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Vishay General Semiconductor - Diodes Division BZW04P20HE3/73
- Part No.:
- BZW04P20HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P20HE3/73.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,124
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Product details
Overview
BZW04P20HE3/73 from Vishay General Semiconductor is a bi-directional TransZorb® transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, designed for robust overvoltage protection of 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 (IPPM), and 400 W peak pulse power (10/1000 µs waveform), making it suitable for automotive sensor interface and industrial I/O line protection.
For engineers reviewing the BZW04P20HE3/73 datasheet, BZW04P20HE3/73 pinout, BZW04P20HE3/73 application, or BZW04P20HE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, bi-directional symmetry, low clamping ratio (VC/VWM = 1.63), and 175 °C maximum junction temperature - critical for under-hood and high-reliability embedded systems.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with identical breakdown (VBR min/max = 22.8 V / 26.4 V at 1 mA), clamping (VC = 33.2 V), and leakage (ID ≤ 1.0 µA at VWM) characteristics in forward and reverse directions. Its glass-passivated junction ensures stable performance across temperature and long-term reliability under repetitive surge stress.
The device complies with ANSI/IEEE C62.35 surge standards, delivers 400 W peak pulse power with 0.01% duty cycle, and exhibits a temperature coefficient of VBR of +0.094 %/°C - enabling predictable voltage threshold drift in automotive thermal environments.
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. |
| VC @ IPPM | 33.2 V - Clamped voltage during 12.0 A 10/1000 µs surge; limits downstream IC stress to safe levels. |
| IPPM | 12.0 A - Peak surge current capability; supports IEC 61000-4-5 Level 3 (1 Ω/2 Ω coupling) transients. |
| PPPM | 400 W - Peak pulse power rating; enables protection against fast, high-energy inductive switching spikes. |
| TJ max | 175 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock. |
| Package | DO-204AL (DO-41) - Standard axial-leaded through-hole package with matte tin-plated leads, UL 94 V-0 molding compound. |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction in molded epoxy case. Leads are matte tin-plated, solderable per J-STD-002/JESD22-B102; no polarity marking for bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge path | No functional polarity - either lead serves as input/output terminal; identical clamping behavior in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional symmetry | Identical VBR, VC, and ID in both polarities - eliminates orientation concerns during PCB assembly and simplifies layout for AC-coupled or floating lines. |
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling (-55 °C to +175 °C), HAST, and mechanical shock - ensures field reliability in safety-critical modules. |
| Low clamping ratio | VC/VWM = 1.63 - minimizes voltage overshoot during transients, protecting 3.3 V/5 V logic interfaces without additional series impedance. |
| Glass passivation | Stable junction characteristics over time and humidity exposure - prevents parameter drift in harsh industrial environments. |
| RoHS & whisker-tested | HE3 suffix indicates JESD201 Class 2 whisker resistance and full RoHS compliance - meets automotive supply chain material requirements. |
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 ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point, shunting surge energy to ground before reaching sensitive ASICs. Use Value: Withstands 400 W surges while limiting clamped voltage to 33.2 V - preserving integrity of 24 V supply rails and 5 V microcontroller I/O pins. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field wiring transients and lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage protection element on signal conditioning stage, operating in parallel with precision op-amps and ADC drivers. Use Value: 12.0 A IPPM and 33.2 V VC ensure compatibility with IEC 61000-4-4/5 Level 4 immunity testing without derating or cascaded protection. |
| Consumer Power Adapter Output | Telecom Line Card Protection |
Use Scenario: Secondary-side transient suppression on DC output rails of wall adapters and USB PD chargers exposed to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Fast-response shunt protector placed after secondary rectifier and bulk capacitor, absorbing residual spikes not filtered by LC stages. Use Value: 10/1000 µs waveform capability and 0.01% duty cycle rating enable reliable handling of repetitive switch-mode noise and accidental short-circuit recovery spikes. |
Use Scenario: Overvoltage hardening of Ethernet PHY interfaces and POTS line drivers in network edge equipment subjected to induced surges from nearby AC mains or RF coupling. IC Role / Device Role / Timing Role: First-line bi-directional clamp on differential pairs or single-ended signal paths, coordinated with gas discharge tubes for multi-stage protection. Use Value: Symmetric clamping and 175 °C TJ max support uninterrupted operation in fanless telecom chassis with ambient temperatures up to 85 °C. |
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 | DO-214AA (SMB) package; same VWM (20 V), slightly higher VC (32.4 V), lower IPPM (12.3 A), 600 W PPPM. | Surface-mount alternative requiring PCB rework; better suited for space-constrained designs but lacks AEC-Q101 qualification. | Select SMBJ20CA only when board real estate is limited and automotive qualification is not required. |
| 1.5KE20CA | DO-201AD package; same VWM (20 V), higher VC (34.6 V), lower IPPM (11.6 A), 1500 W PPPM (10/1000 µs). | Higher-power through-hole option with larger footprint; intended for primary-level AC line protection rather than signal-level clamping. | Choose 1.5KE20CA for higher-energy surge scenarios where 33.2 V clamping is acceptable and board space allows larger package. |
Compared with SMBJ20CA and 1.5KE20CA, BZW04P20HE3/73 offers AEC-Q101 qualification, tighter VC tolerance (33.2 V vs. 34.6 V), and DO-41 compatibility with legacy through-hole manufacturing - making it optimal for cost-sensitive, high-reliability automotive and industrial replacements.
Availability
BZW04P20HE3/73 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC analog input hardening, and telecom line card surge suppression requiring stable component supply across extended production lifecycles.
Supply support for BZW04P20HE3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The BZW04P series belongs to Vishay's TransZorb® TVS family, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where bi-directional symmetry and AEC-Q101 compliance are mandatory.
FAQ
What is the polarity configuration of BZW04P20HE3/73?
BZW04P20HE3/73 is a bi-directional TVS diode with symmetrical electrical characteristics in both polarities. It has no cathode marking and functions identically regardless of lead orientation - ideal for AC-coupled or floating signal lines where polarity cannot be guaranteed during installation or maintenance.
Is BZW04P20HE3/73 qualified for automotive applications?
Yes, BZW04P20HE3/73 carries the HE3 suffix, confirming AEC-Q101 qualification per Vishay documentation. This includes validation for temperature cycling, high-acceleration stress test (HAST), and mechanical shock - meeting Tier 1 supplier requirements for engine control units, body electronics, and ADAS sensor modules.
What is the maximum clamping voltage of BZW04P20HE3/73 under surge conditions?
The maximum clamping voltage of BZW04P20HE3/73 is 33.2 V at 12.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by protected circuitry during standardized surge events.
How does the HE3 suffix differ from E3 in BZW04P20HE3/73?
The HE3 suffix in BZW04P20HE3/73 denotes AEC-Q101 qualification and JESD201 Class 2 whisker resistance, whereas E3 indicates commercial-grade RoHS compliance only. HE3 devices undergo additional stress testing for automotive use, including extended temperature cycling and humidity bias life testing - critical for under-hood deployment.
Can BZW04P20HE3/73 replace uni-directional TVS diodes in existing designs?
BZW04P20HE3/73 can replace uni-directional TVS diodes only if the circuit topology is inherently symmetrical (e.g., differential buses, AC signals, or floating grounds). It must not be used where DC bias polarity is fixed and cathode-anode directionality is essential - doing so may result in unintended conduction or failure to clamp correctly.
BZW04P20HE3/73 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):
- 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:
- -
- 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)
BZW04P20HE3/73 FAQ
1.How can I place an order for BZW04P20HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P20HE3/73 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 BZW04P20HE3/73 reliable?
The price and inventory of BZW04P20HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P20HE3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P20HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P20HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P20HE3/73?
BZW04P20HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P20HE3/73 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 BZW04P20HE3/73?
For technical support, including BZW04P20HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P20HE3/73 requirements.
6.How does Aetrix verify that BZW04P20HE3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P20HE3/73 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 BZW04P20HE3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P20HE3/73?
All BZW04P20HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P20HE3/73, 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 BZW04P20HE3/73 part is unused and in its original packaging.
Return procedure for BZW04P20HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P20HE3/73 Tags
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