Taiwan Semiconductor Corporation P4KE150

Overview

P4KE150 from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 150 V, clamps transients to ≤215 V at 1.9 A peak pulse current, and operates across –55°C to +175°C junction temperature range - suitable for automotive power supply input stages and industrial PLC I/O protection.

For engineers reviewing the P4KE150 datasheet, P4KE150 pinout, P4KE150 application, or P4KE150 equivalent, key selection criteria include its DO-41 package compatibility, 121 V working stand-off voltage, <1 μA reverse leakage at rated VWM, and AEC-Q101 qualification option (P4KE150H), critical for automotive ECU front-end surge immunity design.

Technical Context

The P4KE150 uses an avalanche breakdown mechanism to clamp fast-rising transients with sub-nanosecond response (<1.0 ps from 0 V to VBR). Its low dynamic impedance ensures minimal voltage overshoot during 10/1000 μs surge events up to 400 W.

It is rated for unidirectional operation only, with polarity defined by cathode band marking. The device exhibits a positive temperature coefficient of VBR (+0.108 %/°C), enabling predictable voltage drift under thermal stress in high-power environments.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41) - axial-leaded, glass-passivated, RoHS-compliant plastic case with UL 94V-0 flammability rating and pure tin-plated leads solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with Littelfuse SMAJ150A and Vishay 1.5KE150A, the P4KE150 offers through-hole DO-41 compatibility, AEC-Q101 qualification path (H-suffix), and lower leakage (<1 μA), making it optimal for automotive and high-reliability industrial through-hole designs where thermal cycling and long-term stability are prioritized.

Availability

P4KE150 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply with traceable sourcing and long-lifecycle support.

Supply support for P4KE150 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.

The P4KE series belongs to TSC's high-reliability TVS portfolio engineered specifically for robust transient immunity in harsh-environment applications - emphasizing AEC-Q101 compliance, wide temperature operation, and consistent clamping performance across production lots.

FAQ

What is the maximum clamping voltage of the P4KE150 under standard test conditions?

The P4KE150 has a maximum clamping voltage (VC) of 215 V when subjected to a 10/1000 μs waveform at 1.9 A peak pulse current, as specified in the Taiwan Semiconductor datasheet. This value represents the highest voltage that will appear across the protected circuit during a full-rated surge event, ensuring downstream components remain within safe operating limits. The P4KE150 maintains this clamping performance across its full operating temperature range.

Is the P4KE150 suitable for bidirectional transient protection?

No, the P4KE150 is a unidirectional TVS diode intended for DC line protection with defined polarity - cathode must be connected to the higher-potential side of the circuit. For bidirectional AC or data-line protection, the P4KE150CA variant (or equivalent CA-suffix part) is required. The P4KE150 itself does not conduct symmetrically and lacks reverse-direction breakdown specification.

What package type does the P4KE150 use, and what are its mechanical highlights?

The P4KE150 uses the DO-204AL (DO-41) axial-leaded package - a standardized through-hole outline with 0.300 g mass, UL 94V-0 rated molding compound, and pure tin-plated leads compliant with J-STD-002 solderability requirements. Its polarity is marked by a cathode band, and it meets JESD201 Class 2 whisker resistance, making it suitable for automotive and industrial assembly processes.

Does the P4KE150 meet automotive reliability standards?

Yes - the P4KE150H variant is explicitly qualified to AEC-Q101 for automotive applications, covering stress tests including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing. While the base P4KE150 is not automatically qualified, the H-suffix version provides full documentation and test reports validating its use in engine control units, body electronics, and ADAS power domains.

How does the P4KE150 compare to the 1.5KE150A in terms of electrical performance?

The P4KE150 and Vishay 1.5KE150A share identical nominal voltage (150 V), peak power (400 W), and DO-41 packaging, but differ in VBR tolerance (±10% vs. ±5%) and clamping voltage (215 V vs. 219 V at comparable IPPM). The P4KE150 also specifies lower reverse leakage (<1 μA vs. ≤5 μA), offering tighter leakage control for ultra-low-power systems. Both meet ANSI/IEEE C62.35 surge standards.