Vishay General Semiconductor - Diodes Division P6KE91-E3/54

Overview

P6KE91-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for primary overvoltage protection of DC power rails and signal lines. It features 600 W peak pulse power (10/1000 μs), 86.5 V minimum breakdown voltage (V_BR), 77.8 V maximum standoff voltage (V_WM), and clamps to ≤125 V at 4.8 A peak pulse current - deployed in automotive body electronics, industrial sensor interfaces, and AC/DC adapter input stages.

For engineers reviewing the P6KE91-E3/54 datasheet, P6KE91-E3/54 pinout, P6KE91-E3/54 application, or P6KE91-E3/54 equivalent, key selection criteria include its unidirectional polarity, 175 °C max junction temperature, AEC-Q101 qualification (E3 suffix), low 0.106 %/°C V_BR temperature coefficient, and compatibility with J-STD-002 solderability standards.

Technical Context

This TVS diode operates as a voltage-clamping device in series with the protected line and ground, triggering when transient voltage exceeds V_BR (86.5–95.5 V) and limiting downstream voltage to ≤125 V at 4.8 A. Its glass-passivated junction enables sub-nanosecond response time and stable clamping under repetitive surges up to 0.01 % duty cycle.

Thermal performance is defined by R_θJL = 20 °C/W (junction-to-lead) and R_θJA = 75 °C/W (junction-to-ambient), supporting operation from –55 °C to +175 °C. The E3 suffix confirms RoHS compliance, JESD 201 Class 1A whisker resistance, and commercial-grade qualification per UL 94 V-0 molding compound.

Key Specifications

Pinout & Package

DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking on one end. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 durability requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ90A, P6KE91-E3/54 offers lower clamping (125 V vs. 146 V) and axial-leaded through-hole mounting for high-vibration environments; versus 1.5KE91A, it reduces board area and cost while meeting most ISO 7637-2 and IEC 61000-4-5 Level 3 requirements.

Availability

P6KE91-E3/54 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, AC/DC adapter input stages, and telecom power supply front-ends requiring stable component supply and full traceability.

Supply support for P6KE91-E3/54 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

Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The P6KE series targets cost-sensitive, high-volume transient protection applications where robustness, standardized packaging, and AEC-Q101 qualification are essential - especially in automotive and industrial power conversion.

FAQ

What is the polarity configuration of the P6KE91-E3/54?

The P6KE91-E3/54 is a unidirectional TVS diode, meaning it functions as a Zener-like clamp in reverse bias and conducts like a standard diode in forward bias. Its cathode is marked by a color band on the DO-15 package body. This polarity allows it to protect DC lines where reverse voltage is not expected, offering tighter V_BR tolerance than bidirectional variants. The P6KE91-E3/54 must be oriented with cathode toward the protected circuit's ground reference.

Does the P6KE91-E3/54 meet automotive qualification standards?

Yes, the P6KE91-E3/54 carries the E3 suffix, which denotes RoHS compliance and AEC-Q101 qualification per Vishay's documentation. This certification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for automotive body electronics, lighting, and infotainment power rails. The P6KE91-E3/54 is rated for operation from –55 °C to +175 °C, aligning with under-hood thermal requirements.

What is the maximum clamping voltage of the P6KE91-E3/54 under surge conditions?

The P6KE91-E3/54 has a maximum clamping voltage (V_C) of 125 V at 4.8 A peak pulse current (I_PPM) with a 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, and represents the upper limit of voltage imposed on the protected circuit during worst-case transient events. Engineers use this parameter to verify that downstream components - such as 150 V-rated capacitors or 100 V MOSFETs - remain within safe operating area when the P6KE91-E3/54 is active.

Can the P6KE91-E3/54 replace the P6KE91A in existing designs?

Yes, the P6KE91-E3/54 is a direct replacement for P6KE91A, sharing identical electrical specifications, DO-15 package dimensions, and thermal characteristics. The "E3/54" suffix indicates RoHS-compliant matte tin plating, JESD 201 Class 1A whisker resistance, and packaging in 13" paper tape reels (4000 units). No layout or schematic changes are required when upgrading from P6KE91A to P6KE91-E3/54, and the P6KE91-E3/54 maintains full compatibility with legacy manufacturing processes.

How does the P6KE91-E3/54 perform under repeated surge stress?

The P6KE91-E3/54 is rated for repetitive surge operation at a maximum duty cycle of 0.01 % with 10/1000 μs waveform, meaning it can sustain bursts of transients as long as average power remains below 5.0 W (its DC power dissipation rating). Derating curves in the Vishay datasheet show that at 100 °C ambient, its peak pulse power drops to ~300 W. For applications expecting frequent surges - such as motor drive feedback lines - thermal design must ensure junction temperature stays ≤175 °C, and the P6KE91-E3/54 must be mounted with adequate copper land for heat sinking.