Taiwan Semiconductor Corporation BZW06-48H

Overview

BZW06-48H from Taiwan Semiconductor is a unidirectional 600W Transient Voltage Suppressor (TVS) diode with a 47.8V working stand-off voltage, 53.2–58.8V breakdown range at 1mA, and 77.0V clamping voltage at 7.8A (10/1000μs). It features AEC-Q101 qualification, low dynamic impedance, and sub-1ps response time for automotive ESD and load-dump protection.

For engineers reviewing the BZW06-48H datasheet, BZW06-48H pinout, BZW06-48H application, or BZW06-48H equivalent, this device serves as a high-reliability transient suppressor in automotive power rails, industrial sensor interfaces, and DC-DC converter input stages where robust 600W surge immunity and AEC-Q101 compliance are required.

Technical Context

The BZW06-48H operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR (min 53.2V), clamping transients to ≤77.0V at 7.8A peak pulse current. Its DO-204AC (DO-15) package supports lead-free soldering and meets JESD201 Class 2 whisker resistance.

Thermal performance includes 60°C/W junction-to-lead and 100°C/W junction-to-ambient resistance, enabling operation from –55°C to +175°C. It delivers <1μA leakage above 10V and exhibits a temperature coefficient of 0.103%/°C for VBR stability across temperature.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, cathode-banded unidirectional configuration. RoHS-compliant, halogen-free molding compound rated UL 94V-0; pure tin-plated leads meet J-STD-002 solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ48A and P6SMB48A, the BZW06-48H provides verified AEC-Q101 qualification, DO-204AC mechanical robustness for through-hole mounting, and tighter VBR tolerance-making it the sole choice for safety-critical 48V automotive subsystems requiring long-term field reliability.

Availability

BZW06-48H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor protection, and DC-DC converter input stages requiring stable component supply and full AEC-Q101 traceability.

Supply support for BZW06-48H 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 MOSFETs for automotive, industrial, and computing markets.

The BZW06 series was designed specifically for high-energy transient suppression in 12V–48V automotive electrical systems, emphasizing AEC-Q101 compliance, low clamping ratio, and thermal resilience under under-hood conditions.

FAQ

What is the clamping voltage of the BZW06-48H at its rated peak pulse current?

The BZW06-48H has a maximum clamping voltage (VC) of 77.0 V at a peak pulse current (IPPM) of 7.8 A under the 10/1000μs waveform condition. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during surge events. The BZW06-48H maintains this clamping performance across its specified operating temperature range, making it suitable for demanding automotive environments where voltage excursions must be tightly bounded.

Is the BZW06-48H suitable for bidirectional transient protection?

No, the BZW06-48H is a unidirectional TVS diode, indicated by its single cathode band marking and specification table listing only unidirectional VBR values. For bidirectional protection, the BZW06-48BH variant must be used. Using the BZW06-48H in a bidirectional configuration risks failure during positive-going transients on the anode side, as it lacks symmetrical avalanche characteristics. Always verify polarity marking and datasheet designation before layout placement.

Does the BZW06-48H meet AEC-Q101 requirements for automotive use?

Yes, the "H" suffix in BZW06-48H explicitly denotes AEC-Q101 qualification per Taiwan Semiconductor's ordering information. This includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and ESD per JESD22-A114. The BZW06-48H is approved for use in automotive powertrain, chassis, and body electronics where component-level reliability validation is mandatory. Documentation of test reports is available upon request for OEM qualification packages.

What is the thermal resistance profile of the BZW06-48H in standard PCB mounting?

The BZW06-48H exhibits a junction-to-lead thermal resistance (RθJL) of 60°C/W and junction-to-ambient resistance (RθJA) of 100°C/W when mounted with 9.5mm lead lengths per JESD51-2. These values assume standard FR-4 PCB with minimum copper pour; actual RθJA improves with thermal relief pads or copper planes. For sustained surge duty cycles, thermal design must ensure TJ remains ≤175°C using these parameters-critical for under-hood applications where ambient temperatures exceed 105°C.

How does the BZW06-48H compare to standard SMAJ48A in terms of surge handling?

The BZW06-48H offers identical 600W peak pulse power and comparable clamping voltage (77.0V vs. 70V for SMAJ48A), but differs in package (DO-204AC vs. DO-214AC), qualification (AEC-Q101 vs. commercial), and mounting method (through-hole vs. SMD). The BZW06-48H's axial leads provide higher mechanical retention in vibration-prone automotive harnesses, while SMAJ48A suits space-constrained PCBs. Both require appropriate trace width and grounding for effective energy dissipation, but only the BZW06-48H carries automotive-grade certification.