Taiwan Semiconductor Corporation P6KE120H

Overview

P6KE120H from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in power supplies and automotive electronics. It features a 120V nominal breakdown voltage (VBR min/max: 108–132V), 97.2V stand-off voltage (VWM), clamps to ≤173V at 3.6A peak surge current, and uses DO-204AC (DO-15) axial package for board-level ESD and lightning surge suppression.

For engineers reviewing the P6KE120H datasheet, P6KE120H pinout, P6KE120H application, or P6KE120H 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 compatibility with high-reliability automotive power rail protection where fast clamping and stable leakage (<1μA @ 97.2V) are critical.

Technical Context

The P6KE120H operates as a silicon avalanche diode optimized for unidirectional transient suppression. Its junction structure delivers precise VBR tolerance (±10% for standard, ±5% for 'A' variants), temperature coefficient of 0.107%/°C, and maintains clamping performance across -55°C to +175°C junction temperature range.

It is rated for non-repetitive 600W peak pulse power per 10/1000μs waveform, with steady-state power dissipation of 5W at 75°C on 5×5 mm copper pads. The device exhibits <1μA reverse leakage at VWM and supports 100A IFSM forward surge capability - enabling robust protection against inductive switching transients and EFT events.

Key Specifications

Pinout & Package

DO-204AC (DO-15) axial package with cathode band marking. Two-terminal device: anode (unmarked end) and cathode (banded end). Designed for through-hole mounting with 9.5 mm lead length; meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ120A and 1.5KE120A, P6KE120H uniquely balances AEC-Q101 compliance, proven DO-15 mechanical robustness, and optimal 600W/173V clamping for cost-sensitive automotive and industrial designs requiring field-serviceable through-hole mounting.

Availability

P6KE120H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input conditioning, LED driver overvoltage clamping, and motor control board surge suppression requiring stable component supply and long-term lifecycle support.

Supply support for P6KE120H 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices.

The P6KE series was developed specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 qualification, tight parametric consistency, and robust surge endurance in legacy through-hole formats.

FAQ

What is the peak pulse power rating of the P6KE120H?

The P6KE120H has a peak pulse power rating of 600W under the standard 10/1000μs double-exponential waveform. This rating is valid at 25°C ambient and derates linearly above that temperature per the published pulse derating curve - at 75°C, the usable PPK drops to approximately 420W. The P6KE120H maintains this rating without degradation across its full operational junction temperature range (-55°C to +175°C).

Is the P6KE120H suitable for bidirectional transient protection?

No, the P6KE120H is a unidirectional TVS diode intended for DC rail protection with defined polarity. Its cathode band must be oriented toward the protected line. For bidirectional AC or data-line protection, use the P6KE120CA variant - which shares the same VBR range but provides symmetrical clamping in both directions. The P6KE120H will conduct heavily in forward bias and cannot suppress positive-going transients on grounded lines.

What does the 'H' suffix indicate in P6KE120H?

The 'H' suffix in P6KE120H denotes AEC-Q101 qualification, confirming that the device has passed rigorous stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock - specifically required for automotive electronic components. This qualification applies to all P6KExH parts except P6KE6V8A through P6KE9V1A, and distinguishes P6KE120H from standard P6KE120 or P6KE120A variants.

How does the clamping voltage of P6KE120H compare to its breakdown voltage?

The P6KE120H has a minimum breakdown voltage (VBR) of 108V and a maximum clamping voltage (VC) of 173V at 3.6A peak current. This 65V differential reflects the device's dynamic impedance (~18Ω), which governs how much voltage rises above VBR during surge conduction. Lower VC relative to VBR indicates superior clamping efficiency - critical for protecting 150V-rated power semiconductors without overdesigning downstream voltage margins.

Can P6KE120H replace P6KE120A in an existing design?

Yes, P6KE120H can replace P6KE120A electrically and mechanically - both share identical DO-204AC packaging, VBR range (108–132V), VWM (97.2V), and clamping performance (173V @ 3.6A). The key distinction is AEC-Q101 qualification: P6KE120H adds automotive reliability validation, while P6KE120A does not. No PCB or layout changes are needed, but system-level qualification may be required if transitioning to automotive use.