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Vishay General Semiconductor - Diodes Division BZW04-37BHE3/54
- Part No.:
- BZW04-37BHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-37BHE3/54.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,018
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Product details
Overview
BZW04-37BHE3/54 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-41 package, designed for robust overvoltage protection of signal and power lines. It features a 36.8 V stand-off 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 (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 protection.
For engineers reviewing the BZW04-37BHE3/54 datasheet, BZW04-37BHE3/54 pinout, BZW04-37BHE3/54 application, or BZW04-37BHE3/54 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, DO-41 mechanical compatibility, and verified 175 °C junction temperature rating for under-hood and high-reliability embedded environments.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR min/max (40.9–45.2 V), VC (59.3 V), and IPPM (6.7 A) values across reverse and forward directions. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and low incremental surge resistance, enabling precise clamping during fast transients.
The device complies with ANSI/IEEE C62.35 surge standards and supports repetitive 10/1000 μs pulses at 0.01% duty cycle. Thermal derating follows Fig. 2, maintaining 400 W PPPM up to 25 °C ambient and linearly reducing to ~200 W at 125 °C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.8 V - maximum continuous working voltage before clamping initiates; defines safe operating margin for 33–36 V nominal systems. |
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - tight breakdown tolerance ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 59.3 V at 6.7 A - clamping voltage limits protected circuit stress during 400 W surge events without latch-up. |
| PPPM | 400 W - peak pulse power handling per 10/1000 μs waveform, validated for automotive load-dump and ESD-induced surges. |
| TJ max. | +175 °C - extended junction temperature rating enables deployment in engine control units and industrial motor drives. |
| AEC-Q101 | Qualified - certified for automotive applications per stress test requirements including HTRB, HTGB, and temperature cycling. |
| Package | DO-41 (DO-204AL) - industry-standard axial leaded package with 0.375" (9.5 mm) lead length, UL 94 V-0 rated epoxy molding. |
Pinout & Package
DO-41 (DO-204AL) package: axial-leaded, glass-passivated silicon junction in molded epoxy housing. Leads are matte tin-plated, solderable per J-STD-002/JESD22-B102, with 0.028–0.034" diameter and 1.0" minimum body length. No polarity marking - bidirectional operation confirmed by 'B' suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | Accepts surge current during negative-going transients; symmetrical with cathode due to bidirectional design. |
| Cathode | Transient current entry (forward bias) | Accepts surge current during positive-going transients; electrically identical to anode in BZW04-37BHE3/54. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR and low leakage (<1.0 μA) across -55 to +175 °C, critical for automotive under-hood reliability. |
| 400 W 10/1000 μs pulse rating | Withstands ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 Level 3 (1 kV/2 Ω) without degradation. |
| AEC-Q101 qualification | Validated for automotive electronics per stress tests including 1000-hr HTGB, 1000-cycle TC, and 1000-hr HTRB. |
| UL 94 V-0 molding compound | Self-extinguishing epoxy prevents flame propagation in safety-critical enclosures and battery management systems. |
| Matte tin leads, JESD201 class 2 | Whisker-resistant termination ensures long-term solder joint integrity in high-vibration industrial control panels. |
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 inductive switching transients in engine control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing energy while holding line voltage ≤59.3 V during 6.7 A surges. Use Value: Prevents damage to 3.3 V/5 V microcontrollers and ADC front-ends without adding series impedance or signal distortion. | Use Scenario: Shielding digital input/output channels on programmable logic controllers against field-wiring induced surges and ground loop transients in factory automation. IC Role / Device Role / Timing Role: Standoff protector mounted directly at connector entry point, shunting >95% of 400 W surge energy to chassis ground within <1 ns. Use Value: Eliminates need for external RC snubbers or gas discharge tubes, reducing BOM count and PCB area in DIN-rail mounted I/O modules. |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Safeguarding Ethernet PHYs, RS-485 transceivers, and DSL line drivers against lightning-induced surges and AC power cross-talk in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on differential pair or single-ended line, operating symmetrically to preserve signal integrity during ±59.3 V clamping. Use Value: Maintains <1 pF junction capacitance at VWM, avoiding data rate degradation in 100 Mbps+ communication links. | Use Scenario: Secondary surge suppression on DC input rails (e.g., 24 V or 48 V) of industrial power supplies after primary MOV stage, catching fast-rising residual transients. IC Role / Device Role / Timing Role: Fast-response secondary clamp that activates before downstream regulators or MOSFETs experience overvoltage stress. Use Value: Extends system MTBF by preventing cumulative gate oxide damage in synchronous rectifiers and PWM controllers during repeated surge events. |
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 (SMB), 36 V VWM, 58.1 V VC @ 6.9 A, same 400 W PPPM but higher thermal resistance (RθJA = 50 °C/W vs. DO-41's ~60 °C/W). | Surface-mount alternative for space-constrained PCBs; lacks AEC-Q101 qualification in standard grade. | Select SMBJ36CA only when board real estate is limited and automotive qualification is not required. |
| P6KE36CA | DO-15 package, 36 V VWM, 58.1 V VC @ 6.9 A, 600 W PPPM (10/1000 μs), but wider VBR tolerance (40–44.2 V) and no AEC-Q101 certification. | Higher pulse power margin for non-automotive industrial use; larger DO-15 footprint requires layout revision. | Choose P6KE36CA for cost-sensitive, non-automotive designs needing extra surge headroom and legacy through-hole compatibility. |
Compared with SMBJ36CA and P6KE36CA, BZW04-37BHE3/54 delivers AEC-Q101 assurance in the compact DO-41 form factor, tighter VBR control (±5%), and optimized thermal performance for sustained surge duty cycles in automotive ECUs and industrial controllers.
Availability
BZW04-37BHE3/54 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for BZW04-37BHE3/54 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 and automotive-grade validation.
The BZW04 series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments where AEC-Q101 compliance, tight parametric control, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of BZW04-37BHE3/54 and how is it measured?
The clamping voltage (VC) of BZW04-37BHE3/54 is 59.3 V, measured at a peak pulse current (IPPM) of 6.7 A using the standardized 10/1000 μs double-exponential waveform per ANSI/IEEE C62.35. This value represents the maximum voltage seen across the device terminals during surge conduction and is guaranteed across the full operating temperature range of -55 to +175 °C.
Is BZW04-37BHE3/54 qualified for automotive applications?
Yes, BZW04-37BHE3/54 carries the HE3 suffix, confirming it is RoHS-compliant and AEC-Q101 qualified. It has passed all required stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling, and unbiased highly accelerated stress testing (uHAST), making it suitable for engine control units, ADAS sensors, and body electronics.
How does the bidirectional configuration of BZW04-37BHE3/54 affect its circuit implementation?
The bidirectional configuration of BZW04-37BHE3/54 means it provides symmetrical clamping for both positive and negative transients without polarity marking or orientation dependency. In practice, it is installed across the protected line and ground (or differential pair) with no anode/cathode distinction - simplifying layout and eliminating assembly errors common with unidirectional TVS devices.
What is the maximum junction temperature rating for BZW04-37BHE3/54 and why does it matter?
The maximum junction temperature (TJ max.) for BZW04-37BHE3/54 is +175 °C. This elevated rating allows reliable operation in under-hood automotive environments, industrial motor drives, and enclosed power supplies where ambient temperatures exceed 125 °C. It also enables higher surge repetition rates without thermal runaway, as confirmed by the derating curve in Figure 2 of the datasheet.
Can BZW04-37BHE3/54 replace older P6KE-series TVS diodes in existing designs?
BZW04-37BHE3/54 is not a direct drop-in replacement for P6KE36CA due to differences in package (DO-41 vs. DO-15), lead spacing, and thermal profile. While electrical parameters align closely (VWM = 36.8 V vs. 36 V, VC = 59.3 V vs. 58.1 V), mechanical redesign is required. However, its tighter VBR tolerance and AEC-Q101 qualification make it a superior upgrade path for new automotive or industrial designs.
BZW04-37BHE3/54 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):
- 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)
BZW04-37BHE3/54 FAQ
1.How can I place an order for BZW04-37BHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-37BHE3/54 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 BZW04-37BHE3/54 reliable?
The price and inventory of BZW04-37BHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-37BHE3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-37BHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-37BHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-37BHE3/54?
BZW04-37BHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-37BHE3/54 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 BZW04-37BHE3/54?
For technical support, including BZW04-37BHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-37BHE3/54 requirements.
6.How does Aetrix verify that BZW04-37BHE3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-37BHE3/54 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 BZW04-37BHE3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-37BHE3/54?
All BZW04-37BHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-37BHE3/54, 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 BZW04-37BHE3/54 part is unused and in its original packaging.
Return procedure for BZW04-37BHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-37BHE3/54 Tags
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