P4KE56A 56 V 400 W Uni-Directional TVS Diode | DO-41 | High-Voltage DC Surge Protector HORNBY

The P4KE56A is a 56 V, 400 W uni-directional TVS diode engineered for protecting 5056 V DC buses, industrial control units, telecom power rails, and instrumentation from severe electrical transients. Its fast avalanche action and defined breakdown range ensure reliable clamping during load-dump events, inductive switching, and lightning-induced surges.

Key Specifications

• VRWM: 47.8 V

• VBR: 53.258.8 V

• VC: 77.4 V

• Peak Pulse Power: 400 W

• Package: DO-41

• Response Time: < 1 ns

Applications

• 4856 V DC power surge suppression

• Telecom and networking power protection

• Industrial automation I/O and sensor interfaces

• DC converters and SMPS front-end protection

• Field control equipment and instrumentation lines

Features

• 400 W surge energy absorption

• Accurate clamping for 5056 V power systems

• Ultra-fast avalanche response (< 1 ns)

• Rugged DO-41 axial design with high reliability

• Low leakage and stable breakdown performance