My Inquiry
My Account
Vishay General Semiconductor - Diodes Division BZW04P28-E3/73
- Part No.:
- BZW04P28-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P28-E3/73.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,182
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZW04P28-E3/73 from Vishay General Semiconductor is a bi-directional TransZorb® transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power lines and signal paths. It features a 28.2 V stand-off voltage (VWM), 31.4–36.3 V breakdown voltage (VBR), 45.7 V clamping voltage (VC) at 8.8 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - suitable for automotive and industrial electronics subject to load dump or ESD transients.
For engineers reviewing the BZW04P28-E3/73 datasheet, BZW04P28-E3/73 pinout, BZW04P28-E3/73 application, or BZW04P28-E3/73 equivalent, key selection criteria include its DO-41 package compatibility, AEC-Q101 qualification, bi-directional clamping symmetry, low leakage (<1 μA at VWM), and precise clamping performance under repetitive surge conditions.
Technical Context
This bi-directional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of fast-rising transients such as ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4). Its symmetrical I-V characteristics in both polarities ensure consistent clamping regardless of transient polarity.
The device operates across –55 °C to +175 °C junction temperature range and is rated for 400 W peak pulse power (10/1000 μs), with derating above 25 °C per Figure 2. It meets JESD22-B106 solderability standards and JESD201 Class 1A whisker resistance (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 31.4–36.3 V at 1 mA - sharp avalanche onset ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 45.7 V at 8.8 A IPPM - limits downstream voltage stress during 10/1000 μs surge, protecting connected ICs/MOSFETs |
| PPPM (Peak Pulse Power) | 400 W - sustains high-energy transients without failure, validated per 10/1000 μs waveform with 0.01% duty cycle |
| ID (Reverse Leakage) | <1 μA at 28.2 V - negligible standby power loss and minimal impact on high-impedance circuits |
| TJ max. | +175 °C - supports under-hood automotive and high-temperature industrial environments |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
Pinout & Package
Package: DO-204AL (DO-41), axial lead, 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) | Transient conduction path | No polarity marking; symmetric terminals conduct equally in either direction during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable avalanche behavior and long-term reliability under repeated surge stress |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients from inductive switching (e.g., solenoid drivers, motor controllers) |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Bi-directional configuration | Protects AC-coupled or floating signal lines and bidirectional data buses without polarity concerns |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected devices |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN/LIN bus nodes and microcontroller power rails against load dump (ISO 7637-2 Pulse 5a) and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping device placed at board-level input filter stage to limit transient voltage before LDOs or DC-DC converters. Use Value: Clamps to 45.7 V at 8.8 A, ensuring downstream 3.3 V/5 V logic remains within safe operating area during 100 V/100 ms load dump events. |
Use Scenario: Safeguarding analog front-end inputs of pressure, temperature, or current sensors in PLC I/O modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Secondary protection element after series impedance, shunting fast transients before precision amplifier inputs. Use Value: Sub-1 μA leakage at 28.2 V prevents signal offset drift; bi-directional symmetry accommodates differential sensor outputs without polarity constraints. |
| Telecom DC Feeder Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered Ethernet switch ports and remote PHY circuitry from lightning-induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: First-line TVS on DC input rail upstream of DC-DC isolation stage and hot-swap controller. Use Value: 400 W rating handles multi-kV induced surges; DO-41 package allows manual rework and fits legacy telecom board layouts. |
Use Scenario: Suppressing commutation spikes from universal motor brushes and relay coils in washing machines, vacuum cleaners, and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-mounted across inductive loads to clamp flyback voltage and reduce EMI generation. Use Value: 175 °C max junction temperature withstands enclosure heat buildup; glass passivation ensures stability after thousands of surge cycles. |
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; 400 W PPPM; slightly higher VC (48.4 V at 8.3 A) | Surface-mount alternative requiring PCB redesign; better thermal dissipation in high-density layouts | Select SMBJ28CA when automated SMT assembly and space-constrained designs outweigh through-hole serviceability needs. |
| P6KE27CA | DO-15 package; 27 V VWM; 600 W PPPM; higher clamping (45.7 V at 13.1 A); no AEC-Q101 qualification | Higher energy handling but broader tolerance and non-automotive grade; suited for cost-sensitive industrial use | Choose P6KE27CA for non-automotive applications where higher surge margin compensates for lack of automotive qualification. |
Compared with BZW04P28-E3/73, SMBJ28CA offers SMT compatibility at the cost of through-hole serviceability, while P6KE27CA delivers greater surge capacity without AEC-Q101 validation - making BZW04P28-E3/73 the optimal choice for automotive and high-reliability through-hole deployments requiring certified robustness.
Availability
BZW04P28-E3/73 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power feeds, and appliance motor controls requiring stable component supply across extended production lifecycles.
Supply support for BZW04P28-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, 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 harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience is critical.
FAQ
What is the clamping voltage of BZW04P28-E3/73 under standard test conditions?
The BZW04P28-E3/73 has a maximum clamping voltage (VC) of 45.7 V at 8.8 A peak pulse current (IPPM), measured using the standardized 10/1000 μs double-exponential waveform. This value ensures that protected downstream components experience no more than 45.7 V during surge events, preserving functional safety margins for 3.3 V, 5 V, and 24 V systems. The clamping performance is verified across the full operating temperature range.
Is BZW04P28-E3/73 suitable for automotive applications?
Yes, BZW04P28-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction - including glass-passivated junction, DO-41 package with matte tin leads, and operation up to +175 °C junction temperature - meets stringent automotive reliability requirements. It is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces for ISO 7637-2 and ISO 16750-2 transient immunity.
Does BZW04P28-E3/73 have polarity markings?
No, BZW04P28-E3/73 is a bi-directional TVS diode and carries no polarity marking. As confirmed in the Vishay datasheet (Document 88316), bi-directional types like BZW04P28-E3/73 feature symmetrical electrical characteristics in both directions and are unmarked - unlike uni-directional variants which use a cathode band. This enables flexible placement in AC-coupled or floating circuits without orientation constraints.
What is the maximum reverse leakage current for BZW04P28-E3/73 at its stand-off voltage?
The maximum reverse leakage current (ID) for BZW04P28-E3/73 is less than 1 μA at its 28.2 V stand-off voltage (VWM), tested at TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in battery-operated systems - a key advantage over higher-leakage alternatives in precision analog or low-power IoT applications.
Can BZW04P28-E3/73 be used in place of uni-directional TVS diodes?
BZW04P28-E3/73 is bi-directional and should not replace uni-directional TVS diodes in circuits requiring DC blocking or asymmetric clamping - such as those protecting forward-biased rectifier outputs or single-polarity power rails with strict polarity dependence. However, it can substitute uni-directional parts in AC-coupled, differential, or floating applications where polarity independence is beneficial, provided VWM, VC, and PPPM specifications meet design requirements.
BZW04P28-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04P28-E3/73 FAQ
1.How can I place an order for BZW04P28-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P28-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 BZW04P28-E3/73 reliable?
The price and inventory of BZW04P28-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 BZW04P28-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P28-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P28-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P28-E3/73?
BZW04P28-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P28-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 BZW04P28-E3/73?
For technical support, including BZW04P28-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P28-E3/73 requirements.
6.How does Aetrix verify that BZW04P28-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P28-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 BZW04P28-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P28-E3/73?
All BZW04P28-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P28-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 BZW04P28-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P28-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P28-E3/73 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
