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STMicroelectronics BZW04-5V8B
- Part No.:
- BZW04-5V8B
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW04-5V8B.pdf
- Description:
- TVS DO15 5.8V 400W UNIDIR
- Quantity:
- Payment:
- Shipping:
Inventory:6,970
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Product details
Overview
BZW04-5V8B 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 5.8 V, clamping voltage (VCL) of 10.5 V at 38 A (10/1000 µs), peak pulse power of 400 W, and operates up to 175 °C junction temperature-ideal for AC/DC input stage protection in industrial power supplies.
For engineers reviewing the BZW04-5V8B datasheet, BZW04-5V8B pinout, BZW04-5V8B application, or BZW04-5V8B equivalent, key selection criteria include bidirectional polarity, low clamping ratio (VCL/VBR ≈ 1.64), high ESD robustness (30 kV air/contact), junction capacitance of 3500 pF at 0 V, and compatibility with reflow soldering per J-STD-020 MSL level 1.
Technical Context
The BZW04-5V8B employs planar silicon junction technology optimized for low leakage (<1000 nA at VRM) and stable clamping performance across –55 °C to +175 °C operating range. Its bidirectional structure enables symmetric surge suppression on AC lines without polarity constraints.
It delivers 400 W peak pulse power under 10/1000 µs waveform and up to 2.3 kW under 8/20 µs, with dynamic resistance (RD) of 0.088 Ω-enabling fast response to transients while minimizing let-through energy to downstream circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 5.8 V - Maximum continuous reverse working voltage before conduction begins |
| Breakdown Voltage (VBR) | 6.45 V min at 1 mA - Ensures reliable triggering above normal operating voltage |
| Clamping Voltage (VCL) | 10.5 V at 38 A (10/1000 µs) - Limits surge-induced voltage seen by protected ICs |
| Peak Pulse Power (PPP) | 400 W (10/1000 µs) - Sustains repeated surges in industrial environments |
| Junction Capacitance (CJ) | 3500 pF at 0 V - Compatible with low-frequency AC line and DC bus protection |
| Leakage Current (IRM) | 1000 nA max at VRM - Minimizes standby power loss in always-on systems |
| Operating Junction Temp | –55 °C to +175 °C - Supports operation in high-temperature enclosures and SMPS designs |
Pinout & Package
DO-15 (JEDEC DO-204AC) axial-leaded package with matte tin-plated leads. Bidirectional symmetry means both terminals are electrically identical; no anode/cathode designation required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Surge current entry (bidirectional) | Accepts transient current from either direction; no polarity dependency |
| Cathode (Lead 2) | Surge current return (bidirectional) | Completes symmetrical clamping path; interchangeable with Lead 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables single-device protection of AC lines or floating DC rails without polarity concerns |
| IEC 61000-4-2 compliance (30 kV contact/air) | Meets highest ESD immunity class for industrial and medical equipment certification |
| High Tj max (175 °C) | Supports placement near heat-generating components (e.g., bridge rectifiers, transformers) |
| Low dynamic resistance (0.088 Ω) | Reduces clamping voltage overshoot during fast-rising transients (e.g., lightning-induced surges) |
| UL 497B certified (QVGQ2.E136224) | Validates suitability for telecom and signal-line protection in safety-critical infrastructure |
Applications
| Industrial AC Input Protection | Smart Meter Surge Suppression |
|---|---|
Use Scenario: Protecting metering ICs and isolation barriers against mains-borne surges in utility-grade smart meters. IC Role / Device Role / Timing Role: Primary front-end TVS device placed across L-N and L/N-PE inputs. Use Value: Clamps 4 kV IEC 61000-4-4 surges to <11 V, preserving accuracy of 24-bit ADCs and isolated RS-485 transceivers. |
Use Scenario: Safeguarding PLC I/O modules connected to field sensors exposed to induced lightning transients. IC Role / Device Role / Timing Role: Secondary-level TVS on analog input channels (0–10 V, 4–20 mA). Use Value: Withstands 30 kV ESD events without degradation, ensuring long-term calibration stability over 15-year field life. |
| AC/DC Adapter Input Stage | Motor Drive Control Board |
Use Scenario: Shielding bridge rectifier outputs and bulk capacitor inputs from differential-mode surges in Class II adapters. IC Role / Device Role / Timing Role: Bidirectional clamping between DC+ and DC– rails prior to primary-side controller. Use Value: Maintains 400 W surge rating at 125 °C ambient, enabling compact heatsink-free designs in enclosed adapters. |
Use Scenario: Protecting gate drivers and current-sense amplifiers from commutation-induced transients in BLDC inverters. IC Role / Device Role / Timing Role: Localized TVS on low-voltage control rails (e.g., 15 V bias supply). Use Value: Low 0.088 Ω RD limits voltage overshoot during 100 ns switching edges, preventing false triggering of overvoltage lockouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A | Unidirectional; 600 W (10/1000 µs); VBR = 6.4 V min; DO-214AA package | Requires polarity-aware layout; better suited for DC-only rails with defined ground reference | Select when unidirectional behavior is acceptable and board space allows SMB footprint |
| P6KE6.8CA | Unidirectional/bidirectional variant available; 600 W; VBR = 6.45–7.14 V; DO-15 package | Higher VCL (11.5 V at 35 A); lower ESD rating (15 kV contact) | Choose for cost-sensitive legacy designs where 30 kV ESD is not mandated |
Compared with SMBJ5.0A and P6KE6.8CA, BZW04-5V8B offers superior ESD immunity (30 kV vs ≤15 kV), identical DO-15 fit, and tighter VBR tolerance (±5% vs ±10%), making it preferred for new industrial designs requiring long-term reliability under harsh EMC conditions.
Availability
BZW04-5V8B is available at Aetrix Electronics and suitable for industrial AC input protection, smart meter surge suppression, AC/DC adapter input stages, and motor drive control boards requiring stable component supply and full traceability.
Supply support for BZW04-5V8B 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.
The BZW04 series belongs to ST's high-reliability TVS portfolio, engineered specifically for robust surge immunity in industrial power conversion, metering, and automation systems operating under extended thermal and EMC stress.
FAQ
What is the maximum clamping voltage of BZW04-5V8B under a 10/1000 µs surge?
The clamping voltage (VCL) is 10.5 V at 38 A for a 10/1000 µs waveform, measured at 25 °C ambient. This value increases with junction temperature at a coefficient of 5.7 × 10⁻⁴/°C, reaching ~11.2 V at 125 °C junction temperature per datasheet Equation 2.
Can BZW04-5V8B be used in AC line-to-line protection?
Yes-its bidirectional construction makes it ideal for L-N and L-L protection in 120/230 VAC systems. The 5.8 V VRM ensures no conduction during normal AC peaks (e.g., 325 Vpk for 230 VAC), while clamping remains effective for surges exceeding 1 kV.
Is BZW04-5V8B RoHS and REACH compliant?
Yes-BZW04-5V8B carries ST's ECOPACK2 environmental grade certification, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free matte tin plating and halogen-free epoxy molding compound.
How does junction temperature affect its surge capability?
Peak pulse power derates linearly with junction temperature: from 400 W at 25 °C to 230 W at 175 °C (Figure 3). Designers must calculate thermal resistance (Rth(j-a)) using PCB copper area per Figure 12 to ensure Tj stays within limits during repetitive surges.
BZW04-5V8B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- BZW04, TRANSIL™
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 38A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1750pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
BZW04-5V8B FAQ
1.How can I place an order for BZW04-5V8B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-5V8B 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 BZW04-5V8B reliable?
The price and inventory of BZW04-5V8B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-5V8B is usually 5 days.
3.What payment methods are accepted for BZW04-5V8B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-5V8B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-5V8B?
BZW04-5V8B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-5V8B 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 BZW04-5V8B?
For technical support, including BZW04-5V8B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-5V8B requirements.
6.How does Aetrix verify that BZW04-5V8B is sourced from the original manufacturer or authorized distributors?
All BZW04-5V8B 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 BZW04-5V8B meets industry standards.
7.What is the process for return or replacement of BZW04-5V8B?
All BZW04-5V8B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-5V8B, 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 BZW04-5V8B part is unused and in its original packaging.
Return procedure for BZW04-5V8B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-5V8B Tags
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