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Vishay General Semiconductor - Diodes Division BZW04-37B-E3/54
- Part No.:
- BZW04-37B-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-37B-E3/54.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,206
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Product details
Overview
BZW04-37B-E3/54 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 a 36.8 V stand-off voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, 59.3 V maximum clamping voltage (VC) at 6.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O lines against ESD and inductive switching surges.
For engineers reviewing the BZW04-37B-E3/54 datasheet, BZW04-37B-E3/54 pinout, BZW04-37B-E3/54 application, or BZW04-37B-E3/54 equivalent, this device serves as a RoHS-compliant, AEC-Q101-qualified bidirectional TVS for robust overvoltage protection in automotive sensor modules, industrial PLC inputs, and telecom line interface circuits where low leakage (<1 μA at VWM) and fast response (<1 ns) are critical.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and IPPM specifications across forward and reverse directions. Its glass-passivated junction ensures stable clamping performance and low incremental surge resistance under repetitive 10/1000 μs transients at 0.01% duty cycle.
The device is rated for TJ = −55 °C to +175 °C operation, supports 1.5 W steady-state power dissipation at TL = 75 °C, and exhibits a VBR temperature coefficient of +0.101 %/°C - enabling predictable voltage drift in high-temperature environments such as engine control units or motor drive feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.8 V - Maximum continuous reverse/forward working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during transient events above system rail. |
| VC @ IPPM | 59.3 V at 6.7 A - Clamped voltage seen by protected circuit during 400 W surge; limits stress on downstream ICs. |
| PPPM | 400 W - Peak pulse power handling with 10/1000 μs waveform; meets IEC 61000-4-5 Level 3 surge immunity requirements. |
| IDR @ VWM | <1.0 μA - Ultra-low reverse leakage at stand-off voltage; prevents signal distortion or bias shift in high-impedance sensor nodes. |
| TJ max. | +175 °C - Extended junction temperature rating enables use in under-hood automotive or industrial power supply monitoring. |
| Package | DO-41 (DO-204AL) - Standard axial-leaded through-hole package with 0.375" lead length; compatible with legacy wave-solder and hand-solder processes. |
Pinout & Package
DO-41 package: axial-leaded, cylindrical epoxy-molded case with no polarity marking for bidirectional operation. Leads are matte tin-plated, solderable per J-STD-002 and JESD22-B102, and rated for solder dip at 275 °C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical bidirectional clamping behavior - either lead may connect to line or ground; no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR and low leakage over lifetime; resists moisture ingress and thermal cycling degradation. |
| 400 W peak pulse power (10/1000 μs) | Withstands repeated lightning-induced surges per IEC 61000-4-5 without parametric shift or failure. |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| UL 94 V-0 molding compound | Self-extinguishing epoxy housing meets flame-retardancy requirements for industrial and transportation equipment. |
| RoHS-compliant (E3 suffix) | Lead-free matte tin plating and halogen-free mold compound support environmental compliance in global markets. |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role: Bidirectional clamping element placed between sensor signal line and ground, shunting transients before they reach ADC input or op-amp buffer. Use Value: Maintains signal integrity with <1 μA leakage at 36.8 V, while clamping 6.7 A surges to ≤59.3 V - preventing ADC saturation or op-amp latch-up. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers subject to relay coil flyback and field wiring ESD. IC Role / Device Role: Line-side TVS connected between input terminal and common rail, absorbing inductive energy from solenoid/valve switching. Use Value: 400 W pulse rating handles repetitive 100 V/1 A transients; DO-41 form factor allows direct replacement of legacy MOVs or unidirectional TVS diodes. |
| Telecom Line Interface | Consumer Power Adapter Feedback Path |
Use Scenario: Shielding RS-485 transceiver data lines in base station backhaul equipment from induced lightning surges on long cable runs. IC Role / Device Role: Differential-mode TVS pair (one per line) referenced to local ground, suppressing common-mode and differential transients simultaneously. Use Value: Symmetrical bidirectional response ensures equal clamping on TX+/TX−; 59.3 V clamp preserves receiver common-mode range up to ±7 V. |
Use Scenario: Securing optocoupler feedback path in isolated AC/DC adapters against primary-side switching noise coupling into secondary-side regulation loop. IC Role / Device Role: Low-capacitance TVS placed across optocoupler input pins to suppress fast-rising spikes without distorting feedback timing. Use Value: Sub-1 μA leakage avoids regulation error; 0.101 %/°C VBR TC minimizes temperature-induced reference drift in closed-loop control. |
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 (SMB) surface-mount package; 36 V VWM, 58.1 V VC @ 6.9 A; same 400 W PPPM. | Requires PCB rework for SMT assembly; higher thermal resistance than DO-41 in natural convection. | Select when board space is constrained and automated assembly is preferred over through-hole. |
| P6KE36CA | DO-15 package; 36 V VWM, 58.1 V VC @ 6.9 A; 600 W PPPM; larger footprint and higher IFSM (100 A). | Higher surge margin but less precise VBR tolerance (±10% vs. ±5% for BZW04-37B); not AEC-Q101 qualified. | Choose for cost-sensitive industrial applications where automotive qualification is unnecessary and higher single-pulse robustness is needed. |
Compared with SMBJ36CA and P6KE36CA, the BZW04-37B-E3/54 offers AEC-Q101 qualification, tighter VBR tolerance (±5%), and lower leakage in a proven DO-41 through-hole format - making it optimal for automotive and high-reliability industrial designs requiring traceable legacy compatibility and thermal stability.
Availability
BZW04-37B-E3/54 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input conditioning, and telecom line interface circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for BZW04-37B-E3/54 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, TVS devices, and power MOSFETs with emphasis on reliability, precision, and automotive-grade qualification.
The BZW04 series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial automation, and infrastructure applications demanding AEC-Q101 validation and extended temperature operation.
FAQ
What is the polarity configuration of BZW04-37B-E3/54?
The BZW04-37B-E3/54 is a bidirectional TVS diode with symmetrical clamping characteristics in both forward and reverse directions. It has no cathode marking on the DO-41 package, confirming its bidirectional design - unlike unidirectional variants (e.g., BZW04-37-E3/54) which feature a color band denoting the cathode end. This symmetry makes BZW04-37B-E3/54 ideal for protecting AC-coupled or differential signal lines where polarity reversal may occur.
Is BZW04-37B-E3/54 qualified for automotive applications?
Yes, BZW04-37B-E3/54 is AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 16-Sep-2021 (Document Number: 88316). The HE3 suffix denotes AEC-Q101 qualification, but the E3/54 variant - while RoHS-compliant and manufactured to the same die and process - is specified for commercial grade per note "BZW04-213(B) to BZW04-376(B) for commercial grade only". Therefore, BZW04-37B-E3/54 meets all electrical and mechanical specs of the qualified family but carries commercial-grade qualification status.
What is the maximum clamping voltage of BZW04-37B-E3/54 under surge conditions?
The maximum clamping voltage (VC) of BZW04-37B-E3/54 is 59.3 V at a peak pulse current (IPPM) of 6.7 A, measured with a 10/1000 μs waveform. This value represents the upper limit of voltage imposed on the protected circuit during a standardized surge event, ensuring downstream components such as microcontrollers or transceivers remain within safe operating limits. The BZW04-37B-E3/54 maintains this clamping performance across its full operating temperature range.
How does the temperature coefficient affect BZW04-37B-E3/54's breakdown voltage?
The BZW04-37B-E3/54 has a positive temperature coefficient of +0.101 %/°C for its breakdown voltage (VBR). This means VBR increases by approximately 0.037 V per °C rise above 25 °C - for example, at 125 °C junction temperature, VBR shifts upward by ~10.1 V from its nominal 43.05 V midpoint. This predictable drift allows designers using BZW04-37B-E3/54 in high-temperature environments to maintain adequate margin between VWM and elevated VBR.
Can BZW04-37B-E3/54 replace older unidirectional TVS diodes in existing designs?
BZW04-37B-E3/54 can replace unidirectional TVS diodes like BZW04-37-E3/54 only if the circuit topology supports bidirectional clamping - for instance, in AC signal paths, floating references, or differential bus lines. Since BZW04-37B-E3/54 lacks polarity marking and conducts identically in both directions, it must not be used where DC bias or asymmetric protection is required. Always verify layout and grounding scheme before substituting BZW04-37B-E3/54 into a design originally using a unidirectional device.
BZW04-37B-E3/54 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04-37B-E3/54 FAQ
1.How can I place an order for BZW04-37B-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-37B-E3/54 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 BZW04-37B-E3/54 reliable?
The price and inventory of BZW04-37B-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-37B-E3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-37B-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-37B-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-37B-E3/54?
BZW04-37B-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-37B-E3/54 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 BZW04-37B-E3/54?
For technical support, including BZW04-37B-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-37B-E3/54 requirements.
6.How does Aetrix verify that BZW04-37B-E3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-37B-E3/54 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 BZW04-37B-E3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-37B-E3/54?
All BZW04-37B-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-37B-E3/54, 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 BZW04-37B-E3/54 part is unused and in its original packaging.
Return procedure for BZW04-37B-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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