P4KE400A 400 V 400 W Uni-Directional TVS Diode | DO-41 | Industrial & Telecom Surge Protector HORNBY

The P4KE400A is a 400 V, 400 W uni-directional TVS diode designed to protect 390400 V DC rails, industrial automation systems, telecom power lines, and sensitive electronic modules from high-energy transients. Its fast avalanche conduction and tightly regulated breakdown range ensure dependable clamping during lightning surges, load-dump events, and inductive switching spikes.

Key Specifications

• VRWM: 347 V

• VBR: 380420 V

• VC: 580 V

• Peak Pulse Power: 400 W

• Package: DO-41

• Response Time: < 1 ns

Applications

• 390400 V DC bus surge suppression

• Industrial automation and PLC equipment protection

• Telecom and networking power system transient protection

• SMPS/DC converter input surge handling

• Field instrumentation and control electronics

Features

• 400 W peak pulse energy capability

• Accurate clamping for 400 V DC systems

• Ultra-fast avalanche response (< 1 ns)

• Rugged, glass-passivated DO-41 axial package

• Low leakage current and stable breakdown performance