SA120CA – 120 V 500 W Bi-Directional TVS Diode | DO-15 | Industrial & High-Voltage Surge Protector SEP

The SA120CA is a 120 V, 500 W bi-directional TVS diode designed to protect high-voltage AC/DC systems, industrial electronics, automation equipment, and communication interfaces from damaging transient surges. Its symmetrical avalanche breakdown ensures reliable clamping in both polarities during spikes, inductive load switching, and ESD events.

Key Specifications

• VRWM: 120 V

• VBR: 133 – 147 V

• VC: 193 V

• Peak Pulse Power: 500 W

• Package: DO-15

• Response Time: < 1 ns

Applications

• High-voltage industrial automation and PLC systems

• Communication line and instrumentation protection

• SMPS and DC-DC converter high-voltage front-end protection

• Relay, actuator, and motor control circuitry

• High-voltage sensor interface surge suppression

Features

• 500 W peak pulse capability

• Bi-directional clamping for AC and DC circuits

• Ultra-fast transient response (<1 ns)

• Rugged glass-passivated DO-15 package

• Stable avalanche characteristics with low leakage