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High-Surge-Rating SMD TVS Diodes Delivers Superior Protection Against Lightning Strikes and Other Transient Surges for Power Supply Applications

SMTOAK2 TVS Diode Series
SMTOAK2 TVS Diode Series

Littelfuse, Inc. has introduced the new SMTOAK2 TVS Diode Series that allows electronics designers to achieve a more robust transient voltage, overvoltage protection, and lightning protection system while using less printed circuit board (PCB) space. This compact, 2 kA 8/20 μs rated, surface-mount package SMTOAK2 TVS Diode Series is ideal for high-power-density applications that require robust protection in a small footprint, including ICT, Medical, Industrial DC power supplies; high-power DC bus protection; DC power supplies used in exposed and harsh environments; power over ethernet (PoE) ports; small cell, micro cell, remote radio units (RRU), baseband units (BBU); and high-power density SiC and GAN-based DC/DC converters/power supplies.


This TVS Diode Protects high-cost, high-current, high-speed MOSFET/IGBT circuits against inductive kicks with low-clamping voltage and high-surge rating and enables designers to achieve robust circuit protection with less PCB space via a modified, compact SMTO-263 surface-mount package 50% smaller than SMTO-218 surface-mounted solutions. Moreover, it is compatible with automated PCB assembly processes reducing costs while saving time.



  • Glass passivated chip junction in modified TO- 263 package

  • ESD protection of data lines in accordance with IEC 61000-4-2, 30 kV(Air), 30 kV (Contact)

  • Fast response time: typically less than 1.0 ps from 0 Volts to VBR min

  • Excellent clamping capability

  • Low incremental surge resistance

  • UL Recognized compound meeting flammability rating 94V-0

  • Meets MSL level 1, per J-STD-020, LF maximun peak of 260°C

  • For surface mounted applications to optimize board space

  • Low profile package

  • High temperature reflow soldering guaranteed: 260°C/10 sec at terminals



  • ICT, Medical, Industrial DC power supplies

  • High-power DC bus protection

  • DC power supplies used in exposed and harsh environments

  • Power over ethernet (PoE) ports

  • Small cell, micro cell, remote radio units (RRU), baseband units (BBU)

  • High-power density SiC and GAN-based DC/DC converters/power supplies

Component Datasheet

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