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Vishay General Semiconductor - Diodes Division BZW04P40B-E3/73
- Part No.:
- BZW04P40B-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P40B-E3/73.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,036
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Product details
Overview
BZW04P40B-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 40.2 V stand-off voltage (VWM), 44.7–51.7 V breakdown range (VBR at 1 mA), 64.8 V clamping voltage (VC) at 6.2 A peak pulse current, 400 W peak pulse power (10/1000 µs), and operates across –55 °C to +175 °C junction temperature - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the BZW04P40B-E3/73 datasheet, BZW04P40B-E3/73 pinout, BZW04P40B-E3/73 application, or BZW04P40B-E3/73 equivalent, this page delivers verified electrical parameters, DO-204AL (DO-41) package details, bi-directional clamping behavior, AEC-Q101 qualification status, and real-world use cases in ESD- and surge-prone analog/sensor circuits.
Technical Context
The BZW04P40B-E3/73 implements a glass-passivated PN-junction structure optimized for fast response (<1 ns) to transients and low incremental surge resistance. Its bi-directional configuration enables symmetric clamping in AC-coupled or floating signal paths without polarity constraints.
It complies with ANSI/IEEE C62.35 surge standards, supports repetitive 0.01% duty-cycle pulses, and maintains stable VBR temperature coefficient of 0.101 %/°C - critical for high-temperature automotive environments where thermal drift must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40.2 V - maximum continuous reverse operating voltage before conduction begins; defines safe working margin below clamping threshold |
| VBR (min/max) | 44.7 V / 51.7 V at 1 mA - guaranteed breakdown onset range; ensures reliable triggering across process and temperature variation |
| VC @ IPPM | 64.8 V at 6.2 A - clamped voltage during 10/1000 µs surge; limits downstream IC stress to survivable levels |
| PPPM | 400 W - peak pulse power handling capability; sustains standardized lightning/surge events per IEC 61000-4-5 |
| Junction Temp | –55 °C to +175 °C - extended thermal range enabling under-hood automotive and industrial control cabinet deployment |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, temperature cycling, and ESD robustness |
| Package | DO-204AL (DO-41) - industry-standard axial leaded package with UL 94 V-0 epoxy molding and matte tin-plated leads |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, cylindrical glass-passivated body with matte tin-plated leads compliant to J-STD-002 and JESD22-B102. Bi-directional construction means no polarity marking; both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in either direction above VBR; no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable leakage performance and long-term reliability under humidity and thermal stress |
| 400 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 3 surges (1 kV line-to-ground) without degradation |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes let-through energy to protected circuitry compared to higher-ratio TVS devices |
| RoHS-compliant, whisker-tested (JESD201 Class 1A) | Ensures solder joint integrity and compliance with environmental and reliability mandates |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensors from load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across differential signal pairs or supply rails upstream of interface ICs. Use Value: Limits induced surge voltages to ≤64.8 V, preventing latch-up or gate oxide damage in 5 V/3.3 V sensor front-ends. |
Use Scenario: Safeguarding 4–20 mA current loop receivers and 0–10 V analog inputs in factory automation systems exposed to relay switching noise. IC Role / Device Role / Timing Role: Standoff protector on field-side input terminals, absorbing inductive kickback from solenoids and contactors. Use Value: Maintains signal integrity by clamping transients within 1 ns while drawing <1 µA leakage at 40.2 V DC operating point. |
| Telecom Line Interface | Consumer Power Adapter ESD Guard |
Use Scenario: Secondary-side surge suppression on Ethernet PHY magnetics or DSL line drivers subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bi-directional shunt device across transformer secondary windings or data line pairs. Use Value: Provides 400 W pulse handling without derating up to +125 °C ambient, matching telecom equipment thermal profiles. |
Use Scenario: Input-stage ESD protection on USB-C or barrel jack inputs of smart home adapters vulnerable to human-body-model discharges. IC Role / Device Role / Timing Role: First-line defense against ±8 kV contact / ±15 kV air-gap ESD per IEC 61000-4-2. Use Value: Achieves sub-1 ns response with <1 µA leakage at 40.2 V, preserving no-load efficiency and standby power budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA | Same DO-214AA package; lower 400 W rating but tighter VC = 64.5 V @ 6.2 A; slightly higher leakage (5 µA vs. 1 µA) | Preferred for space-constrained PCBs; less suitable for high-temp automotive due to SMBJ's 150 °C TJ max | Select when board area is limited and thermal environment stays below 125 °C ambient. |
| 1.5KE40CA | Higher 1500 W rating but larger DO-201AD package; VC = 64.3 V @ 23.3 A; slower response (~5 ns) and higher capacitance | Better for high-energy surges (e.g., AC mains); unsuitable for high-speed signal lines due to 100+ pF junction capacitance | Choose only for primary-side AC/DC input protection where speed and capacitance are non-critical. |
Compared with SMBJ40CA and 1.5KE40CA, the BZW04P40B-E3/73 offers superior high-temperature operation (175 °C), lower leakage (≤1 µA), and AEC-Q101 qualification - making it the preferred choice for automotive and industrial embedded sensor nodes requiring long-term reliability under thermal stress.
Availability
BZW04P40B-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, and telecom line protection requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for BZW04P40B-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The BZW04P series is part of Vishay's TransZorb® TVS platform engineered specifically for high-energy, high-temperature transient suppression in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the clamping voltage of the BZW04P40B-E3/73 under a standard 10/1000 µs surge?
The BZW04P40B-E3/73 has a maximum clamping voltage (VC) of 64.8 V at 6.2 A peak pulse current (IPPM) under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees consistent overvoltage limiting for downstream ICs. The BZW04P40B-E3/73 achieves this with low incremental surge resistance, ensuring minimal voltage overshoot during fast transients.
Is the BZW04P40B-E3/73 suitable for automotive applications?
Yes - the BZW04P40B-E3/73 is AEC-Q101 qualified and rated for junction temperatures up to +175 °C, making it suitable for under-hood and chassis-mounted automotive systems. Its bi-directional architecture protects bidirectional buses like LIN and sensor outputs, and its low leakage (<1 µA at 40.2 V) preserves battery life in always-on modules. The BZW04P40B-E3/73 meets requirements for engine control units, ADAS camera interfaces, and body electronics.
How does the BZW04P40B-E3/73 differ from uni-directional variants like BZW04P40-E3/73?
The BZW04P40B-E3/73 is bi-directional, meaning it clamps symmetrically in both polarities with no cathode marking, whereas the uni-directional BZW04P40-E3/73 has a cathode band and conducts only in reverse bias. The BZW04P40B-E3/73 exhibits identical VWM, VBR, and VC in both directions - essential for protecting AC-coupled signals or floating grounds. Uni-directional versions require correct polarity placement and cannot protect against positive-going transients on anode-connected lines.
What is the maximum reverse leakage current of the BZW04P40B-E3/73 at its stand-off voltage?
The BZW04P40B-E3/73 specifies a maximum reverse leakage current (ID) of 1.0 µA at its 40.2 V stand-off voltage (VWM) and 25 °C ambient. This ultra-low leakage ensures minimal power loss in battery-powered or high-impedance sensing circuits. At elevated temperatures (e.g., 125 °C), leakage remains well below 10 µA - a key advantage over many competing TVS diodes in thermally demanding applications.
Does the BZW04P40B-E3/73 have RoHS and REACH compliance documentation?
Yes - the BZW04P40B-E3/73 carries the "E3" suffix, indicating full compliance with RoHS Directive 2011/65/EU and alignment with WEEE 2002/96/EC. Vishay certifies that all E3-suffix parts meet material restrictions including lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE. Full declarations and test reports for the BZW04P40B-E3/73 are available through Vishay's Material Category Policy portal and authorized distributor portals.
BZW04P40B-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- 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)
BZW04P40B-E3/73 FAQ
1.How can I place an order for BZW04P40B-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P40B-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 BZW04P40B-E3/73 reliable?
The price and inventory of BZW04P40B-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 BZW04P40B-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P40B-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P40B-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P40B-E3/73?
BZW04P40B-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P40B-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 BZW04P40B-E3/73?
For technical support, including BZW04P40B-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P40B-E3/73 requirements.
6.How does Aetrix verify that BZW04P40B-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P40B-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 BZW04P40B-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P40B-E3/73?
All BZW04P40B-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P40B-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 BZW04P40B-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P40B-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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