Taiwan Semiconductor Corporation P6KE27H

Overview

P6KE27H from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 27V nominal breakdown voltage (VBR min/max: 24.3V–29.7V), 21.8V stand-off voltage (VWM), clamps to ≤39.1V at 16A peak surge current, and operates within -55°C to +175°C junction temperature range - used in automotive ECU power input stages and industrial sensor interfaces.

For engineers reviewing the P6KE27H datasheet, P6KE27H pinout, P6KE27H application, or P6KE27H equivalent, key selection criteria include its AEC-Q101 qualification, DO-15 package compatibility, 10/1000μs 600W surge rating, low dynamic impedance, and fast sub-nanosecond response to transients - critical for ISO 7637-2 pulse 1/2a/5a compliance in 12V/24V vehicle systems.

Technical Context

The P6KE27H implements a silicon avalanche diode structure optimized for high-energy transient suppression in unidirectional configurations. Its clamping behavior is defined by a tightly controlled VBR (24.3–29.7V @ 1mA) and low dynamic impedance, enabling predictable voltage limiting during 10/1000μs surges up to 16A.

It operates with <1μA reverse leakage above 10V and exhibits a temperature coefficient of VBR at 0.096%/°C. The device is rated for 175°C maximum junction temperature and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Polarity is marked via cathode band; weight ≈0.400g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ24A and 1.5KE27CA, the P6KE27H offers AEC-Q101 qualification, tighter V_BR tolerance (±10% vs ±15%), and lower clamping voltage - making it preferred for automotive 24V power rail protection where reliability and voltage margin are critical.

Availability

P6KE27H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and lighting system power input protection requiring stable component supply and long-term lifecycle support.

Supply support for P6KE27H 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 thyristors - headquartered in Hsinchu, Taiwan.

The P6KE series belongs to TSC's AEC-Q101-qualified transient suppression portfolio, engineered specifically for robust overvoltage protection in automotive and harsh-environment industrial applications.

FAQ

What is the maximum clamping voltage of the P6KE27H under surge conditions?

The P6KE27H has a maximum clamping voltage (V_C) of 39.1V when subjected to a 10/1000μs waveform with a peak surge current (I_PP) of 16A. This value is measured per ANSI/IEEE C62.35 standards and represents the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream components like MCUs and regulators remain within safe operating limits. The P6KE27H maintains this performance across its full operating temperature range.

Is the P6KE27H suitable for automotive applications?

Yes, the P6KE27H is explicitly AEC-Q101 qualified (as indicated by the "H" suffix), meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock - required for under-hood and powertrain applications. Its 175°C maximum junction temperature, low leakage (<1μA), and stable V_BR drift (0.096%/°C) make the P6KE27H appropriate for 12V/24V automotive power networks compliant with ISO 7637-2 Pulse 1, 2a, and 5a.

What does the "H" suffix in P6KE27H signify?

The "H" suffix in P6KE27H denotes AEC-Q101 qualification per the ordering information table in the official Taiwan Semiconductor datasheet. This designation confirms that the specific P6KE27H lot has undergone full automotive reliability testing - distinct from standard P6KE27 or P6KE27A variants. The "H" version is not merely a packaging variant; it reflects traceable process control, extended lifetime testing, and failure mode analysis aligned with automotive quality requirements.

How does the P6KE27H compare to the P6KE27A in terms of electrical performance?

The P6KE27H shares identical electrical specifications with the P6KE27A - including V_BR (25.7–28.4V), V_WM (23.1V), V_C (37.5V @ 16.8A), and 600W surge rating - but adds AEC-Q101 qualification. The "H" variant undergoes additional screening and lot-level validation for automotive use, whereas P6KE27A is intended for industrial/commercial applications. Both use DO-15 packaging and have the same pinout, but only P6KE27H is approved for automotive deployment per TSC documentation.

What is the recommended PCB layout practice for the P6KE27H in high-surge applications?

For optimal performance, the P6KE27H should be placed as close as possible to the protected entry point (e.g., connector or fuse) with short, wide traces to minimize inductance. Use ≥5×5 mm copper pads per lead to achieve specified 5W steady-state dissipation at 75°C ambient. Avoid routing sensitive signals near the anode/cathode paths, and ensure the cathode connects directly to the protected line while the anode ties to a low-impedance ground plane - critical for maintaining the P6KE27H's <1.0ps response and effective clamping during fast transients.