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STMicroelectronics BZW06-31RL
- Part No.:
- BZW06-31RL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW06-31RL.pdf
- Description:
- TVS DIODE 30.8VWM 64.3VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:5,980
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Product details
Overview
BZW06-31RL 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 31 V stand-off voltage (VRM), 49.9 V clamping voltage at 12 A (10/1000 µs), and 600 W peak pulse power rating. Used in AC/DC power supplies and industrial control inputs to protect downstream rectifiers and controllers.
For engineers reviewing the BZW06-31RL datasheet, BZW06-31RL pinout, BZW06-31RL application, or BZW06-31RL equivalent, key selection criteria include clamping voltage vs. protected IC VBR, leakage current at operating temperature, junction temperature derating above 25 °C, and DO-15 thermal pad layout compatibility with FR4 PCB copper area.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <0.2 µA reverse leakage at 31 V and 25 °C; during transients, it avalanches at 34.2–37.8 V (VBR) and clamps to ≤49.9 V at 12 A (10/1000 µs), limiting energy delivered to downstream circuitry. Its planar junction enables stable performance up to 175 °C junction temperature.
The device's dynamic resistance (RD = 1.01 Ω) and low capacitance (<100 pF at 1 MHz, VR = 1 V) support fast transient response without signal integrity degradation in DC power rails and low-speed analog interfaces. Thermal impedance is optimized for standard DO-15 mounting on 1 cm² copper per lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 31 V - Maximum continuous reverse working voltage before avalanche conduction begins. |
| Breakdown Voltage (VBR) | 34.2–37.8 V at 1 mA - Ensures reliable triggering margin above system nominal voltage. |
| Clamping Voltage (VCL) | 49.9 V at 12 A, 10/1000 µs - Limits peak stress on protected ICs during surge events. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustains 600 W transient energy without failure at Tj = 25 °C. |
| Leakage Current (IRM) | ≤0.2 µA at VRM = 31 V, 25 °C - Minimizes standby power loss in always-on circuits. |
| Junction Temperature Range | −55 to +175 °C - Supports operation in high-ambient environments like industrial motor drives. |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2) - Meets highest-level system-level ESD immunity requirements. |
Pinout & Package
DO-15 (JEDEC DO-204AC) axial-leaded package with cathode band marking. Leads are matte tin-plated for solderability and RoHS compliance. Package dimensions: A = 6.05–6.75 mm length, B = 26–31 mm body length, D = 0.71–0.88 mm lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; defines polarity for unidirectional clamping. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., AC input, sensor line); carries full surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature reliability | Rated for continuous operation up to 175 °C junction temperature with no parameter drift. |
| Low dynamic resistance | RD = 1.01 Ω ensures minimal voltage overshoot during fast 8/20 µs surges. |
| ESD robustness | Exceeds IEC 61000-4-2 level 4 by 2× (30 kV vs. required 8 kV). |
| Thermal stability | Clamping voltage shift coefficient αT = 9.9 × 10−4/°C enables accurate VCL prediction across temperature. |
| Low leakage | ≤0.2 µA at 31 V supports battery-powered and ultra-low-power systems. |
Applications
| Industrial AC/DC Power Input | Automotive Body Control Module (BCM) Inputs |
|---|---|
Use Scenario: Protection of bridge rectifier inputs against lightning-induced surges and load dump transients in 24 V industrial SMPS. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between L/N lines and chassis ground, triggered within nanoseconds of overvoltage onset. Use Value: Limits peak voltage to ≤49.9 V, preventing damage to 600 V rectifiers and reducing need for oversized input capacitors. | Use Scenario: Guarding LIN bus and sensor inputs (e.g., door latch, ambient light) against ESD and battery disconnect spikes. IC Role / Device Role / Timing Role: Standby-mode protector with sub-microamp leakage, activated only during >30 kV ESD events per IEC 61000-4-2. Use Value: Maintains system sleep current below 1 µA while surviving repeated 30 kV contact discharges without parameter shift. |
| Programmable Logic Controller (PLC) Digital I/O | Medical Equipment Patient Interface Ports |
Use Scenario: Safeguarding 24 V digital input channels against field-wiring induced surges and ground loop transients. IC Role / Device Role / Timing Role: Primary front-end clamp on each channel, coordinated with series current-limiting resistor and optocoupler isolation. Use Value: Enables 600 W surge handling per channel without thermal runaway, supporting Class I installation environments. | Use Scenario: Protecting isolated USB and analog sensor ports on patient monitors from operator ESD and defibrillator-induced transients. IC Role / Device Role / Timing Role: Secondary-level protector after isolation barrier, providing final-stage clamping with <100 pF capacitance. Use Value: Prevents signal distortion on 1 Mbps USB lines and preserves accuracy of µV-level biopotential measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Higher VRWM = 33 V; lower VCL = 53.3 V at 11.3 A; SMB package (surface-mount) | Requires PCB rework for SMT layout; better suited for space-constrained designs with automated assembly. | Select when board real estate is limited and wave/reflow compatibility is required. |
| P6KE33A | Same DO-15 package; higher VRWM = 33 V; lower PPP = 600 W but higher VCL = 53.3 V at 11.3 A; older process with wider VBR tolerance. | Compatible drop-in replacement for legacy designs; lacks ST's 175 °C Tj rating and low RD. | Select for cost-sensitive retrofits where thermal margin is not critical. |
Compared with SMBJ33A and P6KE33A, BZW06-31RL delivers tighter VBR tolerance (±5% vs. ±10%), lower dynamic resistance (1.01 Ω vs. ≥1.2 Ω), and guaranteed 175 °C operation-critical for high-reliability industrial power supplies where thermal cycling dominates lifetime failure modes.
Availability
BZW06-31RL is available at Aetrix Electronics and suitable for industrial AC/DC power inputs, automotive BCM interfaces, and PLC digital I/O requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZW06-31RL 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The BZW06 series belongs to ST's high-reliability TVS portfolio, engineered specifically for harsh-environment surge protection where extended temperature range, low leakage, and repeatable clamping performance are mandatory.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The BZW06-31RL is rated for continuous operation up to +175 °C junction temperature, verified per JESD22-A103 and supported by thermal impedance data in Figure 11 of DS0661. Derating begins at 25 °C ambient, with peak pulse power dropping to 300 W at Tj = 175 °C (10/1000 µs).
How does clamping voltage change with temperature?
VCL increases linearly with junction temperature at a coefficient of 9.9 × 10−4/°C. At 125 °C, VCL rises by ~10% versus 25 °C (e.g., 49.9 V → ~54.9 V), calculated using VCL(Tj) = VCL(25 °C) × [1 + αT × (Tj − 25)].
Is BZW06-31RL suitable for bidirectional signal lines?
No - BZW06-31RL is unidirectional and must be installed with cathode toward the protected line. For bidirectional protection (e.g., RS-485, USB), use BZW06-31B, which has symmetrical breakdown in both polarities and identical packaging except for dual-band marking.
What is the recommended PCB copper area for thermal management?
Per Figure 12 in DS0661, a minimum of 1 cm² copper area per lead reduces thermal resistance from junction to ambient to ≤4.5 °C/W. Doubling copper area to 2 cm² further lowers Rth(j-a) to ~3.2 °C/W, enabling sustained 600 W pulse handling at elevated ambient temperatures.
BZW06-31RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- BZW06, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 62A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 950pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
BZW06-31RL FAQ
1.How can I place an order for BZW06-31RL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW06-31RL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZW06-31RL reliable?
The price and inventory of BZW06-31RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW06-31RL is usually 5 days.
3.What payment methods are accepted for BZW06-31RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW06-31RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW06-31RL?
BZW06-31RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW06-31RL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZW06-31RL?
For technical support, including BZW06-31RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW06-31RL requirements.
6.How does Aetrix verify that BZW06-31RL is sourced from the original manufacturer or authorized distributors?
All BZW06-31RL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZW06-31RL meets industry standards.
7.What is the process for return or replacement of BZW06-31RL?
All BZW06-31RL units undergo pre-shipment inspection (PSI). If there is an issue with BZW06-31RL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZW06-31RL part is unused and in its original packaging.
Return procedure for BZW06-31RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW06-31RL Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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