Taiwan Semiconductor Corporation BZW06-37H

Overview

BZW06-37H from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode with a 36.8V working stand-off voltage, 40.9–45.2V breakdown range at 1mA, and 59.3V clamping voltage at 10.1A (10/1000μs waveform), designed for automotive-grade ESD and inductive load surge protection in power supply rails and signal lines.

For engineers reviewing the BZW06-37H datasheet, BZW06-37H pinout, BZW06-37H application, or BZW06-37H equivalent, key selection criteria include AEC-Q101 qualification, DO-204AC (DO-15) package compatibility, low dynamic impedance, sub-1ps response time, and 175°C maximum junction temperature for under-hood reliability.

Technical Context

The BZW06-37H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR (min 40.9V, typ 43V, max 45.2V at 1mA), clamping transients to ≤59.3V at 10.1A peak pulse current. Its thermal design supports 175°C junction operation with R_θJL = 60°C/W and R_θJA = 100°C/W (L = 10mm).

It delivers 600W non-repetitive peak pulse power per 10/1000μs waveform, with <1μA reverse leakage above 10V and a temperature coefficient of 0.101%/°C - enabling stable clamping across automotive ambient ranges (−55°C to +175°C).

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, cathode-banded end marking, RoHS-compliant pure tin plating, UL 94V-0 molding compound, 0.400g weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ36A and 1.5KE39A, the BZW06-37H uniquely combines AEC-Q101 qualification, DO-204AC compactness, and guaranteed 600W clamping performance - making it the sole drop-in solution for new automotive designs requiring zero qualification overhead and strict emissions compliance.

Availability

BZW06-37H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver surge suppression requiring stable component supply, AEC-Q101 traceability, and DO-204AC packaging consistency.

Supply support for BZW06-37H 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and Zener diodes since 1979.

The BZW06 series was engineered specifically for automotive and industrial transient immunity - emphasizing AEC-Q101 reliability, tight parametric distribution, and robust surge endurance in harsh thermal environments.

FAQ

What does the "H" suffix indicate in BZW06-37H?

The "H" suffix in BZW06-37H denotes full AEC-Q101 qualification - verified through high-temperature operating life, temperature cycling, humidity testing, and mechanical shock per automotive standards. This distinguishes it from standard BZW06-37, which lacks automotive certification and is intended for commercial use only.

Is BZW06-37H unidirectional or bidirectional?

BZW06-37H is a unidirectional TVS diode, as confirmed by its single cathode band marking, absence of "B" suffix (e.g., BZW06-37B), and specification of VBR only for reverse polarity. It conducts only during negative transients relative to its cathode and must be oriented with cathode toward the protected line.

What is the clamping voltage of BZW06-37H at 10A peak pulse current?

The clamping voltage of BZW06-37H is 59.3 V at 10.1 A for the 10/1000μs waveform, per the manufacturer's electrical characteristics table. At exactly 10 A, interpolation yields ≈59.1 V - well within the 59.3 V maximum guarantee, ensuring predictable overvoltage limiting in 36V system designs.

Can BZW06-37H replace BZW06-33H in a 36V circuit?

No - BZW06-33H has VWM = 33.3 V and VBR = 37.1–47.0 V, while BZW06-37H has VWM = 36.8 V and VBR = 40.9–45.2 V. Substituting BZW06-37H raises the clamping threshold, risking insufficient protection margin in circuits designed for tighter 33V standoff. Always match VWM to system nominal voltage.

Does BZW06-37H meet halogen-free requirements?

Yes - BZW06-37H complies with IEC 61249-2-21 for halogen-free materials and is explicitly marked as halogen-free in the official datasheet. Its molding compound contains no brominated or chlorinated flame retardants, satisfying EU and OEM green material mandates.