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The OptiFuse CBW57-ES-4A is a thermal circuit breaker designed for reliable overcurrent protection. It offers a current rating range of 3A to 30A, with this specific model rated at 4A. The breaker supports input voltages of up to 250 VAC and 50 VDC, operating at frequencies of 50-60 Hz.
Key electrical specifications include a dielectric strength greater than 1500 VAC and an insulation resistance exceeding 100MΩ at 500 VDC. The contact endurance is rated for 500 cycles at 125 VAC with 150% of the rated current. Reset time is within 60 seconds.
This circuit breaker features a push-to-reset actuator and a panel mount design for easy integration into control panels. The operating ambient temperature range is -10°C to +60°C. It is also marine ignition protected according to SAE J1171 and UL1500 standards.
The CBW57-ES-4A is rated for 250 VAC and 32/50 VDC.
The continuous current rating is 4A.
The operating ambient temperature range is -10°C to +60°C.
The interrupt rating is 1000A at 125/250 VAC for 3-30A, 400A at 125/250 VAC for 3-20A, and 300A at 50 VDC for 3-30A.
The breaker resets within 60 seconds after tripping via the push-to-reset actuator.
Yes, it is marine ignition protected per SAE J1171 and UL1500.
The dielectric strength is greater than 1500 VAC for 1 minute.