ID
1001754
$ 144.80
1-2 weeks delivery time
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The Blue Sea 7138 187-Series Circuit Breaker is a 40A 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 5/16″-18 (M8) studs for high-torque cable connections. Ignition protected and rated up to 5000A @ 14V DC interrupt capacity. Weight: 0.58 lb (0.26 kg).
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Blue Sea 7138 – 187-Series Surface Mount Circuit Breaker 40A, 48V DC, Type III Manual Reset
The Blue Sea 7138 is a 187-Series surface mount circuit breaker rated at 40A for systems up to 48V DC. It combines switching and circuit protection in a single waterproof device for marine and vehicle electrical installations.
The breaker features a thermally responsive bi-metal blade and a trip-free manual reset lever that cannot be held ON during a fault condition. Its ignition-protected and weather-resistant construction makes it suitable for gasoline powered boats and exposed mounting locations.
Key Features
- 187-Series circuit breaker, surface mount
- 40A rating, up to 48V DC
- Switching and circuit protection in one device
- Type III – switchable/manual reset, trip-free
- Waterproof housing
- Ignition protected for marine installations
- Clear single lever operation with trip indication
- Recessed mounting holes for clean appearance
- Large terminal clearance for heavy gauge wire lugs
- 5/16″ (M8) terminal studs for high-torque connections
Technical Specifications
Product Number 7138 Series 187-Series Amperage 40A 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: Not intended for use as a switch where high inrush currents are expected.
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