Taiwan Semiconductor Corporation P4KE15C

Overview

P4KE15C from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in DC power rails and signal lines. It features a 15V nominal standoff voltage, 22.0V maximum clamping voltage at 19.0A peak pulse current, 400W peak pulse power rating (10/1000μs), and DO-204AL (DO-41) axial package - deployed in automotive lighting control modules, industrial sensor interfaces, and USB port ESD protection circuits.

For engineers reviewing the P4KE15C datasheet, P4KE15C pinout, P4KE15C application, or P4KE15C equivalent, key selection considerations include its bidirectional clamping behavior, low leakage (<1μA at 12.1V), fast response time (~5ns), UL 94V-0 molded case, and AEC-Q101 qualification option - all critical for high-reliability 12V/24V system transient immunity design.

Technical Context

The P4KE15C operates as a bidirectional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling single-device protection of AC-coupled or floating signal paths. Its V_BR range is 13.5–16.5V at 1mA test current, and it maintains stable clamping up to 175°C junction temperature.

It complies with ANSI/IEEE C62.35 for transient suppression and delivers 400W peak pulse power under standardized 10/1000μs waveform testing. The device exhibits <0.1% typical V_BR temperature coefficient and meets JESD201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with UL 94V-0 flammability rating and pure tin-plated leads compliant with J-STD-002 solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ15CA and 1.5KE15CA, the P4KE15C offers optimal balance of 400W surge handling, DO-41 axial form factor, and AEC-Q101 availability - making it preferred for cost-sensitive, through-hole automotive and industrial power rail protection where layout flexibility and qualification traceability matter.

Availability

P4KE15C is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface, and USB port ESD protection requiring stable component supply across production lifecycles.

Supply support for P4KE15C 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 P4KE series is part of TSC's transient protection portfolio engineered for high-reliability DC power and signal line immunity in automotive, industrial, and consumer electronics - emphasizing low clamping, fast response, and qualification-ready variants.

FAQ

What is the clamping voltage of the P4KE15C and how does it protect downstream components?

The P4KE15C has a maximum clamping voltage (V_C) of 22.0V at 19.0A peak pulse current (10/1000μs). This means that during a transient event, the device limits the voltage across protected circuitry to no more than 22.0V - well below the breakdown thresholds of most 24V-rated ICs and regulators. By doing so, the P4KE15C prevents overvoltage stress, latch-up, or permanent damage to sensitive downstream components such as microcontrollers, transceivers, or power management ICs. Its bidirectional symmetry ensures protection regardless of transient polarity.

Is the P4KE15C unidirectional or bidirectional, and how does that affect circuit placement?

The P4KE15C is a bidirectional TVS diode, indicated by the "C" suffix in its part number. Unlike unidirectional types (e.g., P4KE15A), it provides symmetrical avalanche conduction in both forward and reverse directions - meaning it clamps transients of either polarity without requiring orientation during placement. This eliminates polarity marking concerns and simplifies layout on AC-coupled lines, differential buses (e.g., RS-485), or floating power domains where voltage reversals may occur. No cathode band is marked on the P4KE15C package.

Does the P4KE15C meet automotive qualification standards?

The base P4KE15C is not AEC-Q101 qualified; however, the variant P4KE15CH (with "H" suffix) is explicitly qualified to AEC-Q101 for automotive use. This qualification includes stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life - confirming suitability for under-hood and chassis-mounted applications. When automotive-grade reliability is required, engineers must specify P4KE15CH rather than P4KE15C, as the "H" denotes full qualification documentation and traceable lot-level validation per AEC-Q101 Rev D.

What is the maximum operating temperature and thermal derating behavior of the P4KE15C?

The P4KE15C has a maximum junction temperature (T_J) of +175°C and operates from −55°C to +175°C. Its steady-state power dissipation (P_D) is rated at 1W at lead temperature (T_L) = 75°C, with linear derating above that point - dropping to zero at 175°C. Derating follows the curve in Figure 2 of the datasheet: for example, at T_L = 100°C, allowable P_D reduces to ~0.7W. This behavior is critical for high-ambient applications like engine control units, where heatsinking and lead length (0.375″ copper pad per terminal) directly impact sustained surge endurance.

How does the P4KE15C compare to the P4KE15A in terms of electrical performance?

The P4KE15C is bidirectional with symmetrical V_BR (13.5–16.5V) and clamping in both directions, while the P4KE15A is unidirectional - featuring a cathode band and conducting only in reverse bias. Electrically, P4KE15A has identical V_BR, V_WM, and V_C specs but cannot suppress positive-going transients on the anode side. The P4KE15C's bidirectional nature makes it suitable for AC signal lines or floating rails, whereas P4KE15A is reserved for DC supply-to-ground protection where polarity is fixed and known. Their DO-41 packages are mechanically identical.