Taiwan Semiconductor Corporation P6KE16CAH

Overview

P6KE16CAH from Taiwan Semiconductor is a bidirectional 600W transient voltage suppressor (TVS) diode designed for robust overvoltage protection in automotive and industrial power rails. It features a 16V nominal breakdown voltage (VBR min/max: 14.4V–17.6V), 12.9V stand-off voltage (VWM), clamps to ≤23.5V at 26A peak surge current, and is AEC-Q101 qualified for automotive-grade reliability.

For engineers reviewing the P6KE16CAH datasheet, P6KE16CAH pinout, P6KE16CAH application, or P6KE16CAH equivalent, key selection criteria include its DO-15 package compatibility, bidirectional clamping behavior, 175°C junction temperature rating, low dynamic impedance, and fast response time (<5.0ns for bidirectional transients).

Technical Context

The P6KE16CAH operates as a silicon avalanche diode with symmetrical bidirectional clamping-no polarity sensitivity-enabling protection of AC-coupled or floating signal/power lines. Its 10/1000μs surge waveform rating of 600W defines its energy-handling capability under standardized lightning/inductive-spike conditions.

It exhibits low leakage (<1μA at 12.9V), a temperature coefficient of VBR at 0.086%/°C, and is rated for operation from –55°C to +175°C. The device uses a single-die DO-204AC (DO-15) package with pure tin-plated leads compliant with J-STD-002 solderability standards.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, molded plastic case with UL 94V-0 flammability rating. Cathode band marking not applicable - bidirectional configuration has no polarity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ16CA and 1.5KE16CA, the P6KE16CAH offers optimal balance of AEC-Q101 qualification, DO-15 through-hole manufacturability, and precise 600W surge matching-making it ideal for cost-sensitive, high-volume automotive and industrial control designs where qualification and form factor are decisive.

Availability

P6KE16CAH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, and LED driver surge suppression requiring stable component supply across multi-year production cycles.

Supply support for P6KE16CAH 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 AEC-Q101-qualified TVS portfolio, engineered specifically for harsh-environment overvoltage protection in automotive power systems and industrial automation equipment.

FAQ

What does the "CA" suffix indicate in P6KE16CAH?

The "CA" suffix in P6KE16CAH denotes bidirectional configuration - meaning the device provides symmetrical clamping in both forward and reverse directions, unlike unidirectional "A" variants. This eliminates polarity concerns during placement and enables protection of AC-coupled or floating nodes. The P6KE16CAH maintains identical electrical specs (VBR, VC, PPK) as its unidirectional counterparts but functions identically regardless of terminal orientation.

Is P6KE16CAH suitable for protecting RS-485 communication lines?

Yes, P6KE16CAH is widely deployed for RS-485 bus protection due to its bidirectional clamping, fast 5.0 ns response, and ability to clamp common-mode transients up to 23.5V. Its DO-15 package allows direct placement between A/B lines and ground or across differential pairs. When used per TI SN65HVDxx layout guidelines, the P6KE16CAH helps RS-485 transceivers meet IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements without compromising data integrity.

How does the AEC-Q101 qualification of P6KE16CAH impact its use in non-automotive applications?

The AEC-Q101 qualification of P6KE16CAH validates its robustness under extreme thermal cycling, high-temperature reverse bias, and mechanical shock - making it exceptionally reliable even in demanding non-automotive settings like outdoor industrial controls or renewable energy inverters. Engineers selecting P6KE16CAH for such applications gain built-in margin for long-term field stability, reduced infant mortality, and simplified qualification effort compared to standard-grade TVS diodes.

What is the maximum allowable mounting pad size for P6KE16CAH per its thermal derating curve?

Per the P6KE16CAH datasheet, steady-state power dissipation (PD) is rated at 5 W when mounted on 5 mm × 5 mm copper pads per lead - the reference condition for Fig.2 derating. Using smaller pads increases thermal resistance and accelerates power derating above 25°C ambient. For sustained 5 W operation, maintain minimum 5×5 mm² Cu area per terminal; reduce applied power linearly if pad size is reduced or ambient exceeds 75°C.

Can P6KE16CAH replace P6KE16A in an existing design?

No - P6KE16CAH and P6KE16A are not interchangeable. P6KE16A is unidirectional (cathode-banded), while P6KE16CAH is bidirectional (no polarity marking). Substituting one for the other may result in incorrect clamping behavior - e.g., failure to protect reverse-polarity transients or unintended conduction in DC circuits. Always verify circuit topology: use P6KE16CAH only where symmetrical clamping is required, and retain P6KE16A for polarized DC rail protection.