Littelfuse, Inc. announced the TPSMB Asymmetrical Series TVS Diodes (TPSMB2412CA, TPSMB2616CA, TPSMB2818CA, TPSMB3018CA), designed for 12-V battery anti-reverse protection used across vehicle electrical architectures, including electric vehicles (EVs).
Although EVs rely on high-voltage propulsion systems, they continue to use extensive 12-V subsystems for domain controllers, body electronics, ADAS modules, infotainment, and safety functions. These circuits require reliable protection from positive and negative surges.
The TPSMB Asymmetrical Series provides a single-component solution that protects anti-reverse MOSFETs, diodes, and dc/dc converter ICs. Its asymmetrical clamping behavior offers significantly lower negative clamping voltage compared to symmetrical bi-directional TVS devices.
This allows engineers to choose lower-voltage MOSFETs or diodes, which reduces conduction losses and simplifies overall circuit design.
Features
- Asymmetrical protection with low positive clamping (24–30 V) and low negative clamping (12–18 V)
- Single device can replace multiple Zener or TVS diodes
- 600 W peak pulse power, <1 ns response time, and up to 30-kV ESD dissipation
- AEC-Q101 qualified, with a junction temperature range of -65° to 175° C
- DO-214AA surface-mount package for compact PCB layout
Applications
The TPSMB Asymmetrical Series supports protection needs across 12-V systems in both EV and ICE platforms, including:
- Domain and zonal controllers
- Body control modules
- Infotainment and lighting systems
- ECUs and power seats
- Motor pre-tensioner safety belts
- ADAS components
With this series, Littelfuse expands its automotive protection portfolio for 12-V battery subsystems that remain essential across modern vehicle platforms, including battery-electric architectures.
Filed Under: Power Electronics, Technology News