SA85A 85.0 V 500 W Uni-Directional TVS Diode | DO-15 | Industrial & Power-Line Surge Protector HORNBY

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The SA85A is an 85 V, 500 W uni-directional TVS diode designed for protecting industrial DC rails, automation modules, sensors, and power-control systems against high-energy transient surges. Its fast avalanche response and controlled breakdown characteristics ensure reliable clamping during voltage spikes, inductive load switching, and electrical disturbances.

Key Specifications

  • VRWM: 68.4 V

  • VBR: 81.089.0 V

  • VC: 137 V

  • Peak Pulse Power: 500 W

  • Package: DO-15

  • Response Time: < 1 ns

Applications

  • Industrial DC bus surge protection

  • Relay, motor, and solenoid driver suppression

  • Automation and control equipment protection

  • SMPS and DC/DC converter front-end protection

  • Sensor and communication line safeguarding

Features

  • 500 W peak pulse transient capability

  • Fast uni-directional avalanche clamping

  • Ultra-fast response (<1 ns)

  • Robust glass-passivated DO-15 package

  • Low leakage current with stable breakdown voltage