Littelfuse, announced the launch of its TPSMC, TPSMD, and TP5.0SMDJ high-voltage transient voltage suppression (TVS) diode series. The new devices expand the TP Series portfolio and are designed 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 shift toward higher voltages and wide-bandgap semiconductors, power devices such as GaN/SiC MOSFETs and IGBTs face increased exposure to voltage transients from load dumps, inductive switching, and other high-energy events. Traditional low- and mid-voltage TVS solutions often require multiple devices connected in series to reach adequate protection levels, which increases PCB area, complexity, and bill of materials (BOM) costs.
The TPSMC, TPSMD, and TP5.0SMDJ series provide higher standoff voltages of up to 400 V and high peak pulse power in a single automotive-grade device. This configuration enables simplified protection schemes in high-voltage automotive circuits.
Key features include:
- High-standoff voltage (≥400 V) for single-device protection
- Peak-surge current up to 300 A and peak pulse power up to 5 kW
- Fast-response time (typically <1 ps)
- AEC-Q101 qualified and PPAP capable
- DO-214AB (SMC) surface-mount package
- IEC-61000-4-2 ESD compliance (up to 30 kV)
- Reduced BOM cost and component count compared to multi-device approaches
The series is offered in unidirectional and bidirectional configurations. Differences between the models are as follows:
- TPSMD: 180-400 V, 3000 W peak pulse power
- TPSMC: 300-540 V, 1500 W peak pulse power
- TP5.0SMDJ: 5000 W peak pulse power
The devices are intended for use in automotive electronics, specifically battery disconnect units (BDU), high-voltage HVAC compressors, PTC cabin and battery heaters, and high-voltage DC power distribution. They are optimized to protect GaN/SiC MOSFETs and IGBTs in these systems.
Charlie Cai, Director of Product Marketing at Littelfuse, stated that the high-voltage TVS diodes were developed for next-generation automotive power architectures. He noted that single-device transient protection in BDU, HVAC, and PTC applications allows customers to simplify designs, reduce BOM cost, and select lower-rated power semiconductors to improve efficiency and system performance.
The TPSMC, TPSMD, and TP5.0SMDJ series are available in tape and reel packaging in quantities of 3,000. Samples can be requested through authorized Littelfuse distributors worldwide.
