P4KE9.1CA – 9.1 V 400 W Bi-Directional TVS Diode | DO-41 | Industrial & Telecom Surge Protector SEP

The P4KE9.1CA is a 9.1 V, 400 W bi-directional TVS diode designed to protect low-voltage AC/DC rails, industrial automation systems, telecom lines, and sensitive electronics from high-energy transient events. Its fast avalanche response and controlled breakdown in both polarities ensure reliable clamping during load-dump, inductive switching, and voltage spikes.

Key Specifications

• VRWM: 8.2 V

• VBR: 9.55–10.45 V

• VC: 15.2 V

• Peak Pulse Power: 400 W

• Package: DO-41

• Response Time: < 1 ns

Applications

• Low-voltage AC/DC power line protection

• Industrial automation and PLC surge suppression

• Telecom and communication line transient protection

• SMPS and DC/DC converter front-end protection

• Microcontroller and sensor interface safeguarding

Features

• 400 W peak pulse energy capability

• Bi-directional clamping for AC and DC circuits

• Ultra-fast avalanche response (< 1 ns)

• Rugged, long-life DO-41 axial package

• Low leakage current with stable breakdown characteristics