the lever opens or changes the circuit state, protecting the operator and door hardware from over-travel.

Product highlights

• Legacy LiftMaster replacement limit switch to keep early operators in service

• Physical-boundary switch for precise travel limits

• For certain LiftMaster 1000 and 2000 Series model operators

• Compatible families include: GJ, HJ, HT, MJ, MT

• Replacement part for older LiftMaster operators; check your operator manual to confirm compatibility

Product details

• Part number: 180B133

• Type: Limit switch

• Electrical rating: 10A, 24VAC, SPDT

• Application: Travel limit control and over-travel protection on legacy commercial/industrial operators

• Construction: OEM-grade components for durability and repeatable actuation

Dimensions

• Length: 2 inches

• Width: 7/8 inches

• Depth: 3/8 inches

Label information (as marked)

• 16A 1/2HP 125 250VAC~

• 0.1A 125VDC

• V-16G4-1C-25-K

• 16(3)A 250V~

• T105 5E4

Why choose genuine LiftMaster parts
Using authentic LiftMaster components ensures proper fit, safe operation, and long-term reliability. Replacing a worn limit switch restores accurate travel control and helps prevent costly damage.

Key benefits

• Restores precise open/close limits

• Protects the operator from over-travel

• OEM fit and consistent performance

• Suitable for many legacy LiftMaster models