Littelfuse launcheses TPSMC,TPSMD,TP5.0SMDJ TVS diodes

Littelfuse, Inc. announced the launch of its TPSMC, TPSMD, and TP5.0SMDJ high-voltage transient voltage suppression (TVS) diode series, expanding the TP Series portfolio with devices specifically engineered for automotive high-voltage power electronics applications including battery disconnect units (BDUs), high-voltage HVAC systems, and positive temperature coefficient (PTC) heaters.

As electrified vehicle architectures migrate toward higher voltages and wide bandgap semiconductors, power devices such as GaN/SiC MOSFETs and IGBTs are increasingly exposed to severe voltage transients from load dumps, inductive switching, and other high-energy events. Traditional low- and mid-voltage TVS solutions often require multiple devices in series to achieve sufficient protection, thereby increasing PCB area, complexity, and bill of materials (BOM) costs.

The new TPSMC, TPSMD, and TP5.0SMDJ high-voltage TVS diodes address this challenge by delivering higher standoff voltages – up to 400 V – and high peak pulse power in a single automotive-grade device, enabling engineers to simplify protection schemes while improving system efficiency and robustness.

Key features and benefits

High standoff voltage (≥400 V) enables single-device protection in high-voltage automotive circuits
Peak surge current up to 300A and peak pulse power up to 5kW, supporting harsh transient conditions
Fast response time (typically <1 ps) for effective transient clamping
AEC-Q101 qualified and PPAP capable for automotive reliability requirements
DO-214AB (SMC) surface-mount package minimise PCB footprint and simplifies layout
IEC-61000-4-2 ESD compliance (up to 30 kV) for robust system-level protection
Reduced BOM cost and component count compared to multi-device protection approaches

Designed for high-voltage automotive power systems

The TPSMC, TPSMD, and TP5.0SMDJ series is first-to-market in offering TVS diodes purpose-built for emerging high-voltage automotive subsystems, allowing designers to:

Reduce the number of TVS devices required in series
Optimise selection of lower-rated GaN/SiC MOSFETs or IGBTs to reduce conduction losses
Improve overall system efficiency while lowering cost

“These high-voltage TVS diodes were developed specifically for next-generation automotive power architectures,” said Charlie Cai, Director of Product Marketing, Littelfuse. “By enabling single-device transient protection in BDU, HVAC, and PTC applications, our customers can simplify designs, reduce BOM cost, and even select lower-rated power semiconductors to improve efficiency and system performance.”