Littelfuse, Inc. announced the launch of the TPSMB Asymmetrical Series TVS Diodes (TPSMB2412CA, TPSMB2616CA, TPSMB2818CA, TPSMB3018CA). These first-to-market devices are specifically designed for 12V battery anti-reverse protection, delivering superior performance compared to traditional symmetrical bi-directional TVS solutions. (View the video.)
Unlike conventional approaches that often require multiple components, the TPSMB Asymmetrical Series provides a single-component solution that protects anti-reverse MOSFETs, diodes, and DC/DC converter ICs from both positive and negative surges. The asymmetrical clamping capability ensures much lower clamping voltage from negative surges, allowing engineers to select lower-rated MOSFETs or diodes. This approach reduces conduction losses, simplifies design, and lowers overall BOM costs.
Key features and benefits
• Asymmetrical protection with low positive clamping (24–30 V) and low negative clamping (12–18 V)
• Single device replaces multiple Zeners/TVS diodes, streamlining PCB design
• High performance: 600W peak pulse power, <1 ns response time, and up to 30kV ESD dissipation
• Automotive qualified: AEC-Q101 compliant with a wide -65 to 175°C junction temperature range
• Compact design: DO-214AA surface-mount package optimises board space
Applications
The TPSMB Asymmetrical Series is ideal for a broad range of automotive applications requiring 12V battery anti-reverse protection, including:
• Domain and zonal controllers
• Body control modules (BCMs)
• Infotainment and lighting systems
• ECUs and power seats
• Motor pre-tensioner safety belts
• ADAS systems
“The TPSMB Asymmetrical Series delivers the industry’s first single-component solution specifically engineered for 12V battery anti-reverse protection,” said Charlie Cai, Director Product Marketing at Littelfuse. “By enabling customers to use lower-voltage MOSFETs or diodes, these devices reduce conduction loss, simplify circuit design, and lower BOM cost while ensuring reliable automotive system protection.”
With the launch of the TPSMB Asymmetrical Series, Littelfuse expands its automotive protection portfolio to address the evolving requirements of 12V battery systems in modern vehicles.
