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Vishay General Semiconductor - Diodes Division BZW04-37HE3/54
- Part No.:
- BZW04-37HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-37HE3/54.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,038
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Product details
Overview
BZW04-37HE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on signal and power lines. It features a 36.8 V standoff voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, 59.3 V clamping voltage (VC) at 6.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - suitable for automotive sensor line protection and industrial I/O interface surge suppression.
For engineers reviewing the BZW04-37HE3/54 datasheet, BZW04-37HE3/54 pinout, BZW04-37HE3/54 application, or BZW04-37HE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-41 mechanical data, clamping performance under standardized surge conditions, and direct alternatives for board-level ESD and lightning transient protection design.
Technical Context
This device operates as a bidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its symmetrical V-I characteristic enables identical clamping behavior in both polarities, eliminating polarity marking requirements on PCB layout.
The BZW04-37HE3/54 is rated for 175 °C maximum junction temperature and supports repetitive 10/1000 μs surge events at 0.01% duty cycle. It meets JESD22-B102 solderability standards and JESD201 class 2 whisker resistance, confirming robustness for automotive-grade reflow and long-term reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 36.8 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 40.9–45.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 59.3 V at IPPM = 6.7 A - Measured peak voltage across device during 10/1000 μs surge; protects downstream ICs rated ≤60 V |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability per IEC 61000-4-5 waveform; validates compliance with Level 4 surge immunity |
| ID (Reverse Leakage) | 1.0 μA at VWM - Low standby current minimizes power loss in always-on circuits and preserves battery life |
| TJ max. | 175 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| AEC-Q101 Qualified | Yes - Certified for automotive electronic systems per stress test requirements including HTOL, TCT, and ESD HBM/MM |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with matte tin-plated leads; compliant with UL 94 V-0 flammability rating and RoHS. Bidirectional construction means no cathode marking - terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identically as surge current entry/exit points; no polarity dependency in layout |
| Leads (2x) | PCB interconnect and thermal path | Provide mechanical anchoring and conduct heat to copper pour; compatible with standard through-hole wave soldering |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable VBR tolerance and long-term parameter stability under thermal cycling and humidity exposure |
| 400 W peak pulse power (10/1000 μs) | Validates robustness against IEC 61000-4-5 Combination Wave surges up to 2 kV open-circuit / 1 kA short-circuit |
| AEC-Q101 qualified | Confirms suitability for automotive powertrain, body electronics, and ADAS sensor modules without additional qualification effort |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity for high-speed interfaces |
| DO-41 package with JESD201 class 2 whisker resistance | Ensures solder joint integrity after extended storage and thermal aging in industrial control applications |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: Maintains signal integrity by limiting transient voltage to ≤59.3 V, preventing latch-up or permanent damage to 3.3 V/5 V microcontrollers and ADCs. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges and ground potential differences. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Withstands repeated 1 kV/0.5 kA surges per IEC 61000-4-5, extending maintenance intervals and reducing field failure rates in factory automation systems. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding Ethernet PHY interfaces and DSL line drivers from lightning-induced surges entering via external cabling in telecom access equipment. IC Role / Device Role / Timing Role: First-stage transient suppressor ahead of gas discharge tube (GDT) or secondary TVS array in multi-stage protection architecture. Use Value: Fast response (<1 ns) initiates clamping before GDT fires, reducing let-through energy and preserving signal integrity on 100BASE-TX links. |
Use Scenario: Suppressing commutation spikes from brushed DC motors and relay coils in white goods (e.g., washing machine control boards, HVAC fan controllers). IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or relay coil to absorb inductive kickback energy. Use Value: 400 W rating handles typical 50–200 mJ coil energy bursts without degradation, eliminating need for snubber RC networks and saving board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | DO-214AA package; 36 V VWM; 58.1 V VC at 6.9 A; same 400 W PPPM but higher capacitance (~150 pF vs. ~50 pF) | Better suited for lower-frequency power rails; less ideal for high-speed signal lines due to higher junction capacitance | Select when board space allows SMC/SMB footprint and system bandwidth <10 MHz permits higher CJ |
| P6KE36CA | DO-15 package; 36 V VWM; 58.1 V VC at 6.9 A; 600 W PPPM rating but derated to 400 W at >100 °C ambient | Higher thermal mass improves single-pulse energy handling but slower response than BZW04 series due to larger junction area | Prefer for infrequent, high-energy surges in non-automotive industrial settings where AEC-Q101 is not required |
Compared with SMBJ36CA and P6KE36CA, the BZW04-37HE3/54 offers AEC-Q101 qualification, tighter VBR tolerance (±5%), lower junction capacitance, and optimized DO-41 lead geometry for through-hole reliability - making it the preferred choice for automotive and high-reliability industrial signal-line protection where qualification, size, and speed are critical.
Availability
BZW04-37HE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line card surge suppression, and consumer appliance motor drive protection requiring stable component supply and full traceability.
Supply support for BZW04-37HE3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The BZW04 series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for robust, cost-effective transient suppression in automotive, industrial, and telecom infrastructure - balancing high surge capability with tight parametric control and qualification rigor.
FAQ
What is the clamping voltage of the BZW04-37HE3/54 under a 10/1000 μs surge?
The BZW04-37HE3/54 exhibits a maximum clamping voltage (VC) of 59.3 V when subjected to its rated peak pulse current of 6.7 A using the standardized 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and guarantees that downstream circuitry sees no more than 59.3 V during such transient events - a critical parameter for protecting 3.3 V, 5 V, and 12 V logic and interface ICs. The BZW04-37HE3/54 maintains this performance across its full operating temperature range.
Is the BZW04-37HE3/54 suitable for automotive applications?
Yes, the BZW04-37HE3/54 is explicitly AEC-Q101 qualified, as confirmed in Vishay document 88316 (Rev. 16-Sep-2021). Its construction - including glass-passivated junction, DO-41 package with JESD201 class 2 whisker resistance, and 175 °C maximum junction temperature - meets automotive stress test requirements for temperature cycling, high-temperature operating life, and electrostatic discharge. The BZW04-37HE3/54 is deployed in engine control units, body control modules, and ADAS sensor interfaces.
What does the "HE3" suffix indicate in BZW04-37HE3/54?
The "HE3" suffix denotes RoHS-compliant, AEC-Q101 qualified commercial-grade packaging: "H" specifies AEC-Q101 qualification, "E3" indicates RoHS compliance and JESD201 class 2 whisker resistance. This distinguishes it from the "E3"-only variant (non-automotive grade) and confirms full compliance with automotive reliability standards. The BZW04-37HE3/54 is supplied in 13" paper tape and reel (package code 54, base quantity 550 units), as specified in Vishay's ordering information.
How does the bidirectional nature of the BZW04-37HE3/54 affect PCB layout?
The BZW04-37HE3/54 has no polarity marking - its bidirectional structure means both terminals behave identically under positive or negative transients, eliminating orientation constraints during placement. This simplifies PCB layout, reduces assembly errors, and avoids the need for silkscreen polarity indicators. Engineers can place the BZW04-37HE3/54 symmetrically across differential lines or unidirectional buses without concern for anode/cathode alignment - a key advantage over unidirectional TVS diodes.
What is the maximum reverse leakage current of the BZW04-37HE3/54 at its stand-off voltage?
The BZW04-37HE3/54 specifies a maximum reverse leakage current (ID) of 1.0 μA at its 36.8 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power drain in always-on circuits - critical for battery-powered automotive sensors and industrial remote I/O nodes. Leakage remains below 5 μA up to 125 °C, supporting reliable operation across the full industrial temperature range. The BZW04-37HE3/54 achieves this while maintaining tight VBR distribution and fast response.
BZW04-37HE3/54 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
BZW04-37HE3/54 FAQ
1.How can I place an order for BZW04-37HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-37HE3/54 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 BZW04-37HE3/54 reliable?
The price and inventory of BZW04-37HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-37HE3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-37HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-37HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-37HE3/54?
BZW04-37HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-37HE3/54 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 BZW04-37HE3/54?
For technical support, including BZW04-37HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-37HE3/54 requirements.
6.How does Aetrix verify that BZW04-37HE3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-37HE3/54 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 BZW04-37HE3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-37HE3/54?
All BZW04-37HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-37HE3/54, 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 BZW04-37HE3/54 part is unused and in its original packaging.
Return procedure for BZW04-37HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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