Taiwan Semiconductor Corporation P6KE75AH

Overview

P6KE75AH 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 nominal breakdown voltage of 75 V, clamps transients to ≤103 V at 6.1 A peak surge current, exhibits <1 μA reverse leakage at 64.1 V stand-off voltage, and uses a DO-204AC (DO-15) axial package - widely deployed in automotive body electronics and industrial power supply input stages.

For engineers reviewing the P6KE75AH datasheet, P6KE75AH pinout, P6KE75AH application, or P6KE75AH equivalent, key selection criteria include its AEC-Q101 qualification, 10/1000 μs surge rating, low dynamic impedance, fast sub-nanosecond response to ESD events, and compatibility with lead-free reflow and wave soldering per J-STD-002.

Technical Context

The P6KE75AH operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its minimum breakdown threshold of 71.3 V (tested at 1 mA). Its clamping action limits transient energy to ≤103 V at 6.1 A peak pulse current under standardized 10/1000 μs waveform conditions, enabling robust protection of downstream MOSFETs, regulators, and microcontrollers.

Thermal performance is defined by a 175 °C maximum junction temperature and derating curves supporting continuous operation up to 75 °C ambient when mounted on 5 × 5 mm copper pads. Its DO-204AC package delivers mechanical reliability via UL 94V-0 molding compound and pure tin-plated leads compliant with JESD 201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with cathode band marking. Dimensions conform to JEDEC DO-15 standard: overall length 4.2–5.2 mm, diameter 2.3–2.7 mm, lead spacing 2.54 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ75A and 1.5KE75A, the P6KE75AH offers optimal balance of AEC-Q101 qualification, axial through-hole mounting, and tight 103 V clamping - making it preferred for automotive and industrial designs requiring proven reliability and legacy-compatible assembly.

Availability

P6KE75AH is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, LED driver protection, and medical auxiliary power rails requiring stable component supply across multi-year production cycles.

Supply support for P6KE75AH 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 devices, and automotive-grade components.

The P6KE series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for harsh-environment overvoltage protection in automotive power distribution, industrial controls, and lighting systems.

FAQ

What is the key difference between P6KE75AH and P6KE75A?

The P6KE75AH is the AEC-Q101 qualified version of the P6KE75A, with additional stress testing per automotive reliability standards including temperature cycling, humidity bias HAST, and accelerated life testing. Both share identical electrical specs - 71.3–78.8 V V_BR, 64.1 V V_WM, and 103 V V_C - but only the P6KE75AH carries the "H" suffix denoting automotive qualification. The P6KE75AH is recommended for under-hood and chassis-mounted applications where qualification evidence is contractually required.

Can P6KE75AH be used in bidirectional configurations?

No - the P6KE75AH is unidirectional and must be installed with cathode toward the protected line. Bidirectional protection requires a CA-suffixed part like P6KE75CA, which contains two opposing diodes in series. Using P6KE75AH in reverse-biased mode risks permanent breakdown due to lack of symmetrical avalanche structure, and its datasheet specifies parameters only for forward conduction and reverse clamping.

What is the maximum allowable surge current for P6KE75AH at 85°C ambient?

At 85°C ambient, the P6KE75AH's peak pulse power is derated to approximately 420 W based on Fig.2 of the datasheet, corresponding to a maximum peak surge current of ~4.3 A (calculated using V_C = 103 V and P = I × V). This reflects thermal limitation of the DO-204AC package; sustained operation above 75°C ambient requires layout enhancements such as increased copper area or forced airflow to maintain junction temperature ≤175°C.

Does P6KE75AH meet IEC 61000-4-5 surge immunity requirements?

Yes - the P6KE75AH's 600 W rating at 10/1000 μs waveform directly supports IEC 61000-4-5 Level 3 (2 kV line-to-earth, 1 kV line-to-line) and Level 4 (4 kV line-to-earth, 2 kV line-to-line) when properly implemented with appropriate series impedance. Its 103 V clamping voltage ensures protected circuits remain within safe operating limits during standardized surge testing, provided PCB layout minimizes inductance in the clamping path.

Is P6KE75AH compatible with lead-free reflow soldering processes?

Yes - the P6KE75AH features pure tin-plated leads qualified per J-STD-002 and withstands peak reflow temperatures up to 260 °C for 10 seconds. Its DO-204AC package is rated for both wave and reflow soldering; however, axial lead forming must precede soldering to avoid mechanical stress on the epoxy body, and post-solder cleaning is not recommended due to potential moisture ingress into the molded case.