Taiwan Semiconductor Corporation BZW06-299

Overview

BZW06-299 from Taiwan Semiconductor is a unidirectional 600W Transient Voltage Suppressor (TVS) diode with a 299V working stand-off voltage, 332–368V breakdown range at 1mA, and 482V clamping voltage at 1.6A (10/1000μs), designed for high-energy surge protection in automotive power rails and industrial control inputs.

For engineers reviewing the BZW06-299 datasheet, BZW06-299 pinout, BZW06-299 application, or BZW06-299 equivalent, key selection criteria include its DO-204AC (DO-15) package, AEC-Q101 qualification option (BZW06-299H), low dynamic impedance, sub-1ps response time, and 175°C max junction temperature-critical for under-hood and high-reliability EFT/ESD immunity designs.

Technical Context

The BZW06-299 operates as a unidirectional avalanche-clamping device, triggered when reverse voltage exceeds its VBR min of 332V, limiting transient energy via rapid junction conduction. Its 600W peak pulse power rating is defined per 10/1000μs waveform, with thermal performance governed by R_θJL = 60°C/W and R_θJA = 100°C/W.

It exhibits <1μA reverse leakage at 299V, a 0.110%/°C temperature coefficient of V_BR, and maintains stable clamping up to T_J = 175°C. Polarity is marked by cathode band; lead finish is pure tin, compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case rated UL 94V-0; cathode indicated by band on unidirectional variant (BZW06-299); weight ≈0.400g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ280A and 1.5KE270A, the BZW06-299 offers superior thermal robustness (R_θJL = 60°C/W), AEC-Q101 qualification path, and tighter V_BR tolerance-making it optimal for automotive and high-reliability industrial deployments where long-term stability under thermal cycling matters.

Availability

BZW06-299 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, LED driver overvoltage clamping, and telecom line interface hardening requiring stable component supply and traceable sourcing.

Supply support for BZW06-299 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 high-energy transient suppression in harsh-environment applications, emphasizing AEC-Q101 compliance, tight parametric distribution, and robust thermal performance in legacy axial packages.

FAQ

What is the maximum clamping voltage of the BZW06-299 under standard test conditions?

The BZW06-299 has a maximum clamping voltage (V_C) of 482 V when subjected to a 1.6 A peak pulse current with a 10/1000 μs waveform. This value is measured at T_A = 25°C and defines the upper voltage limit imposed on protected circuits during surge events. The BZW06-299 maintains this clamping performance across its specified operating temperature range, making it suitable for demanding applications where voltage overshoot must be tightly controlled.

Is the BZW06-299 available in an AEC-Q101 qualified version?

Yes, the AEC-Q101 qualified version of the BZW06-299 is designated BZW06-299H. It undergoes full automotive-grade stress testing including temperature cycling, humidity bias, and accelerated life testing per AEC-Q101 Rev D. The BZW06-299H shares identical electrical specifications with the standard BZW06-299 but adds qualification documentation and traceability required for automotive Tier 1 supply chains.

What package type does the BZW06-299 use, and what are its mechanical highlights?

The BZW06-299 uses the DO-204AC (DO-15) axial-leaded package with a UL 94V-0 rated epoxy molding compound. Its leads are pure tin plated and certified to J-STD-002 for solderability. The device weighs approximately 0.400 g and features a cathode band marking for polarity identification. This package provides higher thermal mass than surface-mount alternatives, supporting sustained power dissipation in high-ambient environments.

How does the BZW06-299 compare to bidirectional TVS diodes in surge protection design?

The BZW06-299 is unidirectional and optimized for DC power line protection where polarity is fixed-such as 24V automotive rails or industrial control inputs. Unlike bidirectional variants (e.g., BZW06-299B), it offers faster response (<1 ps vs. 5 ns) and lower capacitance, reducing signal distortion in high-speed lines. The BZW06-299 should not be used in AC-coupled or polarity-agnostic paths; for those, the BZW06-299B is the appropriate counterpart.

What is the reverse leakage current specification for the BZW06-299 at its working voltage?

The BZW06-299 specifies a maximum reverse leakage current (I_R) of 1 μA when biased at its rated working stand-off voltage of 299 V. This low leakage ensures minimal power loss and avoids loading effects on high-impedance sensing nodes or battery-backed circuits. Measured at T_A = 25°C, leakage remains well below 5 μA even at 125°C, supporting reliable operation in extended temperature ranges.