Taiwan Semiconductor Corporation BZW06-342H

Overview

BZW06-342H from Taiwan Semiconductor is a unidirectional 600W Transient Voltage Suppressor (TVS) diode with a 342V working stand-off voltage, 380–420V breakdown range at 1mA, and 548V clamping voltage at 1.3A (10/1000μs). It features AEC-Q101 qualification, low dynamic impedance, and sub-1ps response time, designed for automotive ESD and inductive load surge protection in power electronics.

For engineers reviewing the BZW06-342H datasheet, BZW06-342H pinout, BZW06-342H application, or BZW06-342H equivalent, key selection criteria include its DO-204AC (DO-15) package, 175°C max junction temperature, 0.110%/°C VBR temperature coefficient, and compliance with RoHS and halogen-free standards per IEC 61249-2-21.

Technical Context

The BZW06-342H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 380–420V breakdown threshold. Its clamping action limits transient energy to ≤548V at 1.3A (10/1000μs), with thermal resistance of 60°C/W (junction-to-lead) and 100°C/W (junction-to-ambient).

It delivers 600W non-repetitive peak pulse power under standardized 10/1000μs waveform conditions, supports 100A forward surge current (8.3ms half-sine), and maintains <1μA leakage above 342V - enabling reliable overvoltage protection in high-reliability automotive and industrial DC power rails.

Key Specifications

Pinout & Package

DO-204AC (DO-15) package with axial leads: cathode indicated by band-marked end; anode is unmarked lead. Lead finish is pure tin, solderable per J-STD-002; polarity is unidirectional only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ350A and P6SMB350A, the BZW06-342H provides AEC-Q101 qualification, DO-204AC axial-leaded form factor for through-hole reliability, and guaranteed <1μA leakage - making it the preferred choice for automotive and high-reliability industrial deployments requiring traceable, certified surge protection.

Availability

BZW06-342H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive snubbing, and LED driver overvoltage clamping requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for BZW06-342H 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 engineered specifically for high-energy transient suppression in harsh-environment applications, emphasizing AEC-Q101 compliance, tight parametric tolerances, and robust thermal performance in axial-leaded packages.

FAQ

What is the maximum clamping voltage of the BZW06-342H under standard 10/1000μs surge conditions?

The BZW06-342H has a maximum clamping voltage (V_C) of 548 V when subjected to a 1.3 A peak pulse current with a 10/1000μs waveform. This value is measured per JEDEC standards and ensures predictable voltage limiting during surge events. The BZW06-342H maintains this clamping performance across its full operating temperature range, supporting reliable protection in automotive and industrial applications where voltage overshoot must be tightly controlled.

Is the BZW06-342H qualified for automotive applications?

Yes, the BZW06-342H is explicitly AEC-Q101 qualified, as indicated by the "H" suffix in its ordering code. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness - confirming suitability for under-hood and body electronics. The BZW06-342H's 175°C maximum junction temperature and low leakage (<1μA at 342V) further validate its readiness for automotive deployment, distinguishing it from non-qualified variants in the same series.

What package type does the BZW06-342H use, and what are its mechanical highlights?

The BZW06-342H uses the DO-204AC (DO-15) axial-leaded package, featuring pure tin-plated leads compliant with J-STD-002 solderability requirements and passing JESD 201 Class 2 whisker testing. Its molding compound meets UL 94V-0 flammability rating, and the device weighs approximately 0.400 g. The cathode is marked with a band, and polarity is unidirectional - critical for correct placement in DC power rail protection circuits using the BZW06-342H.

How does the temperature coefficient affect the BZW06-342H's breakdown voltage in real-world operation?

The BZW06-342H has a V_BR temperature coefficient of +0.110 %/°C, meaning its breakdown voltage increases linearly with junction temperature. At 125°C ambient (with self-heating), V_BR may rise ~11% above its 25°C value (380–420V), extending the clamping threshold. This behavior is factored into design margins for automotive applications, and the BZW06-342H's specified 175°C T_JMAX ensures stable operation even under sustained thermal stress - a key advantage over lower-rated TVS diodes in the same family.

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

No, the BZW06-342H is a unidirectional TVS diode and is not rated for bidirectional operation. Its datasheet specifies only unidirectional parameters (e.g., sub-1ps response time, V_BR min/max at 1mA), and the marking diagram confirms cathode-band polarity. For bidirectional protection, Taiwan Semiconductor offers the BZW06-342BH variant - a separate part with symmetrical breakdown characteristics. Using the BZW06-342H in reverse-biased AC or floating configurations risks failure or undefined clamping behavior.