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Vishay General Semiconductor - Diodes Division BZW04P33B-E3/73
- Part No.:
- BZW04P33B-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P33B-E3/73.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,294
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Product details
Overview
BZW04P33B-E3/73 from Vishay General Semiconductor is a bi-directional TransZorb® transient voltage suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 33.3 V stand-off voltage (VWM), 53.9 V clamping voltage (VC) at 7.4 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the BZW04P33B-E3/73 datasheet, BZW04P33B-E3/73 pinout, BZW04P33B-E3/73 application, or BZW04P33B-E3/73 equivalent, key selection criteria include its bi-directional DO-204AL (DO-41) package, AEC-Q101 qualification, 175 °C max junction temperature, and verified clamping performance under repetitive 0.01% duty cycle transients.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, delivering consistent clamping behavior without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, critical for fast response to ESD and lightning-induced transients.
Rated for 400 W peak pulse power per 10/1000 µs waveform and derated above 25 °C ambient, it supports reliable operation up to 175 °C junction temperature. The device meets JESD22-B102 solderability standards and passes JESD201 Class 1A whisker testing (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33.3 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 37.1–42.9 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 53.9 V at 7.4 A IPPM - peak voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - energy-handling capacity for standardized 10/1000 µs transient; enables protection against IEC 61000-4-5 Level 3 surges. |
| ID (Reverse Leakage) | 1.0 µA at VWM - ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | 175 °C - extended thermal rating supports under-hood automotive and industrial environments without derating penalties. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: DO-204AL (DO-41), axial lead, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads, solderable per J-STD-002 and JESD22-B102. Bi-directional construction - no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between leads; interchangeable in PCB layout - simplifies routing and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable breakdown voltage and long-term reliability under thermal cycling and humidity stress. |
| 400 W peak pulse power (10/1000 µs) | Supports robust protection against high-energy transients common in industrial motor drives and automotive load-dump scenarios. |
| AEC-Q101 qualified | Validated for automotive electronics including engine control modules, body controllers, and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for sensitive CMOS inputs. |
| RoHS-compliant, matte tin leads | Ensures compatibility with lead-free reflow processes and eliminates whisker risk per JESD201 Class 1A. |
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 ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point to shunt surge energy before reaching ASIC or MCU. Use Value: Maintains 33.3 V stand-off while clamping to 53.9 V - preserving signal fidelity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers against induced surges from relay coil switching and nearby motor noise. IC Role / Device Role / Timing Role: Primary front-end TVS on 24 V DC input lines, coordinated with series impedance for IEC 61000-4-4/5 compliance. Use Value: 400 W PPPM rating handles repetitive 10/1000 µs transients without degradation - enabling maintenance-free operation over 10+ year industrial lifetimes. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485/RS-232 transceivers and Ethernet PHYs from lightning-induced surges on outdoor or building-entry cabling. IC Role / Device Role / Timing Role: First-stage protection device mounted adjacent to connector, working with GDT or polymer PTC for multi-stage coordination. Use Value: 175 °C TJ max and low leakage (<1 µA) ensure stable performance across wide ambient ranges (-40 °C to +85 °C) in unventilated enclosures. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Snubber-connected across motor terminals or flyback diode replacement for faster energy dissipation. Use Value: Bi-directional symmetry eliminates need for polarity-aware placement - reducing assembly errors and enabling single-BOM use across multiple motor variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Same DO-214AA package; 33 V VWM, 53.3 V VC at 7.5 A - nearly identical clamping, but lower 600 W PPPM rating and no AEC-Q101 qualification. | Preferred for cost-sensitive consumer designs where automotive qualification is unnecessary. | Select SMBJ33CA only if AEC-Q101 compliance is not required and board space allows SMB footprint. |
| 1.5KE33CA | Higher 1500 W PPPM, larger DO-201AD package, 53.3 V VC at 28.3 A - significantly higher surge capacity but slower response due to higher junction capacitance (~150 pF vs. ~50 pF). | Suitable for AC mains or high-energy industrial surge zones where speed is secondary to energy absorption. | Choose 1.5KE33CA when protecting high-voltage AC inputs or legacy systems requiring proven high-energy ruggedness. |
Compared with SMBJ33CA and 1.5KE33CA, BZW04P33B-E3/73 delivers AEC-Q101 assurance in a compact DO-41 form factor with optimized low-capacitance response - making it the preferred choice for space-constrained, automotive-grade signal-line protection where reliability and footprint are jointly critical.
Availability
BZW04P33B-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line surge suppression requiring stable component supply, long-lifecycle support, and AEC-Q101 traceability.
Supply support for BZW04P33B-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 is part of Vishay's TransZorb® TVS platform, engineered specifically for high-reliability bi-directional surge suppression in automotive, industrial, and telecom infrastructure where consistent clamping and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of BZW04P33B-E3/73 at its rated peak pulse current?
The BZW04P33B-E3/73 has a maximum clamping voltage (VC) of 53.9 V at 7.4 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is BZW04P33B-E3/73 suitable for automotive applications?
Yes, BZW04P33B-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use. Its 175 °C maximum junction temperature, glass-passivated junction, and validation across temperature cycling, HTRB, and ESD tests make it appropriate for engine bay sensors, body control modules, and ADAS interfaces where environmental robustness is essential.
Does BZW04P33B-E3/73 have polarity markings?
No, BZW04P33B-E3/73 is a bi-directional TVS diode and carries no polarity marking. Its symmetrical construction means either lead may serve as anode or cathode - eliminating orientation constraints during placement and reducing assembly errors in high-volume manufacturing.
What is the standoff voltage (VWM) and how does it relate to system design?
The standoff voltage (VWM) of BZW04P33B-E3/73 is 33.3 V - the maximum continuous reverse voltage the device tolerates without entering avalanche conduction. Designers must ensure this value exceeds the system's normal operating voltage (e.g., 24 V nominal bus) with sufficient margin (typically ≥10–15%) to prevent leakage-induced power loss or false triggering.
Can BZW04P33B-E3/73 be used in place of a unidirectional TVS like BZW04P33-E3/73?
No - BZW04P33B-E3/73 is bi-directional and lacks polarity marking, whereas BZW04P33-E3/73 is unidirectional with cathode banding. Substitution requires verifying circuit topology: bi-directional use is mandatory for AC-coupled or floating lines (e.g., differential buses); unidirectional is required where DC bias polarity is fixed and forward conduction must be blocked.
BZW04P33B-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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- 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)
BZW04P33B-E3/73 FAQ
1.How can I place an order for BZW04P33B-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P33B-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 BZW04P33B-E3/73 reliable?
The price and inventory of BZW04P33B-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 BZW04P33B-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P33B-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P33B-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P33B-E3/73?
BZW04P33B-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P33B-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 BZW04P33B-E3/73?
For technical support, including BZW04P33B-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P33B-E3/73 requirements.
6.How does Aetrix verify that BZW04P33B-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P33B-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 BZW04P33B-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P33B-E3/73?
All BZW04P33B-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P33B-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 BZW04P33B-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P33B-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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