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Vishay General Semiconductor - Diodes Division BZW04P28BHE3/73
- Part No.:
- BZW04P28BHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P28BHE3/73.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO204AL
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BZW04P28BHE3/73 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 (PPPM) with 10/1000 μs waveform - ideal for safeguarding MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial control systems.
For engineers reviewing the BZW04P28BHE3/73 datasheet, BZW04P28BHE3/73 pinout, BZW04P28BHE3/73 application, or BZW04P28BHE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, DO-204AL (DO-41) package, bi-directional symmetry, low clamping ratio (VC/VWM = 1.62), and temperature coefficient of breakdown voltage (0.098 %/°C).
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with identical electrical characteristics forward and reverse - enabling single-device protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive 10/1000 μs transients.
Designed for high-reliability environments, BZW04P28BHE3/73 meets AEC-Q101 stress testing requirements and supports operation from –55 °C to +175 °C junction temperature. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification, distinguishing it from commercial-grade E3 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.2 V - maximum continuous working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VC @ IPPM | 45.7 V at 8.8 A - clamping voltage limits downstream device stress during 10/1000 μs surge; enables reliable protection of 36 V-rated components. |
| PPPM | 400 W - peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity. |
| VBR min/max | 31.4 V / 36.3 V at 1 mA - tight breakdown tolerance ensures predictable turn-on; critical for consistent system-level surge margin. |
| TJ max | +175 °C - extended junction temperature rating allows use in under-hood automotive and high-ambient industrial environments. |
| Package | DO-204AL (DO-41) - axial-leaded through-hole package with matte tin-plated leads; compatible with standard wave-solder and hand-solder processes. |
| Qualification | AEC-Q101 qualified - validated for automotive electronics reliability including HTOL, TC, UHAST, and bond strength testing. |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, molded epoxy case with glass-passivated chip. No polarity marking - bi-directional symmetry means either lead functions identically as anode or cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; no fixed polarity - enables protection of AC signals, differential buses, or ungrounded nodes without orientation constraints. |
| Leads (matte tin plated) | PCB interconnect & thermal path | Solderable per J-STD-002/JESD22-B102; supports 275 °C solder dip (10 s); JESD201 class 2 whisker resistance (HE3 suffix). |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping symmetry | Identical VBR, VC, and IPPM in both directions - eliminates need for dual-diode configurations in AC or floating circuits. |
| 400 W peak pulse power (10/1000 μs) | Withstands repeated surges up to 400 W without degradation - suitable for industrial motor drive I/O and automotive load-dump scenarios. |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and high-temperature operating life. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage overshoot during clamping - preserves margin for downstream 48 V tolerant components. |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load dump and battery reversal transients in vehicle door modules. IC Role / Device Role / Timing Role: Standby-mode bidirectional clamp that remains non-conductive below 28.2 V and responds within <1 ns to divert >1 kV spikes. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic while maintaining signal integrity during normal operation due to <1 μA leakage at VWM. | Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges and ground potential differences. IC Role / Device Role / Timing Role: Primary overvoltage shunt element placed across input terminals to clamp transients before they reach precision op-amps and ADC front-ends. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards without adding series impedance or signal distortion. |
| Automotive HVAC Sensor Interface | Telecom Power Supply Input Stage |
Use Scenario: Shielding NTC thermistor and pressure sensor signal lines in heating, ventilation, and air conditioning subsystems from ignition noise and relay switching spikes. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF typical) bi-directional protector placed directly at connector entry point to minimize stub length and inductance. Use Value: Maintains sensor accuracy by avoiding DC loading (ID < 1 μA at VWM) while delivering sub-50 V clamping during fast-rising transients. | Use Scenario: Front-end transient suppression on 24 V DC input rails of telecom remote radio units subject to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-line energy diversion device upstream of DC/DC converters and LDOs, rated for repetitive 400 W pulses at 0.01 % duty cycle. Use Value: Extends system uptime by preventing converter shutdown or MOSFET failure during multi-event surge exposure in harsh outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA | DO-214AA (SMB) package; 28 V VWM; 45.4 V VC @ 8.8 A; same PPPM (400 W); AEC-Q101 qualified. | Surface-mount alternative requiring PCB redesign; lower profile but higher thermal resistance than DO-41. | Select SMBJ28CA when space-constrained SMT layout is required and board-level thermal management supports SMB footprint. |
| P6KE27CA | DO-15 package; 27 V VWM; 45.0 V VC @ 8.8 A; 600 W PPPM (10/1000 μs); commercial grade only (not AEC-Q101). | Higher pulse power but lacks automotive qualification; larger DO-15 body increases board area vs. DO-41. | Select P6KE27CA for cost-sensitive industrial applications where AEC-Q101 is not mandated and higher surge headroom is beneficial. |
Compared with BZW04P28BHE3/73, SMBJ28CA offers identical electrical protection in a surface-mount form factor but requires layout adaptation, while P6KE27CA delivers greater surge capacity in a larger through-hole package without automotive qualification - making BZW04P28BHE3/73 the optimal choice for AEC-Q101-compliant, space-efficient, axial-leaded designs.
Availability
BZW04P28BHE3/73 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC analog I/O protection, and telecom power supply input stages requiring stable component supply, AEC-Q101 traceability, and long-lifecycle support.
Supply support for BZW04P28BHE3/73 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, efficiency, and application-specific optimization.
The BZW04P series belongs to Vishay's TransZorb® TVS family, engineered specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and precise clamping performance are mandatory.
FAQ
What is the clamping voltage of BZW04P28BHE3/73 and how does it protect downstream circuitry?
The BZW04P28BHE3/73 has a maximum clamping voltage (VC) of 45.7 V at 8.8 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a surge event. By limiting transient overvoltage to ≤45.7 V, the BZW04P28BHE3/73 prevents damage to downstream components rated for 48 V or less - such as automotive microcontrollers, analog front-ends, and interface ICs - while maintaining low leakage (<1 μA) during normal operation at 28.2 V stand-off voltage.
Is BZW04P28BHE3/73 suitable for automotive applications, and what qualification does it hold?
Yes, BZW04P28BHE3/73 is explicitly qualified to AEC-Q101 for automotive use. The "HE3" suffix denotes RoHS compliance and full AEC-Q101 stress testing - including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. This makes BZW04P28BHE3/73 appropriate for under-hood and cabin applications such as body control modules, HVAC sensors, and lighting drivers where reliability under thermal and mechanical stress is critical.
How does the bi-directional nature of BZW04P28BHE3/73 affect its placement and functionality in a circuit?
The bi-directional design of BZW04P28BHE3/73 means it provides symmetrical clamping in both polarities - eliminating polarity marking and allowing installation in either orientation. This is especially valuable for protecting AC-coupled signals, differential buses (e.g., LIN, CAN physical layer), or floating nodes where voltage reversals occur. Unlike uni-directional TVS diodes, BZW04P28BHE3/73 avoids unintended forward conduction during negative transients, ensuring consistent protection without additional components or layout constraints.
What is the junction temperature range and thermal derating behavior of BZW04P28BHE3/73?
BZW04P28BHE3/73 operates across a junction temperature range of –55 °C to +175 °C. Its peak pulse power (PPPM) is derated linearly above 25 °C ambient, following the curve in Figure 2 of the Vishay datasheet (Document Number: 88316). At 125 °C case temperature, PPPM drops to approximately 50 % of the rated 400 W. This derating must be accounted for in high-ambient designs - such as engine bay electronics - where thermal management (e.g., copper pour, airflow) directly impacts surge survivability.
Can BZW04P28BHE3/73 be used in parallel to increase surge current handling?
No - BZW04P28BHE3/73 should not be paralleled for increased current handling. Minor VBR tolerances (31.4–36.3 V) cause uneven current sharing during transients, leading to thermal runaway in the lower-breakdown unit. For higher IPPM requirements, select a single higher-rated device (e.g., BZW04P33BHE3/73 or BZW04P37BHE3/73) or implement coordinated staged protection with upstream fusing and downstream TVS devices. Parallel use voids AEC-Q101 qualification and violates Vishay's recommended application practices.
BZW04P28BHE3/73 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):
- 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)
BZW04P28BHE3/73 FAQ
1.How can I place an order for BZW04P28BHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P28BHE3/73 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 BZW04P28BHE3/73 reliable?
The price and inventory of BZW04P28BHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P28BHE3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P28BHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P28BHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P28BHE3/73?
BZW04P28BHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P28BHE3/73 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 BZW04P28BHE3/73?
For technical support, including BZW04P28BHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P28BHE3/73 requirements.
6.How does Aetrix verify that BZW04P28BHE3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P28BHE3/73 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 BZW04P28BHE3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P28BHE3/73?
All BZW04P28BHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P28BHE3/73, 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 BZW04P28BHE3/73 part is unused and in its original packaging.
Return procedure for BZW04P28BHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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