Taiwan Semiconductor Corporation P6KE27

Overview

P6KE27 from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 27 V, clamps transients to ≤39.1 V at 16 A peak surge current, and delivers fast response (<1.0 ps from 0 V to V_BR), with <1 μA reverse leakage at 21.8 V stand-off voltage. It is widely deployed in automotive body electronics and industrial power supply input stages.

For engineers reviewing the P6KE27 datasheet, P6KE27 pinout, P6KE27 application, or P6KE27 equivalent, key selection criteria include its DO-204AC (DO-15) axial package, unidirectional polarity, 27 V nominal clamping threshold, and compliance with AEC-Q101 (when ordered as P6KE27H), making it suitable for ESD and lightning-induced surge protection in harsh environments.

Technical Context

The P6KE27 operates as a silicon avalanche diode optimized for high-energy transient suppression using a single-die DO-204AC structure. Its low dynamic impedance ensures stable clamping under 10/1000 µs surge waveforms, while its junction temperature rating of –55 °C to +175 °C supports operation in under-hood automotive and industrial control cabinets.

It exhibits a temperature coefficient of V_BR of 0.096 %/°C, enabling predictable voltage drift across thermal excursions. The device is rated for non-repetitive peak pulse power of 600 W and withstands up to 100 A forward surge current (8.3 ms half-sine), confirming robustness against inductive switching events in relay-driven loads.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with cathode band marking. 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 SMBJ24A and 1.5KE27A, the P6KE27 provides a precise 27 V unidirectional clamping point in a proven through-hole package, with AEC-Q101 qualification available for automotive use-making it ideal for cost-sensitive, thermally robust, and reliability-critical 24 V system protection where manual assembly or serviceability matters.

Availability

P6KE27 is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC input protection, and DC power supply inputs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for P6KE27 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 devices.

The P6KE series belongs to TSC's transient voltage suppressor product line, engineered specifically for high-reliability overvoltage protection in automotive, industrial, and telecom infrastructure applications where robustness and AEC-Q101 compliance are critical.

FAQ

What is the maximum clamping voltage of the P6KE27 under surge conditions?

The P6KE27 has a maximum clamping voltage (V_C) of 39.1 V when subjected to its rated peak pulse current of 16 A (10/1000 µs waveform). This value is measured at the device terminals and represents the upper limit of voltage seen by downstream circuitry during a full-power transient event. The P6KE27 maintains this clamping performance across its specified operating temperature range and is validated per ANSI/IEEE C62.35 test methods.

Is the P6KE27 suitable for automotive applications?

Yes - the P6KE27H variant is explicitly AEC-Q101 qualified for automotive use, meeting stress testing requirements for temperature cycling, humidity, mechanical shock, and accelerated life. Standard P6KE27 is not AEC-Q101 certified; designers must specify the "H" suffix (e.g., P6KE27H) to receive the qualified version. The P6KE27H is deployed in body control modules, lighting ECUs, and infotainment power rails where transient immunity is critical.

What is the difference between P6KE27 and P6KE27A?

The P6KE27A features tighter breakdown voltage tolerance: 25.7–28.4 V (vs. 24.3–29.7 V for P6KE27) at 1 mA test current, with a correspondingly higher stand-off voltage of 23.1 V (vs. 21.8 V). Both share identical package, power rating, and clamping performance. The P6KE27A is preferred in precision 24 V systems where margin between V_WM and nominal rail voltage must be maximized to avoid leakage-related power loss.

Can the P6KE27 be used in bidirectional configurations?

No - the P6KE27 is a unidirectional TVS diode, intended for DC circuits with defined polarity. For bidirectional protection (e.g., AC lines or differential data buses), the CA-suffixed variant (P6KE27CA) or dedicated bidirectional part like P6KE27C must be used. Using P6KE27 in reverse-biased AC applications risks catastrophic failure due to lack of symmetrical avalanche capability.

What is the thermal derating behavior of the P6KE27 above 25°C ambient?

The P6KE27's peak pulse power rating decreases linearly above 25°C ambient, following the derating curve in Figure 2 of the datasheet: at 75°C, it retains ~70% of its 600 W rating (~420 W), and at 125°C, ~40% (~240 W). Its steady-state power dissipation is rated at 5 W at 75°C with 9.5 mm lead length and 5×5 mm copper pads - thermal design must account for both pulse and continuous power contributions to avoid junction overheating.