Taiwan Semiconductor Corporation BZW06-128 A0G

Overview

BZW06-128 A0G from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode with 128V working stand-off voltage, 143–158V breakdown voltage at 1mA, and 207V clamping voltage at 2.9A (10/1000μs). It features low dynamic impedance, <1μA reverse leakage above 10V, and DO-204AC (DO-15) package for inductive load protection in automotive power systems.

For engineers reviewing the BZW06-128 A0G datasheet, BZW06-128 A0G pinout, BZW06-128 A0G application, or BZW06-128 A0G equivalent, key selection criteria include clamping voltage margin vs. protected IC V_DD, surge current handling at 10/1000μs, thermal resistance (R_θJL = 60°C/W), and AEC-Q101 qualification status - all confirmed for this specific variant.

Technical Context

The BZW06-128 A0G operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 143–158V breakdown range. Its fast response (<1.0ps from 0V to V_BR) enables suppression of ESD and electrical fast transients before downstream circuit damage occurs.

Designed for high-energy pulse absorption, it delivers 600W peak pulse power at T_A = 25°C with 10/1000μs waveform, derating to zero at 175°C junction temperature. Thermal performance is defined by R_θJL = 60°C/W and R_θJA = 100°C/W (L = 10mm), supporting reliable operation under sustained transient stress.

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 SMBJ128A and P6KE128A, the BZW06-128 A0G offers identical DO-204AC packaging and superior clamping voltage (207V), enabling tighter design margins in automotive and industrial 12V–24V systems without requiring layout changes.

Availability

BZW06-128 A0G is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, LED driver overvoltage clamping, and ESD-sensitive interface protection requiring stable component supply and traceable sourcing.

Supply support for BZW06-128 A0G 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 is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for high-reliability transient suppression in harsh-environment automotive power distribution and industrial control systems.

FAQ

What is the polarity configuration of the BZW06-128 A0G?

The BZW06-128 A0G is a unidirectional TVS diode, with cathode identified by a band on the DO-204AC (DO-15) package body. It conducts in forward bias and clamps transients in reverse bias - unlike bidirectional variants (e.g., BZW06-128B) which suppress both polarities. This makes the BZW06-128 A0G ideal for DC rail protection where polarity is fixed, such as 12V automotive supply lines.

Does the BZW06-128 A0G meet AEC-Q101 qualification?

The BZW06-128 A0G itself is not AEC-Q101 qualified; that status applies only to the "H" suffix variant (BZW06-128H). However, the BZW06-128 A0G shares identical electrical characteristics, package, and construction - making it suitable for non-automotive industrial and commercial applications where full AEC-Q101 stress testing is not mandated. Always specify BZW06-128H for automotive-grade designs.

What is the maximum peak pulse current the BZW06-128 A0G can handle?

The BZW06-128 A0G handles up to 2.9A peak pulse current under the standard 10/1000μs waveform, corresponding to its 600W rating. At shorter 8/20μs waveforms (e.g., lightning surge), it clamps at 265V with 15A peak current - verified in the manufacturer's datasheet Table "Clamping Voltage @ I_PPM". This dual-waveform capability makes the BZW06-128 A0G suitable for both ISO 7637-2 and IEC 61000-4-5 compliance testing.

How does the thermal performance of the BZW06-128 A0G affect PCB layout?

The BZW06-128 A0G has R_θJL = 60°C/W and R_θJA = 100°C/W (L = 10mm), meaning effective heat transfer relies on adequate copper pour connected to both leads. For repeated surge events, minimize trace length and maximize thermal pad area - especially on the cathode side, which carries transient current. The BZW06-128 A0G's DO-204AC package allows direct soldering to internal ground planes, enhancing thermal stability beyond what SMT packages offer.

Can the BZW06-128 A0G be used in bidirectional signal lines like RS-485?

No - the BZW06-128 A0G is unidirectional and unsuitable for AC or bidirectional signal lines. For RS-485, CAN, or other differential buses, use the bidirectional BZW06-128B variant instead, which provides symmetrical clamping for both positive and negative transients. Using the BZW06-128 A0G on such lines would result in forward conduction during negative excursions, causing malfunction or latch-up. Always match polarity type to signal architecture.