Taiwan Semiconductor Corporation P4KE16

Overview

P4KE16 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 16V nominal breakdown voltage, 12.9V working stand-off voltage, 23.5V maximum clamping voltage at 17.8A peak pulse current, and operates across –55°C to +175°C junction temperature range - deployed in automotive power supply inputs and industrial sensor interface circuits.

For engineers reviewing the P4KE16 datasheet, P4KE16 pinout, P4KE16 application, or P4KE16 equivalent, key selection criteria include clamping performance under 10/1000μs surge, low leakage (<1μA at 12.9V), DO-41 package compatibility with manual and automated assembly, and AEC-Q101 qualification availability for automotive-grade reliability validation.

Technical Context

The P4KE16 operates as a silicon avalanche diode optimized for fast transient suppression: it achieves sub-nanosecond response (<1.0ps rise from 0V to V_BR) and maintains low dynamic impedance during 400W 10/1000μs surges. Its unidirectional polarity enables asymmetric protection of positive-rail circuits without reverse conduction path concerns.

Thermal design relies on its 175°C maximum junction temperature and 1W steady-state power dissipation at 75°C lead temperature, supported by DO-41 package thermal resistance characteristics. The device's 0.086%/°C V_BR temperature coefficient ensures predictable voltage drift across operating ranges.

Key Specifications

Pinout & Package

DO-204AL (DO-41) package with axial leads: cathode indicated by band marking; anode and cathode terminals are non-polarized in layout but functionally directional for unidirectional operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with P4KE16, SMBJ16A offers higher surge rating but demands SMT rework, while 1.5KE16A delivers excess power capacity at the cost of larger thermal footprint and elevated leakage - P4KE16 balances proven DO-41 fit, precise 400W capability, and ultra-low leakage for cost-sensitive, thermally constrained designs.

Availability

P4KE16 is available at Aetrix Electronics and suitable for automotive power inputs, industrial sensor interfaces, lighting driver boards, and consumer USB VBUS protection requiring stable component supply across production lifecycles.

Supply support for P4KE16 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 qualification capabilities.

The P4KE series targets cost-effective, high-reliability transient suppression in automotive, industrial, and consumer systems - engineered for DO-41 compatibility, low-clamp performance, and extended temperature operation.

FAQ

What is the maximum clamping voltage of the P4KE16 under rated surge conditions?

The P4KE16 exhibits a maximum clamping voltage (V_C) of 23.5 V when subjected to its rated 17.8 A peak pulse current under the standard 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuitry remains below critical voltage thresholds during transient events. The P4KE16 maintains this clamping performance consistently across its specified operating temperature range.

Is the P4KE16 suitable for automotive applications requiring AEC-Q101 qualification?

Yes - the P4KE16H variant is explicitly AEC-Q101 qualified and listed in Taiwan Semiconductor's documentation. While the base P4KE16 is not automatically qualified, the "H" suffix denotes full stress testing per AEC-Q101 including HTGB, TC, and HTRB. For automotive use, specify P4KE16H to ensure compliance; the P4KE16 itself meets all electrical specs but lacks formal qualification evidence.

How does the P4KE16 compare to the P4KE16A in terms of breakdown voltage tolerance?

The P4KE16 has a breakdown voltage range of 14.4–17.6 V at 1 mA test current, while the P4KE16A tightens this to 15.2–16.8 V - a ±5% tolerance versus ±10% for the standard version. Both share identical clamping voltage (23.5 V), working stand-off (12.9 V), and surge rating (400W). Select P4KE16A when tighter V_BR control is needed for precision threshold alignment.

What is the reverse leakage current specification for the P4KE16 at its working stand-off voltage?

The P4KE16 specifies a maximum reverse leakage current (I_D) of 1 μA when biased at its working stand-off voltage of 12.9 V and tested at 25°C. This ultra-low leakage ensures minimal power loss in always-on circuits and prevents false triggering in high-impedance sensor nodes. Leakage remains below 1 μA across the full –55°C to +125°C operating range per characterization data.

Can the P4KE16 be used in bidirectional protection configurations?

No - the P4KE16 is a unidirectional TVS diode intended for single-polarity DC line protection. For bidirectional applications (e.g., AC lines or differential data buses), select the P4KE16CA variant, which uses center-tap construction and symmetrical breakdown in both directions. Using P4KE16 in reverse-biased mode risks permanent damage due to lack of reverse avalanche rating.