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Vishay General Semiconductor - Diodes Division BZW04-26-E3/54
- Part No.:
- BZW04-26-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-26-E3/54.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,394
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Product details
Overview
BZW04-26-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for circuit-level ESD and surge protection. It features a 25.6 V standoff voltage (VWM), 28.5–31.5 V breakdown voltage (VBR) at 1 mA, 41.5 V clamping voltage (VC) at 9.6 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and signal lines of industrial sensor interfaces.
For engineers reviewing the BZW04-26-E3/54 datasheet, BZW04-26-E3/54 pinout, BZW04-26-E3/54 application, or BZW04-26-E3/54 equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, DO-41 mechanical dimensions, and real-world protection use cases for automotive-grade and industrial embedded systems.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM), while the DO-41 package supports manual and automated through-hole assembly with JESD22-B102-compliant solderability.
Thermal performance is defined by 1.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C and full derating above TA = 25 °C per Figure 2. Junction temperature range spans −55 °C to +175 °C, enabling operation in under-hood automotive and high-ambient industrial environments without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 25.6 V - maximum continuous reverse operating voltage before conduction begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 28.5 V / 31.5 V at IT = 1 mA - precise avalanche onset range ensuring predictable clamping activation across production lots. |
| VC @ IPPM | 41.5 V at 9.6 A (10/1000 μs) - clamped voltage seen by protected IC during worst-case surge; defines minimum safe margin for downstream logic. |
| PPPM | 400 W - peak transient energy handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 24 V systems. |
| IFSM | 40 A (8.3 ms half-sine) - forward surge rating confirming robustness against accidental polarity reversal or inrush events. |
| TJ max. | +175 °C - enables reliable operation in engine control units, motor drives, and industrial PLCs where ambient exceeds 125 °C. |
| Qualification | AEC-Q101 qualified - validated for automotive electronics per stress test requirements including HTRB, HTGB, and temperature cycling. |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with axial leads; cathode indicated by color band on body. Matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 wetting requirements. Package outline conforms to JEDEC DO-41 standard: 25.4 mm overall length, 5.2 mm body diameter, 2.7 mm lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during forward surge or miswiring events. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail or CAN_H); avalanches into conduction when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %) and <1 μA leakage at VWM over lifetime and temperature extremes. |
| 400 W peak pulse power (10/1000 μs) | Supports repeated surge events per IEC 61000-4-5 without parameter shift or degradation - critical for field-deployed equipment. |
| AEC-Q101 qualification | Validates reliability for automotive applications including powertrain, body electronics, and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, reducing stress on protected MOSFET gates and microcontroller I/O pins. |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosure-mounted protection circuits, meeting safety standards for industrial control panels. |
Applications
| Industrial Sensor Interface Protection | Automotive Power Rail Clamping |
|---|---|
|
Use Scenario: 24 V analog sensor outputs (e.g., pressure, temperature) exposed to load dump and inductive switching noise in factory automation cabinets. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between sensor output and ground, triggered only during positive overvoltage events. Use Value: Limits transient voltage to ≤41.5 V, protecting 3.3 V or 5 V ADC inputs and op-amp front-ends from damage or latch-up. |
Use Scenario: 12 V/24 V battery-fed ECUs subjected to ISO 7637-2 Pulse 1 (−150 V) and Pulse 3a/b (±100 V) transients. IC Role / Device Role / Timing Role: Primary clamping device on main supply rail, coordinated with upstream fuse and downstream DC/DC converter input capacitors. Use Value: Absorbs up to 400 W for 1 ms, preventing brownout or reset of microcontrollers during cold-crank or alternator load dump events. |
| Motor Drive Gate Driver Protection | Telecom Line Surge Suppression |
|
Use Scenario: High-side N-channel MOSFET gate drive lines in BLDC inverters, vulnerable to Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: Fast-response clamp between gate and source, activated within nanoseconds to suppress dv/dt-induced overshoot. Use Value: Clamps gate-source voltage to ≤41.5 V, avoiding oxide breakdown and ensuring reliable MOSFET turn-off under dynamic load conditions. |
Use Scenario: RS-485 data lines in outdoor telecom base stations exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamp precision for transceiver ICs. Use Value: Delivers sub-100 ns response and 41.5 V clamping to protect MAX1487 or SN65HVD7x transceivers without signal distortion or false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A | DO-214AA package (SMB), 26 V VWM, 400 W PPPM, but bidirectional configuration by default; unidirectional version requires suffix "A". | Surface-mount footprint; higher thermal resistance than DO-41; better suited for PCB space-constrained designs vs. through-hole reliability focus. | Select SMBJ26A only if SMT assembly is mandatory and board layout allows thermal relief for SMB package; verify clamping curve alignment with system surge profile. |
| P6KE27A | DO-15 package, 27 V VWM, 600 W PPPM, but slower response and higher VC (45.7 V @ 13.1 A); not AEC-Q101 qualified. | Higher peak power but looser VBR tolerance (±10 %) and no automotive qualification; suitable for cost-sensitive industrial use only. | Choose P6KE27A for non-automotive applications where 600 W headroom outweighs tighter clamping and qualification needs; avoid in AEC-Q101-mandated designs. |
Compared with BZW04-26-E3/54, SMBJ26A offers SMT compatibility at the expense of thermal robustness and automotive validation, while P6KE27A trades qualification and precision for higher surge capacity - making BZW04-26-E3/54 optimal for through-hole automotive and high-reliability industrial deployments requiring guaranteed AEC-Q101 compliance and tight VBR control.
Availability
BZW04-26-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interface protection, automotive power rail clamping, motor drive gate driver protection, and telecom line surge suppression requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for BZW04-26-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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The BZW04 series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven, qualified components.
FAQ
What is the exact standoff voltage (VWM) and breakdown voltage range for BZW04-26-E3/54?
The BZW04-26-E3/54 has a standoff voltage VWM of 25.6 V and a breakdown voltage VBR range of 28.5 V to 31.5 V at 1 mA test current, as specified in the Vishay datasheet document 88316. These values are measured at TA = 25 °C and define the device's conduction threshold and operational margin. The BZW04-26-E3/54 maintains this specification across its qualified temperature range and is rated for repetitive surge duty cycles up to 0.01 %.
Is BZW04-26-E3/54 unidirectional or bidirectional, and how is polarity marked?
BZW04-26-E3/54 is a unidirectional TVS diode, with the cathode end identified by a color band on the DO-41 package body. This marking aligns with industry-standard polarity identification for axial-leaded diodes and ensures correct orientation during through-hole assembly. The BZW04-26-E3/54 does not support bidirectional operation - for symmetrical clamping, the BZW04-26B variant must be selected instead.
Does BZW04-26-E3/54 meet AEC-Q101 qualification, and what tests does that include?
Yes, BZW04-26-E3/54 is AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 16-Sep-2021. This qualification covers stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling, and unbiased highly accelerated stress testing (uHAST). The BZW04-26-E3/54 carries the HE3 suffix for AEC-Q101 grade, though the E3/54 variant remains commercial-grade; both share identical electrical specs and packaging.
What is the clamping voltage (VC) of BZW04-26-E3/54 under a 10/1000 μs surge, and why does it matter?
The BZW04-26-E3/54 clamps to a maximum of 41.5 V at 9.6 A peak pulse current under the standardized 10/1000 μs waveform. This value directly determines the maximum voltage imposed on protected circuitry during surge events - for example, ensuring 3.3 V or 5 V microcontrollers remain below absolute maximum ratings. The BZW04-26-E3/54 achieves this with low incremental surge resistance, minimizing overshoot beyond VC during fast-rising transients.
Can BZW04-26-E3/54 be used in place of BZW04-26B, and what is the key functional difference?
No - BZW04-26-E3/54 is unidirectional and intended for single-polarity clamping (e.g., 24 V rail to ground), whereas BZW04-26B is bidirectional and protects AC-coupled or differential lines like RS-485 or CAN. Substituting BZW04-26-E3/54 for BZW04-26B would leave negative-going transients unprotected. The BZW04-26-E3/54 and BZW04-26B share identical VWM, VBR, and PPPM, but differ fundamentally in polarity architecture and application scope.
BZW04-26-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 9.6A
- 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)
BZW04-26-E3/54 FAQ
1.How can I place an order for BZW04-26-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-26-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 BZW04-26-E3/54 reliable?
The price and inventory of BZW04-26-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 BZW04-26-E3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-26-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-26-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-26-E3/54?
BZW04-26-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-26-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 BZW04-26-E3/54?
For technical support, including BZW04-26-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-26-E3/54 requirements.
6.How does Aetrix verify that BZW04-26-E3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-26-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 BZW04-26-E3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-26-E3/54?
All BZW04-26-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-26-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 BZW04-26-E3/54 part is unused and in its original packaging.
Return procedure for BZW04-26-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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