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Vishay General Semiconductor - Diodes Division BZW04-31B-E3/54
- Part No.:
- BZW04-31B-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-31B-E3/54.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,700
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Product details
Overview
BZW04-31B-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on signal or power lines. It features 30.8 V standoff voltage (VWM), 34.2–37.8 V breakdown voltage (VBR) at 1 mA, 49.9 V maximum clamping voltage (VC) at 8.0 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, sensor interfaces, and industrial control I/O against ESD and inductive switching surges.
For engineers reviewing the BZW04-31B-E3/54 datasheet, BZW04-31B-E3/54 pinout, BZW04-31B-E3/54 application, or BZW04-31B-E3/54 equivalent, this device serves as a RoHS-compliant, AEC-Q101-qualified transient suppressor for bidirectional AC-coupled or floating signal paths where polarity-agnostic surge protection is required without DC bias constraints.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and leakage characteristics across forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive 10/1000 μs transients at 0.01% duty cycle.
The device is rated for -55 °C to +175 °C operating junction temperature and supports soldering per JESD 22-B106 (275 °C max, 10 s). Its DO-41 package provides mechanical robustness and UL 94 V-0 flammability compliance, while the matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - Maximum continuous working voltage before clamping begins; defines safe operating range for protected circuit. |
| VBR (min/max) | 34.2 V / 37.8 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 49.9 V at 8.0 A - Clamped voltage seen by downstream circuitry during 10/1000 μs surge; limits stress on ICs or transistors. |
| PPPM | 400 W - Peak pulse power handling capability; sustains transient energy without failure under standard test conditions. |
| IPPM | 8.0 A - Maximum non-repetitive peak pulse current supported; determines minimum series impedance needed for protection. |
| TJ max. | +175 °C - Maximum junction temperature; enables operation in high-ambient industrial or automotive under-hood environments. |
| Leakage @ VWM | 1.0 μA - Reverse leakage at standoff voltage; negligible loading on high-impedance sensor or communication lines. |
Pinout & Package
DO-41 (DO-204AL) axial-leaded package with no polarity marking - consistent with bidirectional functionality. Leads are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in either direction; no cathode band marking required. |
| Lead 1 / Lead 2 | Connection interface | Axial leads enable through-hole mounting; lead length ≥ 0.375" (9.5 mm) recommended for thermal relief per Fig. 6. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable, repeatable breakdown voltage and long-term reliability under thermal cycling and humidity exposure. |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients from inductive load switching or lightning-induced surges without degradation. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation essential for industrial safety certifications and enclosed system designs. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision for sensitive analog inputs. |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Protection of encoder feedback lines and gate driver signal traces against back-EMF spikes from brushed DC or stepper motor commutation. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector or PCB edge to shunt transient energy before reaching MCU GPIO or isolated gate driver. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic inputs while maintaining signal integrity due to low 1.0 μA leakage at 30.8 V. |
Use Scenario: Surge suppression on LIN bus or analog output lines of pressure, temperature, or position sensors in engine bay or chassis modules. IC Role / Device Role / Timing Role: Standoff-clamp TVS positioned between sensor output and microcontroller ADC input or transceiver, operating without DC bias dependency. Use Value: Enables AEC-Q101-compliant design with 49.9 V clamping ceiling that stays below absolute maximum ratings of automotive-grade op-amps and CAN/LIN transceivers. |
| Telecom Line Interface | Consumer Appliance Power Supply |
|
Use Scenario: Secondary-side transient protection on RS-485 or Ethernet PHY signal pairs exposed to field wiring in building automation systems. IC Role / Device Role / Timing Role: Symmetric bidirectional clamp ensuring equal response to positive/negative line-to-line surges, eliminating need for dual unidirectional devices. Use Value: Reduces BOM count and board space versus discrete unidirectional solutions while delivering matched 34.2–37.8 V VBR tolerance across both polarities. |
Use Scenario: Input-stage protection for SMPS feedback optocoupler circuits or microcontroller reset lines subjected to mains-borne transients in washing machines or HVAC controllers. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA) standoff protector that avoids false triggering during normal 24 V or 12 V rail operation while responding within nanoseconds to fast transients. Use Value: Maintains system reliability across extended temperature range (-55 °C to +175 °C) and meets IEC 61000-4-2/4-4 immunity requirements when combined with appropriate series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | DO-214AA package; 33 V VWM, 49.9 V VC at 8.1 A; same 400 W PPPM but surface-mount format. | Requires PCB re-layout for SMD placement; better suited for high-density consumer electronics vs. through-hole industrial modules. | Select SMBJ33CA when board space is constrained and automated assembly is preferred; BZW04-31B-E3/54 remains optimal for manual repair, high-voltage creepage, or legacy through-hole designs. |
| P6KE33CA | DO-15 package; 33 V VWM, 53.3 V VC at 7.5 A; lower clamping ratio and higher VC than BZW04-31B-E3/54. | Higher clamping voltage may exceed safe limits for 3.3 V logic; suitable only where protected ICs tolerate >53 V transient exposure. | Choose BZW04-31B-E3/54 over P6KE33CA when tighter clamping (49.9 V) and lower leakage (1.0 μA) are critical for modern low-voltage microcontrollers or precision analog circuits. |
Compared with SMBJ33CA and P6KE33CA, BZW04-31B-E3/54 delivers superior clamping precision (49.9 V), lower leakage (1.0 μA), and AEC-Q101 qualification in a proven through-hole DO-41 package - making it the preferred choice for industrial control, automotive sensor nodes, and applications requiring field-serviceable, thermally robust transient protection.
Availability
BZW04-31B-E3/54 is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, telecom line protection, and consumer appliance power supply designs requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for BZW04-31B-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 power MOSFETs with emphasis on reliability, ruggedness, and automotive-grade qualification.
The BZW04 series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy bidirectional transient suppression in harsh environments - targeting industrial automation, automotive electronics, and infrastructure equipment.
FAQ
What is the standoff voltage (VWM) of the BZW04-31B-E3/54?
The BZW04-31B-E3/54 has a standoff voltage (VWM) of 30.8 V, meaning it remains non-conductive up to this DC or RMS voltage level. This value ensures compatibility with 24 V industrial control systems and 3.3 V/5 V logic rails when used with appropriate series impedance, preventing false triggering during normal operation while enabling rapid clamping above threshold.
Is the BZW04-31B-E3/54 suitable for automotive applications?
Yes, the BZW04-31B-E3/54 is AEC-Q101 qualified and rated for -55 °C to +175 °C junction temperature, making it suitable for under-hood and chassis-mounted automotive applications. Its bidirectional symmetry, low leakage (1.0 μA), and 49.9 V clamping voltage align with requirements for protecting LIN bus transceivers, analog sensor outputs, and microcontroller I/O in modern vehicle ECUs.
How does the BZW04-31B-E3/54 differ from unidirectional TVS diodes like BZW04-31-E3/54?
The BZW04-31B-E3/54 is bidirectional with symmetrical electrical characteristics in both polarities and no cathode marking, whereas BZW04-31-E3/54 is unidirectional with a cathode band and conducts only in reverse bias. The "B" suffix indicates bidirectional function, enabling use on AC-coupled or floating lines where polarity is undefined - critical for RS-485, transformer-isolated interfaces, or differential sensor outputs.
What is the maximum clamping voltage (VC) of the BZW04-31B-E3/54 under surge conditions?
The BZW04-31B-E3/54 has a maximum clamping voltage (VC) of 49.9 V at 8.0 A peak pulse current with a 10/1000 μs waveform. This value represents the highest voltage imposed on the protected circuit during standardized surge testing and confirms its ability to limit transient stress well below typical 50–60 V absolute maximum ratings of industrial-grade microcontrollers and interface ICs.
Does the BZW04-31B-E3/54 require heatsinking for continuous operation?
No, the BZW04-31B-E3/54 is rated for 1.5 W power dissipation on an infinite heatsink at 75 °C lead temperature (PD), but it is intended for transient-only operation - not continuous power dissipation. Its 400 W peak pulse rating applies to short-duration events (≤1000 μs), and thermal design focuses on PCB copper area and lead length per Vishay's Fig. 5 derating curve, not external heatsinks.
BZW04-31B-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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 8A
- 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)
BZW04-31B-E3/54 FAQ
1.How can I place an order for BZW04-31B-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-31B-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 BZW04-31B-E3/54 reliable?
The price and inventory of BZW04-31B-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 BZW04-31B-E3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-31B-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-31B-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-31B-E3/54?
BZW04-31B-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-31B-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 BZW04-31B-E3/54?
For technical support, including BZW04-31B-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-31B-E3/54 requirements.
6.How does Aetrix verify that BZW04-31B-E3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-31B-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 BZW04-31B-E3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-31B-E3/54?
All BZW04-31B-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-31B-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 BZW04-31B-E3/54 part is unused and in its original packaging.
Return procedure for BZW04-31B-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-31B-E3/54 Tags
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