Taiwan Semiconductor Corporation P6KE47

Overview

P6KE47 from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 47V nominal breakdown voltage (42.3–51.7V), 38.1V stand-off voltage, 67.8V maximum clamping voltage at 9.2A peak surge current, and low dynamic impedance for fast response to ESD and lightning-induced transients in automotive and industrial control systems.

For engineers reviewing the P6KE47 datasheet, P6KE47 pinout, P6KE47 application, or P6KE47 equivalent, key selection criteria include clamping voltage margin relative to protected IC V_MAX, leakage current below 1μA at 38.1V, AEC-Q101 qualification status, DO-15 package thermal derating above 25°C, and compatibility with 10/1000μs surge waveforms per IEC 61000-4-5.

Technical Context

The P6KE47 operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its specified breakdown range. Its junction capacitance is not specified in the provided documentation, but typical TVS devices in this series exhibit sub-100pF values at low bias - suitable for <1MHz signal line protection without significant signal distortion.

Thermal performance is defined by a 175°C maximum junction temperature and derated peak pulse power above 25°C ambient, per Fig.2. The device uses a single-die DO-204AC (DO-15) package with pure tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

DO-204AC (DO-15) package: axial-leaded, cylindrical glass-passivated body with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Polarity is marked via cathode band; anode and cathode terminals are non-reversible in unidirectional configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ47A and 1.5KE47A, the P6KE47 offers optimal balance of axial-leaded manufacturability, 600W capability, and tight clamping (67.8 V) in the cost-effective DO-15 form factor - ideal for high-volume automotive and industrial power entry designs where through-hole assembly remains standard.

Availability

P6KE47 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC I/O protection, LED driver overvoltage clamp, and RS-485 transceiver line protection requiring stable component supply and long-term lifecycle support.

Supply support for P6KE47 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 power management, protection, and interface components.

The P6KE series belongs to TSC's transient voltage suppressor product line, engineered specifically for high-reliability overvoltage protection in automotive, industrial, and consumer power systems where robustness against ESD, EFT, and surge events is mandatory.

FAQ

What is the maximum clamping voltage of the P6KE47 under standard test conditions?

The P6KE47 has a maximum clamping voltage (V_C) of 67.8 V at 9.2 A peak pulse current (I_PP) using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry will not experience voltages exceeding 67.8 V during standardized surge events - a critical parameter for ensuring compatibility with 75V-rated downstream components in the P6KE47 design chain.

Is the P6KE47 unidirectional or bidirectional, and how is polarity identified?

The P6KE47 is a unidirectional TVS diode, intended for DC line protection where polarity is fixed. Polarity is identified by a cathode band marked on the DO-15 package body; the banded end connects to the protected line (cathode), while the unbanded end connects to ground (anode). Bidirectional variants use "CA" suffixes (e.g., P6KE47CA), which are distinct part numbers - the P6KE47 itself does not support symmetrical clamping in both directions.

Does the P6KE47 meet AEC-Q101 reliability requirements for automotive use?

The base P6KE47 is not AEC-Q101 qualified; however, the P6KE47H variant - explicitly designated in the ordering code with "H" suffix - is AEC-Q101 qualified per Version P2203 documentation. Engineers specifying P6KE47 for automotive applications must select P6KE47H to ensure compliance with stress testing for temperature cycling, humidity, and mechanical shock required in powertrain and body electronics modules.

What is the leakage current specification for the P6KE47 at its rated standoff voltage?

At its rated standoff voltage (V_WM) of 38.1 V, the P6KE47 exhibits a maximum reverse leakage current (I_D) of 1 μA at 25°C. This ultra-low leakage ensures minimal power loss in always-on circuits such as automotive wake-up receivers or battery-backed sensors - a key advantage over higher-leakage alternatives that could compromise standby current budgets in the P6KE47 implementation.

How does the P6KE47's thermal derating affect its surge capability at elevated ambient temperatures?

The P6KE47's 600W peak pulse power rating is specified at 25°C ambient and must be linearly derated above that temperature per Fig.2 in the datasheet: at 75°C, it drops to approximately 450W, and at 125°C, to ~250W. This derating directly reduces sustainable I_PP - for example, at 100°C ambient, the P6KE47 clamps 67.8 V at only ~6.5 A instead of 9.2 A - requiring careful thermal layout and ambient margin analysis in the P6KE47 application.