New automotive-grade TVS diodes reduce BOM cost while protecting GaN/SiC MOSFETs and IGBTs in BDU, HVAC, and PTC systems
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. (View the video in English, Chinese & Japanese.)
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 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
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
- Optimize 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.”
TPSMC, TPSMD, and TP5.0SMDJ Series Overview
- Compact high-voltage TVS for dense layouts
- Higher surge and power capability
- Extended high-voltage protection
| Series | Voltage Range | Peak Pulse Power | Key Advantages | Tyical Use |
|---|---|---|---|---|
| TPSMD | 180-400 V | 3000 W |
|
|
| TPSMC | 300-540 V | 1500 W | ||
| TDB06 | 6 | 8.75 |
All series are available in unidirectional and bidirectional configurations.
Markets and Applications
- Automotive electronics
- Battery Disconnect Units (BDU)
- High-voltage HVAC compressors
- PTC cabin and battery heaters
- High-voltage DC power distribution
FAQs – High-Voltage TPSMC, TPSMD, and TP5.0SMDJ TVS Diodes
- Why use high-voltage TVS diodes instead of traditional TVS solutions?
High-voltage TVS diodes provide sufficient standoff voltage in a single device, eliminating the need for multiple low-voltage devices in series. This reduces PCB area, cost, and design complexity.
- Which power semiconductors are these TVS diodes designed to protect?
They are optimized for protecting GaN/SiC MOSFETs and IGBTs used in high-voltage automotive power electronics.
- What automotive standards do these devices meet?
The TPSMC, TPSMD, and TP5.0SMDJ series are AEC-Q101 qualified, PPAP capable, and compliant with IEC-61000-4-2 ESD requirements.
- What are the differences between the TPSMB, TPSMD, and TP5.0SMDJ series?
TPSMC supports 1500 W, TPSMD supports 3000 W, while TP5.0SMDJ supports 5000 W peak pulse power.
- Are these TVS diodes compatible with existing Littelfuse designs?
Yes. They are designed to integrate seamlessly with existing Littelfuse TVS and circuit protection portfolios.
Availability
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.
For More Information
Additional information is available on the TPSMC, TPSMD, and TP5.0SMDJ product page. To contact Charlie Cai for technical support, please visit the Littelfuse website or reach out to Charlie directly at CCai@littelfuse.com.
About Littelfuse
Littelfuse, Inc. (NASDAQ: LFUS) is an industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy. Across more than 20 countries, and with approximately 16,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation, and electronics end markets–everywhere, every day. Learn more at Littelfuse.com.