043803.5WRA

043803.5WRA Application Field and Working Principle

043803.5WRA is a medium-performance dual-element time-delay fuse producing by Littelfuse. This fast-acting fuse offers reliable protection for most of the application. It is suitable for motor branch, motor disconnect, pump motor service, and HVAC control circuits. In the meantime, it can provide quick response to ground fault interruptions.

General Specifications

• Amp rating: 3.5A
• Volts rating: 600VAC/300VDC
• Interrupting rating: 200A at 600VAC/100A at 30VDC
• Time delay: 10 sec. @ 500% Amp rating
• Size: 1.625" x 0.75"
• Approvals: UL, CSA

Working Principle

043803.5WRA fuses consist of two elements that differs in their physical size and time-delay characteristics. The first element is a small, current-responsivend element that offers low current protection. It will prevent the overloaded circuit from damaging and provides better hold immunity characteristics from the transformer’s in-rush current during power-on. The other element is the large, time-delay element, which serves as a supplementary protection against low-level ground fault and can offer overcurrent protection against short-circuit overload.

Typical Applications

043803.5WRA fuses are used in many industrial and commercial applications. Its quick response to ground fault interruptions make them suitable for motor branch, motor disconnect, pump motor service, and HVAC control circuits. Both the UL and CSA approved can guarantee their reliability, as well as the satisfaction and safety of customers.

Advantages

• High performance dual-element fuse to satisfy different current protection requirements
• Fast response in shorcircuit and ground fault protection
• Safe and reliable
• Variety applications with UL/CSA approved