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Vishay General Semiconductor - Diodes Division BZW04P85-E3/73
- Part No.:
- BZW04P85-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P85-E3/73.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO204AL
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BZW04P85-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 85.5 V stand-off voltage (VWM), 137 V maximum clamping voltage (VC) at 2.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in industrial and automotive control systems.
For engineers reviewing the BZW04P85-E3/73 datasheet, BZW04P85-E3/73 pinout, BZW04P85-E3/73 application, or BZW04P85-E3/73 equivalent, key selection criteria include its DO-204AL (DO-41) axial package, bi-directional symmetry, AEC-Q101 qualification, low leakage (<1 µA at VWM), and temperature coefficient of breakdown voltage (0.106 %/°C).
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping performance under repetitive 10/1000 µs transients at 0.01% duty cycle.
The device is rated for 175 °C maximum junction temperature and derates linearly above 25 °C ambient per Fig. 2; it supports soldering up to 275 °C for 10 s (JESD22-B106) and meets JESD201 Class 1A whisker resistance (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85.5 V - Maximum continuous working voltage before clamping begins; defines safe operating margin for 72–85 V nominal DC bus or signal lines. |
| VC @ IPPM | 137 V - Clamped voltage at 2.9 A peak pulse current; limits downstream voltage stress during 10/1000 µs transients. |
| PPPM | 400 W - Peak pulse power handling capability; sustains standardized lightning/surge immunity per IEC 61000-4-5. |
| IPPM | 2.9 A - Peak pulse current supported at VC; correlates to transient energy absorption of ~0.29 J (10/1000 µs). |
| TJ max. | 175 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Leakage @ VWM | <1 µA - Ultra-low reverse leakage ensures minimal power loss and signal integrity in high-impedance monitoring circuits. |
| Temp. Coeff. VBR | 0.106 %/°C - Predictable drift of breakdown voltage with temperature; critical for precision clamping across -55 to +175 °C range. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards. No polarity marking - bi-directional symmetry confirmed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional transient conduction path | No functional distinction between leads; either terminal serves as input/output for bidirectional surge suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Identical VBR, VC, and IPPM in both polarities - eliminates need for orientation-aware PCB layout in AC-coupled or floating lines. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for engine control, body electronics, and ADAS sensors. |
| Glass passivated junction | Enables sub-nanosecond response and stable long-term parametric performance under repeated surge stress without degradation. |
| RoHS-compliant E3 suffix | Meets JESD201 Class 1A whisker resistance and Directive 2011/65/EU - certified for commercial and automotive production use. |
| 400 W 10/1000 µs rating | Supports Level 4 IEC 61000-4-5 surge immunity (4 kV line-to-earth) when properly coordinated with upstream impedance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load-dump and jump-start transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic by clamping spikes to ≤137 V while maintaining <1 µA leakage at 85.5 V nominal. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC modules exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transient energy away from precision op-amp inputs and ADC front-ends. Use Value: Enables reliable 16-bit measurement accuracy by suppressing >1 kV transients without signal distortion or DC offset shift. |
| Telecom Line Surge Suppression | Consumer Appliance Motor Control |
Use Scenario: Secondary-level protection on DSL/VDSL line cards where primary GDTs handle bulk energy and BZW04P85-E3/73 refines clamping. IC Role / Device Role / Timing Role: Fast-response secondary clamp coordinating with upstream protection to achieve <100 ns total response and controlled let-through voltage. Use Value: Reduces residual surge voltage to levels compatible with 100 V-rated Ethernet PHYs and line drivers without adding series impedance. |
Use Scenario: Suppressing commutation spikes from universal motor brushes in washing machines and HVAC blowers connected to MCU-based speed controllers. IC Role / Device Role / Timing Role: Axial DO-41 device mounted near motor terminals to absorb inductive kickback before it couples into control logic. Use Value: Extends MCU lifetime by limiting voltage overshoot to 137 V despite 200+ V flyback events, validated per AEC-Q101 temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | Same VWM (85 V), but SMC package (surface-mount); 600 W PPPM, higher IPPM (33.3 A), larger footprint. | Preferred for automated assembly and higher-power board-level protection; not axial-replaceable. | Select SMBJ85CA when space allows SMC footprint and higher surge margin is required; BZW04P85-E3/73 remains optimal for through-hole legacy designs and service replacement. |
| P6KE85CA | Same DO-15 package and bi-directionality; lower PPPM (600 W), but higher VC (139 V), same VWM (85 V), larger body size. | Legacy industrial design compatibility; slightly higher clamping increases stress on downstream devices. | Choose P6KE85CA only if existing PCB silkscreen and hole pattern match DO-15; BZW04P85-E3/73 offers tighter VC tolerance and AEC-Q101 qualification. |
Compared with SMBJ85CA and P6KE85CA, BZW04P85-E3/73 delivers superior thermal stability (175 °C TJ max), AEC-Q101 validation, and lower clamping voltage - making it the preferred choice for new automotive and high-reliability industrial designs requiring axial mounting.
Availability
BZW04P85-E3/73 is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface protection, telecom line surge suppression, and consumer appliance motor control requiring stable component supply and long-term lifecycle support.
Supply support for BZW04P85-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, efficiency, and application-specific optimization.
The BZW04P series belongs to Vishay's TransZorb® TVS family engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of BZW04P85-E3/73 under standard test conditions?
The BZW04P85-E3/73 has a maximum clamping voltage (VC) of 137 V when subjected to its rated peak pulse current of 2.9 A using the 10/1000 µs waveform. This value is measured per IEC 61000-4-5 and ensures predictable overvoltage limiting for downstream components such as MCUs and transceivers. The BZW04P85-E3/73 maintains this clamping performance across its full operating temperature range.
Is BZW04P85-E3/73 suitable for automotive applications?
Yes, BZW04P85-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 175 °C maximum junction temperature, glass-passivated junction, and robust surge endurance make it appropriate for protecting LIN/CAN node power rails, sensor interfaces, and body control modules. The E3/73 suffix confirms RoHS compliance and JESD201 Class 1A whisker resistance required for automotive production.
Does BZW04P85-E3/73 have polarity markings on the package?
No, BZW04P85-E3/73 is a bi-directional TVS diode and carries no polarity marking on its DO-204AL (DO-41) package. Both leads are functionally identical, enabling installation without orientation concern - a key advantage for protecting AC-coupled lines, differential buses, or floating grounds where polarity reversal may occur.
What is the standoff voltage (VWM) of BZW04P85-E3/73, and how does it relate to system design?
The standoff voltage (VWM) of BZW04P85-E3/73 is 85.5 V - the maximum continuous DC or RMS voltage the device can withstand without entering conduction. In system design, VWM must exceed the normal operating voltage (e.g., 72 V nominal battery systems) by ≥10% to avoid leakage-induced power loss or false triggering, while remaining well below the protected IC's absolute maximum rating.
How does the temperature coefficient of BZW04P85-E3/73 affect its breakdown behavior?
The BZW04P85-E3/73 has a maximum temperature coefficient of breakdown voltage (VBR) of 0.106 %/°C, meaning its breakdown threshold increases predictably with junction temperature. This positive TC ensures stable, non-catastrophic clamping during sustained overvoltage events and prevents thermal runaway - a critical feature for reliability in high-ambient environments like engine compartments or industrial enclosures.
BZW04P85-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):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 2.9A
- 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)
BZW04P85-E3/73 FAQ
1.How can I place an order for BZW04P85-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P85-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 BZW04P85-E3/73 reliable?
The price and inventory of BZW04P85-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 BZW04P85-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P85-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P85-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P85-E3/73?
BZW04P85-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P85-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 BZW04P85-E3/73?
For technical support, including BZW04P85-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P85-E3/73 requirements.
6.How does Aetrix verify that BZW04P85-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P85-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 BZW04P85-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P85-E3/73?
All BZW04P85-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P85-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 BZW04P85-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P85-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P85-E3/73 Tags
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