Optifuse 641, 642, and 643 Mid-Amp Circuit Breakers Marine-Rated
Optifuse 641, 642, and 643 mid-amp circuit breakers are compact circuit protection devices designed for electrical systems in marine, RV, truck, and emergency vehicle applications. The series provides branch circuit protection in environments where moisture, vibration, and confined installation spaces are common.
The 641, 642, and 643 models share a waterproof, ignition-protected construction suitable for marine engine compartments and other harsh operating conditions. Their compact footprint supports installation in tight spaces while maintaining compliance with marine and vehicle electrical standards. The breakers meet SAE J1171, SAE J553, and ABYC branch circuit protection requirements.
The 641 automatic reset circuit breaker restores circuit protection automatically after an interruption, supporting applications where minimizing downtime is important. It is rated for 32V DC operation and mid-range amperage from 10 to 60 A. The breaker has a 2,500 A DC interrupt rating to support protection during high fault current events.
The 642 manual reset circuit breaker allows circuits to be restored only after a user-initiated reset, supporting applications that require a controlled restart after a fault condition. It shares the same marine-rated, ignition-protected housing as the 641 and conforms to the SAE J553 standard for performance consistency in vehicle and marine systems.
The 643 manual reset push-to-trip circuit breaker includes a push-to-trip function that allows manual testing of circuit operation. It supports amperage ratings up to 60 A and uses the same compact, marine-rated housing design for use in wet or rugged environments.
Together, the 641, 642, and 643 mid-amp circuit breakers provide standardized circuit protection across a range of vehicle and marine electrical systems while supporting multiple reset and testing preferences.
Features:
- Mid-amp circuit protection for vehicle and marine electrical systems
- Waterproof and ignition-protected construction
- Marine-rated design for harsh operating environments
- Automatic reset option on model 641
- Manual reset option on model 642
- Manual reset with push-to-trip testing on model 643
- Operating voltage rated at 32V DC
- Amperage ratings from 10 to 60 A
- 2,500 A DC interrupt rating
- Compliance with SAE J1171, SAE J553, and ABYC requirements
- Compact footprint for installation in limited spaces
Optifuse
El Cajon, CA
(619) 593-5050
[email protected]
optifuse.com