P4KE47A 47 V 400 W Uni-Directional TVS Diode | DO-41 | Industrial & Automotive Surge Protector HORNBY

The P4KE47A is a 47 V, 400 W uni-directional TVS diode designed to protect 3648 V DC rails, industrial control modules, automotive ECU lines, and communication interfaces from high-energy transients. With a fast avalanche response and a tightly controlled breakdown range, it ensures stable and reliable clamping during inductive load kickback, switching spikes, and surge events.

Key Specifications

• VRWM: 40.2 V

• VBR: 44.4 V 49.1 V

• VC: 64.8 V

• Peak Pulse Power: 400 W

• Package: DO-41 (DO-204AC)

• Response Time: < 1 ns

Applications

• 3648 V DC power line protection

• Industrial PLC and automation controller surge suppression

• SMPS input stage and DC/DC front-end protection

• 48 V telecom equipment transient protection

• Automotive 4248 V electrical subsystems

Features

• High-energy 400 W peak pulse capability

• Accurate breakdown range for 48 V-class systems

• Ultra-fast avalanche response

• Rugged glass-passivated, long-life DO-41 package

• Low leakage and stable clamping characteristics