Taiwan Semiconductor Corporation BZW06-70H

Overview

BZW06-70H from Taiwan Semiconductor is a unidirectional 600W Transient Voltage Suppressor (TVS) diode with a 70.1V working stand-off voltage, 77.9–86.1V breakdown voltage range, and 113V clamping voltage at 5.3A (10/1000μs). It features AEC-Q101 qualification, low dynamic impedance, and sub-1ps response time for automotive-grade ESD and load-dump protection in power supply rails.

For engineers reviewing the BZW06-70H datasheet, BZW06-70H pinout, BZW06-70H application, or BZW06-70H equivalent, key selection criteria include its DO-204AC (DO-15) package, 175°C max junction temperature, 60°C/W junction-to-lead thermal resistance, and AEC-Q101 qualification for under-hood automotive systems requiring robust transient immunity.

Technical Context

The BZW06-70H operates as a unidirectional avalanche diode, conducting only during reverse overvoltage events above its VBR threshold while maintaining <1μA leakage at 70.1V. Its clamping behavior is defined by a 10/1000μs waveform with 113V VC at 5.3A, enabling reliable protection of 12V/24V automotive electronics against ISO 7637-2 pulse 1, 2a, and 5a transients.

Thermally, it sustains 600W peak pulse power at TA = 25°C with derating to zero at 175°C junction temperature, supported by RθJL = 60°C/W and RθJA = 100°C/W (L = 10mm). The device uses pure tin-plated leads compliant with J-STD-002 and passes JESD 201 Class 2 whisker testing.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with cathode band marking for unidirectional polarity. 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 SMBJ70A and P6SMB70A, the BZW06-70H provides verified AEC-Q101 qualification, tighter VBR tolerance (±5%), and lower leakage (<1μA), making it the preferred choice for new automotive designs requiring long-term reliability and audit-ready compliance evidence.

Availability

BZW06-70H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input safeguarding, and LED driver overvoltage clamping requiring stable component supply across multi-year production programs.

Supply support for BZW06-70H 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 computing markets.

The BZW06 series was designed specifically for high-energy transient suppression in harsh automotive environments, emphasizing AEC-Q101 reliability, tight parametric consistency, and thermal robustness in axial-leaded packages.

FAQ

What is the clamping voltage of BZW06-70H at 5.3A using the 10/1000μs waveform?

The BZW06-70H has a maximum clamping voltage of 113 V at 5.3 A under the 10/1000 μs standard surge waveform. This value is measured per JEDEC standards and ensures predictable overvoltage limiting for downstream components. The BZW06-70H maintains this clamping performance across its full operating temperature range from –55°C to +175°C, with minimal drift due to its 0.105%/°C VBR temperature coefficient.

Is BZW06-70H suitable for bidirectional transient protection?

No, BZW06-70H is a unidirectional TVS diode intended for DC rail protection with defined anode/cathode polarity. For bidirectional applications such as AC lines or data bus protection, the BZW06-70B variant must be used. The "H" suffix denotes AEC-Q101 qualification but does not alter conduction directionality; the BZW06-70H requires correct orientation during PCB placement to avoid forward conduction during normal operation.

What packaging options are available for BZW06-70H?

BZW06-70H is supplied in DO-204AC (DO-15) package format, available in 3,500-piece tape-and-reel (standard) and 1,500-piece ammo box configurations. The part marking includes the voltage code "70", "H" for AEC-Q101, and date/factory codes per TSC's DO-15 marking diagram. Lead finish is pure tin, compliant with J-STD-002 for reliable solderability.

How does the thermal performance of BZW06-70H compare to surface-mount TVS diodes?

The BZW06-70H offers RθJL = 60°C/W, significantly better than typical SMD TVS devices (e.g., SMBJ series: ~100°C/W), due to its axial-leaded construction enabling direct heat transfer through leads to PCB copper. This makes the BZW06-70H especially effective in high-ambient-temperature environments like engine compartments, where sustained thermal dissipation is critical - a key advantage over many surface-mount alternatives.

Does BZW06-70H meet automotive reliability standards beyond AEC-Q101?

Yes, BZW06-70H meets AEC-Q101 stress test requirements including HTGB, HTRB, TCT, and mechanical shock, and additionally complies with JESD 201 Class 2 whisker resistance and UL 94V-0 flammability for its molding compound. These qualifications confirm suitability for safety-critical automotive subsystems, and the device's 175°C TJ rating exceeds standard AEC-Q100 Grade 0 requirements, supporting extended-life deployments in demanding under-hood applications.