P4KE9.1A – 9.1V 400W Uni-Directional TVS Diode | DO-41 | Surge & Transient Voltage Suppression SEP

The P4KE9.1A is a 9.1V, 400W uni-directional TVS diode designed to protect electronic circuits from voltage transients, ESD strikes, lightning surges, and inductive switching events. Housed in a DO-41 package, it offers fast response time and stable clamping performance, making it ideal for DC line and low-voltage power rail protection.

Key Specifications

• Working Peak Reverse Voltage : 7.78V

• Breakdown Voltage : 8.55–9.55V

• Clamping Voltage : 15.6V @ 25.6A

• Peak Pulse Power: 400W (8/20µs waveform)

• Package: DO-41 Through-Hole

• Response Time: <1ps (from surge arrival)

Applications

• Protection for DC power lines

• Industrial power supplies

• Automotive electronics

• Consumer electronics & adapters

• Relay/inductive load suppression

• Communication interfaces and low-power ports

Features

• High surge capability (400W peak pulse power)

• Extremely fast transient response

• Low leakage current

• Uni-directional protection for DC circuits

• Robust DO-41 epoxy-molded package