P4KE550A 550 V 400 W Uni-Directional TVS Diode | DO-41 | Industrial & Telecom Surge Protector HORNBY

The P4KE550A is a 550 V, 400 W uni-directional TVS diode designed to protect 540550 V DC rails, industrial automation systems, telecom power lines, and sensitive electronic modules from high-energy transient events. Its fast avalanche conduction and tightly controlled breakdown range ensure dependable clamping during lightning surges, inductive switching, and load-dump events.

Key Specifications

• VRWM: 476 V

• VBR: 538563 V

• VC: 780 V

• Peak Pulse Power: 400 W

• Package: DO-41

• Response Time: < 1 ns

Applications

• 540550 V DC bus surge suppression

• Industrial automation and PLC module protection

• Telecom and networking power system transient protection

• SMPS/DC converter input protection

• Field instrumentation and control electronics

Features

• 400 W peak pulse energy handling

• Precise clamping for 550 V DC systems

• Ultra-fast avalanche response (< 1 ns)

• Rugged, glass-passivated DO-41 axial package

• Low leakage current and stable breakdown characteristics