Taiwan Semiconductor Corporation BZW06-33BH

Overview

BZW06-33BH from Taiwan Semiconductor is a unidirectional 600W Transient Voltage Suppressor (TVS) diode with a 33.3V working stand-off voltage, 37.1–47.0V breakdown range at 1mA, and 53.9V clamping voltage at 11.1A (10/1000μs). It features AEC-Q101 qualification, low dynamic impedance, and sub-1ps response time, deployed for automotive ESD and load-dump protection in power supply rails.

For engineers reviewing the BZW06-33BH datasheet, BZW06-33BH pinout, BZW06-33BH application, or BZW06-33BH equivalent, key selection criteria include its DO-204AC (DO-15) package, unidirectional polarity, 175°C max junction temperature, and compliance with IEC 61249-2-21 halogen-free standards - critical for under-hood automotive electronics design.

Technical Context

The BZW06-33BH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR min of 37.1V. Its clamping action limits transient energy to ≤53.9V at 11.1A, enabling robust protection against ISO 7637-2 load dump and IEC 61000-4-2 ESD events without latch-up or thermal runaway.

Thermal performance is defined by R_θJL = 60°C/W and R_θJA = 100°C/W, supporting sustained operation up to 175°C junction temperature. The device exhibits <1μA leakage at 33.3V and a temperature coefficient of +0.100%/°C for VBR, ensuring predictable voltage drift across automotive ambient ranges.

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, J-STD-002 solderable. Weight: 0.400 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ33A and P6KE33A, the BZW06-33BH delivers superior thermal performance (R_θJA = 100°C/W), guaranteed AEC-Q101 qualification, and lower leakage - making it the preferred choice for thermally constrained, automotive-grade transient suppression where long-term reliability is non-negotiable.

Availability

BZW06-33BH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and LED lighting driver surge suppression requiring stable component supply and full AEC-Q101 traceability.

Supply support for BZW06-33BH 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, with global distribution and AEC-Q101-qualified product lines.

The BZW06 series was designed specifically for high-reliability automotive and industrial transient suppression, emphasizing robust surge handling, tight parametric tolerances, and extended temperature operation - directly addressing ISO 16750 and IEC 61000-4-x compliance requirements.

FAQ

What is the polarity configuration of the BZW06-33BH?

The BZW06-33BH is a unidirectional TVS diode, with cathode marked by a band on the DO-204AC (DO-15) package. It conducts only during reverse-biased overvoltage events, making it ideal for DC rail protection where polarity is fixed. This differs from bidirectional variants like BZW06-33BH's counterpart BZW06-33B, which lacks polarity marking and handles AC or reversible transients.

Does the BZW06-33BH meet AEC-Q101 requirements?

Yes, the "H" suffix in BZW06-33BH explicitly denotes AEC-Q101 qualification. Taiwan Semiconductor subjects this part to stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114, confirming suitability for automotive powertrain and body electronics applications per AEC-Q101 Rev D.

What is the maximum clamping voltage of the BZW06-33BH under standard test conditions?

The BZW06-33BH has a maximum clamping voltage (V_C) of 53.9 V at a peak pulse current (I_PPM) of 11.1 A using the 10/1000μs waveform. This value is measured per JEDEC standards and represents the upper limit of voltage seen by protected circuitry during a defined surge event - critical for ensuring downstream ICs remain within absolute maximum ratings.

Can the BZW06-33BH be used in place of the BZW06-33B?

No - BZW06-33BH is unidirectional and AEC-Q101 qualified, whereas BZW06-33B is bidirectional and not AEC-Q101 rated. Their electrical characteristics differ: BZW06-33B has symmetric breakdown in both directions and no cathode marking. Substituting them requires verifying polarity, qualification status, and clamping behavior - BZW06-33BH is not a drop-in replacement for BZW06-33B.

What is the thermal resistance from junction to lead (R_θJL) for the BZW06-33BH?

The junction-to-lead thermal resistance (R_θJL) of the BZW06-33BH is 60°C/W, measured under standard mounting conditions with 9.5mm lead length. This low value enables efficient heat transfer from the silicon die to PCB copper or heatsinking leads, supporting reliable operation at elevated ambient temperatures up to 125°C without exceeding the 175°C maximum junction limit.