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Vishay General Semiconductor - Diodes Division BZW04P20B-E3/73
- Part No.:
- BZW04P20B-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P20B-E3/73.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,795
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Product details
Overview
BZW04P20B-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 20.5 V stand-off voltage (VWM), 33.2 V clamping voltage (VC) at 12.0 A peak pulse current, and 400 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection circuits.
For engineers reviewing the BZW04P20B-E3/73 datasheet, BZW04P20B-E3/73 pinout, BZW04P20B-E3/73 application, or BZW04P20B-E3/73 equivalent, key selection criteria include its bi-directional polarity, DO-204AL (DO-41) package, AEC-Q101 qualification, low 1.0 µA max reverse leakage at VWM, and ±175 °C operating junction temperature range.
Technical Context
This bi-directional TVS diode operates symmetrically in both forward and reverse bias, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive transients.
The device complies with ANSI/IEEE C62.35 surge standards and delivers fast response time (<1 ns) to clamp ESD and inductive switching spikes. It is rated for 400 W peak pulse power (10/1000 µs), derated linearly above 25 °C ambient per the published thermal curve (Fig. 2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR @ IT | 22.8–26.4 V @ 1.0 mA - Breakdown voltage range confirming reliable turn-on during overvoltage events. |
| VC @ IPPM | 33.2 V @ 12.0 A - Clamping voltage under full 400 W surge; limits downstream IC stress to safe levels. |
| IPPM | 12.0 A - Peak pulse current capacity with 10/1000 µs waveform; supports common ISO 7637-2 Pulse 1/2/5a test levels. |
| PPPM | 400 W - Peak pulse power rating; enables single-device protection for moderate-energy transients in automotive and industrial environments. |
| TJ Range | −55 °C to +175 °C - Wide junction temperature range supporting under-hood and industrial control cabinet deployment. |
| Leakage @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
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 / Cathode (bi-directional) | Surge current path terminal | No polarity marking; symmetrical conduction allows installation without orientation concern on PCB or harness. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, body electronics, and ADAS sensor protection. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter consistency across life cycle and environmental stress. |
| 400 W peak pulse power (10/1000 µs) | Provides headroom to absorb multiple ISO 7637-2 transient pulses without degradation in automotive 12 V/24 V systems. |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes protected circuit overvoltage exposure - critical for safeguarding 3.3 V/5 V logic interfaces behind level-shifting stages. |
| RoHS-compliant, matte tin leads | Enables lead-free reflow assembly and meets global environmental compliance requirements without sacrificing solder joint reliability. |
Applications
| Automotive Sensor 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 kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional clamping element placed at connector interface to shunt transients before reaching signal conditioning ICs. Use Value: Maintains signal fidelity under ISO 16750-2 Class D (12 V system) and Class E (24 V system) tests while surviving >1000 surge cycles. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field-wiring faults and lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series impedance and filtering components. Use Value: Limits input voltage to ≤33.2 V during 1 kV/500 A surge events (IEC 61000-4-5 Level 3), preventing ADC saturation and op-amp latch-up. |
| Consumer Appliance Motor Drive Protection | Telecom Line Interface Protection |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in smart home appliances (e.g., washing machine motor control boards) from relay coil flyback and EMI coupling. IC Role / Device Role / Timing Role: Localized TVS at MOSFET gate driver output and MCU reset line to suppress sub-100 ns transients. Use Value: Responds in <1 ns to clamp spikes up to 400 W, eliminating need for additional RC snubbers and reducing board space by 30%. |
Use Scenario: Protecting Ethernet PHYs, DSL line drivers, and POTS interface ICs from induced surges on unshielded twisted-pair cabling in residential gateways and base stations. IC Role / Device Role / Timing Role: First-line bi-directional clamp on differential pair inputs, preceding common-mode chokes and data transformers. Use Value: Withstands repeated 10/700 µs surges per ITU-T K.21 Basic Level while maintaining <0.5 pF junction capacitance at 0 V bias - preserving signal integrity up to 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA | Same DO-214AA package; 20 V VWM, 32.4 V VC @ 12.3 A, but lower 600 W PPPM rating and no AEC-Q101 qualification. | Preferred for cost-sensitive consumer electronics; unsuitable for automotive under-hood use due to missing qualification. | Select SMBJ20CA only when AEC-Q101 is not required and higher clamping margin is acceptable. |
| 1.5KE20CA | DO-201AD package; 20 V VWM, 34.6 V VC @ 11.6 A, 1500 W PPPM, but larger footprint and higher leakage (5.0 µA). | Better suited for high-energy telecom surge protection; less optimal for space-constrained automotive modules. | Choose 1.5KE20CA where peak energy absorption dominates size constraints and leakage is not critical. |
Compared with SMBJ20CA and 1.5KE20CA, BZW04P20B-E3/73 offers the optimal balance of AEC-Q101 compliance, compact DO-41 form factor, and precise 33.2 V clamping - making it the preferred choice for automotive and industrial designs requiring validated reliability in tight layouts.
Availability
BZW04P20B-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, and telecom line interface protection requiring stable component supply and traceable sourcing.
Supply support for BZW04P20B-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 diodes, rectifiers, optoelectronics, and passive components with emphasis on reliability and performance in harsh environments.
The BZW04P series belongs to Vishay's TransZorb® TVS family, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecommunications infrastructure where AEC-Q101 validation and stable clamping are mandatory.
FAQ
What is the maximum clamping voltage of BZW04P20B-E3/73 under surge conditions?
The BZW04P20B-E3/73 has a maximum clamping voltage (VC) of 33.2 V at 12.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures downstream ICs remain within safe voltage limits during transient events. The clamping performance is confirmed per ANSI/IEEE C62.35 standards and validated in Vishay's production testing for every BZW04P20B-E3/73 lot.
Is BZW04P20B-E3/73 suitable for automotive applications?
Yes, BZW04P20B-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its −55 °C to +175 °C operating junction temperature range, glass-passivated junction, and compliance with ISO 7637-2 transient immunity requirements make it appropriate for protecting ECUs, sensor modules, and body control units. The "HE3" suffix variant adds enhanced whisker resistance, but BZW04P20B-E3/73 itself meets JESD201 Class 1A.
Does BZW04P20B-E3/73 have polarity markings on the package?
No, BZW04P20B-E3/73 is a bi-directional TVS diode and carries no polarity marking on the DO-204AL (DO-41) package. Its symmetrical electrical characteristics allow installation in either orientation - a key advantage for protecting AC-coupled lines, differential pairs, or floating nodes where polarity cannot be assumed. This eliminates orientation errors during manual or automated assembly.
What is the reverse leakage current specification for BZW04P20B-E3/73 at its stand-off voltage?
At its 20.5 V stand-off voltage (VWM) and 25 °C ambient temperature, BZW04P20B-E3/73 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes power loss in battery-operated systems. Leakage remains below 5.0 µA even at +85 °C, as verified in Vishay's thermal derating characterization.
Can BZW04P20B-E3/73 replace uni-directional TVS diodes in existing designs?
BZW04P20B-E3/73 can replace uni-directional TVS diodes only if the circuit topology is inherently symmetrical (e.g., differential signaling, AC-coupled lines, or floating references). It must not be used in DC-biased unidirectional paths - such as power rail clamping - where cathode/anode orientation matters. Always verify that the protected node lacks DC bias relative to ground before substituting BZW04P20B-E3/73 for a uni-directional part like BZW04P20-E3/73.
BZW04P20B-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
BZW04P20B-E3/73 FAQ
1.How can I place an order for BZW04P20B-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P20B-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 BZW04P20B-E3/73 reliable?
The price and inventory of BZW04P20B-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 BZW04P20B-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P20B-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P20B-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P20B-E3/73?
BZW04P20B-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P20B-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 BZW04P20B-E3/73?
For technical support, including BZW04P20B-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P20B-E3/73 requirements.
6.How does Aetrix verify that BZW04P20B-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P20B-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 BZW04P20B-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P20B-E3/73?
All BZW04P20B-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P20B-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 BZW04P20B-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P20B-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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