SA18CA – 18 V 500 W Bi-Directional TVS Diode | DO-15 | Industrial & Communication Line Surge Protector SEP

The SA18CA is an 18 V, 500 W bi-directional TVS diode designed to protect low-voltage industrial, communication, sensor, and control circuits from high-energy transients. Its symmetrical avalanche design ensures consistent clamping in both polarities, providing dependable protection against spikes, ESD, and inductive switching events.

Key Specifications
VRWM: 15.30 V
VBR: 17.10–18.90 V
VC: 25.2 V
Peak Pulse Power: 500 W
Package: DO-15
Response Time: < 1 ns

Applications
Industrial control and PLC systems
Communication and sensor line protection
SMPS and DC-DC front-end protection
Low-voltage power rail surge suppression
Microcontroller and logic interface protection

Features
500 W peak pulse capability
Bi-directional avalanche clamping
Ultra-fast response (<1 ns)
Rugged DO-15 glass-passivated package
Stable VBR with low leakage current