Taiwan Semiconductor Corporation P4KE75CH

Overview

P4KE75CH from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 75V nominal breakdown voltage (67.5–82.5V), 400W peak pulse power rating at 10/1000μs, clamping voltage of 108V at 3.8A peak pulse current, and low leakage (<1μA at 60.7V working stand-off voltage). It is AEC-Q101 qualified and housed in DO-204AL (DO-41) package for automotive-grade reliability.

For engineers reviewing the P4KE75CH datasheet, P4KE75CH pinout, P4KE75CH application, or P4KE75CH equivalent, key selection criteria include its unidirectional polarity, 108V clamping performance under 3.8A surge, AEC-Q101 qualification status, DO-41 mechanical compatibility, and suitability for 12V/24V automotive power rail protection against ISO 7637-2 pulses and EFT.

Technical Context

The P4KE75CH operates as a silicon avalanche diode with fast response time (<1.0ps from 0V to V_BR) and low dynamic impedance, enabling rapid clamping of transients before downstream ICs are damaged. Its unidirectional configuration provides forward conduction capability (V_F = 3.5V at 25A) and reverse surge suppression up to 108V.

Rated for continuous operation from –55°C to +175°C junction temperature, it supports high-reliability applications where thermal derating and long-term stability under repeated surges are critical. The device meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements, confirming robustness in harsh environments.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Leads are pure tin plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ75A and 1.5KE75A, the P4KE75CH offers optimal balance of AEC-Q101 compliance, axial DO-41 mechanical robustness, precise 108V clamping, and ultrafast response-making it preferred for new automotive designs where qualification traceability and thermal reliability are prioritized over raw power rating or SMT density.

Availability

P4KE75CH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, LED lighting drivers, and CAN bus nodes requiring stable component supply with full AEC-Q101 documentation and lot traceability.

Supply support for P4KE75CH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 certified product lines.

The P4KE series was developed specifically for automotive and industrial transient suppression, emphasizing high surge robustness, low clamping ratio, and qualification-grade reliability in axial packages for legacy and new-platform designs.

FAQ

What is the clamping voltage of the P4KE75CH under standard 10/1000μs surge conditions?

The P4KE75CH has a maximum clamping voltage (V_C) of 108V at 3.8A peak pulse current under the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuits experience no more than 108V during a 400W transient event. The P4KE75CH maintains this clamping performance across its full operating temperature range of –55°C to +175°C.

Is the P4KE75CH unidirectional or bidirectional, and how is polarity marked?

The P4KE75CH is a unidirectional TVS diode, indicated by the "CH" suffix (where "H" denotes AEC-Q101 qualification and absence of "C" or "CA" confirms unidirectional construction). Polarity is marked by a cathode band on the DO-41 package body; the banded end connects to the protected line, while the anode connects to ground or low-side reference. This configuration enables forward conduction during reverse-battery events.

Does the P4KE75CH meet automotive qualification standards?

Yes, the P4KE75CH is explicitly AEC-Q101 qualified, as confirmed in the ordering code ("H" suffix) and product documentation. It has passed high-temperature operating life (HTOL), temperature cycling (TCT), and high-temperature reverse bias (HTRB) tests required for automotive electronics. The P4KE75CH is rated for junction temperatures up to +175°C and complies with JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.

What is the maximum steady-state power dissipation for the P4KE75CH at 75°C lead temperature?

The P4KE75CH has a steady-state power dissipation (P_D) of 1W when mounted on 5 × 5 mm copper pads per lead at a lead temperature (T_L) of 75°C. Derating is required above 25°C ambient per Figure 2 in the datasheet, with zero power capability at 175°C junction temperature. This rating applies only to continuous DC or low-frequency conditions-not to transient surge events covered by the 400W P_PK specification.

How does the P4KE75CH compare to the P4KE75A in terms of electrical performance?

The P4KE75CH and P4KE75A share identical electrical parameters-including V_BR (67.5–82.5V), V_WM (60.7V), V_C (108V), and P_PK (400W)-but differ in qualification status: the "H" suffix in P4KE75CH confirms AEC-Q101 qualification, while P4KE75A lacks this certification. Both use DO-41 packaging and unidirectional configuration, but only the P4KE75CH is approved for automotive safety-critical applications requiring formal stress-test validation.