Taiwan Semiconductor Corporation BZW06-273H

Overview

BZW06-273H from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode with a working stand-off voltage of 273 V, breakdown voltage range 304–336 V at 1 mA, and clamping voltage of 438 V at 1.6 A (10/1000 µs). It features low dynamic impedance, <1 µA reverse leakage above 10 V, and AEC-Q101 qualification for automotive-grade reliability. It protects power rails and interface lines in high-voltage industrial and automotive systems against ESD and inductive switching transients.

For engineers reviewing the BZW06-273H datasheet, BZW06-273H pinout, BZW06-273H application, or BZW06-273H equivalent, key selection criteria include its DO-204AC (DO-15) package, unidirectional polarity, 175°C maximum junction temperature, and verified 600W peak pulse power rating per IEC 61000-4-5 surge testing conditions.

Technical Context

The BZW06-273H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 304–336 V breakdown threshold. Its clamping action limits transient voltages to ≤438 V at 1.6 A (10/1000 µs), with thermal resistance R_θJL = 60 °C/W enabling robust power dissipation under repetitive surges.

Designed for high-energy transients, it delivers fast response (<1.0 ps from 0 V to V_BR), supports steady-state power dissipation up to 1.7 W at T_L = 75°C, and maintains stable performance across –55°C to +175°C operating junction temperature range.

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, solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ270A and 1.5KE270A, the BZW06-273H provides guaranteed AEC-Q101 qualification, halogen-free construction, and lower R_θJL (60 °C/W), making it uniquely suitable for thermally constrained automotive modules requiring long-term reliability under repeated surge stress.

Availability

BZW06-273H is available at Aetrix Electronics and suitable for automotive power management, industrial motor control, LED lighting drivers, and telecom power supply designs requiring stable component supply and AEC-Q101-compliant surge protection.

Supply support for BZW06-273H 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 production.

The BZW06 series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, wide voltage coverage (12.8–376 V), and robust 600W surge handling in the DO-15 package.

FAQ

What is the polarity configuration of the BZW06-273H?

The BZW06-273H is a unidirectional TVS diode, marked with a cathode band indicating the cathode terminal. It conducts in reverse bias during overvoltage events and blocks forward current like a standard rectifier. This polarity enables precise placement on positive rails-such as 24V or 48V systems-where only positive-going transients require suppression. The BZW06-273H datasheet confirms unidirectional operation with V_BR specified at 1 mA and clamping defined for reverse surge conditions.

Is the BZW06-273H suitable for IEC 61000-4-5 surge testing?

Yes, the BZW06-273H is rated for 600W peak pulse power at the 10/1000 µs waveform defined in IEC 61000-4-5, with a clamping voltage of 438 V at 1.6 A. This performance allows it to protect downstream circuitry during Level 3 (2 kV line-earth) and Level 4 (4 kV line-earth) tests when properly mounted with low-inductance layout. The BZW06-273H's low dynamic impedance and fast response (<1.0 ps) further ensure effective clamping of fast-rising surges encountered in real-world installations.

Does the BZW06-273H meet automotive qualification standards?

Yes, the "H" suffix in BZW06-273H explicitly denotes AEC-Q101 qualification, covering stress tests including high-temperature operating life (HTOL), temperature cycling, mechanical shock, and ESD (HBM ≥2 kV). This certification validates its suitability for automotive powertrain, chassis, and body electronics where reliability under thermal, vibration, and electrical stress is mandatory. The BZW06-273H's 175°C maximum junction temperature and halogen-free construction align with automotive OEM requirements.

What is the thermal performance of the BZW06-273H in PCB-mounted applications?

The BZW06-273H has a junction-to-lead thermal resistance (R_θJL) of 60 °C/W and junction-to-ambient (R_θJA) of 100 °C/W with 10 mm lead length. In typical PCB mounting with copper pour under leads, it can dissipate up to 1.7 W continuously at T_L = 75°C. For surge events, its transient thermal impedance allows safe absorption of 600W pulses without exceeding 175°C junction temperature-provided layout minimizes trace inductance and maximizes copper area for heat spreading. This makes the BZW06-273H viable in compact, thermally dense automotive modules.

How does the BZW06-273H compare to bidirectional variants like BZW06-273BH?

The BZW06-273H is unidirectional, while BZW06-273BH is bidirectional-meaning the latter clamps both positive and negative transients symmetrically around 0 V. The BZW06-273H offers lower capacitance and tighter V_BR tolerance for single-polarity protection (e.g., 24V rail to ground), whereas the BH variant suits AC-coupled or floating signal lines. Both share identical V_WM, V_BR, and P_PK, but the BZW06-273H's unidirectional design yields better leakage performance (<1 µA) and faster response in its intended polarity. Select BZW06-273H when protecting DC rails with known polarity.