SA78CA – 78 V 500 W Bi-Directional TVS Diode | DO-15 | Industrial & High-Voltage Line Surge Protector SEP

The SA78CA is a 78 V, 500 W bi-directional TVS diode engineered to safeguard high-voltage industrial rails, communication interfaces, instrumentation circuits, and control systems from severe transient surges. Its symmetrical avalanche breakdown ensures stable clamping in both polarities during voltage spikes, inductive load switching, and ESD events.

Key Specifications

• VRWM: 78 V

• VBR: 86.7 – 95.7 V

• VC: 126 V

• Peak Pulse Power: 500 W

• Package: DO-15

• Response Time: < 1 ns

Applications

• Industrial automation and PLC protection

• High-voltage sensor and communication lines

• Protection for 72–75 V power rails

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

• Telecom, metering, and infrastructure electronics

Features

• 500 W peak pulse capability

• Bi-directional avalanche clamping

• <1 ns ultra-fast response time

• Glass-passivated DO-15 package

• Low leakage with stable avalanche characteristics