P4KE440A 440 V 400 W Uni-Directional TVS Diode | DO-41 | Industrial & Telecom Surge Protector HORNBY

The P4KE440A is a 440 V, 400 W uni-directional TVS diode designed to protect 430440 V DC rails, industrial automation equipment, telecom power lines, and sensitive electronic modules from high-energy transient events. Its fast avalanche response and controlled breakdown range ensure reliable clamping during load-dump events, inductive switching spikes, and lightning surges.

Key Specifications

• VRWM: 382 V

• VBR: 418462 V

• VC: 640 V

• Peak Pulse Power: 400 W

• Package: DO-41

• Response Time: < 1 ns

Applications

• 430440 V DC bus surge protection

• Industrial automation and PLC module transient suppression

• Telecom and networking equipment surge protection

• SMPS/DC converter input surge handling

• Field instrumentation and control electronics

Features

• 400 W peak pulse energy absorption

• Accurate clamping for 440 V DC systems

• Ultra-fast avalanche response (< 1 ns)

• Rugged, glass-passivated DO-41 package

• Low leakage current and stable breakdown characteristics