Littelfuse Launches High-Voltage TPSMC,TPSMD, TP5.0SMDJ TVS Diodes for Automotive Power Protection

ROSEMONT, Ill, April 28, 2026 -- Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy, today 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.

The TPSMC, TPSMD, and TP5.0SMDJ Automotive-Grade Series TVS Diodes are available in tape and reel format in quantities of 3,000. Sample requests are accepted through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit Littelfuse.com.

Source: Press Release 

Key Features 

• High-standoff voltage (≥400 V) enables single-device protection in high-voltage automotive circuits

• Peak-surge current up to 300 A and peak pulse power up to 5 kW, 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 minimizes 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

Applications

• Automotive electronics

• Battery Disconnect Units (BDU)

• High-voltage HVAC compressors

• PTC cabin and battery heaters

• High-voltage DC power distribution