Description
187 – Series Thermal Circuit Breakers – Surface Mount
120 Amp Circuit Breaker
PN:7146
Features:
- Combines switching and circuit protection into a single device
- All components meet SAE J1171 external ignition protection requirements
- Clear, single lever operation
- “Trip Free” design cannot be held “ON” during fault current condition
- Waterproof
- Recessed mounting holes for clean appearance
- Large clearance around terminal studs accept heavy gauge wire lugs
- Robust 5/16 terminals provide high torque connections
- Large lever with vertical/horizontal orientation provides indication of trip status
- Ignition protected – safe for installation aboard gasoline powered boats

Specifications:
- Amperage: 120a
- Box Dimensions: 2″H x 4″W x 5″L WT: 0.5 lbs
- UPC: 632085071462
![Blue Sea 7433 Single Pole Small Case 2 Slot Reset Rocker Circuit Breaker – 50 Amp [7433]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756622725/blue-sea-7433-single-pole-small-case-2-slot-reset-rocker-circuit-breaker-50-amp-7433.webp)
![Blue Sea 7408 Single Pole Small Case 2 Flat Rocker Circuit Breaker – 50 Amp [7408]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756622725/blue-sea-7408-single-pole-small-case-2-flat-rocker-circuit-breaker-50-amp-7408.webp)
![Blue Sea 8173 Mounting Panel for Toggle Type Magnetic Circuit Breakers [8173]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756622725/blue-sea-8173-mounting-panel-for-toggle-type-magnetic-circuit-breakers-8173.webp)
![Blue Sea 7405 Single Pole Small Case 2 Flat Rocker Circuit Breaker – 25 Amp [7405]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756622725/blue-sea-7405-single-pole-small-case-2-flat-rocker-circuit-breaker-25-amp-7405.webp)
![Blue Sea 7224 AC / DC Single Pole Magnetic World Circuit Breaker – 40 Amp [7224]](https://www.micrometerx.com/wp-content/uploads/2025/8/1756622730/blue-sea-7224-ac-dc-single-pole-magnetic-world-circuit-breaker-40-amp-7224.webp)