Taiwan Semiconductor Corporation P6KE43AH

Overview

P6KE43AH 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 43V nominal breakdown voltage (VBR min/max = 40.9V/45.2V), 36.8V stand-off voltage (VWM), clamps to ≤59.3V at 10.6A peak surge current, and uses a DO-204AC (DO-15) axial package for industrial power supply input protection.

For engineers reviewing the P6KE43AH datasheet, P6KE43AH pinout, P6KE43AH application, or P6KE43AH equivalent, key selection criteria include its AEC-Q101 qualification, 10/1000μs 600W surge rating, low dynamic impedance, sub-1ps response time from 0V to VBR, and compliance with UL 94V-0 and RoHS/halogen-free standards.

Technical Context

The P6KE43AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 40.9–45.2V breakdown range under 1mA test current. Its clamping action limits transient energy to ≤59.3V at 10.6A, enabling robust protection of downstream ICs against ESD, lightning-induced surges, and inductive switching spikes.

Thermal design relies on its 175°C maximum junction temperature and 5W steady-state power dissipation at 75°C ambient (on 5×5mm copper pads). The device exhibits a +0.101%/°C VBR temperature coefficient and <1μA leakage above 10V, ensuring stable performance across automotive and industrial temperature ranges.

Key Specifications

Pinout & Package

DO-204AC (DO-15) axial package with cathode band marking. Leads are pure tin-plated and solderable per J-STD-002; polarity is marked by a single band indicating cathode terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ43A and 1.5KE43A, the P6KE43AH delivers optimal balance of AEC-Q101 qualification, DO-15 axial compatibility, tightest clamping (59.3V), and proven thermal performance in high-reliability through-hole power protection roles.

Availability

P6KE43AH is available at Aetrix Electronics and suitable for industrial power supply input protection, automotive body control module (BCM) power rails, and LED driver surge suppression requiring stable component supply and long-term lifecycle support.

Supply support for P6KE43AH 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.

The P6KE series belongs to TSC's AEC-Q101-qualified transient voltage suppressor product line, engineered specifically for robust overvoltage protection in automotive, industrial, and lighting applications demanding high surge immunity and long-term reliability.

FAQ

What is the breakdown voltage range of the P6KE43AH?

The P6KE43AH has a guaranteed breakdown voltage (V_BR) range of 40.9V to 45.2V at 1mA test current, measured per ANSI/IEEE C62.35. This range ensures consistent triggering behavior across production lots and temperature extremes, making it suitable for precise overvoltage threshold applications where margin above the 36.8V stand-off voltage must be maintained. The P6KE43AH's specified V_BR tolerance supports reliable coordination with downstream overvoltage protection circuits.

Is the P6KE43AH suitable for automotive applications?

Yes, the P6KE43AH is AEC-Q101 qualified, confirming its suitability for automotive applications including body control modules, infotainment power supplies, and lighting drivers. Its 175°C maximum junction temperature, robust surge capability (600W at 10/1000μs), and validation across temperature cycling, HTRB, and ESD tests meet automotive reliability requirements. The P6KE43AH is explicitly rated for use in environments subject to ISO 7637-2 pulses and load-dump conditions typical in 12V/24V vehicle electrical systems.

What is the clamping voltage of the P6KE43AH at its rated surge current?

The P6KE43AH clamps to a maximum of 59.3V at its rated peak pulse current of 10.6A (10/1000μs waveform). This clamping voltage represents the upper limit of voltage seen by protected circuitry during a full-rated surge event and is critical for ensuring downstream components-such as 36V-rated DC-DC controllers or 60V MOSFETs-remain within safe operating limits. The P6KE43AH achieves this performance with low dynamic impedance, minimizing let-through energy and thermal stress during repetitive transients.

Does the P6KE43AH have a bidirectional version?

No, the P6KE43AH is a unidirectional TVS diode. For bidirectional protection, Taiwan Semiconductor offers the P6KE43CA variant, which provides symmetrical clamping in both polarities and is used in AC line protection or differential signal paths. The "H" suffix in P6KE43AH denotes AEC-Q101 qualification, while the absence of "C" or "CA" confirms its unidirectional configuration. Users requiring bidirectional capability must select P6KE43CA or verify compatibility with their circuit topology before substitution.

What packaging options are available for the P6KE43AH?

The P6KE43AH is supplied in DO-204AC (DO-15) axial package format, with two standard packing options: 3,500 units per tape-and-reel (P6KE43AH) and 1,500 units per ammo box (P6KE43AHA0G). Both variants feature pure tin-plated leads compliant with J-STD-002 solderability requirements and RoHS/halogen-free construction. The P6KE43AH's axial lead form factor supports through-hole mounting in high-vibration or high-reliability industrial power assemblies where mechanical retention is critical.