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Vishay General Semiconductor - Diodes Division BZW04-37-E3/54
- Part No.:
- BZW04-37-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-37-E3/54.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,453
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Product details
Overview
BZW04-37-E3/54 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 and industrial I/O protection.
For engineers reviewing the BZW04-37-E3/54 datasheet, BZW04-37-E3/54 pinout, BZW04-37-E3/54 application, or BZW04-37-E3/54 equivalent, key selection criteria include clamping performance under 6.7 A surge, bidirectional symmetry for AC-coupled lines, DO-41 mechanical compatibility, and AEC-Q101 qualification for automotive-grade reliability.
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 VBR (min/max = 40.9 V / 45.2 V) and matched clamping behavior in both polarities ensure consistent protection for AC signals and differential buses.
Thermal design relies on DO-41's lead-frame construction enabling 1.5 W steady-state dissipation at TL = 75 °C, while derating curves support operation up to TJ = 175 °C. The 0.101 %/°C temperature coefficient of VBR ensures stable breakdown across automotive ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.8 V - maximum continuous reverse working voltage before leakage exceeds 1 μA; defines safe operating margin below clamping threshold |
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - guaranteed avalanche onset range; ensures reliable triggering without premature conduction |
| VC @ IPPM | 59.3 V at 6.7 A - clamped voltage during 10/1000 μs surge; limits downstream IC stress to safe levels |
| PPPM | 400 W - peak transient energy handling capability per IEEE C62.35; supports IEC 61000-4-5 Level 4 immunity |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage at rated stand-off; preserves signal integrity in high-impedance sensor circuits |
| TJ max. | 175 °C - extended junction temperature rating enables under-hood automotive use without thermal derating penalties |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTOL, TC, and ESD |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with axial leads; no polarity marking for bidirectional configuration; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical avalanche behavior in both directions; no cathode band - terminals interchangeable in PCB layout |
| Lead 1 | Connection to PCB trace | Standard axial lead; 0.028–0.034 inch diameter; supports 275 °C solder dip for 10 s per JESD22-B106 |
| Lead 2 | Connection to PCB trace | Matches Lead 1 mechanically and electrically; enables standard DO-41 footprint reuse across bidirectional TVS family |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under humidity and thermal cycling per AEC-Q101 |
| 400 W 10/1000 μs pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive port protection |
| Bidirectional symmetry | Identical VBR and VC in both polarities - eliminates need for orientation-aware placement on AC or differential lines |
| UL 94 V-0 molding compound | Self-extinguishing epoxy housing prevents flame propagation in enclosed enclosures and control cabinets |
| JESD201 Class 1A whisker resistance | Prevents tin whisker growth under thermal stress, critical for long-life automotive and industrial deployments |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, responding within <1 ns to suppress spikes exceeding 36.8 V. Use Value: Limits voltage seen by downstream ASIC to ≤59.3 V during 6.7 A surges, preventing latch-up or gate oxide damage in automotive-grade microcontrollers. |
Use Scenario: Shielding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against EFT bursts and lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side I/O terminals, operating in parallel with input RC filters and isolation barriers. Use Value: Maintains signal fidelity with only 1.0 μA leakage at 36.8 V, while absorbing 400 W transients without degradation across 10⁵+ surge events. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY magnetics and DSL line drivers from induced surges on outdoor copper pairs exposed to lightning proximity. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), providing fast-response clamping where GDT turn-on delay leaves vulnerability window. Use Value: Sub-nanosecond response ensures clamping initiates before GDT fully arcs, reducing let-through energy to <10 mJ per event. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs and Hall-effect sensors. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) shunt protector across motor coil terminals and sensor supply rails. Use Value: Withstands repetitive 40 A IFSM surges and maintains 175 °C junction rating, ensuring survival through thousands of motor start-stop cycles. |
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 @ 6.9 A; 600 W PPPM | Higher power rating but larger footprint; surface-mount only | Select when board space allows SMD placement and higher surge margin is required |
| P6KE36CA | DO-15 package; 36 V VWM; 58.1 V VC @ 6.9 A; 600 W PPPM; slower response than BZW04 series | Legacy through-hole alternative with lower surge repetition capability | Choose only for legacy DO-15 socket compatibility; avoid for new AEC-Q101 designs |
Compared with SMBJ36CA and P6KE36CA, BZW04-37-E3/54 offers tighter VBR tolerance (±5.5 % vs ±10 %), AEC-Q101 qualification out-of-box, and optimized DO-41 lead geometry for automated axial insertion - making it preferred for cost-sensitive, high-reliability automotive and industrial through-hole designs.
Availability
BZW04-37-E3/54 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line card surge suppression requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for BZW04-37-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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The BZW04 series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for bidirectional transient suppression in harsh environments where AEC-Q101 compliance, tight VBR matching, and repeatable clamping are mandatory.
FAQ
What is the polarity configuration of BZW04-37-E3/54?
BZW04-37-E3/54 is a bidirectional TVS diode with symmetrical avalanche characteristics in both directions. It has no cathode marking and uses an unmarked DO-41 package - terminals are functionally identical, allowing flexible PCB layout without orientation constraints. This configuration is confirmed in the Vishay datasheet Document Number 88316, Section "Polarity".
Is BZW04-37-E3/54 qualified for automotive applications?
Yes, BZW04-37-E3/54 is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88316, page 4, Note 1). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD - validating its suitability for under-hood and chassis-mounted automotive electronics.
What is the clamping voltage of BZW04-37-E3/54 under surge conditions?
The maximum clamping voltage (VC) of BZW04-37-E3/54 is 59.3 V at 6.7 A peak pulse current (IPPM) with a 10/1000 μs waveform, per the Electrical Characteristics table on page 2 of the Vishay datasheet. This value defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Does BZW04-37-E3/54 meet RoHS and REACH requirements?
Yes, BZW04-37-E3/54 carries the E3 suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and adherence to Vishay's material declaration per document 99912. It contains no restricted substances above threshold limits and is certified for commercial and automotive use without exemptions.
What is the maximum junction temperature rating for BZW04-37-E3/54?
The maximum junction temperature (TJ max.) for BZW04-37-E3/54 is +175 °C, as specified in the "PRIMARY CHARACTERISTICS" table on page 1 of the Vishay datasheet. This rating enables reliable operation in high-ambient environments such as engine compartments and industrial control cabinets without thermal shutdown.
BZW04-37-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04-37-E3/54 FAQ
1.How can I place an order for BZW04-37-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-37-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 BZW04-37-E3/54 reliable?
The price and inventory of BZW04-37-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 BZW04-37-E3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-37-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-37-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-37-E3/54?
BZW04-37-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-37-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 BZW04-37-E3/54?
For technical support, including BZW04-37-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-37-E3/54 requirements.
6.How does Aetrix verify that BZW04-37-E3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-37-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 BZW04-37-E3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-37-E3/54?
All BZW04-37-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-37-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 BZW04-37-E3/54 part is unused and in its original packaging.
Return procedure for BZW04-37-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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