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Vishay General Semiconductor - Diodes Division BZW04P33B-E3/54
- Part No.:
- BZW04P33B-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P33B-E3/54.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,927
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Product details
Overview
BZW04P33B-E3/54 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 (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-E3/54 datasheet, BZW04P33B-E3/54 pinout, BZW04P33B-E3/54 application, or BZW04P33B-E3/54 equivalent, key selection criteria include its DO-204AL (DO-41) axial package, AEC-Q101 qualification, bi-directional symmetry, low 0.1 % duty cycle rating, and verified clamping performance under repetitive transients.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 37.1–42.9 V (min/max) under 1 mA test current. Its junction exhibits low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device is rated for 175 °C maximum junction temperature and derates linearly above 25 °C ambient per Fig. 2; it supports 1.5 W steady-state power dissipation on infinite heatsink at 75 °C lead temperature and complies with ANSI/IEEE C62.35 surge current definitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR (min/max) | 37.1 V / 42.9 V at 1 mA - Ensures reliable turn-on across process variation and temperature; guarantees clamping activation within defined window. |
| VC @ IPPM | 53.9 V at 7.4 A (10/1000 μs) - Peak clamped voltage seen by protected circuit; limits stress on downstream ICs like microcontrollers or RS-485 transceivers. |
| PPPM | 400 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure; validated at 0.01 % duty cycle. |
| ID @ VWM | 1.0 μA - Ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes and low-power IoT devices. |
| Package | DO-204AL (DO-41) - Axial-leaded, RoHS-compliant epoxy package with matte tin-plated leads; compatible with wave and reflow soldering (275 °C/10 s max). |
| Qualification | AEC-Q101 qualified - Validated for automotive under-hood and chassis applications requiring reliability under thermal cycling, humidity, and mechanical shock. |
Pinout & Package
DO-204AL (DO-41) axial package: hermetically sealed glass-passivated silicon junction in molded UL 94 V-0 epoxy case; no polarity marking - symmetrical bi-directional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bi-directional avalanche junction | No functional distinction between leads; either terminal serves as cathode or anode depending on transient polarity - enables single-component protection of AC or floating DC lines. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, low-leakage avalanche behavior over lifetime and temperature; eliminates surface degradation risks in humid environments. |
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy surges common in automotive load-dump and industrial motor drive noise without parametric shift or failure. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock - suitable for Tier-1 ECU and ADAS sensor modules. |
| Bi-directional symmetry | Eliminates need for polarity-aware layout; protects bidirectional buses (e.g., CAN, LIN, I²C) and AC-coupled analog signals with one device. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during transient events - critical for safeguarding 3.3 V or 5 V logic interfaces adjacent to protected lines. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and engine crankshaft position sensors from ISO 7637-2 coupled transients and ESD. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning amplifier or MCU ADC input. Use Value: Maintains signal fidelity under 100 V/μs transients while limiting clamped voltage to ≤54 V - preserving sensor accuracy and preventing latch-up in downstream ASICs. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff protector on dry-contact or optocoupler input stage, absorbing repetitive 400 W pulses without degradation over 10⁵ cycles. Use Value: Enables >10-year field life in factory automation with zero maintenance; eliminates need for external spark gaps or varistors in compact DIN-rail modules. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485/RS-232 data lines in base station remote units from lightning-induced common-mode surges on long cable runs. IC Role / Device Role / Timing Role: First-line defense in hybrid protection scheme - paired with GDT or polymer PTC to handle bulk energy while BZW04P33B-E3/54 provides fast, low-clamp precision. Use Value: Achieves <1 ns response and sub-54 V clamping to prevent damage to isolated transceivers (e.g., ADM2483) and maintain bit-error-rate compliance. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role / Timing Role: Parallel-connected across motor terminals or H-bridge outputs to clamp flyback spikes up to ±100 V during PWM commutation. Use Value: Prevents MCU reset or flash corruption caused by conducted transients; certified to IEC 61000-4-4 Level 4 (4 kV EFT) when used with proper PCB layout. |
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 (SMB) package; higher 600 W PPPM but larger footprint and 57.5 V VC at 6.4 A - less precise clamping than BZW04P33B-E3/54's 53.9 V at 7.4 A. | Preferred where board space allows SMB and higher surge margin is needed; not drop-in due to different package and thermal profile. | Select SMBJ33CA only if system-level testing confirms acceptable clamping margin and thermal management supports SMB footprint. |
| P6KE33CA | DO-15 package; identical 33.3 V VWM and 53.9 V VC, but lower 600 W PPPM rating limited to non-repetitive use - lacks AEC-Q101 qualification and 0.01 % duty cycle validation. | Suitable for cost-sensitive consumer products without automotive or industrial reliability requirements. | Choose P6KE33CA for non-automotive applications where AEC-Q101 is not mandated and surge repetition rate is low. |
Compared with SMBJ33CA and P6KE33CA, BZW04P33B-E3/54 delivers tighter clamping voltage, AEC-Q101 validation, and proven repetitive surge endurance in DO-41 - making it optimal for space-constrained, high-reliability automotive and industrial designs where axial mounting and legacy footprint compatibility matter.
Availability
BZW04P33B-E3/54 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for BZW04P33B-E3/54 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 platform engineered for high-energy, fast-response transient suppression in harsh environments - targeting automotive, industrial control, and communications infrastructure.
FAQ
What is the maximum clamping voltage of BZW04P33B-E3/54 under standard test conditions?
The BZW04P33B-E3/54 has a maximum clamping voltage (VC) of 53.9 V when subjected to a 10/1000 μs peak pulse current of 7.4 A at TA = 25 °C. This value is measured per ANSI/IEEE C62.35 and reflects worst-case voltage seen by protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is BZW04P33B-E3/54 suitable for automotive applications?
Yes, BZW04P33B-E3/54 is AEC-Q101 qualified and specifically designed for automotive use. It meets stringent requirements for temperature cycling, humidity resistance, and mechanical shock, and is commonly deployed in engine control units, body electronics, and ADAS sensor modules where reliability under extended temperature range (−55 °C to +175 °C) is mandatory.
Does BZW04P33B-E3/54 have polarity markings on the package?
No, BZW04P33B-E3/54 is a bi-directional TVS diode in DO-204AL (DO-41) package and carries no polarity marking. Its symmetrical construction means either lead functions identically - simplifying layout and eliminating orientation errors during automated assembly or manual replacement.
What is the standoff voltage (VWM) and why is it important for BZW04P33B-E3/54?
The standoff voltage (VWM) of BZW04P33B-E3/54 is 33.3 V - the maximum DC or RMS voltage the device can withstand continuously without entering avalanche conduction. This parameter ensures reliable operation in 24 V nominal systems while providing sufficient margin above normal operating voltage to avoid false triggering during ripple or transients.
How does the junction temperature rating affect thermal design for BZW04P33B-E3/54?
BZW04P33B-E3/54 has a maximum junction temperature (TJ) of 175 °C and derates linearly above 25 °C ambient per Figure 2 in the datasheet. For sustained power dissipation, designers must ensure PCB copper area, airflow, or heatsinking maintains TJ ≤175 °C - especially critical in enclosed automotive enclosures or high-density industrial modules where ambient may exceed 85 °C.
BZW04P33B-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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-E3/54 FAQ
1.How can I place an order for BZW04P33B-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P33B-E3/54 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-E3/54 reliable?
The price and inventory of BZW04P33B-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P33B-E3/54 is usually 5 days.
3.What payment methods are accepted for BZW04P33B-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P33B-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P33B-E3/54?
BZW04P33B-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P33B-E3/54 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-E3/54?
For technical support, including BZW04P33B-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P33B-E3/54 requirements.
6.How does Aetrix verify that BZW04P33B-E3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04P33B-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of BZW04P33B-E3/54?
All BZW04P33B-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P33B-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for BZW04P33B-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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