Ātrsavienojuma kļūdas automāts ar tikai atiestatīšanas pogu — 20 A

The BLUE SEA 7057-BSS 20-amp circuit breaker is designed to protect marine electrical circuits from overcurrent. It prevents damage to equipment and cables by interrupting the circuit in case of electrical overload or short circuit.

This circuit breaker is rated for a maximum current of 20 amperes. It is essential to ensure that the nominal current of the circuit being protected does not exceed this value to guarantee effective protection.

This is a thermal circuit breaker. It operates by detecting the heat generated by an overcurrent in the circuit, which causes the protection mechanism to trip.

This circuit breaker is designed to operate with marine electrical systems up to a maximum voltage of 32V DC (direct current).

After a trip caused by an overload, simply press the reset pushbutton located on the circuit breaker. Before resetting, it is advisable to check the cause of the trip to prevent it from tripping again immediately.

The main difference is that this circuit breaker is resettable. After tripping, it can be reset manually using its push-button, eliminating the need to replace a consumable component like a fuse. A fuse, once blown, must be replaced.

Yes, this circuit breaker is specifically designed by BLUE SEA Systems for marine applications. It is resistant to harsh marine conditions, including humidity and salt spray, and meets relevant maritime standards.

Yes, this circuit breaker is compliant with SAE J1171, meaning it is ignition-protected. This feature is critical for installations in engine compartments where flammable vapors may pose a risk.

It is ideal for protecting secondary circuits and individual equipment requiring up to 20 ampere protection. This includes, for example, lighting circuits, small to medium bilge pumps, fans, isolated navigation equipment, or other auxiliary accessories.

This circuit breaker uses Faston 0.250" (6.35mm) quick-connect terminals. Simply insert the corresponding cable lugs into the breaker's terminals to establish the connection.

It is essential to use cables with an appropriate cross-section for a 20-amp circuit to prevent overheating. The cable cross-section depends on the circuit length and the allowable voltage drop, but for 20A, cables of 12 AWG (approximately 3.3 mm²) or larger are typically recommended for common marine applications.

Yes, this circuit breaker is compatible with electrical systems operating on 12V DC and 24V DC, as well as other DC voltages up to a maximum of 32V DC.

No, this 20-ampere circuit breaker is not suitable for protecting a starter motor. Starter motors require very high-intensity circuit breakers (often several hundred amperes) designed to handle high inrush currents. This circuit breaker is intended for low- to medium-power auxiliary circuits.

Although primarily designed for marine use, its specifications (32V DC, 20A, ignition protection) make it potentially suitable for certain automotive or recreational vehicle (RV) applications requiring similar circuit protection, particularly where moisture resistance is an advantage. It is always recommended to verify the specifications and standards specific to the intended application.

Yes, this circuit breaker can replace a 20 amp fuse in a DC circuit, provided the circuit’s maximum voltage (up to 32V DC) and the breaker’s interrupt rating are suitable for the application. The advantage is that it is resettable, avoiding the need to replace a fuse.

The BLUE SEA 7057-BSS circuit breaker is designed to protect marine electrical circuits from overcurrents. It acts as a safety device that interrupts the current flow when it detects an overload or short circuit, preventing damage to equipment and cables. Unlike a fuse, it can be manually reset after resolving the issue, eliminating the need to replace consumables.

This circuit breaker features quick-connect terminals (typically fork terminals or 'spade terminals') that simplify integration into electrical systems. It is designed for panel mounting. Installation involves connecting the power and load cables to the breaker's appropriate terminals. It is recommended to ensure wiring complies with marine standards and that wire gauge is suitable for the 20-amp rating for optimal safety.

Yes, this BLUE SEA thermal circuit breaker is compatible with marine DC electrical systems, typically 12V, 24V or even 32V DC. It is specifically designed for protecting auxiliary circuits and low to medium power equipment in a marine environment.

The 'reset-only push button' function means the circuit breaker trips automatically when an overcurrent or short circuit is detected, thereby cutting off the circuit. Once the cause of the trip has been identified and corrected, the user can manually reset the breaker by pressing its button. There is no lever to manually turn it on or off before a trip; its function is purely protective and resets after an event.

This 20-amp circuit breaker is ideal for protecting secondary circuits and individual equipment requiring up to 20A protection. It is particularly suitable for:

Auxiliary circuitsBattery lightingIsolated navigation equipmentSmall to medium bilge pumpsAccessory power outletsIts compact design allows installation in confined spaces, and its fast reset capability makes it a practical alternative to traditional fuse holders for these applications.