Taiwan Semiconductor Corporation BZW06-23

Overview

BZW06-23 from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It features a 25.7–28.4 V breakdown voltage (V_BR), 23.1 V working stand-off voltage (V_WM), 37.5 V clamping voltage at 16.0 A (10/1000 µs), 600 W peak pulse power, and DO-204AC (DO-15) package - deployed to safeguard microcontrollers and CAN transceivers against EFT and load-dump transients.

For engineers reviewing the BZW06-23 datasheet, BZW06-23 pinout, BZW06-23 application, or BZW06-23 equivalent, key selection criteria include verified clamping performance at 16.0 A, unidirectional polarity marking, thermal resistance (R_θJL = 60 °C/W), AEC-Q101 qualification eligibility, and compatibility with lead-free reflow per J-STD-002.

Technical Context

The BZW06-23 operates as a silicon avalanche diode with fast response (<1.0 ps from 0 V to V_BR) and low dynamic impedance, enabling precise voltage clamping during sub-microsecond transients. Its junction-to-lead thermal resistance of 60 °C/W supports reliable power dissipation under repetitive surge conditions up to T_J = 175 °C.

Designed for unidirectional operation, it exhibits <1 µA reverse leakage at 23.1 V and a temperature coefficient of 0.096 %/°C for V_BR, ensuring stable clamping across automotive ambient ranges (−55 to +175 °C). The device meets RoHS and halogen-free requirements per IEC 61249-2-21.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Leads are pure tin-plated and solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ24A and P6KE27A, the BZW06-23 offers identical clamping performance and DO-15 through-hole compatibility, while providing optional AEC-Q101 qualification and tighter V_BR tolerance (±5% vs ±10%), making it preferred for automotive ECU front-end protection where reliability and consistency are critical.

Availability

BZW06-23 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, LED driver power stages, and DC-DC converter input protection requiring stable component supply and long-term lifecycle support.

Supply support for BZW06-23 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 semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power management, protection, and signal conditioning devices.

The BZW06 series belongs to TSC's high-power TVS portfolio, engineered specifically for automotive-grade transient immunity and industrial equipment robustness - emphasizing low clamping ratio, repeatable surge endurance, and extended temperature operation.

FAQ

What is the maximum clamping voltage of the BZW06-23 under standard 10/1000 µs surge conditions?

The BZW06-23 has a maximum clamping voltage (V_C) of 37.5 V at 16.0 A peak pulse current under the 10/1000 µs waveform. This value is measured per JEDEC standards and reflects the actual voltage imposed on the protected circuit during worst-case transient events - critical for verifying margin against downstream IC absolute maximum ratings. The BZW06-23 maintains this clamping performance across its full operating temperature range.

Is the BZW06-23 suitable for automotive applications requiring AEC-Q101 qualification?

Yes - the BZW06-23H variant is AEC-Q101 qualified, meeting stress tests for temperature cycling, high-temperature reverse bias, and accelerated life testing required for automotive under-hood use. The base BZW06-23 is not qualified, but shares identical electrical and thermal characteristics; qualification status is determined solely by the "H" suffix in the ordering code per TSC's documentation.

How does the BZW06-23 compare to bidirectional TVS diodes like BZW06-23B in terms of circuit implementation?

The BZW06-23 is unidirectional and requires correct polarity placement (cathode to protected line), whereas BZW06-23B is bidirectional and symmetrical. Using BZW06-23 in place of BZW06-23B without adjusting schematic polarity risks open-circuit behavior during negative transients. The BZW06-23 offers lower capacitance and faster response than its bidirectional counterpart, making it preferable for DC power rail protection where polarity is fixed.

What is the thermal resistance from junction to lead (R_θJL) for the BZW06-23, and why does it matter in PCB layout?

The BZW06-23 has a junction-to-lead thermal resistance (R_θJL) of 60 °C/W. This parameter directly governs how effectively heat generated during surge events transfers from the silicon die to the PCB copper traces via the leads. Designers must allocate adequate copper area (e.g., ≥25 mm² per lead) and minimize trace length to maintain safe junction temperatures below 175 °C during repetitive surges - especially in enclosed automotive enclosures.

Can the BZW06-23 be used in parallel to increase surge current handling capacity?

No - the BZW06-23 should not be paralleled without external balancing components. Due to manufacturing tolerances in V_BR (±5%), mismatched avalanche turn-on can cause one device to absorb >90% of the surge current, leading to premature failure. For higher current handling, select a single higher-rated part (e.g., BZW06-26) or implement active current-sharing circuits - the BZW06-23 datasheet explicitly warns against direct parallel connection.