P4KE18A 18V 400W Uni-Directional TVS Diode | DO-41 | DC Bus & Automotive Surge Protector HORNBY

The P4KE18A is an 18V, 400W uni-directional TVS diode designed for robust suppression of voltage spikes in automotive 12V/24V systems, industrial DC buses, relay-driven loads, and power control modules. Its fast clamping action and stable breakdown voltage provide dependable protection against load-dump energy and inductive surges.

Key Specifications

• VRWM: 15.3V

• VBR: 17.118.9V

• VC: 29.2V

• Peak Pulse Power: 400W

• Package: DO-41

• Response Time: <1ns

Applications

• Automotive electronics (load dump & switching surges)

• Industrial control DC lines

• Motor, solenoid, and relay suppression

• DC-DC converter front-end protection

• Communication & control interface protection

Features

• 400W surge absorption capability

• Fast transient response

• Low leakage for stable DC operation

• Uni-directional protection for DC circuits

• Rugged DO-41 axial package