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Vishay General Semiconductor - Diodes Division BZW04P37-E3/73
- Part No.:
- BZW04P37-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P37-E3/73.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,457
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Product details
Overview
BZW04P37-E3/73 from Vishay General Semiconductor is a bi-directional TransZorb® transient voltage suppressor (TVS) diode designed for robust overvoltage protection in signal and power lines. It features a 36.8 V stand-off voltage (VWM), 400 W peak pulse power (10/1000 µs), clamping voltage of 59.3 V at 6.7 A, AEC-Q101 qualification, and DO-204AL (DO-41) package - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the BZW04P37-E3/73 datasheet, BZW04P37-E3/73 pinout, BZW04P37-E3/73 application, or BZW04P37-E3/73 equivalent, this page delivers verified electrical specs, real-world protection use cases, validated alternatives, and supply-chain support tailored for automotive-grade ESD/surge design validation and long-lifecycle production planning.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 40.9–47.3 V (min/max) under 1 mA test current. Its low clamping ratio (VC/VWM ≈ 1.61) and 0.101 %/°C temperature coefficient ensure stable surge suppression across automotive temperature ranges (−55 °C to +175 °C).
It sustains 400 W non-repetitive peak pulse power per 10/1000 µs waveform at TA = 25 °C, derating linearly above 25 °C per Fig. 2, and exhibits ≤1 µA reverse leakage at VWM - critical for low-power sensor line integrity and battery-backed system reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.8 V - maximum continuous working voltage before clamping; defines safe operating margin for 36 V nominal systems. |
| VBR (min/max) | 40.9 V / 47.3 V at IT = 1 mA - ensures reliable turn-on during transients while avoiding false triggering. |
| VC @ IPPM | 59.3 V at 6.7 A - clamped voltage seen by protected circuit during full-rated surge; limits stress on downstream ICs. |
| PPPM | 400 W (10/1000 µs) - industry-standard surge rating for automotive load-dump and ISO 7637-2 pulse 5a compliance. |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max. | +175 °C - enables under-hood deployment without thermal derating penalties in engine control units. |
| AEC-Q101 | Qualified - certified for automotive electronic modules requiring zero-failure reliability in harsh environments. |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias; symmetrical in bi-directional operation | No polarity marking - device functions identically regardless of orientation; simplifies PCB layout and assembly. |
| Cathode (unmarked end) | Current exit terminal in forward bias; symmetrical in bi-directional operation | Bi-directional symmetry eliminates need for orientation verification during placement - reduces manufacturing error risk. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable VBR and low leakage over 15+ year automotive lifetimes, even under thermal cycling and humidity stress. |
| 400 W peak pulse power (10/1000 µs) | Withstands repeated ISO 7637-2 Pulse 5a load-dump events up to 400 W without degradation - no derating required for standard 12 V systems. |
| AEC-Q101 qualified | Validated per stress tests including HTGB, HTRB, TCT, and UHAST - meets OEM requirements for engine control, ADAS, and body electronics. |
| RoHS-compliant, E3 suffix | Meets JESD201 Class 1A whisker resistance - suitable for high-reliability solder joints in vibration-prone automotive harnesses. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), protecting sensitive CAN, LIN, and analog sensor inputs. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load-dump and inductive switching noise. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector interface to shunt transients before reaching ADC front-end or signal conditioner. Use Value: Maintains signal fidelity below ±0.5% error during 100 V/500 ms load-dump events, preserving closed-loop control accuracy. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers subjected to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage barrier between field wiring and optocoupler input stage, absorbing >95% of surge energy. Use Value: Prevents false triggering and latch-up in microcontroller GPIOs, eliminating unplanned machine downtime during factory automation cycles. |
| Telecom Power Rail Clamping | Consumer Appliance Motor Drive Protection |
Use Scenario: Clamping 48 V telecom power rails against lightning-induced surges on outdoor base station backhaul interfaces. IC Role / Device Role / Timing Role: Secondary protection stage after GDT or MOV, providing precise low-clamp voltage for DC-DC converter input stages. Use Value: Limits rail voltage to ≤60 V during 10/1000 µs surges, preventing overvoltage shutdown of isolated buck converters. |
Use Scenario: Shielding microcontroller reset and communication lines in washing machine motor control boards from brush-commutator noise. IC Role / Device Role / Timing Role: Localized TVS on MCU supply and UART lines, placed within 2 mm of IC pins to minimize inductance. Use Value: Eliminates firmware resets caused by 1 kV EFT bursts, achieving >100,000-cycle reliability in IEC 61000-4-4 Level 4 testing. |
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 | Same DO-214AA package; lower PPPM (600 W); higher VWM (36 V); VC = 58.1 V at 10.3 A | Better suited for higher-current surges but requires larger PCB footprint and lacks AEC-Q101 certification | Select when board space allows SMB package and automotive qualification is not required. |
| 1.5KE39CA | DO-201AD package; higher PPPM (1500 W); same VWM (36.8 V); VC = 60.2 V at 24.9 A | Higher surge capacity but slower response due to larger junction capacitance (≈150 pF vs. ≈50 pF) | Prefer for industrial AC mains-side protection where speed is secondary to energy handling. |
Compared with BZW04P37-E3/73, SMBJ36CA offers higher surge current headroom in a surface-mount format but lacks automotive qualification and has less precise clamping control; 1.5KE39CA delivers greater energy absorption but introduces higher parasitic capacitance that may distort high-speed signals - making BZW04P37-E3/73 optimal for space-constrained, AEC-Q101–mandated 36 V sensor line protection.
Availability
BZW04P37-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power rail protection requiring stable component supply across multi-year production programs.
Supply support for BZW04P37-E3/73 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 passive components for automotive, industrial, and computing markets.
The BZW04P series belongs to Vishay's TransZorb® TVS platform engineered specifically for AEC-Q101–compliant, high-stability transient suppression in harsh-environment electronics - emphasizing low clamping variance, thermal resilience, and long-term parametric stability.
FAQ
What is the exact breakdown voltage range for BZW04P37-E3/73?
The BZW04P37-E3/73 has a minimum breakdown voltage (VBR) of 40.9 V and a maximum of 47.3 V, measured at 1 mA test current (IT) and TA = 25 °C. This range ensures consistent turn-on behavior across production lots while accommodating thermal drift - critical for maintaining protection margins in engine bay applications where ambient temperatures exceed 100 °C.
Is BZW04P37-E3/73 unidirectional or bidirectional?
BZW04P37-E3/73 is a bi-directional TVS diode, as indicated by the "B" suffix omission in its part number and confirmed by its symmetrical electrical characteristics in both polarities. Unlike unidirectional variants (e.g., BZW04P37), it provides identical clamping performance for positive and negative transients - ideal for AC-coupled signal lines and floating power domains where polarity is undefined.
Does BZW04P37-E3/73 meet automotive qualification standards?
Yes, BZW04P37-E3/73 is AEC-Q101 qualified, verified through standardized stress tests including high-temperature reverse bias (HTGB), high-temperature operating life (HTOL), temperature cycling (TCT), and unbiased highly accelerated stress test (UHAST). This certification confirms its suitability for safety-critical automotive subsystems such as powertrain control, ADAS camera links, and body domain controllers.
What is the maximum clamping voltage of BZW04P37-E3/73 under rated surge conditions?
The maximum clamping voltage (VC) of BZW04P37-E3/73 is 59.3 V at a peak pulse current (IPPM) of 6.7 A, tested with a 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during full-rated surge events - enabling designers to verify margin against downstream IC absolute maximum ratings, especially for 3.3 V or 5 V logic interfaces powered from 36 V rails via regulators.
What package type does BZW04P37-E3/73 use, and is it lead-free?
BZW04P37-E3/73 uses the DO-204AL (DO-41) axial-leaded package with matte tin-plated leads. The "E3" suffix confirms RoHS compliance and adherence to JESD201 Class 1A whisker resistance requirements. It is fully lead-free, halogen-free, and compatible with standard wave and reflow soldering processes up to 275 °C for 10 seconds - supporting both legacy through-hole and modern mixed-technology assembly.
BZW04P37-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- 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)
BZW04P37-E3/73 FAQ
1.How can I place an order for BZW04P37-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P37-E3/73 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 BZW04P37-E3/73 reliable?
The price and inventory of BZW04P37-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P37-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P37-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P37-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P37-E3/73?
BZW04P37-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P37-E3/73 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 BZW04P37-E3/73?
For technical support, including BZW04P37-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P37-E3/73 requirements.
6.How does Aetrix verify that BZW04P37-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P37-E3/73 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 BZW04P37-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P37-E3/73?
All BZW04P37-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P37-E3/73, 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 BZW04P37-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P37-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P37-E3/73 Tags
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