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STMicroelectronics BZW06-28
- Part No.:
- BZW06-28
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW06-28.pdf
- Description:
- TVS DO15 28.2V 600W UNIDIR
- Quantity:
- Payment:
- Shipping:
Inventory:3,045
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Product details
Overview
BZW06-28 from STMicroelectronics is a unidirectional 600 W transient voltage suppression diode in DO-15 package, designed for IEC 61000-4-2 ESD (30 kV air/contact) and IEC 61000-4-4 surge (4 kV level 4) protection. It features a 28 V stand-off voltage (VRM), 45.7 V clamping voltage (VCL) at 13.1 A peak pulse current (IPP), and operates up to 175 °C junction temperature. Used in AC/DC power supplies and industrial control inputs where low leakage (<0.2 µA) and high thermal stability are required.
For engineers reviewing the BZW06-28 datasheet, BZW06-28 pinout, BZW06-28 application, or BZW06-28 equivalent, key selection criteria include clamping voltage margin versus protected IC VDD, 10/1000 µs power derating above 25 °C, bidirectional vs. unidirectional polarity requirements, and DO-15 PCB layout thermal pad area impact on Rth(j-a).
Technical Context
The BZW06-28 employs planar junction technology enabling low leakage current (<0.2 µA at VRM) and stable VBR over temperature (αT = 9.8 × 10⁻⁴/°C). Its dynamic resistance (RD = 0.835 Ω) defines clamping behavior under 10/1000 µs surges, while junction capacitance remains below 100 pF at 1 V reverse bias-critical for signal-line ESD protection without bandwidth degradation.
Thermal performance is defined by junction-to-ambient thermal resistance (Rth(j-a) ≈ 4.5 °C/W with 3 cm² copper per lead) and peak power derating: 600 W at 25 °C ambient drops to ~300 W at 175 °C Tj. The device meets MIL-STD-883 Method 3015 and UL 497B for telecom surge immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 28 V - Maximum continuous reverse operating voltage before breakdown; sets minimum system working voltage margin. |
| Breakdown Voltage (VBR) | 31.4–34.8 V at 1 mA - Confirmed avalanche onset range; used to calculate temperature-corrected clamping. |
| Clamping Voltage (VCL) | 45.7 V at 13.1 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines IC survivability. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs), 4 kW (8/20 µs) - Defines surge energy handling capability; higher 8/20 µs rating suits lightning-induced transients. |
| Leakage Current (IRM) | ≤0.2 µA at 28 V - Ensures minimal standby power loss and signal integrity in high-impedance sensing paths. |
| Junction Temperature Range | −55 to +175 °C - Enables deployment in automotive engine bays, industrial motor drives, and outdoor power converters. |
| Dynamic Resistance (RD) | 0.835 Ω - Quantifies voltage rise per ampere of surge current; lower RD improves clamping linearity. |
Pinout & Package
DO-15 (JEDEC DO-204AC) axial-leaded package with matte tin-plated leads. Body length 6.05–6.75 mm, lead diameter 0.71–0.88 mm, overall length 26–31 mm. Designed for through-hole mounting with 260 °C max soldering temperature (10 s at 5 mm from case).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (cathode-banded end) | Surge current return path | Connected to ground or low-impedance reference; must handle ≥100 A non-repetitive forward surge (IFSM). |
| Cathode (banded end) | Protected line connection | Connected to input line (e.g., AC mains, DC bus); clamps to anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD robustness | 30 kV contact/air discharge - Eliminates need for external ESD diodes in front-end protection stages. |
| High-temperature operation | 175 °C max junction temperature - Supports placement near heat-generating components without derating penalties. |
| Low dynamic resistance | 0.835 Ω - Reduces clamping voltage overshoot during fast-rising transients (e.g., relay bounce, inductive kickback). |
| UL 497B certification | File QVGQ2.E136224 - Validates suitability for secondary-circuit telecom and data line surge protection per UL standards. |
| Planar junction construction | ≤0.2 µA IR at VRM - Minimizes standby current in battery-powered or energy-harvesting systems. |
Applications
| Industrial AC/DC Power Supply Input | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protects rectifier bridge and PFC controller inputs against lightning-induced surges on 230 VAC mains lines. IC Role / Device Role: Primary-level TVS clamp placed before bridge rectifier to limit transient voltage to <50 V. Use Value: Withstands 4 kV IEC 61000-4-4 level 4 surges while maintaining 45.7 V clamping-below typical 60 V MOSFET drain ratings. |
Use Scenario: Shields RS-485 transceivers and isolation amplifiers on fieldbus lines exposed to induced surges. IC Role / Device Role: Unidirectional clamp on VCC rail and signal lines referenced to local ground plane. Use Value: 30 kV ESD immunity ensures compliance with EN 61000-6-2 without additional board space for multi-stage protection. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Surge Protection |
Use Scenario: Guards LIN bus transceivers and microcontroller I/O pins against load dump and ISO 7637-2 pulses. IC Role / Device Role: Secondary protection after LC filter; absorbs residual energy not filtered by upstream components. Use Value: 175 °C operation allows direct placement near BCM power regulators without thermal derating. |
Use Scenario: Protects metering IC analog inputs and MCU supply rails from neutral-ground surges in utility substations. IC Role / Device Role: Standoff-rated clamp on 3.3 V or 5 V internal rails with tight VBR tolerance (±3.1 V). Use Value: 0.2 µA leakage prevents measurement drift in 24-bit delta-sigma ADC reference paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A | Same 28 V VRM, but SMB package (surface-mount); 600 W rating at 25 °C only; derates faster above 75 °C. | Requires reflow-compatible PCB layout; unsuitable for through-hole legacy designs or high-vibration environments. | Select when board space is constrained and thermal management uses copper pour rather than lead conduction. |
| P6KE27A | 27 V VRM, 400 W rating (10/1000 µs), DO-15 package; higher leakage (5 µA) and lower surge capability (100 A IFSM vs. 100 A). | Limited to lower-energy transients; insufficient for IEC 61000-4-4 level 4 in unprotected locations. | Acceptable only in cost-sensitive consumer applications with controlled surge environments. |
Compared with SMBJ28A and P6KE27A, BZW06-28 delivers superior thermal stability at elevated temperatures, lower leakage for precision analog circuits, and verified 4 kV IEC 61000-4-4 compliance-making it optimal for industrial and automotive front-end protection where reliability trumps footprint savings.
Availability
BZW06-28 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, telecom line interfaces, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZW06-28 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, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer markets.
BZW06-28 belongs to ST's high-power TVS diode family engineered specifically for robust front-end surge protection in harsh environments-emphasizing thermal resilience, low leakage, and certified immunity to IEC and UL transient standards.
FAQ
What is the maximum clamping voltage of BZW06-28 under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 45.7 V at 13.1 A peak pulse current for a 10/1000 µs waveform, measured at 25 °C. This value increases with junction temperature at a rate defined by αT = 9.8 × 10⁻⁴/°C, reaching approximately 51.2 V at 125 °C junction temperature.
Can BZW06-28 be used in bidirectional configurations?
No-BZW06-28 is unidirectional. For bidirectional protection at the same 28 V standoff, use BZW06-28B. The 'B' suffix denotes symmetrical breakdown in both polarities, essential for AC line or differential signal protection where voltage reversals occur.
How does the DO-15 package affect thermal performance compared to SMD alternatives?
DO-15 leads conduct heat directly into PCB copper, achieving Rth(j-a) ≈ 4.5 °C/W with 3 cm² copper per lead-superior to most SMD packages at high ambient temperatures. This enables full 600 W surge rating up to 100 °C ambient, whereas SMBJ28A derates to ~350 W at the same temperature.
Is BZW06-28 compliant with RoHS and REACH regulations?
Yes-BZW06-28 is manufactured in ST's ECOPACK2-compliant process, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Lead finish is matte tin, and halogen-free epoxy molding compound is used per ST's environmental specifications.
BZW06-28 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- BZW06, TRANSIL™
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 68A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1000pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
BZW06-28 FAQ
1.How can I place an order for BZW06-28 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW06-28 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 BZW06-28 reliable?
The price and inventory of BZW06-28 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW06-28 is usually 5 days.
3.What payment methods are accepted for BZW06-28?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW06-28 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW06-28?
BZW06-28 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW06-28 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 BZW06-28?
For technical support, including BZW06-28 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW06-28 requirements.
6.How does Aetrix verify that BZW06-28 is sourced from the original manufacturer or authorized distributors?
All BZW06-28 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 BZW06-28 meets industry standards.
7.What is the process for return or replacement of BZW06-28?
All BZW06-28 units undergo pre-shipment inspection (PSI). If there is an issue with BZW06-28, 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 BZW06-28 part is unused and in its original packaging.
Return procedure for BZW06-28:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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