SA120A – 120.0 V 500 W Uni-Directional TVS Diode | DO-15 | Industrial & Power-Line Surge Protector SEP

SEP

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The SA120A is a 120 V, 500 W uni-directional TVS diode designed to protect industrial DC rails, automation controllers, relay and motor drivers, and communication interfaces from high-energy transient surges. Its fast avalanche response and controlled breakdown voltage ensure reliable clamping during voltage spikes, inductive switching, and load-dump events.

Key Specifications

  • VRWM: 102.0 V

  • VBR: 114.0–126.0 V

  • VC: 193 V

  • Peak Pulse Power: 500 W

  • Package: DO-15

  • Response Time: < 1 ns

Applications

  • Industrial DC bus and PLC protection

  • Motor, solenoid, and relay surge suppression

  • SMPS and DC/DC converter input protection

  • Sensor and communication line safeguarding

  • Automation and control system protection

Features

  • 500 W peak pulse energy absorption capability

  • Uni-directional avalanche clamping for DC rails

  • Ultra-fast transient response (<1 ns)

  • Rugged glass-passivated DO-15 package

  • Low leakage and stable breakdown voltage