Littelfuse 0.5 A Resettable Fuse 32V dc AHEF050

Littelfuse AHEF050 resettable fuse is a specialized automotive-grade PolySwitch® PTC device rated for 0.5 A hold current and 32V dc voltage operation. Designed under the PS400 specification derived from the AEC-Q200 automotive standard, this fuse offers reliable overcurrent and overvoltage protection for electronic circuits used in automotive telematics, infotainment systems, and LCD back-light heaters.

The compact radial lead configuration supports high-volume electronics assembly and PCB mounting, enabling efficient space utilization. This fuse automatically resets itself thousands of times, eliminating the need for fuse holders or replacements, thus reducing maintenance efforts.

Typical applications include motor circuit protection for power door locks, mirrors, lumbar pumps, seats, sunroofs, and window controls. The device also safeguards HVAC and cooling fan systems from electrical overloads and short circuits by rapidly switching from a low resistance state to a very high resistance state when faults occur, then returning to normal operation upon fault clearing and power removal.

Manufactured to meet RoHS compliance and certified by UL, CSA, and TUV, the AHEF050 provides a power dissipation capacity of 0.9W while operating within a temperature range of -40°C to 60°C. Its minimum and maximum resistances are 0.35Ω and 1.1Ω, respectively, ensuring stable circuit protection.

This resettable fuse is essential for automotive, medical, instrumentation, control, and audiovisual electronic devices requiring rapid and reliable circuit protection. Its robust design and quality assurance make it suitable for industrial assembly and demanding operational environments.

Automatic resetting after fault clearance ensures maintenance-free operation. Compact radial lead design enables easy PCB mounting and space saving. Meets RoHS standards indicating environmentally responsible manufacturing.

Specifically qualified for automotive applications per AEC-Q200 derived PS400 specification. Designed for use in telematics, infotainment, LCD back-light heaters, and motor protection. Power dissipation limited to 0.9W for energy-efficient operation.

Reliable protection for HVAC systems, cooling fans, and power outlets. Operating temperature range from -40°C to 60°C suits varied environments. Rapid transition from low to high resistance upon overload or short circuit.

Factory tested for quality with approvals from UL, CSA, and TUV. Explore more in our category of Resettable Fuses to choose the right circuit protection device for your industrial and electronic assembly needs.