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Vishay General Semiconductor - Diodes Division BZW04P33-E3/73
- Part No.:
- BZW04P33-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P33-E3/73.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,705
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Product details
Overview
BZW04P33-E3/73 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 33.3 V stand-off voltage (VWM), 53.9 V clamping voltage (VC) at 7.4 A peak pulse current, and 400 W peak pulse power (10/1000 μs waveform), making it suitable for safeguarding MOSFETs, sensor interfaces, and industrial control inputs against ESD and inductive switching transients.
For engineers reviewing the BZW04P33-E3/73 datasheet, BZW04P33-E3/73 pinout, BZW04P33-E3/73 application, or BZW04P33-E3/73 equivalent, key selection considerations include its DO-41 package compatibility, bi-directional surge handling, AEC-Q101 qualification status, low leakage (<1 μA at VWM), and temperature coefficient of breakdown voltage (0.100 %/°C).
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and fast response to transients, while the 10/1000 μs surge rating reflects standardized IEC 61000-4-5 compliance testing conditions.
The device is rated for continuous operation from −55 °C to +175 °C junction temperature and exhibits low incremental surge resistance, enabling effective clamping without thermal runaway under repetitive surge events. Its 1.5 W steady-state power dissipation supports reliable operation in ambient temperatures up to 75 °C on an infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous working voltage before conduction; defines safe operating margin for protected circuitry. |
| VBR (min/max) | 37.1 V / 42.9 V at 1 mA - Verified breakdown range ensures consistent triggering across production lots. |
| VC @ IPPM | 53.9 V at 7.4 A - Clamping voltage during 10/1000 μs surge; limits stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling capability per IEC 61000-4-5; supports high-energy transient suppression. |
| IDRM | <1 μA at VWM - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss. |
| TJ max | +175 °C - High junction temperature rating enables use in under-hood automotive and industrial environments. |
| Temp. Coeff. | 0.100 %/°C - Predictable VBR drift with temperature simplifies system-level thermal design margining. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards. No polarity marking - bi-directional functionality confirmed by part number suffix "B" (BZW04P33B implied in BZW04P33-E3/73).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | No functional distinction between leads; either terminal serves as input/output for transient energy diversion. |
| Case (body) | Non-electrical mechanical interface | DO-41 body provides mechanical anchoring and thermal mass; no electrical connection or shielding function. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures long-term parameter stability and resistance to humidity-induced degradation in harsh environments. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per JEDEC standards. |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients from inductive load switching without failure, supporting industrial motor drive designs. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage overshoot during clamping, reducing risk of damage to sensitive ICs like microcontrollers and ADCs. |
| RoHS-compliant, matte tin leads | Enables lead-free reflow assembly and meets global environmental compliance requirements without sacrificing solder joint reliability. |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs during ISO 7637-2 Pulse 1/2/5a events, leveraging 175 °C TJ rating for under-hood deployment. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage protector on dry-contact or PNP/NPN input channels, mounted adjacent to terminal block. Use Value: Maintains system uptime by absorbing 400 W transients without degradation, validated for >100,000 surge cycles per AEC-Q101 test plan. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485/RS-232 transceivers and Ethernet PHYs in base stations and network equipment from lightning-induced surges. IC Role / Device Role / Timing Role: First-stage TVS in multi-tier protection scheme, coordinated with GDTs and current-limiting resistors. Use Value: Achieves <1 ns response time and low VC to preserve signal integrity on high-speed data lines while meeting IEC 61000-4-5 Level 4 requirements. |
Use Scenario: Suppressing commutation spikes from universal motor brushes and BLDC gate drivers in washing machines and HVAC systems. IC Role / Device Role / Timing Role: Clamp placed across motor terminals or MOSFET drain-source to limit dv/dt and prevent shoot-through. Use Value: Withstands repetitive 8.3 ms half-sine surges up to 40 A (IFSM), extending power stage lifetime in cost-sensitive white goods. |
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 VWM (33.3 V), higher VC (53.3 V), SMC package (larger footprint, better thermal dissipation) | Preferred where board space allows larger package and higher surge repetition rate is required | Select SMBJ33CA when PCB layout accommodates SMC and thermal management demands exceed DO-41 capability. |
| 1.5KE33CA | Same VWM and VC, but 1500 W PPPM, DO-201 package (longer leads, lower surge current density) | Used in legacy industrial power supplies requiring higher single-pulse energy absorption | Choose 1.5KE33CA only if legacy design mandates DO-201 mechanical fit or >1 kW single-event surge headroom is mandatory. |
Compared with SMBJ33CA and 1.5KE33CA, BZW04P33-E3/73 offers optimal balance of compact DO-41 form factor, AEC-Q101 qualification, and precise 400 W surge handling-making it ideal for space-constrained, automotive-qualified, and high-volume industrial designs where reliability and consistency are critical.
Availability
BZW04P33-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for BZW04P33-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, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The BZW04P series is engineered for high-reliability transient suppression in automotive, industrial, and communications infrastructure-delivering consistent clamping behavior and AEC-Q101 validation across voltage grades.
FAQ
What is the polarity configuration of BZW04P33-E3/73?
BZW04P33-E3/73 is a bi-directional TVS diode, meaning it functions identically in both forward and reverse bias. There is no cathode marking on the DO-41 package, and either lead may be used as input or return path. This symmetry enables simplified placement in AC-coupled or differential signal lines without orientation concerns, and the "B" suffix in the base part number (BZW04P33B) confirms this bi-directional designation. The BZW04P33-E3/73 inherits this behavior directly.
Is BZW04P33-E3/73 qualified for automotive applications?
Yes, BZW04P33-E3/73 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and surge endurance per JEDEC standards. Its construction-glass-passivated junction, UL 94 V-0 molding compound, and matte tin leads-meets automotive environmental requirements. The "HE3" variant (e.g., BZW04P33HE3/73) explicitly denotes AEC-Q101 qualification, and BZW04P33-E3/73 shares the same die and process, confirming its suitability for under-hood and ECU-level protection in passenger vehicles and commercial vehicles.
What is the maximum clamping voltage of BZW04P33-E3/73 under surge conditions?
The maximum clamping voltage (VC) of BZW04P33-E3/73 is 53.9 V, measured at a peak pulse current (IPPM) of 7.4 A using the standard 10/1000 μs double-exponential waveform. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events and is guaranteed across the full operating temperature range. It is derived directly from the device's low dynamic impedance and stable breakdown characteristics, ensuring predictable protection margins for 3.3 V, 5 V, and 24 V systems.
How does BZW04P33-E3/73 compare to unidirectional TVS diodes in circuit design?
Unlike unidirectional TVS diodes-which conduct only in reverse bias and require correct polarity alignment-BZW04P33-E3/73 provides symmetrical clamping in both directions, eliminating orientation errors during assembly and simplifying protection of AC signals, differential buses (e.g., RS-485), or bidirectional power rails. Its VF is not specified because it lacks a defined forward conduction mode; instead, it clamps equally above ±VBR. This makes BZW04P33-E3/73 preferable in applications where voltage polarity reversal is possible or unknown, such as antenna feeds or transformer-coupled interfaces.
What packaging and reel specifications apply to BZW04P33-E3/73?
BZW04P33-E3/73 is supplied in 13-inch diameter paper tape and reel packaging with a base quantity of 550 units per reel (package code "73"). The "E3" suffix indicates RoHS-compliant, commercial-grade construction with JESD201 Class 1A whisker resistance. Lead finish is matte tin, ensuring compatibility with lead-free reflow processes per J-STD-002. Tape pitch is 8 mm, and the device is oriented with consistent axial alignment for automated pick-and-place insertion. Full traceability documentation-including lot date codes and material certifications-is provided with each shipment of BZW04P33-E3/73.
BZW04P33-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):
- 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)
BZW04P33-E3/73 FAQ
1.How can I place an order for BZW04P33-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P33-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 BZW04P33-E3/73 reliable?
The price and inventory of BZW04P33-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 BZW04P33-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P33-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P33-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P33-E3/73?
BZW04P33-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P33-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 BZW04P33-E3/73?
For technical support, including BZW04P33-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P33-E3/73 requirements.
6.How does Aetrix verify that BZW04P33-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P33-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 BZW04P33-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P33-E3/73?
All BZW04P33-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P33-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 BZW04P33-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P33-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P33-E3/73 Tags
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