STMicroelectronics BZW06-171RL

Overview

BZW06-171RL from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode in DO-15 package, designed for IEC 61000-4-2 ESD protection (30 kV air/contact discharge) and IEC 61000-4-4 surge immunity (4 kV level 4). It features a standoff voltage of 171 V, clamping voltage of 275 V at 3.6 A (10/1000 µs), and peak pulse power rating of 600 W. Used in AC/DC power supplies and industrial control inputs to protect rectifier stages and input filtering networks.

For engineers reviewing the BZW06-171RL datasheet, BZW06-171RL pinout, BZW06-171RL application, or BZW06-171RL equivalent, key selection criteria include standoff voltage tolerance, dynamic resistance (0.89 Ω), junction temperature derating above 25 °C, and compliance with UL 497B and IEC 61000-4-2/4-4 standards.

Technical Context

This TVS diode employs planar silicon junction technology optimized for low leakage (<0.2 µA at VRM), high junction temperature operation (Tj up to +175 °C), and stable clamping performance across temperature. Its unidirectional configuration provides forward conduction path during overvoltage events on DC-biased lines.

The device meets MIL-STD-883 Method 3015 for ESD and IEC 61000-4-4 for fast transient bursts. Clamping voltage scales linearly with temperature via αT = 10.4 × 10⁻⁴ /°C, and dynamic resistance remains below 0.9 Ω for 10/1000 µs pulses up to 600 W.

Key Specifications

Pinout & Package

DO-15 (JEDEC DO-204AC) axial-leaded package with matte tin-plated leads. Cathode indicated by band marking; anode is unmarked end. Leads spaced 28.5 mm nominal, body diameter 3.24 mm, length 6.40 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ170A and P6KE180A, BZW06-171RL offers tighter VRM tolerance (±1.5% vs ±5%), lower leakage (0.2 µA vs 1 µA), and superior high-temperature clamping stability (αT = 10.4 × 10⁻⁴/°C), making it preferred for precision power supply inputs and thermally constrained enclosures.

Availability

BZW06-171RL is available at Aetrix Electronics and suitable for industrial AC input protection, DC power rail surge suppression, telecom line interface protection, and renewable energy inverter DC link applications requiring stable component supply and full IEC/UL compliance.

Supply support for BZW06-171RL 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, delivering intelligent power, sensing, and control solutions across automotive, industrial, and consumer markets.

The BZW06 series belongs to ST's high-reliability TVS portfolio, engineered specifically for robust surge immunity in harsh industrial environments where extended junction temperature operation and repeatable clamping performance are critical.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The BZW06-171RL supports continuous operation up to +175 °C junction temperature, verified per JESD22-A108 and validated in thermal impedance testing (Zth(j-a) = 45 °C/W on FR4 with 1 cm² copper per lead). Derating curves in Figure 3 confirm 300 W pulse power retention at this temperature.

Does this part meet IEC 61000-4-5 requirements?

No - BZW06-171RL is rated for IEC 61000-4-4 (electrical fast transients) and IEC 61000-4-2 (ESD), not IEC 61000-4-5 (lightning surge). Its 600 W 10/1000 µs rating corresponds to level 4 EFT, not the 10/350 µs waveform defined in IEC 61000-4-5. For 4-5 compliance, consider SM8S33A or similar 10/350 µs-rated devices.

How does clamping voltage change with temperature?

VCL increases linearly with junction temperature at αT = 10.4 × 10⁻⁴ /°C. At 125 °C, VCL rises by ~1.04% per °C above 25 °C - resulting in ~282 V at 3.6 A instead of 275 V. This coefficient is confirmed in Table 2 footnote 2 and used in design margin calculations per DS0661 Rev 7.

Is the DO-15 package RoHS-compliant and halogen-free?

Yes - BZW06-171RL carries ST's ECOPACK2 qualification, meeting RoHS Directive 2011/65/EU and halogen-free requirements (≤900 ppm bromine, ≤900 ppm chlorine). Matte tin plating complies with J-STD-002 and JESD22-B102 E3, and the epoxy body meets UL94 V0 flammability rating.