Taiwan Semiconductor Corporation P6KE300AH

Overview

P6KE300AH from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a nominal breakdown voltage of 300 V, clamps transients to ≤414 V at 1.5 A peak pulse current, and delivers low dynamic impedance with <1 μA reverse leakage at 256 V standoff voltage - deployed in automotive power supply input stages and industrial PLC I/O protection.

For engineers reviewing the P6KE300AH datasheet, P6KE300AH pinout, P6KE300AH application, or P6KE300AH equivalent, key selection criteria include its AEC-Q101 qualification, DO-204AC (DO-15) package compatibility, 175°C junction rating, and verified 10/1000 μs surge immunity up to 600 W - critical for ESD and load-dump hardened designs.

Technical Context

The P6KE300AH operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its 285–315 V breakdown range (V_BR) at 1 mA test current. Its clamping behavior limits transient voltages to 414 V maximum at 1.5 A (I_PP), with fast response time <1.0 ps from 0 V to V_BR, enabling protection of downstream MOSFETs and controllers against ISO 7637-2 load dump and IEC 61000-4-5 surges.

Thermally rated for continuous operation from −55°C to +175°C, it sustains 5 W steady-state dissipation at 75°C ambient on 5×5 mm copper pads and supports 100 A non-repetitive forward surge (8.3 ms half-sine), making it suitable for high-reliability 24 V/48 V vehicle subsystems and industrial motor drive front-ends.

Key Specifications

Pinout & Package

DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 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 SMAJ300A and 1.5KE300A, P6KE300AH offers AEC-Q101 validation in the compact DO-15 form factor - ideal for space-constrained automotive modules - while delivering identical clamping performance and superior thermal robustness over standard commercial-grade alternatives.

Availability

P6KE300AH is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power supplies, and renewable energy controllers requiring stable component supply with automotive-grade reliability and traceable sourcing.

Supply support for P6KE300AH 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, and rectifiers, with global distribution and AEC-Q101-compliant production lines.

The P6KE series targets high-reliability transient suppression in automotive and industrial environments, emphasizing rugged packaging, tight parameter tolerances, and validated surge endurance - directly addressing ISO 16750 and IEC 61000-4-5 compliance needs.

FAQ

What is the clamping voltage of P6KE300AH and how is it measured?

The P6KE300AH has a maximum clamping voltage (V_C) of 414 V at 1.5 A peak pulse current (I_PP), tested under the standardized 10/1000 μs double-exponential surge waveform. This value represents the highest voltage the device allows across its terminals during a transient event, ensuring downstream components remain within safe operating limits. The P6KE300AH achieves this clamping performance while maintaining low dynamic impedance and sub-microamp leakage at rated standoff voltage.

Is P6KE300AH suitable for bidirectional surge protection?

No, P6KE300AH is a unidirectional TVS diode, indicated by the "H" suffix (AEC-Q101 qualified) and absence of "CA" or "C" designation. It conducts only in reverse bias above V_BR and blocks forward current like a standard rectifier. For bidirectional protection, select P6KE300A (non-AEC-Q101) or P6KE300CA - both explicitly rated for symmetrical clamping in either polarity. The P6KE300AH must be oriented with cathode toward the protected line and anode to ground.

What does the "H" suffix mean in P6KE300AH?

The "H" suffix in P6KE300AH denotes AEC-Q101 qualification, confirming that the device has passed accelerated stress testing for automotive-grade reliability - including temperature cycling, humidity bias HAST, and mechanical shock - per the AEC-Q101 standard. This makes P6KE300AH suitable for under-hood and chassis-mounted applications where extended temperature range (−55°C to +175°C) and long-term stability are mandatory. The base P6KE300A lacks this qualification.

Can P6KE300AH replace P6KE300A in an existing design?

Yes, P6KE300AH is a direct functional and pin-compatible replacement for P6KE300A, sharing identical electrical specifications (V_BR: 285–315 V, V_C: 414 V, P_PK: 600 W) and DO-204AC (DO-15) package. The only difference is AEC-Q101 qualification - meaning P6KE300AH adds automotive reliability assurance without layout or schematic changes. No PCB modifications or revalidation are needed unless AEC-Q101 compliance is specifically required by the end application.

What is the maximum steady-state power dissipation for P6KE300AH?

The P6KE300AH has a steady-state power dissipation (P_D) of 5 W at T_A = 75°C when mounted on 5 × 5 mm copper pads per lead, per JEDEC standards. This rating assumes proper PCB thermal relief and is significantly lower than its 600 W surge capability - which applies only to non-repetitive, short-duration transients. Continuous power handling remains limited to 5 W to prevent junction overheating; designers must ensure adequate board-level heat sinking for sustained high-temperature operation.