Taiwan Semiconductor Corporation P4KE62

Overview

P4KE62 from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 62 V, clamps transients to ≤89 V at 4.7 A peak pulse current, and operates across –55°C to +175°C with <1 μA reverse leakage at 50.2 V working stand-off voltage - deployed in automotive power supply inputs and industrial sensor interfaces.

For engineers reviewing the P4KE62 datasheet, P4KE62 pinout, P4KE62 application, or P4KE62 equivalent, key selection criteria include its DO-41 package compatibility, 10/1000 μs surge rating, unidirectional polarity marking, and temperature coefficient of 0.104 %/°C - all critical for ESD and load-dump immunity validation in 24 V and 48 V systems.

Technical Context

The P4KE62 uses an avalanche junction structure optimized for fast clamping response (<1.0 ps rise time from 0 V to V_BR) and low dynamic impedance under transient stress. Its unidirectional configuration enables asymmetric protection with cathode-anode polarity, supporting DC-biased circuits where reverse conduction must be blocked.

Rated for 400 W peak pulse power per 10/1000 μs waveform and derated above 25°C, it sustains 1 W steady-state dissipation on 5×5 mm copper pads. The device meets AEC-Q101 qualification when ordered with "H" suffix and complies with UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards.

Key Specifications

Pinout & Package

DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode indicated by band marking. Leads are pure tin-plated and solderable per J-STD-002; weight ≈0.300 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ60A and 1.5KE62A, the P4KE62 offers optimal balance of through-hole manufacturability, precise 50.2 V stand-off, and 89 V clamping in cost-sensitive 24–48 V industrial and automotive applications - without requiring layout changes or over-spec'ing power rating.

Availability

P4KE62 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and LED lighting systems requiring stable component supply and long-term obsolescence management.

Supply support for P4KE62 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 - serving automotive, industrial, and consumer markets since 1979.

The P4KE series targets cost-effective, high-reliability transient protection for DC power rails and signal lines, with emphasis on AEC-Q101 compliance, UL recognition, and broad voltage coverage from 6.8 V to 440 V.

FAQ

What is the maximum clamping voltage of the P4KE62 under rated surge conditions?

The P4KE62 clamps to a maximum of 89 V when subjected to its rated 4.7 A peak pulse current (I_PPM) under the standard 10/1000 μs waveform. This value is measured at T_A = 25°C and defines the upper voltage limit imposed on the protected circuit during full-surge events - critical for ensuring downstream components remain within their absolute maximum ratings. The P4KE62 achieves this with low dynamic impedance and fast avalanche response.

Is the P4KE62 suitable for automotive applications?

Yes - the P4KE62 is available in an AEC-Q101 qualified version (P4KE62H), which undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and mechanical shock. While the base P4KE62 meets key electrical specs, only the "H" suffix variant is certified for automotive use. Designers must specify P4KE62H for under-hood or chassis-mounted applications where qualification evidence is required.

What does the "A" suffix mean in P4KE62A, and how does it differ from P4KE62?

The "A" suffix denotes a tighter tolerance version: P4KE62A has a breakdown voltage range of 58.9–65.1 V (vs. 55.8–68.2 V for P4KE62) and a lower clamping voltage of 85 V (vs. 89 V). Both share identical package, power rating, and thermal specs. P4KE62A is preferred in designs requiring tighter V_BR control and reduced clamping margin - such as precision power rail supervisors or systems with narrow voltage tolerances downstream of the P4KE62.

Can the P4KE62 be used in bidirectional configurations?

No - the P4KE62 is strictly unidirectional. Bidirectional operation requires the CA-suffixed variant (e.g., P4KE62CA), which uses a back-to-back diode structure enabling symmetrical clamping in both polarities. Using a unidirectional P4KE62 on AC or bipolar signal lines risks catastrophic failure during reverse overvoltage, as it lacks reverse breakdown capability. Always verify polarity marking and select CA variants for bidirectional protection.

What is the thermal resistance junction-to-ambient (R_θJA) for the P4KE62 in DO-41 package?

Taiwan Semiconductor does not publish R_θJA for the P4KE62 as a standalone parameter; instead, thermal performance is defined via derating curves (Fig.2) and steady-state power dissipation of 1 W at T_L = 75°C with 9.5 mm lead length. For PCB-level thermal modeling, assume R_θJA ≈ 100°C/W for standard FR-4 with minimal copper; actual values depend heavily on pad area and airflow. The P4KE62's 175°C max junction temperature allows operation in high-ambient environments when properly mounted.