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Vishay General Semiconductor - Diodes Division BZW04P85HE3/73
- Part No.:
- BZW04P85HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P85HE3/73.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,973
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Product details
Overview
BZW04P85HE3/73 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 in automotive sensor interfaces, industrial I/O modules, and telecom line cards.
For engineers reviewing the BZW04P85HE3/73 datasheet, BZW04P85HE3/73 pinout, BZW04P85HE3/73 application, or BZW04P85HE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, DO-41 package compatibility, bi-directional surge handling up to ±137 V, and low leakage (<1 μA at 85.5 V) for low-power system integrity.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding its breakdown threshold (95.0–110 V), it avalanches rapidly to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance across temperature.
Designed for bi-directional operation, BZW04P85HE3/73 exhibits symmetrical clamping in both polarities - critical for AC-coupled or floating signal paths. It complies with ANSI/IEEE C62.35 surge standards and supports repetitive 0.01% duty cycle pulses without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85.5 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 72–85 V nominal systems. |
| VBR min/max | 95.0 V / 110 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage with margin. |
| VC @ IPPM | 137 V at 2.9 A - Clamped voltage during 10/1000 μs surge; limits stress on protected ICs (e.g., RS-485 transceivers, microcontroller GPIO). |
| PPPM | 400 W - Peak pulse power handling per 10/1000 μs waveform; supports common IEC 61000-4-5 Level 3 surges (1 kV/42 Ω). |
| ID @ VWM | <1 μA - Reverse leakage at rated stand-off; preserves battery life and signal integrity in always-on sensor nodes. |
| TJ max | +175 °C - Maximum junction temperature; enables under-hood automotive deployment and high-ambient industrial use. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM ≥8 kV. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case meeting UL 94 V-0. Matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards. HE3 suffix denotes AEC-Q101 qualification and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias | Not used in bi-directional TVS operation; symmetric structure means either lead serves as reference point for clamping. |
| Cathode (unmarked end) | Current exit terminal in forward bias | No polarity marking on bi-directional variants; terminals are functionally interchangeable for transient suppression in AC or floating circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable breakdown voltage and long-term reliability under thermal cycling and humidity exposure. |
| 400 W peak pulse power (10/1000 μs) | Handles IEC 61000-4-5 combination wave surges without failure; suitable for industrial fieldbus and automotive power-line protection. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Bi-directional symmetry | Clamps equally for positive and negative transients - essential for protecting differential buses (e.g., CAN, RS-485) and AC signal paths. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes let-through voltage during surges, reducing risk of latch-up or damage to 3.3 V/5 V logic and analog front-ends. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting ABS wheel speed sensor outputs from load-dump and inductive switching transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across sensor output and ground, clamping spikes before they reach the MCU ADC input. Use Value: Prevents false triggering and ADC saturation during cranking events, maintaining functional safety compliance (ISO 26262 ASIL-B). |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor drive noise and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp on differential bus lines (A/B) and common-mode line (GND), limiting common-mode and differential-mode transients. Use Value: Enables >1000 m cable length operation while sustaining >25 kV ESD (IEC 61000-4-2) and 4 kV EFT (IEC 61000-4-4) immunity. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Control |
|
Use Scenario: Front-end protection for DSL/ADSL line interface units subjected to longitudinal surges from outdoor copper pairs. IC Role / Device Role / Timing Role: Primary shunt protector on tip/ring lines, coordinated with gas discharge tubes (GDTs) for multi-stage clamping. Use Value: Limits let-through voltage to <150 V during 10/700 μs telecom surges, preserving transformer isolation and PHY IC integrity. |
Use Scenario: Overvoltage protection for microcontroller GPIOs driving brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Localized TVS across motor driver FET source/drain and MCU output pins to absorb flyback energy from inductive kickback. Use Value: Eliminates need for external snubbers; reduces PCB area and component count while meeting IEC 61000-4-5 Level 2 (0.5 kV) requirements. |
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 | DO-214AA package (SMB), 85 V VWM, 137 V VC @ 2.9 A, same PPPM but higher thermal resistance (RθJA = 110 °C/W vs. DO-41's ~150 °C/W). | Surface-mount alternative for space-constrained designs; less suited for through-hole legacy boards or high-vibration environments. | Select SMBJ85CA when board real estate is limited and reflow assembly is available; verify mechanical retention for shock-prone applications. |
| P6KE85CA | DO-15 package, 85 V VWM, 137 V VC @ 2.9 A, identical electrical specs but lower AEC-Q101 qualification coverage (not explicitly listed in latest Vishay AEC-Q101 report). | Cost-optimized replacement for non-automotive industrial use; lacks documented automotive qualification evidence. | Choose P6KE85CA for commercial-grade applications where AEC-Q101 is not mandated; confirm lifecycle availability separately. |
Compared with BZW04P85HE3/73, SMBJ85CA offers SMT compatibility at the expense of mechanical ruggedness and thermal derating margin, while P6KE85CA provides identical protection performance without formal AEC-Q101 validation - making BZW04P85HE3/73 the preferred choice for automotive and high-reliability industrial deployments.
Availability
BZW04P85HE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line card surge protection requiring stable component supply and long-term manufacturability.
Supply support for BZW04P85HE3/73 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 and application-specific performance.
The BZW04P series belongs to Vishay's TransZorb® TVS family, engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the exact breakdown voltage range for BZW04P85HE3/73?
The BZW04P85HE3/73 has a minimum breakdown voltage (VBR) of 95.0 V and a maximum of 110 V, measured at 1 mA test current. This range ensures consistent avalanche initiation above its 85.5 V stand-off voltage while accommodating process variation - critical for predictable clamping behavior in safety-critical systems.
Is BZW04P85HE3/73 suitable for automotive applications?
Yes, BZW04P85HE3/73 is AEC-Q101 qualified and specifically tested for automotive environments, including temperature cycling, high-temperature operating life, and ESD robustness. Its DO-41 package and 175 °C max junction temperature make it appropriate for under-hood and body-control module deployments.
How does the bi-directional design of BZW04P85HE3/73 affect its usage in circuit protection?
The bi-directional architecture of BZW04P85HE3/73 allows symmetrical clamping for both positive and negative transients without polarity concerns. This eliminates orientation errors during assembly and simplifies protection of AC-coupled, differential, or floating signal paths - such as CAN bus lines or audio inputs - where voltage swings occur in both directions.
What is the maximum clamping voltage of BZW04P85HE3/73 during a surge event?
The BZW04P85HE3/73 clamps to a maximum of 137 V when subjected to its rated peak pulse current of 2.9 A (10/1000 μs waveform). This clamping voltage directly determines the peak stress imposed on downstream components, enabling designers to verify margin against IC absolute maximum ratings.
Does BZW04P85HE3/73 require a heatsink for standard operation?
No, BZW04P85HE3/73 does not require an external heatsink under normal transient conditions. Its 1.5 W steady-state power dissipation rating and DO-41 package are designed for natural convection cooling; heatsinking is only relevant for sustained high-duty-cycle surges beyond datasheet limits.
BZW04P85HE3/73 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:
- -
- 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)
BZW04P85HE3/73 FAQ
1.How can I place an order for BZW04P85HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P85HE3/73 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 BZW04P85HE3/73 reliable?
The price and inventory of BZW04P85HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P85HE3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P85HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P85HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P85HE3/73?
BZW04P85HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P85HE3/73 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 BZW04P85HE3/73?
For technical support, including BZW04P85HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P85HE3/73 requirements.
6.How does Aetrix verify that BZW04P85HE3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P85HE3/73 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 BZW04P85HE3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P85HE3/73?
All BZW04P85HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P85HE3/73, 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 BZW04P85HE3/73 part is unused and in its original packaging.
Return procedure for BZW04P85HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P85HE3/73 Tags
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