Taiwan Semiconductor Corporation BZW06-28

Overview

BZW06-28 from Taiwan Semiconductor is a unidirectional 600W Transient Voltage Suppressor (TVS) diode with a 28.2V working stand-off voltage, 31.4–34.7V breakdown range at 1mA, and 45.7V clamping voltage at 13.1A (10/1000μs). It features low dynamic impedance, <1μA reverse leakage above 10V, and AEC-Q101 qualification for automotive-grade surge protection in power supply rails and I/O interfaces.

For engineers reviewing the BZW06-28 datasheet, BZW06-28 pinout, BZW06-28 application, or BZW06-28 equivalent, this page delivers verified electrical parameters, DO-204AC package details, clamping performance under standardized transients, thermal resistance values, and validated alternative parts for ESD and inductive switching protection design.

Technical Context

The BZW06-28 operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its VBR (min 31.4V), limiting transient energy via controlled clamping to 45.7V at 13.1A. Its fast response (<1.0ps from 0V to VBR) ensures protection before downstream IC damage occurs during EFT or lightning-induced surges.

Designed for surface-mount compatibility with DO-204AC (DO-15) packaging, it sustains 600W peak pulse power per 10/1000μs waveform, exhibits 60°C/W junction-to-lead thermal resistance, and maintains stable operation across -55°C to +175°C junction temperature range with ±0.098%/°C VBR temperature coefficient.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with cathode band marking for polarity identification. Lead finish: pure tin, solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ28A and P6KE27A, the BZW06-28 provides tighter clamping (45.7V vs. ≥41.5V), lower leakage (<1μA), and formal AEC-Q101 qualification-making it optimal for new automotive and high-reliability industrial designs requiring long-term surge immunity validation.

Availability

BZW06-28 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver overvoltage clamping, and motor control board surge suppression requiring stable component supply and full AEC-Q101 compliance.

Supply support for BZW06-28 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 for automotive, industrial, and consumer markets.

The BZW06 series was developed specifically for high-energy transient suppression in harsh environments, emphasizing robustness, low clamping voltage, and AEC-Q101 reliability for automotive electronics and industrial control systems.

FAQ

What is the maximum clamping voltage of BZW06-28 under standard 10/1000μs surge conditions?

The BZW06-28 has a maximum clamping voltage (VC) of 45.7 V when subjected to a 13.1 A peak pulse current with a 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during transient events. The BZW06-28 achieves this while maintaining 600 W peak power dissipation capability, making it suitable for demanding automotive and industrial surge protection applications.

Is BZW06-28 AEC-Q101 qualified, and what does that mean for automotive use?

Yes, the BZW06-28 is AEC-Q101 qualified, meaning it has passed rigorous stress tests-including temperature cycling, humidity bias HAST, mechanical shock, and accelerated life testing-specifically designed for discrete semiconductors in automotive applications. This qualification confirms the BZW06-28's suitability for under-hood and chassis-mounted systems where reliability under thermal, vibration, and electrical stress is critical. The BZW06-28 meets these requirements as documented in Taiwan Semiconductor's official qualification report K2105.

What is the difference between BZW06-28 and BZW06-28B?

The BZW06-28 is a unidirectional TVS diode, while the BZW06-28B is its bidirectional counterpart. Both share identical VWM (28.2 V), VBR (31.4–34.7 V), and clamping performance, but the BZW06-28B provides symmetrical protection for AC-coupled or differential signal lines such as RS-485 or CAN bus data pairs. The BZW06-28 requires correct polarity orientation in DC circuits, whereas the BZW06-28B eliminates polarity concerns in bidirectional transient scenarios.

What thermal performance metrics are specified for BZW06-28?

The BZW06-28 specifies a junction-to-lead thermal resistance (RθJL) of 60 °C/W and a junction-to-ambient resistance (RθJA) of 100 °C/W with 10 mm lead length. These values indicate how effectively heat generated during surge events transfers from the silicon junction to the PCB copper or heatsink. With a maximum junction temperature of 175 °C and operating range from –55 °C to +175 °C, the BZW06-28 supports sustained reliability in thermally demanding environments like engine control modules.

Can BZW06-28 be used in place of P6KE28A in existing designs?

The BZW06-28 shares the same DO-204AC (DO-15) package and similar electrical ratings with P6KE28A, including 28 V VWM and 600 W peak power. However, the BZW06-28 offers lower reverse leakage (<1 μA vs. 5 μA), tighter clamping (45.7 V vs. 48.3 V), and AEC-Q101 qualification-making it a functional upgrade rather than a drop-in replacement. Layout changes are not required, but system-level validation of leakage impact and clamping margin is recommended before migration to BZW06-28.