CIRCUIT PROTECTION Littelfuse launches TPSMD-FL TVS diodes for simplified load-dump protection

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Littelfuse, Inc. has announced the TPSMD-FL Series FlatSuppressX TVS Diodes, a new family of automotive-grade transient voltage suppression devices designed to simplify ISO 7637-2 Pulse 5b load-dump protection for 12 V vehicle electronics.

Unlike conventional TVS diodes that can allow transient voltages to rise to levels requiring additional protection circuitry, the TPSMD-FL Series leverages proprietary FlatSuppressX technology to maintain a low, flat, and stable clamping voltage profile during high-energy transient events. This enables designers to meet demanding automotive load-dump requirements with lower clamping fewer external components, reducing design complexity, PCB space requirements, and total system cost.

Rated for 3000 W peak pulse power dissipation and housed in a compact surface-mount DO-214AB package, the TPSMD-FL Series is optimized to protect sensitive automotive electronics from high-energy surges. The devices are AEC-Q101 qualified and designed specifically for applications requiring compliance with ISO 7637-2 Pulse 5b load-dump standards.

"Automotive designers continue to face the challenge of protecting increasingly sensitive electronics from high-energy load-dump transients without adding cost and complexity to their systems," said Charlie Cai, Director of Product Management, Protection Business, Littelfuse. "The innovative FlatSuppressX TPSMD-FL Series addresses this challenge by delivering exceptionally low clamping voltage performance that can help systems meet ISO 7637-2 Pulse 5b requirements without requiring additional protection devices, reducing both component count and overall BOM cost."

BASIC KNOWLEDGE

The current “speed breaker”

The main features and benefits include

• Excellent low-clamping performance

• FlatSuppressX technology with advanced foldback I-V characteristics that maintain a low, stable clamping voltage during transient events

• 3000 W peak pulse power dissipation capability for robust surge protection

• Designed to withstand ISO 7637-2 Pulse 5b load-dump transients in 12 V automotive systems

• AEC-Q101 qualification for automotive reliability requirements

• Compact DO-214AB surface-mount package that helps optimize board space

• IEC 61000-4-2 ESD protection up to 30 kV air and contact discharge

The TPSMD-FL Series is ideal for automotive applications requiring protection from load-dump transients, including zonal control modules, powertrain electronics, infotainment systems, body control modules, and other vehicle electronic subsystems operating on 12 V power networks.

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