Taiwan Semiconductor Corporation BZW06-28BH

Overview

BZW06-28BH from Taiwan Semiconductor is an AEC-Q101 qualified unidirectional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, with 28.2 V working stand-off voltage (VWM), 31.4–34.7 V breakdown voltage (VBR), and 600 W peak pulse power rating at 10/1000 µs waveform-designed for automotive-grade ESD and inductive load transient protection in engine control units and body electronics.

For engineers reviewing the BZW06-28BH datasheet, BZW06-28BH pinout, BZW06-28BH application, or BZW06-28BH equivalent, this page delivers verified electrical parameters, thermal performance data, clamping behavior under surge conditions, and AEC-Q101 qualification status to support robust circuit protection design and automotive component selection.

Technical Context

The BZW06-28BH operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its specified VBR range (31.4–34.7 V at 1 mA test current). Its low dynamic impedance ensures rapid voltage clamping during transients, while fast response time (<1.0 ps from 0 V to VBR) enables effective suppression of nanosecond-scale ESD events.

Thermal design is supported by a junction-to-lead thermal resistance (R_θJL) of 60 °C/W and maximum operating junction temperature of +175 °C. It sustains 100 A peak forward surge current (IFSM) and exhibits <1 µA reverse leakage at 28.2 V, enabling stable operation in high-reliability automotive environments.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, cathode-banded end marking for unidirectional polarity. Lead finish: pure tin, solderable per J-STD-002; weight ≈ 0.400 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ28A and P6SMB28A, the BZW06-28BH uniquely combines AEC-Q101 qualification, DO-204AC axial-leaded mechanical robustness, and verified 175 °C junction operation-making it the only option qualified for under-hood automotive deployment where vibration, thermal cycling, and reliability validation are mandatory.

Availability

BZW06-28BH is available at Aetrix Electronics and suitable for automotive engine control units, LED lighting systems, and body electronics requiring stable component supply with full AEC-Q101 compliance and traceable sourcing.

Supply support for BZW06-28BH 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, serving global automotive, industrial, and consumer markets since 1979.

The BZW06 series was developed specifically for AEC-Q101-compliant transient protection in harsh automotive environments, emphasizing high surge robustness, low leakage, and long-term reliability under thermal and mechanical stress.

FAQ

What is the polarity configuration of the BZW06-28BH?

The BZW06-28BH is a unidirectional TVS diode with cathode-band marking indicating the cathode terminal. It conducts in reverse bias above VBR and blocks forward current like a standard rectifier diode. This polarity supports protection of positive-rail signals referenced to ground, such as 12 V or 24 V supply lines and LIN/CAN data lines in automotive systems. The BZW06-28BH must be oriented with the banded end toward the protected line.

Does the BZW06-28BH meet AEC-Q101 requirements for automotive use?

Yes, the BZW06-28BH is explicitly AEC-Q101 qualified, as indicated by the "H" suffix in its ordering code. It has passed stress tests including high-temperature operating life, temperature cycling, humidity bias HAST, and mechanical shock-validating its suitability for under-hood and cabin automotive applications. This qualification is documented in Taiwan Semiconductor's official BZW06 series qualification report (Version K2105).

What is the clamping voltage of the BZW06-28BH at rated surge current?

The BZW06-28BH clamps to a maximum of 45.7 V at 13.1 A peak pulse current under the standard 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that protected downstream components-such as 40 V-rated gate drivers or 36 V-tolerant microcontroller I/O-remain within safe operating limits during surge events. The clamping voltage remains stable across its full operating temperature range (−55 °C to +175 °C).

Can the BZW06-28BH replace the BZW06-28 in existing designs?

Yes, the BZW06-28BH is a direct replacement for the non-AEC-Q101 BZW06-28, sharing identical electrical specifications (VWM = 28.2 V, VBR = 31.4–34.7 V, VC = 45.7 V), DO-204AC package, and pinout. The "H" suffix adds automotive qualification without altering form, fit, or function-enabling drop-in upgrade for designs targeting IATF 16949 compliance or Tier 1 automotive supply chains.

What is the maximum steady-state power dissipation for the BZW06-28BH?

The BZW06-28BH has a steady-state power dissipation (PD) rating of 1.7 W at TL = 75 °C with 9.5 mm lead length. This value reflects continuous DC or low-frequency power handling-not surge capability-and is limited by thermal resistance (R_θJL = 60 °C/W). In normal operation, the device draws negligible current below VWM, so actual power dissipation remains near zero unless triggered.