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Littelfuse 0.4 A Resettable Fuse 72V Radial Lead RXEF040
Specifications
| Country of Origin | India |
|---|---|
| Voltage | 72V |
| Brand | Littelfuse |
| Height | 13.5mm |
| Length | 7.6mm |
| Model | RXEF040 |
| Width | 3mm |
| Current Rating | 40A |
| Series | RXEF |
| Maximum Operating Temperature | 60°C |
| Minimum Operating Temperature | -40°C |
| Trip Current | 800mA |
| Power Dissipation | 0.56W |
| Standards/Approvals | RoHS, TUV, UL, CQC, CSA |
| Time to Trip | 3.8s |
| Hold Current | 0.4A |
| Minimum Resistance | 0.55Ω |
| Maximum Resistance | 1.29Ω |
| Lead Orientation | Radial |
Key Features
- Automatically resets thousands of times without replacement need.
- Compact radial lead design for easy PCB mounting.
- Trip current of 800mA with 3.8 second trip time for rapid response.
- Power dissipation rating at 0.56W ensures reliable operation under normal loads.
- Wide operating temperature range from -40°C to 60°C suitable for varied environments.
- RoHS compliant and halogen free for environmental safety.
- Approved to standards including TUV, UL, CQC, and CSA for assured quality.
- Designed for protection in printers, industrial controls, and telecommunications equipment.
Product Description
Littelfuse RXEF040 resettable fuse is a high-reliability circuit protection device designed for low hold current applications up to 0.4A and voltage ratings of 72V. Featuring PolySwitch™ RXE technology, this fuse offers fast trip response with a trip current of 800mA and a time-to-trip of 3.8 seconds. Its radial lead orientation facilitates easy installation on printed circuit boards.
Engineered with a compact form factor measuring 7.6mm in length, 13.5mm in height, and 3mm in width, the RXEF040 is suited for space-constrained electronics such as printers, modems, game machines, and medical equipment. The fuse rapidly switches from low resistance to a high resistance state under overload, providing automatic circuit protection and resetting itself once the fault is cleared and power restored.
Designed to operate reliably in harsh ambient conditions, this device supports a temperature range of -40°C to 60°C. Its power dissipation of 0.56W ensures stable functionality under load. Additionally, the fuse complies with RoHS directives and is halogen free, aligning with environmental safety regulations.
With approvals from TUV, UL, CQC, and CSA, the Littelfuse RXEF040 resettable fuse meets global quality and safety standards. This fuse is maintenance free and eliminates the need for replacement, reducing system downtime.
Automatically resets thousands of times without replacement requirement. Compact radial lead design ideal for PCB mounting. Trip current 800mA for swift circuit protection. Power dissipation rated at 0.56W for efficient operation.
Broad operating temperature range from -40°C up to 60°C. Environmental compliance with RoHS and halogen-free materials. Certified by TUV, UL, CQC, and CSA for quality assurance. Applicable in printers, industrial controls, medical equipment, and telecommunications.
Small size for space-saving design in electronic assemblies.
This Littelfuse Resettable Fuse is a trusted component for protecting electrical and electronic circuits against excessive current conditions in industrial, telecommunications, automotive, and consumer electronic applications. Browse more high-quality Littelfuse protection devices on EnvMart to find solutions tailored to your specific requirements.
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Frequently Asked Questions
The trip current of the RXEF040 is 800mA, allowing for rapid circuit protection.
This model operates within a temperature range of -40°C to 60°C, making it suitable for various environments.
The dimensions of the RXEF040 are 7.6mm in length, 13.5mm in height, and 3mm in width.
The power dissipation rating is 0.56W, ensuring reliable operation under normal loads.
It is approved to standards including RoHS, TUV, UL, CQC, and CSA, ensuring quality and safety.
Under overload conditions, it rapidly switches from low resistance to a high resistance state, providing automatic circuit protection and resetting once the fault is cleared.
The hold current rating of the RXEF040 is 0.4A, suitable for low hold current applications.
The time to trip for this resettable fuse is 3.8 seconds, allowing for swift circuit response.
This model features a radial lead orientation, facilitating easy installation on printed circuit boards.
It is designed for protection in printers, industrial controls, medical equipment, and telecommunications equipment.
The RXEF040 is manufactured in India.
The minimum resistance is 0.55Ω and the maximum resistance is 1.29Ω, which affects its operation under load.
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