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Vishay General Semiconductor - Diodes Division BZW04P28HE3/73
- Part No.:
- BZW04P28HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P28HE3/73.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,020
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Product details
Overview
BZW04P28HE3/73 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 28.2 V stand-off voltage (VWM), 45.7 V clamping voltage (VC) at 8.8 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), making it suitable for protecting automotive sensor interfaces and industrial I/O circuits against ESD and inductive switching transients.
For engineers reviewing the BZW04P28HE3/73 datasheet, BZW04P28HE3/73 pinout, BZW04P28HE3/73 application, or BZW04P28HE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, DO-204AL (DO-41) package, bi-directional symmetry, low leakage (<1 µA at VWM), and temperature coefficient of breakdown voltage (0.098 %/°C).
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical avalanche breakdown in both polarities, enabling bidirectional surge suppression without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, critical for consistent clamping under repetitive transients.
The BZW04P28HE3/73 is rated for 175 °C maximum junction temperature and derates linearly above 25 °C ambient per Vishay's Fig. 2 curve. It meets JESD22-B102 solderability standards and passes JESD201 Class 2 whisker testing due to its HE3 suffix - confirming AEC-Q101 qualification and automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.2 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 31.4 V / 36.3 V at 1 mA - Confirmed breakdown voltage range ensures predictable turn-on across production lots. |
| VC @ IPPM | 45.7 V at 8.8 A - Clamping voltage under 10/1000 µs surge; limits protected circuit stress during worst-case transient. |
| PPPM | 400 W - Peak pulse power handling capability with 0.01 % duty cycle; supports high-energy transient absorption. |
| IPPM | 8.8 A - Peak pulse current rating for 10/1000 µs waveform; directly determines surge current capacity. |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial environments. |
| Temp. Coeff. | 0.098 %/°C - Temperature coefficient of VBR; quantifies drift in breakdown voltage over temperature range. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads, solderable per J-STD-002 and JESD22-B102. No polarity marking - bi-directional functionality confirmed by "B" suffix omission in part number variant (BZW04P28 vs. BZW04P28B); however, BZW04P28HE3/73 is functionally bi-directional per family specification and HE3 suffix denotes AEC-Q101 qualification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between leads; either terminal serves as input/output for transient energy diversion in both polarities. |
| Lead 1 (Anode end) | Terminal connection | Matte tin-plated, 0.023–0.026" diameter; supports wave/solder reflow per JESD22-B106 (275 °C, 10 s max). |
| Lead 2 (Cathode end) | Terminal connection | Identical to Lead 1; no color band or marking required for bi-directional types per datasheet Note on polarity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| 400 W peak pulse power | Enables single-device protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V systems without external series impedance. |
| Glass passivated junction | Ensures long-term parameter stability and low leakage (<1 µA at VWM) across temperature and lifetime. |
| Low clamping ratio (VC/VBR) | ~1.45 (45.7 V / 31.4 V) - Minimizes overvoltage overshoot during fast transients, reducing risk to downstream ICs. |
| RoHS-compliant & WEEE-aligned | HE3 suffix confirms compliance with Directive 2011/65/EU and WEEE 2002/96/EC; suitable for global automotive supply chains. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across signal line and ground, clamping surges within nanoseconds. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs by limiting voltage to ≤45.7 V during 10/1000 µs transients up to 8.8 A. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on 24 V DC input channels, absorbing inductive kickback without polarity constraints. Use Value: Eliminates need for dual unidirectional TVS devices; reduces BOM count while maintaining <1 µA leakage at 28.2 V operating voltage. |
| Telecom Line Interface | Consumer Appliance Power Supply |
Use Scenario: Shielding RS-485/RS-232 transceiver pins in base station equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary front-end protection element placed before series impedance and receiver IC, responding in <1 ns. Use Value: Withstands repetitive 400 W pulses at 0.01 % duty cycle, supporting telecom equipment reliability standards (GR-1089-CORE). |
Use Scenario: Protecting AC-DC converter secondary-side feedback and communication lines (e.g., optocoupler inputs) in smart home appliances. IC Role / Device Role / Timing Role: Secondary-side transient suppressor across isolated 5 V or 12 V rails, preventing false triggering of safety shutdown circuits. Use Value: AEC-Q101 qualification ensures extended thermal cycling endurance (>1000 cycles) in thermally stressed appliance environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A-E3/52 | Unidirectional; 28 V VWM, 45.4 V VC @ 8.8 A; SMB package (surface-mount) | Requires polarity-aware layout; unsuitable for AC-coupled or floating signal lines where bi-directionality is mandatory. | Select when board space is constrained and unidirectional protection suffices with explicit cathode orientation. |
| 1.5KE27CA | Through-hole; 27 V VWM, 43.0 V VC @ 9.3 A; higher IPPM but larger DO-201AD package and no AEC-Q101 qualification. | Lacks automotive qualification; not recommended for Tier-1 automotive designs requiring PPAP documentation. | Choose for cost-sensitive industrial power supplies where AEC-Q101 is unnecessary and PCB real estate allows larger footprint. |
Compared with SMBJ28A-E3/52 and 1.5KE27CA, the BZW04P28HE3/73 uniquely combines AEC-Q101 qualification, bi-directional symmetry, DO-41 through-hole compatibility, and verified 175 °C operation - making it the only option among the three qualified for under-hood automotive sensor nodes requiring zero-polarity-installation and high-temperature resilience.
Availability
BZW04P28HE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance power management requiring stable component supply and long-lifecycle support.
Supply support for BZW04P28HE3/73 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The BZW04P series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and precise clamping performance are mandatory.
FAQ
What does the "HE3" suffix indicate in BZW04P28HE3/73?
The HE3 suffix in BZW04P28HE3/73 specifies RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. It distinguishes this automotive-grade variant from commercial-grade E3-suffix parts, confirming suitability for automotive electronics per Vishay's mechanical data section and ordering information table.
Is BZW04P28HE3/73 bi-directional or uni-directional?
BZW04P28HE3/73 is bi-directional. Although the part number omits the "B" suffix (e.g., BZW04P28B), the datasheet explicitly states that all BZW04P-xx parts - including BZW04P28 - are available in both uni- and bi-directional versions, and the HE3 suffix correlates with AEC-Q101-qualified bi-directional variants used in automotive sensor protection per typical applications and mechanical notes.
What is the maximum clamping voltage of BZW04P28HE3/73 under surge conditions?
The maximum clamping voltage (VC) of BZW04P28HE3/73 is 45.7 V at 8.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Can BZW04P28HE3/73 replace BZW04P28B in a design?
Yes - BZW04P28HE3/73 is functionally equivalent to BZW04P28B in electrical and bi-directional behavior, with identical VWM, VBR, VC, and IPPM. The HE3 suffix adds AEC-Q101 qualification and Class 2 whisker resistance, making it a drop-in upgrade for automotive applications where BZW04P28B was previously used.
What is the junction-to-ambient thermal resistance (RθJA) for BZW04P28HE3/73?
Vishay does not specify RθJA for BZW04P28HE3/73 in the provided datasheet. Instead, thermal performance is characterized via power derating curves (Fig. 5) and maximum junction temperature (175 °C). For PCB-level thermal design, users must apply the 1.5 W power dissipation rating at TL = 75 °C on an infinite heatsink, with linear derating above 25 °C ambient per Fig. 2.
BZW04P28HE3/73 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- 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)
BZW04P28HE3/73 FAQ
1.How can I place an order for BZW04P28HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P28HE3/73 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 BZW04P28HE3/73 reliable?
The price and inventory of BZW04P28HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P28HE3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P28HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P28HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P28HE3/73?
BZW04P28HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P28HE3/73 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 BZW04P28HE3/73?
For technical support, including BZW04P28HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P28HE3/73 requirements.
6.How does Aetrix verify that BZW04P28HE3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P28HE3/73 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 BZW04P28HE3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P28HE3/73?
All BZW04P28HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P28HE3/73, 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 BZW04P28HE3/73 part is unused and in its original packaging.
Return procedure for BZW04P28HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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