P4KE51A 51 V 400 W Uni-Directional TVS Diode | DO-41 | High-Energy Industrial Surge Protector HORNBY

The P4KE51A is a 51 V, 400 W uni-directional TVS diode built for protecting 4850 V DC rails, industrial control systems, telecom modules, and communication interfaces from severe transient surges. With its fast avalanche action and tightly regulated breakdown window, it delivers reliable clamping performance during switching spikes, inductive load dumps, and lightning-induced surges.

Key Specifications

• VRWM: 43.6 V

• VBR: 48.553.6 V

• VC: 71.4 V

• Peak Pulse Power: 400 W

• Package: DO-41 (DO-204AC)

• Response Time: < 1 ns

Applications

• 48 V DC power line transient suppression

• Telecom and networking equipment surge protection

• Industrial automation & PLC I/O protection

• SMPS and DC/DC converter input protection

• Battery-powered 48 V systems and accessories

Features

• Robust 400 W surge-handling capability

• Precise clamping for 4850 V DC systems

• Fast avalanche response (< 1 ns)

• Glass-passivated, rugged DO-41 package

• Low leakage and stable breakdown characteristics