Taiwan Semiconductor Corporation BZW06-342BH

Overview

BZW06-342BH from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode with a working stand-off voltage of 342 V, breakdown voltage of 380–420 V at 1 mA, and clamping voltage of 548 V at 1.3 A (10/1000 μs). It features low dynamic impedance, <1 μA reverse leakage above 10 V, and AEC-Q101 qualification for automotive-grade reliability. It protects power rails and interface lines in high-voltage industrial and automotive systems.

For engineers reviewing the BZW06-342BH datasheet, BZW06-342BH pinout, BZW06-342BH application, or BZW06-342BH equivalent, key selection criteria include its DO-204AC (DO-15) package, unidirectional polarity, 175°C max junction temperature, 600W peak pulse power rating, and AEC-Q101 qualification status - all critical for ESD and surge protection in harsh environments.

Technical Context

The BZW06-342BH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 380–420 V breakdown range. Its clamping action limits transient-induced overvoltage to ≤548 V under 1.3 A (10/1000 μs), enabling robust protection of downstream MOSFETs, controllers, and sensors.

Thermal performance is defined by a junction-to-lead resistance of 60°C/W and junction-to-ambient resistance of 100°C/W (L = 10 mm), supporting reliable operation up to 175°C junction temperature. It exhibits fast response (<1.0 ps from 0 V to V_BR) and meets JESD201 Class 2 whisker resistance and RoHS/halogen-free compliance.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with cathode band 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 SMBJ340A and P6SMB350A, the BZW06-342BH offers through-hole DO-204AC mounting, AEC-Q101 qualification, and superior thermal performance (R_θJL = 60°C/W), making it preferred for high-reliability automotive and industrial power-line protection where mechanical robustness and thermal margin are critical.

Availability

BZW06-342BH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC power rail clamping, and high-voltage sensor interface circuits requiring stable component supply and long-term lifecycle support.

Supply support for BZW06-342BH 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 thyristors, with global distribution and AEC-Q101-compliant product lines.

The BZW06 series is designed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing rugged packaging, precise voltage grading, and validated reliability under harsh thermal and electrical stress.

FAQ

What is the polarity configuration of the BZW06-342BH?

The BZW06-342BH is a unidirectional TVS diode, marked with a cathode band indicating the clamping terminal. It conducts only during reverse overvoltage events on the cathode side and remains non-conductive under forward bias - essential for protecting positive-rail systems like automotive 24 V or industrial 342 V DC buses. This polarity ensures predictable clamping behavior without interfering with normal circuit operation.

Does the BZW06-342BH meet AEC-Q101 requirements?

Yes, the BZW06-342BH is explicitly AEC-Q101 qualified, as confirmed by the "H" suffix in its ordering code and documentation in Taiwan Semiconductor's BZW06 series datasheet (Version K2105). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for automotive electronic control units and under-hood applications where reliability is mission-critical.

What is the maximum clamping voltage for the BZW06-342BH under standard surge conditions?

The BZW06-342BH has a maximum clamping voltage (V_C) of 548 V when subjected to a 1.3 A peak pulse current with a 10/1000 μs waveform - corresponding to its full 600W surge rating. This value is measured per JEDEC standards and guarantees that protected downstream components experience no more than 548 V during worst-case transient events, provided layout minimizes parasitic inductance.

Can the BZW06-342BH be used in bidirectional configurations?

No, the BZW06-342BH is strictly unidirectional. For bidirectional protection, Taiwan Semiconductor offers the BZW06-342BH's counterpart BZW06-342B (with "B" suffix), which uses a back-to-back diode structure. Using the BZW06-342BH in bidirectional roles risks failure during positive transients, as it lacks symmetrical clamping capability - always match part suffix to required polarity.

What is the thermal resistance profile of the BZW06-342BH?

The BZW06-342BH has a junction-to-lead thermal resistance (R_θJL) of 60°C/W and a junction-to-ambient resistance (R_θJA) of 100°C/W with 10 mm lead length. These values enable effective heat dissipation in through-hole mounted applications, supporting continuous operation up to 175°C junction temperature - critical for sustained surge duty cycles in engine control or industrial motor drive environments.