Taiwan Semiconductor Corporation BZW06-37BH

Overview

BZW06-37BH from Taiwan Semiconductor is a unidirectional 600W Transient Voltage Suppressor (TVS) diode with a working stand-off voltage of 36.8 V, breakdown voltage range 40.9–45.2 V at 1 mA, and clamping voltage of 59.3 V at 10.1 A (10/1000 µs). It features AEC-Q101 qualification, low dynamic impedance, and sub-1 ps response time, deployed for automotive ESD and inductive load protection.

For engineers reviewing the BZW06-37BH datasheet, BZW06-37BH pinout, BZW06-37BH application, or BZW06-37BH equivalent, key selection criteria include its DO-204AC (DO-15) package, unidirectional polarity, 175°C max junction temperature, and compliance with automotive reliability standards including JESD201 Class 2 whisker testing and RoHS/halogen-free requirements.

Technical Context

The BZW06-37BH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified V_BR (min 40.9 V), clamping transients to ≤59.3 V at 10.1 A. Its thermal design relies on R_θJL = 60°C/W and R_θJA = 100°C/W, enabling sustained operation up to T_J = 175°C.

It delivers 600 W peak pulse power per 10/1000 µs waveform, with <1 µA reverse leakage above 10 V and a temperature coefficient of 0.101%/°C for V_BR. Polarity is marked by cathode band; terminals are pure tin-plated for J-STD-002 solderability.

Key Specifications

Pinout & Package

DO-204AC (DO-15) package: axial-leaded, epoxy-molded, cathode indicated by band marking. Leads are pure tin-plated, compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TVS diode applications.

Compared with SMBJ36A and P6SMB36A, the BZW06-37BH offers AEC-Q101 qualification and halogen-free construction in a DO-15 package-critical for automotive OEMs requiring full material compliance and extended temperature reliability-but requires axial PCB layout versus surface-mount alternatives.

Availability

BZW06-37BH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, LED driver overvoltage clamping, and DC power supply surge suppression requiring stable component supply and long-term lifecycle support.

Supply support for BZW06-37BH 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 device manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.

The BZW06 series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for harsh-environment transient suppression in automotive power distribution, body control modules, and ADAS subsystems.

FAQ

What does the "H" suffix in BZW06-37BH signify?

The "H" suffix in BZW06-37BH indicates AEC-Q101 qualification-verified reliability testing for automotive applications including temperature cycling, humidity bias, mechanical shock, and board-level vibration. This distinguishes it from standard BZW06-37B, which lacks formal automotive qualification. The BZW06-37BH maintains identical electrical specs but adds traceability, lot-level test data, and extended temperature validation per AEC-Q101 Rev D.

Is BZW06-37BH unidirectional or bidirectional?

BZW06-37BH is a unidirectional TVS diode, designed to clamp only reverse-polarity transients. Its cathode is marked with a band, and it conducts in forward bias like a standard rectifier during positive surges. Unlike bidirectional variants (e.g., BZW06-37B), the BZW06-37BH does not protect against both polarities-making it ideal for DC power rail protection where polarity is fixed and forward conduction must be preserved.

What is the maximum peak pulse current the BZW06-37BH can handle?

The BZW06-37BH handles a maximum peak pulse current of 10.1 A under the 10/1000 µs waveform, corresponding to its 600 W peak pulse power rating. At this current, clamping voltage is guaranteed ≤59.3 V. For 8/20 µs surges (e.g., IEC 61000-4-5), it supports 75.0 A with clamping ≤75.0 V-enabling robust protection against lightning-induced surges in industrial power inputs.

Can BZW06-37BH replace BZW06-36BH in an existing design?

Yes, BZW06-37BH can replace BZW06-36BH if the system's working voltage margin allows. BZW06-37BH has V_WM = 36.8 V vs. BZW06-36BH's 35.8 V, and V_BR min = 40.9 V vs. 39.8 V-providing slightly higher standoff and breakdown thresholds. No PCB changes are needed as both share DO-204AC (DO-15) packaging, identical pinout, and thermal characteristics; verify that the 1.0 V increase does not compromise clamping margin in your specific transient profile.

Does BZW06-37BH meet halogen-free requirements?

Yes, BZW06-37BH is halogen-free per IEC 61249-2-21 and RoHS-compliant. Its molding compound contains no chlorine or bromine-based flame retardants, satisfying strict environmental mandates for automotive Tier 1 suppliers and export-controlled industrial equipment. This is confirmed in the official Taiwan Semiconductor product documentation (Version K2105) and applies specifically to the BZW06-37BH variant-not all BZW06 series parts.