Taiwan Semiconductor Corporation BZW06-31BH

Overview

BZW06-31BH from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode with a 30.8V working stand-off voltage, 34.2–37.8V breakdown range at 1mA, and 49.9V clamping voltage at 12A (10/1000μs). It features AEC-Q101 qualification, low dynamic impedance, and sub-1ps response time, designed for automotive-grade ESD and inductive load surge protection in power supply rails and signal lines.

For engineers reviewing the BZW06-31BH datasheet, BZW06-31BH pinout, BZW06-31BH application, or BZW06-31BH equivalent, key selection criteria include its DO-204AC (DO-15) package, unidirectional polarity, 175°C max junction temperature, and compliance with JESD201 Class 2 whisker resistance and RoHS/halogen-free requirements.

Technical Context

The BZW06-31BH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR (min 34.2V), clamping transients to ≤49.9V at 12A peak pulse current. Its thermal design supports 60°C/W junction-to-lead resistance and 100°C/W junction-to-ambient under defined lead conditions.

It delivers 600W non-repetitive peak pulse power per 10/1000μs waveform, with <1μA leakage above 10V and a temperature coefficient of 0.099%/°C for VBR - enabling stable clamping across -55°C to +175°C operating junction range.

Key Specifications

Pinout & Package

DO-204AC (DO-15) axial-leaded package with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and pass JESD201 Class 2 whisker testing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ33A and P6KE33A, the BZW06-31BH provides verified AEC-Q101 qualification, lower leakage (<1μA), and halogen-free construction - making it the only option qualified for automotive powertrain and chassis modules requiring long-term reliability under thermal cycling and vibration stress.

Availability

BZW06-31BH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and LED lighting systems requiring stable component supply with full AEC-Q101 traceability and green compliance.

Supply support for BZW06-31BH 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 ISO/TS 16949-certified automotive production lines.

The BZW06 series was engineered specifically for high-reliability automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, robust thermal performance, and stringent material compliance - targeting under-hood, power rail, and interface protection applications.

FAQ

What does the "H" suffix in BZW06-31BH signify?

The "H" suffix in BZW06-31BH indicates full AEC-Q101 qualification - confirmed through accelerated stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST). This certification validates the BZW06-31BH for use in automotive powertrain and safety-critical systems where reliability under thermal and mechanical stress is mandatory.

Is BZW06-31BH unidirectional or bidirectional?

The BZW06-31BH is a unidirectional TVS diode, as confirmed by its single cathode band marking, absence of bidirectional VBR specification in the datasheet table, and listing under "Uni" column only. It conducts only in reverse bias above VBR and blocks forward current - making it suitable for DC rail protection where polarity is fixed, unlike bidirectional variants such as BZW06-31B.

What is the clamping voltage of BZW06-31BH at 12A peak pulse current?

The clamping voltage of BZW06-31BH is 49.9 V at 12 A peak pulse current under the standard 10/1000 μs waveform, as specified in the "Clamping Voltage @ IPPM (10/1000us)" column of the electrical characteristics table. This value defines the maximum voltage seen by downstream components during a 600W transient event and is measured with device junction at 25°C.

Can BZW06-31BH replace P6KE33A in existing designs?

BZW06-31BH shares the same DO-204AC (DO-15) package and similar electrical parameters (VWM=30.8V vs. 33V, VC=49.9V vs. 53.3V), but is not a drop-in replacement due to stricter AEC-Q101 qualification, lower leakage (<1μA vs. 5μA), and halogen-free construction. Redesign verification is recommended if substituting into legacy P6KE33A layouts, especially for automotive applications requiring certified reliability.

What is the maximum junction temperature rating for BZW06-31BH?

The maximum junction temperature rating for BZW06-31BH is +175°C, as stated in the Absolute Maximum Ratings table. This allows sustained operation in high-temperature environments such as automotive engine compartments or industrial motor drives, provided thermal design meets the specified RθJL = 60°C/W and layout maintains adequate copper pour and lead length per datasheet guidelines.