Description
Blue Sea 7136 187 Series 30A Thermal Breaker | Boat Supply Store
Navigate the complexities of marine electrical systems with the Blue Sea 7136 187 Series Thermal Circuit Breaker, designed for integrated switching and protection up to 30 amps. This unit provides critical SAE J1171 ignition protection, making it safe for gasoline-powered vessels by preventing spark ignition in engine compartments. Its robust thermoset polyester case and a 5000A @12V DC interrupt rating ensure durability and reliable performance in demanding offshore or coastal environments.
Key Features
- Integrates switching and circuit protection into a single unit, simplifying installation.
- Ensures Safety with SAE J1171 external ignition protection for gasoline-powered boats.
- Offers Clear Operation via a single, easily manipulated lever indicating trip status.
- Provides Reliable Protection with a trip-free design that prevents manual resetting of an overcurrent condition.
- Maintains Watertight Integrity for dependable function in wet marine conditions.
- Facilitates Clean Installation with recessed mounting holes for a flush, professional appearance.
- Accommodates Heavy Gauge Wire with large clearance around robust 5/16 terminals for secure connections.
- Delivers High Torque Connections through substantial 5/16 inch terminal studs.
Specifications
| Product Specifications | |
|---|---|
| Amp Rating | 30 Amp |
| Voltage Rating Maximum | 48V DC |
| Type | III (Switchable/Manual Reset/Trip Free) |
| Actuator | Thermally Responsive Bi-Metal Blade |
| Case Material | Thermoset Polyester |
| Interrupt Rating @ 12V DC | 5000A |
| Operating Temperature | -25°C to +82°C |
| Ignition Protection | SAE J1171 |
| Waterproof | Yes |
Who This Is For
This circuit breaker is essential for marine enthusiasts and professional marine electricians seeking robust, integrated switching and protection for 12V, 24V, or 42V DC systems. It is particularly vital for owners of gasoline-powered vessels where stringent ignition protection is a mandatory safety requirement.
How It Compares
| Feature | Blue Sea 7136 187 Series 30A Thermal Breaker | Blue Sea Systems 7137 187 Series Thermal Circuit Breaker |
|---|---|---|
| Amp Rating | 30 Amp | 40 Amp, 30 Amp |
| Voltage Rating Maximum | 48 Volts DC | 48 Volts DC, 12-24 Volts DC |
| Interrupt Rating @ 12V DC | 5,000 Amperes | 5,000 Amperes, 3,000 Amperes |
| Ignition Protection (SAE J1171) | Yes | Yes, Yes |
| Integrated Switch | Yes | Yes, No |
Common Concerns Answered
Could I select the wrong amperage for my application?
Correct amperage selection is paramount for system safety and component longevity. Always consult your vessel's wiring diagrams and device specifications to ensure this 30A breaker is appropriate for the protected circuit. Over or under-sizing can lead to equipment damage or fire hazards.
Is the interrupt rating sufficient for my high-demand systems?
The Blue Sea 7136 breaker offers a 5,000A interrupt rating at 12V DC, suitable for most standard marine applications. For extremely high-fault current scenarios, alternative breakers with higher interrupt ratings may be required; consult a marine electrical professional if you suspect such needs.
What if I need a higher amperage breaker?
Blue Sea Systems offers the 187 Series in multiple amperage ratings, including a 40A option (MPN 7137), which may be more suitable for higher-draw circuits. Always verify the required amperage for your specific equipment to ensure proper protection.
Frequently Asked Questions
What is the voltage rating of the Blue Sea 7136 187 Series Thermal Circuit Breaker?
The maximum voltage rating for the Blue Sea 7136 187 Series Thermal Circuit Breaker is 48V DC.
What is the interrupt rating of this circuit breaker at different voltages?
The interrupt rating is 5,000 Amperes at 12V DC. While not explicitly stated for higher voltages in this specification, it is designed for use in 12V, 24V, and 42V DC systems.
Is this circuit breaker ignition protected for gasoline-powered boats?
Yes, this circuit breaker meets SAE J1171 external ignition protection requirements, making it safe for installation aboard gasoline-powered vessels.
What is the operating temperature range for this breaker?
The Blue Sea 7136 187 Series breaker operates within a temperature range of -25°C to +82°C (-13°F to +180°F).
What does 'Trip Free' design mean for this circuit breaker?
A 'Trip Free' design means that the circuit breaker cannot be manually held in the 'on' position when an overcurrent condition is present; it will always trip to the 'off' position to protect the circuit.
