ID
1001760
$ 152.60
1-2 weeks delivery time
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The Blue Sea 7146 187-Series Circuit Breaker is a 120A surface-mount Type III breaker for 48V DC systems, combining switching and circuit protection in one waterproof unit. It uses a thermally responsive bi-metal blade and a trip-free manual reset lever with vertical or horizontal trip indication. Designed with 5/16″-18 (M8) stud terminals for heavy gauge lugs and high-torque connections. Interrupt capacity up to 5000A @ 14V DC. Operating temperature range: -40°C to +85°C. Weight: 0.58 lb (0.26 kg).
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Blue Sea 7146 – 187-Series Surface Mount Circuit Breaker 120A, 48V DC, Type III Manual Reset
The Blue Sea 7146 is a 187-Series surface mount circuit breaker rated at 120A for systems up to 48V DC. It combines switching and circuit protection in a single waterproof device for marine and vehicle electrical installations.
This breaker features a thermally responsive bi-metal blade and a trip-free manual reset mechanism that cannot be held ON during a fault condition. A large lever supports vertical or horizontal orientation and provides clear visual trip status. The housing includes recessed mounting holes and large terminal clearance for heavy gauge wire lugs.
Key Features
- 187-Series circuit breaker, surface mount
- 120A rating, up to 48V DC
- Combined switching and circuit protection
- Type III – switchable/manual reset – trip free
- Waterproof construction
- Ignition protected for gasoline engine compartments
- Clear single lever operation with trip indication
- Recessed mounting holes for clean installation
- Large terminal clearance for heavy gauge wire lugs
- Robust 5/16″ (M8) stud terminals for high-torque connections
Technical Specifications
Product Number 7146 Series 187-Series Amperage 120A Maximum Voltage 48V DC Mounting Surface Mount Breaker Type Thermally responsive bi-metal blade Breaker Class Type III – switchable/manual reset – trip free Interrupt Capacity 5000A @ 14VDC / 3000A @ 28VDC / 1500A @ 48VDC Terminal Stud Size 5/16″ - 18 (M8) Terminal Stud Torque 75 in-lb (8.47 Nm) Mounting Hole Accept #10 (M5) screw Operating Temperature -40°C to +85°C Case Material Thermoset Polyester Weight 0.58 lb (0.26 kg)
Standards & Protection
- CE Marked
- Ignition Protected
- IP66
- SAE J1171
Note: Do not use as a switch where high inrush currents are expected.
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