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Vishay General Semiconductor - Diodes Division BZW04-85BHE3/54
- Part No.:
- BZW04-85BHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-85BHE3/54.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,971
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Product details
Overview
BZW04-85BHE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on signal or power lines. It features 85.5 V standoff voltage (VWM), 95.0–105 V breakdown voltage (VBR) at 1 mA test current, and 137 V maximum clamping voltage (VC) at 2.9 A peak pulse current (IPPM), with 400 W peak pulse power rating under 10/1000 μs waveform.
For engineers reviewing the BZW04-85BHE3/54 datasheet, BZW04-85BHE3/54 pinout, BZW04-85BHE3/54 application, or BZW04-85BHE3/54 equivalent, this device serves as an AEC-Q101-qualified, RoHS-compliant protection component for automotive sensor interfaces, industrial I/O lines, and telecom power rails where bidirectional surge immunity and low leakage (<1 μA at VWM) are required.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating circuits without polarity concerns, and it operates across -55 °C to +175 °C junction temperature range.
The device delivers 400 W peak pulse power handling per 10/1000 μs waveform at TA = 25 °C, derating linearly above 25 °C per Fig. 2, and supports repetitive surge events at ≤0.01% duty cycle. It meets JESD22-B102 solderability and JESD201 class 2 whisker resistance requirements due to its matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 72–96 V nominal systems. |
| VBR (min/max) | 95.0 V / 105 V at IT = 1 mA - Confirmed breakdown threshold ensures reliable triggering within ±5.5% tolerance band. |
| VC @ IPPM | 137 V at IPPM = 2.9 A - Clamping voltage limits downstream voltage stress during transient events; <52 V overshoot above VWM. |
| PPPM | 400 W - Peak pulse power capability under standard 10/1000 μs waveform; sufficient for IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | +175 °C - Enables use in under-hood automotive environments and thermally constrained industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC specification. |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with axial leads; no polarity marking for bidirectional operation; lead finish: matte tin, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional clamping node | Either lead functions identically as input/output terminal; no cathode band; installed inline without orientation constraint. |
| Case | Passivated silicon die enclosure | Molded UL 94 V-0 epoxy provides mechanical protection and electrical isolation; no thermal pad or mounting interface. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR over lifetime and improved moisture resistance vs. epoxy-only passivation. |
| 400 W peak pulse power (10/1000 μs) | Supports repeated surge events in industrial motor drives and automotive alternator load dump scenarios. |
| AEC-Q101 qualification | Validates suitability for automotive body electronics, ADAS sensor interfaces, and infotainment power rails. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during transients, reducing risk of damage to downstream MOSFETs or microcontrollers. |
| JESD201 class 2 whisker resistance | Ensures long-term solder joint reliability in high-reliability applications without tin whisker growth risk. |
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 ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal fidelity under 100 V/100 ms load dump events while adding <0.5 pF capacitance to preserve rise time integrity. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Primary overvoltage suppression element across input terminals, coordinated with series impedance for energy absorption. Use Value: Limits transient voltage to <140 V during 40 A/10 ms surges, preventing latch-up in optocoupler input stages. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Guarding 48 V PoE-powered Ethernet switch ports and base station RF front-end supplies against lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after primary GDT or MOV, providing precise clamping near IC absolute maximum ratings. Use Value: Achieves sub-140 V clamping at 2.9 A, enabling use with 100 V-rated DC-DC converters and protecting sensitive PHY ICs. |
Use Scenario: Suppressing commutation spikes on BLDC motor driver half-bridges in smart home appliances (e.g., washing machines, HVAC fans). IC Role / Device Role / Timing Role: Parallel-connected TVS across low-side MOSFET drain-source to clamp inductive flyback voltage. Use Value: Withstands 400 W pulses without degradation, ensuring >100,000-cycle reliability under continuous PWM switching stress. |
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) and PPPM (600 W), but SMB package (surface-mount); higher IPPM (6.5 A) and VC (137 V); lower TJ max. (+150 °C). | Requires PCB rework for SMT layout; better suited for space-constrained consumer designs than through-hole industrial boards. | Select SMBJ85CA when board area is limited and automated assembly is preferred; verify thermal relief pad design for 1.5 W steady-state dissipation. |
| P6KE85CA | Same DO-41 package and bidirectional function, but lower PPPM (600 W), higher VC (139 V), and wider VBR tolerance (94–116 V); not AEC-Q101 qualified. | Lacks automotive qualification; suitable for commercial/industrial grade only; higher clamping uncertainty affects precision-sensitive circuits. | Choose P6KE85CA for cost-sensitive non-automotive applications where AEC-Q101 is unnecessary and ±10% VBR variation is acceptable. |
Compared with SMBJ85CA and P6KE85CA, the BZW04-85BHE3/54 offers AEC-Q101 qualification and tighter VBR tolerance (±5.5%) in a proven through-hole package, making it optimal for automotive and high-reliability industrial deployments where qualification traceability and mechanical robustness are mandatory.
Availability
BZW04-85BHE3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O modules, and telecom power rail safeguarding requiring stable component supply across multi-year production cycles.
Supply support for BZW04-85BHE3/54 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The BZW04 series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and 175 °C operation are critical.
FAQ
What is the clamping voltage of BZW04-85BHE3/54 under maximum rated surge current?
The BZW04-85BHE3/54 has a maximum clamping voltage (VC) of 137 V at 2.9 A peak pulse current (IPPM), measured using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and reflects worst-case voltage seen by protected circuitry during transient events. The BZW04-85BHE3/54 maintains this clamping performance with minimal derating up to +125 °C junction temperature.
Is BZW04-85BHE3/54 suitable for automotive applications?
Yes, BZW04-85BHE3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes JESD201 class 2 whisker-resistant matte tin leads, glass-passivated junction, and operation up to +175 °C junction temperature-meeting requirements for engine control units, body electronics, and ADAS sensor interfaces. The BZW04-85BHE3/54 appears in Vishay's automotive-grade product list with full qualification documentation.
How does the bidirectional configuration of BZW04-85BHE3/54 affect circuit placement?
The BZW04-85BHE3/54 has no polarity marking and functions identically in either orientation, allowing direct in-line placement across ungrounded or AC-coupled signal paths without concern for anode/cathode direction. This simplifies layout in differential buses (e.g., RS-485), transformer-isolated supplies, or floating sensor outputs where voltage transients may swing positive or negative relative to local ground. The BZW04-85BHE3/54 eliminates need for dual-unidirectional devices or orientation verification during assembly.
What is the maximum steady-state power dissipation for BZW04-85BHE3/54?
The BZW04-85BHE3/54 has a maximum steady-state power dissipation (PD) of 1.5 W when mounted on an infinite heatsink at lead temperature TL = 75 °C. Under typical PCB conditions without heatsinking, derating applies per Fig. 5 in the datasheet; at TA = 70 °C, usable PD drops to approximately 0.9 W. This rating governs continuous leakage-based heating-not transient surge handling-and must be verified against actual board thermal performance. The BZW04-85BHE3/54 is not intended for sustained forward conduction.
Does BZW04-85BHE3/54 require external series impedance for effective protection?
Yes, the BZW04-85BHE3/54 must be used with appropriate series impedance (e.g., resistor, ferrite bead, or trace inductance) to limit peak current during transients and ensure energy remains within its 400 W PPPM rating. Without current limiting, fast-rising surges may exceed the device's safe operating area. Typical designs place the BZW04-85BHE3/54 directly at the protected node, with series impedance upstream to shape the surge waveform. Coordination between BZW04-85BHE3/54 and upstream components is essential for system-level IEC 61000-4-5 compliance.
BZW04-85BHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
BZW04-85BHE3/54 FAQ
1.How can I place an order for BZW04-85BHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-85BHE3/54 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 BZW04-85BHE3/54 reliable?
The price and inventory of BZW04-85BHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-85BHE3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-85BHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-85BHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-85BHE3/54?
BZW04-85BHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-85BHE3/54 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 BZW04-85BHE3/54?
For technical support, including BZW04-85BHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-85BHE3/54 requirements.
6.How does Aetrix verify that BZW04-85BHE3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-85BHE3/54 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 BZW04-85BHE3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-85BHE3/54?
All BZW04-85BHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-85BHE3/54, 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 BZW04-85BHE3/54 part is unused and in its original packaging.
Return procedure for BZW04-85BHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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