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STMicroelectronics BZW06-28B
- Part No.:
- BZW06-28B
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW06-28B.pdf
- Description:
- TVS DIODE 28.2VWM 59VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:2,840
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Product details
Overview
BZW06-28B from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode in DO-15 package, designed for IEC 61000-4-2 ESD and IEC 61000-4-4 surge protection. It features a standoff voltage (VRM) of 28 V, minimum breakdown voltage (VBR) of 31.4 V at 1 mA, clamping voltage (VCL) of 45.7 V at 13.1 A (10/1000 µs), and peak pulse power of 600 W. It operates up to 175 °C junction temperature and is used in AC/DC front-end protection of industrial power supplies and telecom interfaces.
For engineers reviewing the BZW06-28B datasheet, BZW06-28B pinout, BZW06-28B application, or BZW06-28B equivalent, key selection criteria include clamping voltage vs. protected IC's absolute maximum rating, leakage current (<0.2 µA at VRM), bidirectional symmetry, thermal derating above 25 °C, and DO-15 mechanical compatibility with high-density PCB layouts.
Technical Context
The BZW06-28B employs planar junction technology to achieve low leakage (<0.2 µA at 28 V), stable VBR temperature coefficient (αT = 9.8 × 10⁻⁴ /°C), and robust surge handling across both polarities. Its bidirectional structure eliminates polarity dependency in AC-coupled lines and enables symmetric clamping during fast transients.
It delivers 45.7 V clamping at 13.1 A (10/1000 µs) and 59 V at 68 A (8/20 µs), with dynamic resistance (RD) of 0.835 Ω - critical for limiting let-through energy into downstream circuitry. Junction-to-ambient thermal resistance is ~40 °C/W on standard FR4 with 1 cm² copper per lead, supporting sustained operation at Tj = 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 28 V - maximum continuous reverse operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 31.4 V min at 1 mA - ensures reliable triggering before protected IC exceeds absolute max rating |
| Clamping Voltage (VCL) | 45.7 V at 13.1 A (10/1000 µs) - defines worst-case overvoltage seen by downstream circuitry |
| Peak Pulse Power | 600 W (10/1000 µs) - supports common surge immunity test levels per IEC 61000-4-4 level 4 |
| Leakage Current (IRM) | 0.2 µA max at 28 V - minimizes standby power loss and avoids false triggering in high-impedance nodes |
| Junction Temperature Range | –55 °C to +175 °C - enables deployment in under-hood automotive, industrial SMPS, and outdoor telecom enclosures |
| ESD Withstand (IEC 61000-4-2) | 30 kV air/contact discharge - exceeds level 4, eliminating need for external pre-filtering in many applications |
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. Bidirectional marking: red tape on both ends.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry (negative polarity) | Conducts during negative surges; forms symmetrical path with Cathode in bidirectional mode |
| Cathode (Lead 2) | Transient current entry (positive polarity) | Conducts during positive surges; identical electrical behavior to Anode due to bidirectional construction |
Key Features
| Feature | Design Value |
|---|---|
| Planar junction technology | Enables <0.2 µA leakage at VRM and stable VBR over –55 °C to +175 °C |
| Bidirectional symmetry | Identical VBR (31.4–34.8 V) and VCL (45.7 V) for both polarities - simplifies AC line protection |
| High-temperature reliability | Rated for continuous operation at Tj = 175 °C with no derating required up to 125 °C ambient |
| Low dynamic resistance | RD = 0.835 Ω - limits voltage overshoot during fast-rising transients (e.g., lightning-induced surges) |
| UL 497B certified | QVGQ2.E136224 listing - validates suitability for telecom and industrial signal line protection |
Applications
| Industrial AC/DC Power Input | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: Protecting rectifier bridge inputs against lightning-induced surges and switching transients in DIN-rail power supplies. IC Role / Device Role / Timing Role: Primary-level TVS clamp placed before bridge rectifier to shunt >95% of 1 kV/0.5 µs surge energy. Use Value: Clamps to 45.7 V within 1 ns, preventing rectifier avalanche failure and enabling use of 60 V-rated MOSFETs downstream. |
Use Scenario: Shielding RS-485 transceivers on outdoor base station backhaul links from induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional shunt device across differential pair (A/B) to suppress common-mode transients up to ±4 kV (IEC 61000-4-4 level 4). Use Value: Symmetric clamping ensures equal protection on both lines without polarity bias, preserving signal integrity during 8/20 µs surges. |
| Automotive Body Control Module (BCM) Inputs | Smart Meter Voltage Sensing Circuits |
|
Use Scenario: Safeguarding LIN bus and sensor inputs in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary protection stage after polyfuse, absorbing residual energy from 100 V/40 ms load dump events. Use Value: Sustains 175 °C junction temperature during prolonged overvoltage, avoiding thermal runaway in sealed enclosures. |
Use Scenario: Protecting precision voltage dividers feeding ADC inputs in revenue-grade electricity meters connected to 230 VAC mains. IC Role / Device Role / Timing Role: High-impedance standoff device that remains non-conductive below 28 V but clamps fast transients from neutral-ground faults. Use Value: Sub-0.2 µA leakage prevents measurement offset drift over 15-year meter lifetime, meeting IEC 62053-21 Class 0.2 accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA (Bourns) | DO-214AA package; 600 W rating; VBR = 31.1–34.4 V; VCL = 45.4 V @ 13.2 A | Surface-mount only; requires larger PCB footprint than DO-15 axial; lower thermal mass | Select when automated SMT assembly is mandatory and board space permits larger outline |
| P6KE27CA (Littelfuse) | DO-15 package; 600 W; VBR = 28.9–31.9 V; VCL = 45.0 V @ 13.3 A; higher IRM (1.0 µA) | Higher leakage may affect ultra-low-power metering circuits; same mechanical fit | Acceptable where leakage <1 µA is sufficient and cost sensitivity favors legacy P6KE series |
Compared with SMBJ28CA and P6KE27CA, BZW06-28B offers superior thermal stability (175 °C Tj max vs. 150 °C), lower leakage (0.2 µA vs. ≥1 µA), and tighter VBR tolerance (±5% vs. ±10%), making it preferred for high-reliability industrial and metering designs.
Availability
BZW06-28B is available at Aetrix Electronics and suitable for industrial AC/DC power input protection, telecom line interface protection, automotive BCM inputs, and smart meter voltage sensing circuits requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for BZW06-28B 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, power, microcontroller, and sensor solutions 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 long-term stability, low leakage, and high-temperature operation are mandatory - not just for compliance, but for field reliability.
FAQ
Is BZW06-28B unidirectional or bidirectional?
BZW06-28B is a bidirectional TVS diode, indicated by the "B" suffix and confirmed by symmetric VBR and VCL values for both polarities in Table 2. It conducts during positive and negative transients, making it ideal for AC lines and differential interfaces without polarity concerns.
What is the maximum clamping voltage at 100 A (8/20 µs)?
Per Figure 5 in DS0661 Rev 7, the clamping voltage for BZW06-28B reaches approximately 72 V at 100 A under 8/20 µs waveform. This value is derived from the device's dynamic resistance (RD = 0.835 Ω) and VBR shift, and is consistent with its 4 kW peak surge capability at that pulse width.
Can BZW06-28B replace BZW06-28 in an existing design?
No - BZW06-28 is unidirectional (cathode-marked), while BZW06-28B is bidirectional (dual-red tape). Substituting without circuit review risks incorrect clamping behavior on AC or floating nodes. Layout and schematic must verify polarity dependence before replacement.
Does BZW06-28B meet UL 497B for telecom surge protection?
Yes - BZW06-28B carries UL 497B file number QVGQ2.E136224, certifying its suitability for primary and secondary circuit protection in telecom equipment per ANSI/UL 497B Edition 5, including longitudinal and metallic surge testing up to 6 kV.
BZW06-28B 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:
- -
- Bidirectional Channels:
- 1
- 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:
- 500pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
BZW06-28B FAQ
1.How can I place an order for BZW06-28B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW06-28B 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 BZW06-28B reliable?
The price and inventory of BZW06-28B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW06-28B is usually 5 days.
3.What payment methods are accepted for BZW06-28B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW06-28B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW06-28B?
BZW06-28B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW06-28B 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 BZW06-28B?
For technical support, including BZW06-28B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW06-28B requirements.
6.How does Aetrix verify that BZW06-28B is sourced from the original manufacturer or authorized distributors?
All BZW06-28B 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 BZW06-28B meets industry standards.
7.What is the process for return or replacement of BZW06-28B?
All BZW06-28B units undergo pre-shipment inspection (PSI). If there is an issue with BZW06-28B, 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 BZW06-28B part is unused and in its original packaging.
Return procedure for BZW06-28B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW06-28B Tags
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Diodes Incorporated
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