Snapback TVS diodes have 1.0 to 1.05 clamping ratio

Discretes manufacturer Taiwan Semiconductor has introduced the first product in its new series of SUPER CLAMP Snapback TVS devices. SUPER CLAMP TVS diodes have snapback characteristics featuring a superior 1.0 to 1.05 clamping ratio between the designated breakdown voltage and clamping voltage.

The lower clamping voltage of the optimized snapback TVS protects the circuit at a much higher peak pulse current than conventional TVS diodes. This enables designers to use lower-working-voltage and less costly components (capacitors, switching MOSFETs, reverse polarity protection diodes and regulators) while still maintaining proper design margins.

The first in the new series of SUPER CLAMP snapback TVS devices is the 24V LTD7524CAH. (Smaller, lower-power, traditional SMB and SMC AEC-Q–qualified devices will follow inQ2/2025.) The new 24V snapback TVS device provides a peak power rating of 7700W and is designed to clamp repetitive (10/1000µs) transients of up to 300V peak, which is nearly twice that of comparable standard TVSs.

With a temperature rating of -55C to 175C, the DO-218AB–packaged SUPER CLAMP diodesmeet AEC-Q101 automotive qualification and ISO7637. Suitable for any transient protection application working at 24V or greater, the SUPER CLAMP snapback TVS is ideal for hybrid electric vehicle 48V buses, battery management systems and chargers, alternators, lighting protection, telecom/datacom/networking 36–72-volt rails, EMP protection systems, industrial process controls and avionics.

SUPER CLAMP snapback TVS diodes provide the flexibility to combine with conventional TVS diodes in series, allowing for different working voltages while delivering high peak surge current and enhanced protection. Moreover, as a bidirectional device, they are suitable for DC or AC applications.

“Our new SUPER CLAMP advanced snapback TVS devices offer a superior approach to using conventional TVS devices when designers need to reduce system bus transient voltage stress,”said Sam Wang, vice president, TSC Products. “Thanks to their exceptional protection characteristics, they also help them avoid overdesign—which can cut system costs.”