Taiwan Semiconductor Corporation P6KE75H

Overview

P6KE75H from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-side overvoltage clamping in power supply input stages and automotive ECU protection circuits. It features a 75V nominal breakdown voltage (VBR min 67.5V, max 82.5V), 60.7V stand-off voltage (VWM), 108V maximum clamping voltage at 5.8A peak surge current, and operates across -55°C to +175°C junction temperature range.

For engineers reviewing the P6KE75H datasheet, P6KE75H pinout, P6KE75H application, or P6KE75H equivalent, key selection criteria include its AEC-Q101 qualification, DO-15 package compatibility with high-surge industrial layouts, low 0.105%/°C VBR temperature coefficient, and verified 10/1000μs waveform clamping performance under automotive load-dump conditions.

Technical Context

The P6KE75H implements a silicon avalanche diode structure optimized for fast transient suppression with sub-nanosecond response (<1.0ps from 0V to VBR). Its unidirectional configuration enables asymmetric clamping-blocking reverse conduction while shunting positive transients above VBR to ground via low dynamic impedance.

Rated for 600W non-repetitive peak pulse power at 10/1000μs, it sustains 100A forward surge current (IFSM) and maintains <1μA reverse leakage above 10V. Thermal derating follows JEDEC standards, with full power capability up to 75°C ambient and linear reduction to zero at 175°C junction temperature.

Key Specifications

Pinout & Package

DO-204AC (DO-15) package with axial leads: Cathode indicated by band marking; anode and cathode terminals support through-hole mounting on 5×5 mm copper pads per terminal for rated 5W steady-state dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ75A and 1.5KE75A, the P6KE75H offers AEC-Q101 validation and optimized unidirectional clamping for cost-sensitive automotive power rails, whereas SMBJ75A suits compact SMT layouts and 1.5KE75A provides higher surge headroom for AC-coupled systems.

Availability

P6KE75H is available at Aetrix Electronics and suitable for automotive ECU design, industrial power supply input protection, and sensor interface ESD hardening requiring stable component supply across multi-year production cycles.

Supply support for P6KE75H 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 certification capabilities.

The P6KE series targets cost-effective, high-reliability transient suppression in automotive and industrial environments, emphasizing rugged packaging, tight parameter tolerances, and compliance with international surge immunity standards.

FAQ

What is the key difference between P6KE75H and P6KE75A?

The P6KE75H is AEC-Q101 qualified and intended for automotive applications, while the P6KE75A lacks this qualification and is rated for general industrial use. Both share identical electrical parameters-75V nominal voltage, 67.5–82.5V VBR range, 60.7V VWM, and 103V clamping voltage-but only P6KE75H undergoes extended reliability testing per automotive stress standards. The "H" suffix explicitly denotes AEC-Q101 compliance in the P6KE series.

Does P6KE75H support bidirectional transient suppression?

No, P6KE75H is a unidirectional TVS diode and only clamps positive transients relative to its cathode connection. For bidirectional protection, select the P6KE75CA variant (if available) or use two P6KE75H devices in series opposition. The datasheet confirms polarity marking ("Cathode band for uni-directional products only") and specifies separate VBR min/max values applicable only in the forward direction.

What is the maximum allowable PCB trace length for P6KE75H in a load-dump protection circuit?

To maintain effective clamping, PCB trace inductance between P6KE75H and the protected node must be minimized-ideally ≤5 nH. This typically requires trace lengths under 10 mm with wide, direct routing to ground plane. Longer traces increase voltage overshoot during fast transients due to L·di/dt effects; the P6KE75H's <1.0ps response time demands low-inductance layout to realize its specified 108V clamping performance.

Can P6KE75H replace P6KE75 in an existing design?

Yes, P6KE75H is a direct replacement for P6KE75 in new designs, offering identical electrical specifications plus AEC-Q101 qualification. The "H" suffix adds automotive reliability validation without altering pinout, package, or parametric behavior. However, if the original design does not require automotive-grade qualification, P6KE75 remains functionally equivalent and may offer cost advantages for non-automotive applications.

What is the thermal resistance junction-to-ambient (RθJA) for P6KE75H in standard DO-15 mounting?

The P6KE75H has a typical RθJA of 100°C/W when mounted on 5×5 mm copper pads per lead, as defined in the Absolute Maximum Ratings table for PD = 5W at TA = 75°C. This value assumes FR-4 PCB with 1 oz copper; thermal performance degrades significantly with smaller pads or thinner copper, requiring derating per the Pulse Derating Curve (Fig.2) for operation above 75°C ambient.