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Vishay General Semiconductor - Diodes Division BZW04P31-E3/73
- Part No.:
- BZW04P31-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P31-E3/73.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BZW04P31-E3/73 from Vishay General Semiconductor is a bi-directional TransZorb® transient voltage suppressor (TVS) diode designed for robust overvoltage protection in signal and power lines. It features a 30.8 V stand-off voltage (VWM), 49.9 V clamping voltage (VC) at 8.0 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) capability with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the BZW04P31-E3/73 datasheet, BZW04P31-E3/73 pinout, BZW04P31-E3/73 application, or BZW04P31-E3/73 equivalent, key selection criteria include its DO-204AL (DO-41) axial package, AEC-Q101 qualification, bi-directional symmetry, low clamping ratio (VC/VWM ≈ 1.62), and temperature coefficient of breakdown voltage (0.099 %/°C).
Technical Context
This bi-directional TVS diode uses a glass passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective clamping of ESD, lightning-induced transients, and inductive switching spikes. Its symmetrical breakdown behavior (VBR min/max = 34.2 V / 39.6 V at 1 mA) ensures identical protection in both polarities without polarity marking.
The device operates across –55 °C to +175 °C junction temperature range and maintains stable performance under repetitive 0.01% duty cycle pulses. Its 1.5 W steady-state power dissipation (PD) and 1000 μA max reverse leakage at VWM support reliable operation in always-on protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - maximum continuous reverse operating voltage before clamping begins; defines safe working margin for protected circuitry. |
| VC @ IPPM | 49.9 V at 8.0 A - clamped voltage during 10/1000 μs surge; limits stress on downstream ICs like microcontrollers or RS-485 transceivers. |
| PPPM | 400 W - peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity. |
| VBR | 34.2–39.6 V at 1 mA - breakdown voltage range; tight tolerance enables predictable turn-on and minimal overshoot during transients. |
| TJ max | +175 °C - maximum junction temperature; allows use in under-hood automotive environments and high-ambient industrial settings. |
| Package | DO-204AL (DO-41) - axial leaded, UL 94 V-0 molded epoxy package; compatible with wave soldering (275 °C, 10 s) and J-STD-002. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
DO-204AL (DO-41) axial package: cylindrical glass-passivated chip in molded epoxy body, matte tin-plated leads, no polarity marking (bi-directional). Lead diameter: 0.023–0.026 in (0.58–0.66 mm); body length: ≥1.0 in (25.4 mm); body diameter: 0.160–0.205 in (4.1–5.2 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals; either lead serves as input/output for transient energy diversion in both directions. |
| Lead 1 | Terminal 1 | Electrically identical to Lead 2; used for PCB mounting and thermal conduction; no marking required per bi-directional design. |
| Lead 2 | Terminal 2 | Electrically identical to Lead 1; provides mechanical anchoring and heat path to board copper; solderable per JESD22-B102. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485, encoder outputs) without polarity concerns. |
| 400 W 10/1000 μs rating | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications with minimal layout impact. |
| AEC-Q101 qualification | Validates reliability for automotive electronics including engine control modules, body controllers, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes voltage overshoot during surge events, reducing risk of latch-up or damage to 3.3 V/5 V logic and analog front-ends. |
| Glass passivated junction | Ensures stable leakage current (<1000 μA at VWM) and long-term parameter stability under thermal and humidity stress. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting wheel speed sensor or crankshaft position sensor signal lines from load dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bi-directional TVS placed across differential pair or single-ended output to clamp transients before reaching MCU ADC or comparator input. Use Value: Prevents false triggering and sensor failure by limiting transient voltage to ≤49.9 V while maintaining <1000 μA leakage at 30.8 V nominal supply. |
Use Scenario: Safeguarding RS-485 transceiver (e.g., SN65HVD230) data lines against ESD and surge in factory automation networks. IC Role / Device Role / Timing Role: Paired TVS devices on A/B lines to absorb common-mode and differential surges without distorting signal integrity. Use Value: Enables >15 kV HBM ESD protection and 1 kV IEC 61000-4-5 surge immunity while adding <0.5 pF junction capacitance at VWM. |
| Telecom Line Surge Suppression | Consumer Appliance Motor Control |
|
Use Scenario: Shielding DSL or POTS line interface ICs from lightning-induced surges entering via telephone wiring. IC Role / Device Role / Timing Role: Primary protection device mounted at connector entry point, upstream of GDT or secondary TVS stages. Use Value: Absorbs up to 400 W transient energy with 49.9 V clamping, preventing damage to line driver/receiver silicon while surviving repeated events. |
Use Scenario: Protecting microcontroller GPIOs driving relay coils or small BLDC motor drivers in smart home appliances. IC Role / Device Role / Timing Role: Clamp inductive flyback voltage spikes generated when MOSFETs switch off inductive loads. Use Value: Limits flyback voltage to 49.9 V, avoiding gate oxide rupture in 60 V-rated MOSFETs and ensuring reliable reset of MCU inputs. |
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 (SMB) package; 33 V VWM; 53.3 V VC @ 7.5 A; same 400 W PPPM rating but higher clamping ratio (1.62 vs. 1.61). | Surface-mount alternative requiring PCB redesign; better suited for high-density layouts where axial leads are impractical. | Select SMBJ33CA when space-constrained SMT assembly is required and thermal coupling to copper pour can be optimized. |
| P6KE33CA | DO-15 package; 33 V VWM; 53.3 V VC @ 7.5 A; lower 600 W PPPM rating but larger case size and higher thermal mass. | Higher surge margin for infrequent high-energy events; less suitable for AEC-Q101 automotive due to non-qualified status. | Choose P6KE33CA for cost-sensitive industrial equipment where AEC-Q101 is not mandated and higher single-pulse robustness is prioritized. |
Compared with SMBJ33CA and P6KE33CA, BZW04P31-E3/73 offers AEC-Q101 qualification in a compact DO-41 axial form factor with tighter VBR tolerance (±8%) and verified automotive-grade whisker resistance (JESD201 Class 1A), making it optimal for production automotive and harsh-environment embedded systems.
Availability
BZW04P31-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for BZW04P31-E3/73 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 performance.
The BZW04P series belongs to Vishay's TransZorb® TVS family, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications infrastructure where fast response, low clamping, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of BZW04P31-E3/73 and how is it measured?
The clamping voltage (VC) of BZW04P31-E3/73 is 49.9 V, measured at 8.0 A peak pulse current using a 10/1000 μs double-exponential waveform per IEC 61000-4-5. This value represents the maximum voltage seen across the device during standardized surge testing and directly determines the protection level delivered to downstream circuitry in the BZW04P31-E3/73 application.
Is BZW04P31-E3/73 suitable for automotive applications?
Yes, BZW04P31-E3/73 is AEC-Q101 qualified and rated for operation from –55 °C to +175 °C, making it suitable for under-hood and chassis-mounted automotive electronics. Its DO-204AL package meets JESD201 Class 1A whisker resistance requirements, and its bi-directional clamping supports CAN, LIN, and sensor signal protection in vehicles - all confirmed in the official Vishay BZW04P31-E3/73 datasheet.
How does the bi-directional nature of BZW04P31-E3/73 affect its PCB layout?
The bi-directional design of BZW04P31-E3/73 eliminates polarity constraints: either lead may connect to line or ground, simplifying layout and reducing assembly errors. No cathode band marking is present, and symmetric VBR ensures identical clamping in both directions - critical for protecting AC-coupled or floating differential buses like RS-485 or CAN where BZW04P31-E3/73 is commonly deployed.
What is the maximum reverse leakage current for BZW04P31-E3/73 at its stand-off voltage?
The maximum reverse leakage current (ID) for BZW04P31-E3/73 is 1000 μA at its 30.8 V stand-off voltage (VWM), measured at 25 °C. This low leakage ensures minimal power loss and signal distortion in always-on protection configurations, such as those used in battery-backed sensor nodes or low-power IoT gateways where BZW04P31-E3/73 provides persistent surge immunity.
Can BZW04P31-E3/73 replace older P6KE-series TVS diodes in existing designs?
BZW04P31-E3/73 is not a direct drop-in replacement for P6KE33CA due to differences in package (DO-41 vs. DO-15), thermal profile, and qualification status. While both offer similar VWM and VC, BZW04P31-E3/73 provides AEC-Q101 qualification and tighter VBR tolerance - but requires mechanical rework. Migration should be validated per application stress conditions and layout constraints specific to the BZW04P31-E3/73 implementation.
BZW04P31-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
BZW04P31-E3/73 FAQ
1.How can I place an order for BZW04P31-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P31-E3/73 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 BZW04P31-E3/73 reliable?
The price and inventory of BZW04P31-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P31-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P31-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P31-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P31-E3/73?
BZW04P31-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P31-E3/73 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 BZW04P31-E3/73?
For technical support, including BZW04P31-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P31-E3/73 requirements.
6.How does Aetrix verify that BZW04P31-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P31-E3/73 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 BZW04P31-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P31-E3/73?
All BZW04P31-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P31-E3/73, 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 BZW04P31-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P31-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P31-E3/73 Tags
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