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Vishay General Semiconductor - Diodes Division BZW04P342B-E3/73
- Part No.:
- BZW04P342B-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P342B-E3/73.pdf
- Description:
- TVS DIODE 342VWM 548VC DO204AL
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BZW04P342B-E3/73 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 342 V standoff voltage (VWM), 548 V clamping voltage (VC) at 0.75 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 cards.
For engineers reviewing the BZW04P342B-E3/73 datasheet, BZW04P342B-E3/73 pinout, BZW04P342B-E3/73 application, or BZW04P342B-E3/73 equivalent, key selection criteria include its DO-204AL (DO-41) package compatibility, AEC-Q101 qualification, bi-directional surge handling up to 342 V, and low leakage (<1 µA at VWM) for high-impedance circuit protection.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 380–440 V (min/max) under 1 mA test current. Its clamping behavior is defined by a low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced transients while maintaining stable junction temperature up to 175 °C.
The device uses a glass-passivated silicon junction and meets UL 94 V-0 flammability rating in its molded epoxy DO-204AL case. It is rated for repetitive 10/1000 µs surges at 0.01% duty cycle and supports soldering per JESD 22-B106 (275 °C, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 342 V - maximum continuous reverse operating voltage before clamping begins; sets protection threshold for 24/48 V DC systems with high-voltage margin. |
| VC @ IPPM | 548 V - clamped voltage at 0.75 A peak pulse current; defines worst-case voltage seen by downstream ICs during surge events. |
| PPPM | 400 W - peak pulse power handling with 10/1000 µs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity testing. |
| VBR (min/max) | 380 V / 440 V - breakdown voltage range at 1 mA; ensures reliable turn-on across temperature and process variation. |
| ID @ VWM | <1 µA - reverse leakage at 342 V; critical for low-power sensor nodes and battery-backed circuits where standby current must be minimized. |
| TJ max. | 175 °C - maximum junction temperature; enables operation in under-hood automotive or industrial enclosures without derating. |
| Package | DO-204AL (DO-41) - axial-leaded through-hole package with matte tin-plated leads; compatible with legacy wave-solder and hand-solder processes. |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, cylindrical epoxy-molded body, 2.0–2.7 mm diameter, 5.2 mm lead length minimum, RoHS-compliant matte tin plating. Bi-directional construction means no polarity marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; bidirectional clamping occurs regardless of voltage polarity - eliminates orientation errors during assembly. |
| Lead 1 | Connection to PCB trace or cable | Direct interface to protected line (e.g., CAN bus, RS-485, DC input); requires minimal trace inductance for optimal clamping speed. |
| Lead 2 | Connection to reference plane (GND or return) | Must connect to low-inductance ground or common return path; performance degrades significantly with long or narrow ground traces. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating differential lines (e.g., RS-485, CAN FD) without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensor hubs, and infotainment power rails. |
| Glass-passivated junction | Ensures stable VBR and low leakage over 15+ years in humid or thermally cycled environments (e.g., industrial gateways). |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed equipment - required for UL 60950-1 and UL 62368-1 certified power supplies and telecom gear. |
| JESD201 Class 1A whisker resistance | E3 suffix confirms compliance with tin whisker mitigation for long-life deployments in aerospace and medical auxiliary systems. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor outputs from load-dump transients and ISO 7637-2 pulse 5a (110 V, 100 ms). IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits voltage to ≤548 V during 100 ms surges, preventing latch-up or gate oxide damage in 3.3 V/5 V signal chain ICs. |
Use Scenario: Safeguarding RS-485 transceivers (e.g., SN65HVD230) on factory-floor communication buses exposed to motor drive noise. IC Role / Device Role / Timing Role: Line-side TVS on A/B differential pair, positioned before ESD protection diodes and common-mode chokes. Use Value: Clamps common-mode surges up to ±342 V without affecting data integrity at 10 Mbps, thanks to sub-1 ns response and low capacitance. |
| Telecom Power Input Stage | Renewable Energy Monitoring |
Use Scenario: Front-end protection of PoE-powered network switches against lightning-induced surges on 48 V DC input rails. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of DC-DC converters and hot-swap controllers. Use Value: Absorbs 400 W pulses without degradation, maintaining <1 µA leakage to avoid quiescent current drift in energy-efficient designs. |
Use Scenario: Voltage clamping for string-monitoring ICs in solar PV combiner boxes subjected to rapid voltage transients during arc-fault events. IC Role / Device Role / Timing Role: Bi-directional clamp across isolated measurement inputs referenced to floating string potential. Use Value: Withstands repeated 342 V stand-off and 548 V clamping without parameter shift, supporting 25-year field lifetime per IEC 61215. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ34CA | Same DO-214AA package; lower PPPM (600 W), higher IPPM (17.4 A), but VC = 55.6 V at 10.3 A - not voltage-scalable to 342 V system level. | Designed for 24–36 V systems; unsuitable for 300+ V DC bus protection due to VWM mismatch. | Select only if protecting lower-voltage rails; BZW04P342B-E3/73 remains necessary for ≥342 V standoff requirements. |
| 1.5KE342CA | Higher PPPM (1500 W), same VWM/VC ratings, but larger DO-201AD package and higher leakage (5 µA) - less suitable for space-constrained or ultra-low-power designs. | Used in high-energy industrial UPS and motor drives; over-spec'd for sensor-level protection where board area and leakage matter. | Choose when surge energy exceeds 400 W; otherwise BZW04P342B-E3/73 offers better fit for compact, low-leakage, AEC-Q101–compliant layouts. |
Compared with SMBJ34CA and 1.5KE342CA, BZW04P342B-E3/73 uniquely balances 342 V standoff, AEC-Q101 qualification, DO-41 footprint, and sub-µA leakage - making it the only direct-fit solution for space-limited, automotive-grade, high-voltage sensor protection.
Availability
BZW04P342B-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom power input stages requiring stable component supply, long-term lifecycle assurance, and AEC-Q101–compliant sourcing.
Supply support for BZW04P342B-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The BZW04P series belongs to Vishay's TransZorb® TVS family, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - prioritizing low clamping ratio, AEC-Q101 validation, and robust package integrity.
FAQ
What is the clamping voltage of BZW04P342B-E3/73 and how does it protect downstream circuitry?
The BZW04P342B-E3/73 has a maximum clamping voltage (VC) of 548 V at 0.75 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected lines during surge events, ensuring that connected ICs - such as microcontrollers or transceivers - experience no more than 548 V, well below their absolute maximum ratings. The low clamping ratio (VC/VWM ≈ 1.6) reflects efficient energy diversion away from sensitive components.
Is BZW04P342B-E3/73 suitable for automotive applications?
Yes, BZW04P342B-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use. Its 175 °C maximum junction temperature, glass-passivated junction, and DO-204AL package with JESD201 Class 1A whisker resistance meet stringent requirements for under-hood and chassis-mounted modules. It is commonly deployed in ADAS sensor hubs, body control units, and battery management system voltage monitoring paths.
How does the bi-directional nature of BZW04P342B-E3/73 affect its placement in a circuit?
Because BZW04P342B-E3/73 is bi-directional, it provides symmetrical clamping for both positive and negative transients - eliminating polarity sensitivity during PCB layout. Unlike uni-directional TVS diodes, it requires no cathode marking or orientation check, reducing assembly errors. It is ideal for protecting AC-coupled, differential, or floating signal lines such as CAN, RS-485, or isolated sensor outputs where voltage polarity reverses.
What is the maximum leakage current of BZW04P342B-E3/73 at its standoff voltage?
The BZW04P342B-E3/73 exhibits a maximum reverse leakage current (ID) of less than 1 µA at its 342 V standoff voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves signal integrity and minimizes power loss in high-impedance or battery-operated circuits - critical for precision analog front-ends and always-on monitoring systems where standby current directly impacts battery life.
Can BZW04P342B-E3/73 be used in parallel for higher surge current handling?
No - BZW04P342B-E3/73 is not recommended for parallel operation due to manufacturing tolerances in breakdown voltage (VBR: 380–440 V). Mismatched VBR causes uneven current sharing, leading to thermal runaway in the lower-VBR unit. For higher IPPM requirements, select a single higher-rated device (e.g., 1.5KE342CA) or implement staged protection with upstream fusing and coordinated impedance matching.
BZW04P342B-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):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 750mA
- 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)
BZW04P342B-E3/73 FAQ
1.How can I place an order for BZW04P342B-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P342B-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 BZW04P342B-E3/73 reliable?
The price and inventory of BZW04P342B-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 BZW04P342B-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P342B-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P342B-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P342B-E3/73?
BZW04P342B-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P342B-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 BZW04P342B-E3/73?
For technical support, including BZW04P342B-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P342B-E3/73 requirements.
6.How does Aetrix verify that BZW04P342B-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P342B-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 BZW04P342B-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P342B-E3/73?
All BZW04P342B-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P342B-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 BZW04P342B-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P342B-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P342B-E3/73 Tags
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