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Littelfuse Corporation (NASDAQ: LFUS) is an industrial technology manufacturing company dedicated to powering a sustainable, connected and safer world. The company recently announced the launch of the 5.0SMDJ-FB transient suppression diode series, featuring a 5000W surface mount solution in a DO-214AB package, designed to protect sensitive DC power lines from overvoltage transients.

The new series adopts flip-back technology. Compared with traditional solutions, the clamping voltage (VC) can be reduced by 15%, while the breakdown voltage (VBR) is maintained at a level higher than the reverse rated voltage (VR). This key differentiating factor ensures reliable protection for increasingly sensitive downstream components, especially the next-generation DC/DC converters, without affecting system integrity.

The 5.0SMDJ-FB series addresses a key design challenge: how to protect increasingly sensitive DC/DC converters and other power components from destructive transient surges. Jenny Chen, product manager of Littelfuse's Protection Semiconductor Business Unit, said. "By achieving up to 15% clamping voltage reduction at the same rated voltage, our flip-back technology enhances the circuit protection performance of high-reliability applications such as data centers and industrial systems." "

The main functions and advantages of the 5.0SMDJ-FB series include:

Return-back technology: It can reduce the clamping voltage and enhance protection against electrical fast transients (EFT), electrostatic discharge (ESD), and other overvoltage conditions.

The breakdown voltage (VBR) is always greater than the reverse off-state voltage (VR), making it highly suitable for maintaining the stability of DC power lines.

With a peak pulse rated power of 5000 W, it can provide strong protection in harsh electrical environments.

A direct alternative to the traditional 5.0SMDJ series, it features the same compact DO-214AB (SMC) form factor.

These devices can protect DC power lines in various demanding applications, including

Power over Ethernet (PoE) system

AI and data center servers;

ICT equipment power supply;

Industrial DC power distribution.

As system design continues to evolve, including higher-performance and more compact DC/DC converters, the risk of transient failures also increases. The 5.0SMDJ-FB series offers design engineers a solution that combines compact size, easy integration and advanced protection performance to meet these demands.

Supply situation

5.0SMDJ-FB transient suppression diodes are available in tape packages with a minimum order quantity of 3,000 pieces. Sample requests are accepted through globally authorized Littelfuse distributors. For the list of Littelfuse authorized dealers, please visit Littelfuse.com.

For more information

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