Taiwan Semiconductor Corporation P4KE220

Overview

P4KE220 from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 220V nominal breakdown voltage (198–242V at 1mA), 175V working stand-off voltage, 1.20A peak pulse current (10/1000μs), and clamps to ≤344V under surge conditions - deployed in automotive power modules, industrial PLC I/O protection, and telecom power supply front-ends.

For engineers reviewing the P4KE220 datasheet, P4KE220 pinout, P4KE220 application, or P4KE220 equivalent, key selection criteria include its DO-204AL (DO-41) axial package, AEC-Q101 qualification option (P4KE220H), low leakage (<1μA @ 175V), fast response (<1.0ps), and compliance with ANSI/IEEE C62.35 surge standards.

Technical Context

The P4KE220 operates as a silicon avalanche diode, leveraging controlled reverse-biased breakdown to clamp transient voltages above its V_BR threshold. Its unidirectional polarity enables integration into DC-biased circuits where forward conduction must be blocked until clamping occurs.

It delivers 400W peak pulse power per 10/1000μs waveform, derates linearly above 25°C ambient, and maintains stable V_BR temperature coefficient of 0.108%/°C - critical for thermal stability in under-hood automotive environments and high-temperature industrial enclosures.

Key Specifications

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 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 SMAJ220A and 1.5KE220A, the P4KE220 provides optimal balance of 400W surge capacity, DO-41 through-hole reliability, and cost-effective AEC-Q101 qualification path - making it ideal for mid-tier automotive and industrial DC protection where board-level robustness and manual repairability matter.

Availability

P4KE220 is available at Aetrix Electronics and suitable for automotive power modules, industrial PLC I/O protection, and telecom DC power supply front-ends requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for P4KE220 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and thyristors since 1979.

The P4KE series belongs to TSC's high-reliability transient suppression portfolio, engineered specifically for robust DC line protection in automotive, industrial automation, and telecommunications infrastructure.

FAQ

What is the maximum clamping voltage of the P4KE220 under standard surge conditions?

The P4KE220 clamps to a maximum of 344V when subjected to its rated 1.20A peak pulse current (10/1000μs waveform). This value is measured at the device terminals and represents the upper bound of voltage seen by downstream circuitry during transient events - critical for ensuring compatibility with 36V or 40V-rated components in the protected path. The P4KE220 achieves this clamping performance while maintaining a 175V working stand-off voltage.

Is the P4KE220 suitable for bidirectional transient suppression?

No, the P4KE220 is a unidirectional TVS diode intended for DC-coupled circuits with defined polarity. For bidirectional protection, Taiwan Semiconductor offers the P4KE220CA variant (not P4KE220), which features symmetrical breakdown in both directions. Using the P4KE220 in AC or floating applications risks forward conduction and failure; always verify polarity alignment and select CA-suffixed parts for bipolar use cases.

Does the P4KE220 meet automotive qualification standards?

The base P4KE220 is not AEC-Q101 qualified; however, the P4KE220H variant - identifiable by the "H" suffix in the ordering code - is fully AEC-Q101 qualified and tested for temperature cycling, humidity bias, and mechanical shock. Engineers designing for automotive applications must specify P4KE220H to ensure compliance with automotive reliability requirements; the standard P4KE220 is intended for industrial and commercial use.

What is the thermal derating behavior of the P4KE220 above 25°C ambient?

The P4KE220's peak pulse power rating of 400W is specified at TA = 25°C and derates linearly with increasing ambient temperature, reaching zero at +175°C junction temperature. Derating follows the curve in Figure 2 of the datasheet: at 75°C ambient, it retains ~75% of rated power (~300W), and at 125°C, ~50% (~200W). Proper PCB copper pad area (5×5 mm per lead) is required to achieve published thermal performance.

How does the P4KE220 compare to the 1.5KE220A in terms of physical size and mounting?

The P4KE220 uses a DO-204AL (DO-41) axial-leaded package measuring approximately 4.2mm diameter × 8.5mm length, designed for through-hole mounting with 0.4–0.6mm lead diameter. In contrast, the 1.5KE220A uses the larger DO-201AD package (5.6mm × 9.5mm) with heavier leads. The P4KE220's smaller form factor and axial geometry simplify manual prototyping and service replacement, while the 1.5KE220A's bulk supports higher surge energy but requires more board space and stronger mechanical anchoring.