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Taiwan Semiconductor Corporation BZW04-6V4B
- Part No.:
- BZW04-6V4B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-6V4B.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,299
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Product details
Overview
BZW04-6V4B 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 6.4 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 - deployed in AC/DC power supplies, industrial sensor interfaces, and telecom line cards.
For engineers reviewing the BZW04-6V4B datasheet, BZW04-6V4B pinout, BZW04-6V4B application, or BZW04-6V4B equivalent, key selection criteria include bidirectional clamping behavior, low leakage (<1000 nA at VRM), high-temperature reliability (Tj = −55 to +175 °C), and compliance with IEC 61000-4-2 level 4 (±30 kV contact/air discharge) and UL 497B.
Technical Context
This TVS diode uses planar silicon junction technology to achieve low dynamic resistance (RD = 0.088 Ω at 10/1000 µs), stable clamping under repeated surges, and minimal capacitance drift across reverse bias (CJ ≈ 3500 pF at VR = 0 V). Its bidirectional architecture enables symmetrical surge suppression on differential lines without polarity constraints.
Thermal performance is optimized for high ambient operation: maximum peak pulse power drops to 230 W at Tj = 175 °C (10/1000 µs), and thermal resistance (Rth(j-a)) is 4.5 °C/W with 5 cm² copper area per lead on FR4 PCB - enabling robust placement near heat-generating components like MOSFETs or bridge rectifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 6.4 V - minimum reverse voltage before significant leakage; defines operating margin below clamping threshold |
| Breakdown Voltage (VBR) | 5.8–6.45 V at 1 mA - ensures predictable avalanche initiation during transients |
| Clamping Voltage (VCL) | 10.5 V at 38 A (10/1000 µs) - limits downstream IC voltage stress during 400 W surge events |
| Peak Pulse Power (PPP) | 400 W (10/1000 µs) - supports sustained surge handling in SMPS input stages and telecom ports |
| Junction Temperature Range | −55 to +175 °C - enables deployment in under-hood automotive modules and industrial motor drives |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2 level 4) - exceeds standard requirements for human-body-model immunity |
| Leakage Current (IRM) | ≤1000 nA at VRM - preserves signal integrity in high-impedance analog front-ends and battery-powered sensors |
Pinout & Package
DO-15 (JEDEC DO-204AC) axial-leaded package with matte tin-plated leads. Dimensions: A = 6.05–6.75 mm (body length), B = 26–31 mm (lead spacing), C = 2.95–3.53 mm (body diameter), D = 0.71–0.88 mm (lead diameter).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Reverse-biased terminal in unidirectional mode; symmetric terminal in bidirectional mode | Provides identical clamping response in both directions - no polarity marking required on PCB layout |
| Cathode (Lead 2) | Reverse-biased terminal in unidirectional mode; symmetric terminal in bidirectional mode | Enables direct replacement of unidirectional variants (e.g., BZW04-6V4) without redesigning trace routing |
Key Features
| Feature | Design Value |
|---|---|
| High-Temperature Operation | Rated for continuous use at Tj = 175 °C - eliminates derating concerns in enclosed power converters |
| Low Dynamic Resistance | RD = 0.088 Ω - minimizes voltage overshoot during fast-rising 8/20 µs surges (e.g., lightning-induced) |
| UL 497B Certification | File QVGQ2.E136224 - validates suitability for primary-side telecom and PoE interface protection |
| MSL Level 1 Compliance | J-STD-020 - allows unlimited floor life and reflow without baking, simplifying SMT assembly logistics |
| Whisker-Resistant Finish | JESD-201 Class 2 - prevents tin whisker growth in long-life industrial control systems |
Applications
| Industrial Sensor Interface | AC/DC Power Supply Input |
|---|---|
Use Scenario: Protecting 4–20 mA current-loop transmitters against field-induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across signal lines to shunt transient energy before it reaches precision op-amps or ADC inputs. Use Value: Maintains signal accuracy by limiting voltage excursion to ≤10.5 V during 400 W surges, preventing latch-up in 24 V rail-connected instrumentation. |
Use Scenario: Safeguarding bridge rectifier outputs and bulk capacitor inputs in offline SMPS used in LED drivers and PLC power modules. IC Role / Device Role / Timing Role: Primary-level TVS placed after fuse and before common-mode choke to absorb line-to-line and line-to-ground surges. Use Value: Withstands repeated 10/1000 µs surges up to 400 W while maintaining <1 µA leakage at 6.4 V - preserving efficiency and no-load regulation. |
| Telecom Line Card Protection | Automotive Body Control Module |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in outdoor base station backhaul units exposed to induced lightning currents. IC Role / Device Role / Timing Role: Differential-mode TVS mounted across twisted-pair traces to clamp common-mode transients without distorting data signals. Use Value: ±30 kV ESD immunity and 10.5 V clamping enable reliable operation in unshielded outdoor enclosures per IEC 61000-4-5 level 3. |
Use Scenario: Guarding LIN bus nodes and door module microcontrollers against load-dump and jump-start transients in passenger vehicles. IC Role / Device Role / Timing Role: Secondary-level TVS connected between LIN line and chassis ground to suppress coupled spikes from alternator switching. Use Value: Operates reliably at −40 to +125 °C ambient (derated to 175 °C junction), meeting AEC-Q101 stress test requirements for under-hood electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.0A | Unidirectional; VRM = 6.0 V; VCL = 10.3 V at 38.9 A; DO-214AA package | Requires polarity-aware PCB layout; lower thermal mass than DO-15 - less suitable for repeated surge duty cycles | Select when space-constrained designs demand SMD mounting and unidirectional protection suffices |
| P6KE6.8CA | Unidirectional/bidirectional variant available; VRM = 6.8 V; VCL = 11.2 V at 35.7 A; DO-15 package | Higher clamping voltage increases risk of downstream IC overvoltage; lower PPP (600 W) but only rated for 1.5× surge duration | Choose only if legacy design reuse mandates P6KE footprint compatibility and 11.2 V clamping is acceptable |
Compared with SMBJ6.0A and P6KE6.8CA, BZW04-6V4B offers superior thermal endurance (230 W at 175 °C), tighter clamping (10.5 V), and native bidirectionality - making it optimal for new designs requiring robust, polarity-agnostic surge suppression in high-temperature environments.
Availability
BZW04-6V4B is available at Aetrix Electronics and suitable for industrial sensor interfaces, AC/DC power supply inputs, and telecom line card protection requiring stable component supply across extended product lifecycles.
Supply support for BZW04-6V4B 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 microcontroller technologies for industrial, automotive, and consumer markets.
BZW04 belongs to ST's high-reliability TVS diode portfolio targeting harsh-environment applications - engineered for stable clamping performance across −55 to +175 °C and compliance with UL, IEC, and MIL-STD surge/ESD standards.
FAQ
What is the maximum surge current BZW04-6V4B can handle at 10/1000 µs?
BZW04-6V4B sustains 38 A peak pulse current at 10/1000 µs with a clamping voltage of 10.5 V, corresponding to its 400 W peak pulse power rating. At elevated junction temperatures (e.g., 175 °C), this derates to 230 W - approximately 22 A under identical waveform conditions, as confirmed in Figure 3 of DS0660 Rev 4.
Is BZW04-6V4B compatible with lead-free reflow soldering?
Yes - BZW04-6V4B meets J-STD-020 MSL Level 1 and is qualified for lead-free reflow with a peak temperature of 240–245 °C for 60 seconds (max 90 s), per ST's recommended profile in Figure 20 of DS0660 Rev 4. Matte tin plating ensures wetting reliability without post-solder cleaning.
How does its bidirectional configuration affect PCB layout versus unidirectional TVS diodes?
BZW04-6V4B has no anode/cathode polarity designation - both leads are functionally identical - allowing placement across any two points needing symmetrical surge suppression (e.g., differential pairs or AC lines). Unlike unidirectional types, it eliminates orientation checks during automated assembly and avoids reverse-bias failure modes in AC-coupled circuits.
Does BZW04-6V4B meet automotive qualification standards?
BZW04-6V4B is not AEC-Q101 qualified, but its −55 to +175 °C operating range, 175 °C max junction temperature, and robust surge ratings make it suitable for non-safety-critical automotive applications such as body control modules and LIN bus protection - provided system-level validation confirms compliance with ISO 7637-2 and ISO 16750-2 transient profiles.
BZW04-6V4B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- BZW04
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 35.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04-6V4B FAQ
1.How can I place an order for BZW04-6V4B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-6V4B 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 BZW04-6V4B reliable?
The price and inventory of BZW04-6V4B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-6V4B is usually 5 days.
3.What payment methods are accepted for BZW04-6V4B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-6V4B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-6V4B?
BZW04-6V4B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-6V4B 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 BZW04-6V4B?
For technical support, including BZW04-6V4B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-6V4B requirements.
6.How does Aetrix verify that BZW04-6V4B is sourced from the original manufacturer or authorized distributors?
All BZW04-6V4B 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 BZW04-6V4B meets industry standards.
7.What is the process for return or replacement of BZW04-6V4B?
All BZW04-6V4B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-6V4B, 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 BZW04-6V4B part is unused and in its original packaging.
Return procedure for BZW04-6V4B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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