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Vishay General Semiconductor - Diodes Division BZW04-256B-E3/54
- Part No.:
- BZW04-256B-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-256B-E3/54.pdf
- Description:
- TVS DIODE 256VWM 414VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,137
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Product details
Overview
BZW04-256B-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for robust overvoltage protection of signal and power lines. It features a 256 V stand-off voltage (VWM), 285–315 V breakdown voltage (VBR) at 1 mA test current, 400 W peak pulse power (10/1000 μs), 414 V clamping voltage (VC) at 1.0 A peak pulse current, and operates across –55 °C to +175 °C junction temperature range - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the BZW04-256B-E3/54 datasheet, BZW04-256B-E3/54 pinout, BZW04-256B-E3/54 application, or BZW04-256B-E3/54 equivalent, this page delivers verified electrical parameters, DO-41 terminal mapping, bidirectional clamping behavior, AEC-Q101 qualification status, and direct alternatives for surge protection design validation.
Technical Context
This device implements a glass-passivated silicon p-n junction structure optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional symmetry ensures identical clamping performance in both polarities, with no polarity marking on the DO-41 case.
The 400 W peak pulse rating is specified under standardized 10/1000 μs waveform conditions at 0.01% duty cycle, and thermal derating follows a defined curve down to zero power at 175 °C junction temperature. Reverse leakage remains ≤1.0 μA at 256 V stand-off, supporting high-impedance circuit integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 256 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for protected line. |
| VBR (min/max) | 285 V / 315 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients. |
| VC @ IPPM | 414 V at 1.0 A - Clamped voltage during 400 W surge event; determines maximum stress imposed on downstream ICs. |
| PPPM | 400 W - Peak pulse power handling per 10/1000 μs waveform; validates immunity to IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 μA - Ultra-low reverse leakage at rated stand-off; preserves signal integrity in high-impedance sensor paths. |
| TJ Range | –55 °C to +175 °C - Extended thermal capability enabling use in under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - Meets stress-test requirements for automotive electronics reliability (temperature cycling, HTRB, etc.). |
Pinout & Package
DO-41 (DO-204AL) axial-leaded package with matte tin-plated leads; compliant with J-STD-002 and JESD22-B102 solderability standards. No polarity marking - symmetric bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (either lead) | Transient conduction path | Identical bidirectional clamping behavior; either lead may connect to protected line or ground - no orientation dependency. |
| Case body | Mechanical mounting surface | Non-conductive epoxy molding meets UL 94 V-0; provides mechanical stability and environmental isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| 400 W peak pulse power (10/1000 μs) | Supports robust protection against lightning-induced surges and inductive switching spikes in industrial control systems. |
| AEC-Q101 qualification | Validates suitability for automotive applications including body electronics, infotainment power rails, and sensor modules. |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes overvoltage overshoot during clamping - critical for safeguarding 3.3 V or 5 V logic-level interface ICs. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation required for safety-critical end equipment certifications (IEC 62368, UL 62368). |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (RS-485, CAN) in PLC modules exposed to ESD and load dump events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to shunt transient energy before it reaches precision ADCs or transceivers. Use Value: Limits induced transients to ≤414 V, preserving signal chain accuracy and preventing latch-up in connected microcontrollers. |
Use Scenario: Shielding Ethernet PHY power rails and data pairs in PoE-powered access points from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary front-end TVS on DC input and differential data lanes, operating in parallel with gas discharge tubes for staged protection. Use Value: Fast <1 ns response captures initial surge edge; 400 W rating handles multi-kV common-mode transients without degradation. |
| Automotive Body Control Module | Consumer Appliance Power Supply |
Use Scenario: Safeguarding LIN bus transceivers and window motor driver ICs against battery reverse connection and load dump pulses. IC Role / Device Role / Timing Role: Bidirectional suppressor on LIN signal line and 12 V supply rail, leveraging AEC-Q101 qualification for automotive-grade deployment. Use Value: Withstands 175 °C junction temperature and maintains ≤1.0 μA leakage at 256 V - ensuring fail-safe operation in engine bay proximity. |
Use Scenario: Overvoltage suppression on AC input stage and DC bus of smart appliance SMPS (e.g., washing machine main board). IC Role / Device Role / Timing Role: Secondary surge clamp after MOV, providing precise clamping and low capacitance to avoid EMI filter interaction. Use Value: UL 94 V-0 epoxy and 400 W rating meet IEC 60335-1 insulation and surge withstand requirements for Class II appliances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ250CA | DO-214AA package; 250 V VWM, 278–308 V VBR, 400 W PPPM, 408 V VC; higher surge current rating (1.05 A) but larger footprint. | Surface-mount alternative requiring PCB layout change; better suited for automated assembly and space-constrained designs. | Select SMBJ250CA when SMT placement, higher IPPM, or tighter VBR tolerance (±5%) is prioritized over through-hole serviceability. |
| P6KE250CA | DO-15 package; 250 V VWM, 278–308 V VBR, 600 W PPPM, 410 V VC; higher power rating but lower thermal endurance above 25 °C. | Legacy through-hole option with greater surge headroom but less stringent AEC-Q101 compliance coverage. | Choose P6KE250CA only for non-automotive applications where 600 W peak power is mandatory and AEC-Q101 is not required. |
Compared with BZW04-256B-E3/54, SMBJ250CA offers SMT compatibility and tighter VBR control, while P6KE250CA trades AEC-Q101 qualification for higher single-pulse energy handling - making BZW04-256B-E3/54 the optimal choice for automotive-qualified, DO-41-restricted, and thermally demanding deployments.
Availability
BZW04-256B-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and consumer appliance power supplies requiring stable component supply and long-term lifecycle support.
Supply support for BZW04-256B-E3/54 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The BZW04 series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for bidirectional transient suppression in harsh environments - emphasizing low clamping ratio, AEC-Q101 compliance, and stable parametric performance over temperature.
FAQ
What is the clamping voltage of BZW04-256B-E3/54 under a 400 W transient?
The BZW04-256B-E3/54 exhibits a maximum clamping voltage (VC) of 414 V when subjected to its rated 400 W peak pulse power with a 10/1000 μs waveform. This value is measured at 1.0 A peak pulse current and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is BZW04-256B-E3/54 suitable for automotive applications?
Yes, BZW04-256B-E3/54 is AEC-Q101 qualified, confirming its reliability for automotive use cases including body control modules, LIN bus protection, and power rail surge suppression. Its –55 °C to +175 °C operating junction temperature range and robust DO-41 construction support deployment in under-hood and cabin environments where thermal and mechanical stress are elevated.
Does BZW04-256B-E3/54 have polarity markings?
No, BZW04-256B-E3/54 is a bidirectional TVS diode and carries no polarity marking on its DO-41 package. Both leads are functionally identical - the device clamps symmetrically in either direction, eliminating orientation concerns during through-hole assembly and simplifying board layout.
What is the reverse leakage current of BZW04-256B-E3/54 at its rated stand-off voltage?
At its 256 V stand-off voltage (VWM) and 25 °C ambient temperature, the BZW04-256B-E3/54 exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and prevents unwanted loading on precision analog or communication lines.
How does the DO-41 package of BZW04-256B-E3/54 support manufacturability?
The DO-41 package of BZW04-256B-E3/54 features matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards, enabling reliable wave and selective soldering. Its UL 94 V-0 epoxy molding supports safety certification, while the 0.350 g unit weight and E3/54 tape-and-reel packaging (550 units per reel) align with standard SMT feeder and manual assembly workflows.
BZW04-256B-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 1A
- 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)
BZW04-256B-E3/54 FAQ
1.How can I place an order for BZW04-256B-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-256B-E3/54 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 BZW04-256B-E3/54 reliable?
The price and inventory of BZW04-256B-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-256B-E3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-256B-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-256B-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-256B-E3/54?
BZW04-256B-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-256B-E3/54 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 BZW04-256B-E3/54?
For technical support, including BZW04-256B-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-256B-E3/54 requirements.
6.How does Aetrix verify that BZW04-256B-E3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-256B-E3/54 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 BZW04-256B-E3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-256B-E3/54?
All BZW04-256B-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-256B-E3/54, 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 BZW04-256B-E3/54 part is unused and in its original packaging.
Return procedure for BZW04-256B-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-256B-E3/54 Tags
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