Taiwan Semiconductor Corporation P6KE91H

Overview

P6KE91H from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 91 V, clamps transients to ≤131 V at 4.8 A peak surge current, and delivers sub-nanosecond response (<1.0 ps) to ESD and lightning-induced surges - deployed in automotive body control modules and industrial PLC I/O protection circuits.

For engineers reviewing the P6KE91H datasheet, P6KE91H pinout, P6KE91H application, or P6KE91H equivalent, key selection criteria include its AEC-Q101 qualification, DO-15 package compatibility with high-density PCB layouts, 73.7 V stand-off voltage margin for 72 V nominal systems, and low 1 μA leakage at rated V_WM.

Technical Context

The P6KE91H operates as a silicon avalanche diode with unidirectional polarity, leveraging controlled reverse-biased breakdown to shunt transient energy away from downstream circuitry. Its 10/1000 μs waveform rating of 600 W defines surge handling under standardized lightning-surge conditions per IEC 61000-4-5.

With a maximum clamping voltage of 131 V at 4.8 A IPP, it ensures protected ICs experience no more than this voltage during surge events. Its temperature coefficient of V_BR is +0.106 %/°C, indicating predictable voltage drift across the -55°C to +175°C junction range.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with cathode band marking. Meets UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ90A and 1.5KE91A, the P6KE91H offers AEC-Q101 qualification and tighter V_BR tolerance (±10% vs ±5% for 1.5KE91A), making it optimal for automotive-grade reliability where consistent clamping and qualification traceability are mandatory.

Availability

P6KE91H is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting drivers, and telecom power systems requiring stable component supply with full AEC-Q101 compliance and long-term lifecycle support.

Supply support for P6KE91H 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 validation capability.

The P6KE series was developed specifically for robust, cost-effective transient protection in automotive and industrial environments where reliability under surge stress and high-temperature operation are critical design requirements.

FAQ

What is the key qualification status of the P6KE91H?

The P6KE91H is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, body electronics, and lighting systems. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and surge robustness - all verified per the AEC-Q101 standard. The "H" suffix explicitly denotes this qualification, distinguishing it from non-automotive variants in the P6KE family.

How does the P6KE91H differ from the P6KE91A variant?

The P6KE91H and P6KE91A share identical electrical parameters - including 81.9–100 V V_BR, 73.7 V V_WM, and 131 V V_C - but differ in qualification and marking. The P6KE91H carries AEC-Q101 certification and uses the "H" suffix; the P6KE91A is a standard industrial-grade part with tighter V_BR tolerance (86.5–95.5 V) but no automotive qualification. Both use DO-15 packaging and unidirectional configuration.

What is the maximum clamping voltage of the P6KE91H under surge conditions?

The P6KE91H has a maximum clamping voltage (V_C) of 131 V at 4.8 A peak pulse current (I_PP), measured using the 10/1000 μs standard waveform. This value represents the highest voltage imposed on the protected circuit during a defined surge event and is guaranteed across the full operating temperature range (-55°C to +175°C). It ensures downstream components see no more than 131 V even under worst-case transient stress.

Can the P6KE91H be used in bidirectional configurations?

No, the P6KE91H is a unidirectional TVS diode and must be used with correct polarity - cathode toward the protected line, anode to ground. Bidirectional protection requires a CA-suffixed part (e.g., P6KE91CA) or separate back-to-back diodes. Using the P6KE91H in reverse polarity will result in forward conduction and potential failure; its datasheet specifies unidirectional operation only, confirmed by cathode-band marking and test conditions referenced to single-direction breakdown.

What packaging options are available for the P6KE91H?

The P6KE91H is supplied in DO-204AC (DO-15) axial-leaded packaging, available in two formats: 3,500 units per tape-and-reel (standard for automated assembly) and 1,500 units per ammo box (for manual or low-volume prototyping). Lead finish is pure tin, compliant with J-STD-002 solderability standards, and the molding compound meets UL 94V-0 flammability requirements - all documented in Taiwan Semiconductor's official P6KE series datasheet revision P2203.