STMicroelectronics BZW06-342BRL

Overview

BZW06-342BRL from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a standoff voltage (VRM) of 342 V, clamping voltage (VCL) of 548 V at 1.1 A (10/1000 µs), peak pulse power of 600 W, and operates up to 175 °C junction temperature - deployed in industrial power supplies and telecom infrastructure where IEC 61000-4-4 level 4 (4 kV) and IEC 61000-4-2 (30 kV contact/air) compliance is required.

For engineers reviewing the BZW06-342BRL datasheet, BZW06-342BRL pinout, BZW06-342BRL application, or BZW06-342BRL equivalent, key selection criteria include verified clamping performance at elevated temperature, low dynamic resistance (50.2 Ω), bidirectional ESD robustness, and DO-15 package thermal reliability under repeated surge stress.

Technical Context

This device uses planar silicon junction technology to achieve stable reverse leakage (<0.2 µA at VRM), low capacitance (<10 pF at 1 V), and predictable voltage-temperature coefficient (αT = 11 × 10⁻⁴ /°C). Its bidirectional architecture enables symmetrical clamping on both polarities without external polarity management.

The DO-15 package supports high thermal impedance handling (Zth(j-a) ≈ 100 °C/W for short pulses) and meets J-STD-020 MSL Level 1, enabling direct reflow soldering without moisture sensitivity concerns. Surge capability is validated per IEC 61000-4-2 (30 kV) and IEC 61000-4-4 (4 kV), with VCL scaling linearly with junction temperature via αT.

Key Specifications

Pinout & Package

DO-15 (JEDEC DO-204AC) package: axial leaded, epoxy-molded, matte tin-plated leads. Dimensions: A = 6.05–6.75 mm (body length), B = 26–31 mm (lead length), C = 2.95–3.53 mm (body diameter), D = 0.71–0.88 mm (lead diameter).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ350CA and P6SMB350CA, BZW06-342BRL offers tighter VCL (548 V vs. ≥574 V), lower dynamic resistance (50.2 Ω vs. ≥65 Ω), and guaranteed 175 °C operation - making it optimal for space-constrained, high-reliability industrial power applications demanding minimal clamping overshoot.

Availability

BZW06-342BRL is available at Aetrix Electronics and suitable for industrial power supply protection, telecom line interface, renewable energy inverter DC link, and railway signaling interface requiring stable component supply and long-term lifecycle assurance.

Supply support for BZW06-342BRL 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The BZW06 series belongs to ST's high-voltage TVS portfolio, engineered specifically for robust, high-temperature surge suppression in mission-critical power and communication infrastructure.

FAQ

What is the maximum clamping voltage for BZW06-342BRL under a 10/1000 µs surge?

The maximum clamping voltage (VCL) is 548 V at 1.1 A for a 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases linearly with junction temperature using αT = 11 × 10⁻⁴ /°C, reaching ~600 V at Tj = 175 °C - confirmed in DS0661 Rev 7 Table 2 and Figure 5.

Is BZW06-342BRL unidirectional or bidirectional, and how is polarity identified?

BZW06-342BRL is a bidirectional TVS diode, meaning it provides symmetrical clamping on both polarities. Polarity is not applicable; the device has no anode/cathode distinction in circuit function. Marking is "342B" on the body, and tape orientation uses red on both sides per Figure 19 in DS0661.

Can BZW06-342BRL be used in reflow soldering processes?

Yes - it is qualified for lead-free reflow per J-STD-020 MSL Level 1, with a peak profile of 240–245 °C for ≤60 seconds. The recommended ramp rate is ≤3 °C/s, and the package withstands 260 °C for 10 s at 5 mm from case, as specified in DS0661 Section 2.2 and Table 1.

How does its dynamic resistance affect system-level surge protection design?

With RD = 50.2 Ω, the clamping voltage rises by ~50 V per additional 1 A of surge current beyond the rated IPP. This allows precise prediction of worst-case VCL under real-world surge currents (e.g., 2 A → VCL ≈ 648 V), enabling accurate margining of downstream component voltage ratings without overdesign.