Taiwan Semiconductor Corporation P4KE110

Overview

P4KE110 from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 110 V, a working stand-off voltage of 89.2 V, clamps transients to ≤158 V at 2.6 A peak pulse current, and operates across –55°C to +175°C junction temperature range - deployed in automotive power supply input stages and industrial PLC I/O protection.

For engineers reviewing the P4KE110 datasheet, P4KE110 pinout, P4KE110 application, or P4KE110 equivalent, key selection criteria include its DO-41 package compatibility, 10/1000 μs surge rating, low leakage (<1 μA @ 89.2 V), fast sub-nanosecond response, and AEC-Q101 qualification option - critical for ESD and lightning-induced transient suppression in safety-critical embedded systems.

Technical Context

The P4KE110 functions as a unidirectional avalanche diode that remains non-conductive below its 89.2 V working stand-off voltage and enters controlled avalanche conduction above its 99–121 V breakdown range (tested at 1 mA). Its clamping action limits transient voltages to 158 V at 2.6 A, delivering 400 W peak pulse power per 10/1000 μs waveform with <1.0 ps response time from 0 V to V_BR.

Thermal design relies on its 175°C maximum junction temperature and 1 W steady-state power dissipation (at 75°C lead temperature, 9.5 mm lead length). The device uses pure tin-plated DO-204AL (DO-41) leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 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 SMAJ110A, P4KE110 offers through-hole reliability and lower clamping voltage in identical form factor; versus 1.5KE110A, it trades peak surge headroom for tighter V_BR tolerance and lower cost in standard-duty applications.

Availability

P4KE110 is available at Aetrix Electronics and suitable for automotive power input protection, industrial PLC I/O protection, LED driver output protection, and telecom line interface surge suppression requiring stable component supply across multi-year production cycles.

Supply support for P4KE110 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, serving global automotive, industrial, and consumer markets since 1979.

The P4KE series belongs to TSC's transient voltage suppressor product line, engineered specifically for high-reliability overvoltage protection in harsh environments - emphasizing AEC-Q101 qualification, tight parametric tolerances, and consistent surge performance across temperature.

FAQ

What is the maximum clamping voltage of the P4KE110 under standard test conditions?

The P4KE110 clamps to a maximum of 158 V when subjected to its rated 2.6 A peak pulse current (I_PPM) under the 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.

Is the P4KE110 unidirectional or bidirectional, and how is polarity identified?

The P4KE110 is a unidirectional TVS diode, with polarity indicated by a cathode band marked on the DO-41 package body. When installed, the cathode connects to the line being protected (e.g., +12 V rail), and the anode connects to ground. Bidirectional variants (e.g., P4KE110CA) exist in the same family but are distinct orderable parts with different marking and electrical symmetry.

Does the P4KE110 meet automotive qualification standards?

The base P4KE110 is not AEC-Q101 qualified; however, the P4KE110H variant - identical in all electrical and mechanical specifications - is fully AEC-Q101 qualified per Rev D requirements, including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. Always specify the "H" suffix for automotive-grade procurement.

What is the reverse leakage current specification for the P4KE110 at its working voltage?

The P4KE110 exhibits a maximum reverse leakage current (I_R) of 1 μA when biased at its working stand-off voltage of 89.2 V and tested at 25°C. This ultra-low leakage ensures negligible power loss in always-on systems and preserves signal integrity in high-impedance sensing paths - verified per ANSI/IEEE C62.35 test methodology.

Can the P4KE110 be used in parallel to increase surge current handling?

Parallel use of P4KE110 devices is not recommended due to inherent V_BR mismatch (±5% tolerance), which causes uneven current sharing and potential thermal runaway. For higher surge capacity, select the 1.5KE110A (1500 W) or P6KE110A (600 W) in the same DO-41 package - both offer guaranteed matching and proven parallel stability in manufacturer-recommended configurations.