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Vishay General Semiconductor - Diodes Division BZW04P31HE3/73
- Part No.:
- BZW04P31HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P31HE3/73.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,077
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Product details
Overview
BZW04P31HE3/73 from Vishay General Semiconductor is a bi-directional TransZorb® transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal 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) with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the BZW04P31HE3/73 datasheet, BZW04P31HE3/73 pinout, BZW04P31HE3/73 application, or BZW04P31HE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, DO-204AL (DO-41) package, bi-directional symmetry, low clamping ratio (VC/VWM ≈ 1.62), and 0.099 %/°C breakdown voltage temperature coefficient - critical for stable protection across automotive temperature ranges.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, enabling single-device protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage performance and fast response (<1 ns), while the 10/1000 μs surge rating reflects standardized lightning and inductive-switching transient immunity per ANSI/IEEE C62.35.
The device is rated for 175 °C maximum junction temperature and derates linearly above 25 °C ambient, supporting operation in under-hood automotive environments. Its 1.5 W steady-state power dissipation (PD) and 1000 nA max reverse leakage at VWM allow integration into low-power monitoring circuits without bias network interference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - Maximum continuous working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VC @ IPPM | 49.9 V at 8.0 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to sub-50 V during transients. |
| PPPM | 400 W - Peak pulse power handling capability; meets IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity requirements. |
| TJ max. | 175 °C - Enables reliable operation in high-temperature automotive and industrial enclosures without thermal shutdown. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test standard, including HTOL, temperature cycling, and ESD. |
| Package | DO-204AL (DO-41) - Through-hole package with 0.205" body diameter; compatible with legacy wave-solder and manual assembly. |
| RoHS / Whisker | RoHS-compliant HE3 suffix; meets JESD201 Class 2 whisker resistance - suitable for long-life industrial deployments. |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, molded epoxy case with matte tin-plated leads. Bi-directional construction means no cathode marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both ends) | Bi-directional surge path | Identical terminal behavior in either polarity; enables single-component protection of AC or floating nodes without orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable leakage current (<1 μA at VWM) and long-term reliability under humidity and thermal cycling stress. |
| 400 W 10/1000 μs rating | Supports repeated surge events in industrial motor drives and automotive power distribution without degradation. |
| AEC-Q101 qualification | Validates suitability for automotive body control modules, ADAS sensor interfaces, and infotainment power rails. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces downstream. |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for safety-critical industrial and transportation equipment compliance. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between signal line and ground, responding within <1 ns to transients. Use Value: Maintains signal integrity by limiting voltage excursions to ≤49.9 V during 8 A surges - preserving transceiver functionality and reducing system-level reset events. |
Use Scenario: Shielding digital input channels on programmable logic controllers from inductive kickback caused by relay/solenoid switching. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input lines, absorbing repetitive 400 W pulses without degradation. Use Value: Eliminates need for external series impedance or RC snubbers - simplifies board layout and improves mean time between failures (MTBF). |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY front-ends and DSL line drivers against lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Primary surge suppression element on differential pair lines, operating identically in both directions. Use Value: Achieves IEC 61000-4-5 compliance with single-device solution - reduces BOM count and PCB area vs. bidirectional TVS arrays. |
Use Scenario: Input-stage overvoltage protection in wall-mounted AC-DC adapters for smart home devices. IC Role / Device Role / Timing Role: Clamp component across bulk capacitor input, triggered by line surges exceeding 30.8 V. Use Value: Prevents catastrophic failure of primary-side MOSFETs and controller ICs during mains-borne transients - extends product warranty life. |
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 rating but lower surge current density. | Surface-mount alternative requiring PCB rework; better suited for space-constrained consumer designs. | Select SMBJ33CA when automated SMT assembly and smaller footprint are prioritized over through-hole serviceability. |
| P6KE33CA | DO-15 package; 33 V VWM; 53.3 V VC @ 7.5 A; 600 W PPPM rating but larger thermal mass and slower response due to higher junction capacitance. | Higher-power legacy replacement with less stringent AEC-Q101 coverage; used in non-automotive industrial power supplies. | Choose P6KE33CA only if existing DO-15 footprint reuse is mandatory and AEC-Q101 is not required. |
Compared with BZW04P31HE3/73, SMBJ33CA offers SMT compatibility at the cost of reduced thermal robustness in high-reliability environments, while P6KE33CA provides higher peak power but lacks automotive qualification and exhibits slower clamping - making BZW04P31HE3/73 the optimal balance of AEC-Q101 compliance, bi-directional precision, and DO-41 serviceability.
Availability
BZW04P31HE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply across extended temperature and lifecycle demands.
Supply support for BZW04P31HE3/73 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The BZW04P31HE3/73 belongs to Vishay's TransZorb® family of TVS diodes, engineered specifically for fast, repeatable transient suppression in harsh electromagnetic environments - with emphasis on AEC-Q101 validation and stable parametric performance over temperature.
FAQ
What is the clamping voltage of the BZW04P31HE3/73 under a standard 10/1000 μs surge?
The BZW04P31HE3/73 clamps to a maximum of 49.9 V when subjected to an 8.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper voltage limit imposed on protected circuitry during transient events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.
Is the BZW04P31HE3/73 suitable for automotive applications?
Yes, the BZW04P31HE3/73 is AEC-Q101 qualified and explicitly rated for operation from –55 °C to +175 °C junction temperature. Its DO-204AL package, glass-passivated junction, and validated surge performance make it appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability under thermal and electrical stress is mandatory.
How does the bi-directional nature of the BZW04P31HE3/73 affect its placement in circuit design?
The BZW04P31HE3/73 has no polarity marking and behaves identically in both directions, allowing placement between any two nodes - such as across a differential signal pair or between a signal line and ground - without orientation constraints. This eliminates risk of incorrect installation and simplifies layout for AC-coupled or floating systems.
What is the maximum reverse leakage current specified for the BZW04P31HE3/73 at its stand-off voltage?
At its 30.8 V stand-off voltage (VWM) and 25 °C ambient, the BZW04P31HE3/73 exhibits a maximum reverse leakage current (ID) of 1.0 μA. This low leakage ensures minimal power loss in always-on monitoring circuits and avoids false triggering in high-impedance sensor bias networks.
Does the BZW04P31HE3/73 require heatsinking for continuous operation?
No additional heatsinking is required for the BZW04P31HE3/73 under normal conditions: its 1.5 W steady-state power dissipation (PD) rating assumes operation on an infinite heatsink at lead temperature (TL) of 75 °C. In typical through-hole PCB layouts with 0.375" lead length, derating curves confirm safe operation up to 75 °C ambient without auxiliary cooling.
BZW04P31HE3/73 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04P31HE3/73 FAQ
1.How can I place an order for BZW04P31HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P31HE3/73 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 BZW04P31HE3/73 reliable?
The price and inventory of BZW04P31HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P31HE3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P31HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P31HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P31HE3/73?
BZW04P31HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P31HE3/73 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 BZW04P31HE3/73?
For technical support, including BZW04P31HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P31HE3/73 requirements.
6.How does Aetrix verify that BZW04P31HE3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P31HE3/73 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 BZW04P31HE3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P31HE3/73?
All BZW04P31HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P31HE3/73, 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 BZW04P31HE3/73 part is unused and in its original packaging.
Return procedure for BZW04P31HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P31HE3/73 Tags
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