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Vishay General Semiconductor - Diodes Division BZW04-33BHE3/73
- Part No.:
- BZW04-33BHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-33BHE3/73.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,518
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Product details
Overview
BZW04-33BHE3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on signal or power lines. It features 33.3 V standoff voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V clamping voltage (VC) at 7.4 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used in automotive sensor interface protection and industrial I/O line surge suppression.
For engineers reviewing the BZW04-33BHE3/73 datasheet, BZW04-33BHE3/73 pinout, BZW04-33BHE3/73 application, or BZW04-33BHE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-41 mechanical data, clamping performance under standardized surge conditions, and direct alternatives for bidirectional TVS selection in harsh-environment designs.
Technical Context
This device operates symmetrically in both directions, with identical VBR min/max, VC, and IPPM values across polarity - confirmed by bidirectional test data in the Vishay datasheet (Document Number: 88316). Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 μA at VWM), while the 0.100 %/°C temperature coefficient of VBR enables predictable clamping over -55 °C to +175 °C operating range.
The BZW04-33BHE3/73 complies with AEC-Q101 stress testing for automotive applications and meets JESD201 Class 2 whisker resistance. Its 1.5 W steady-state power dissipation and 400 W transient capability are defined per ANSI/IEEE C62.35 standards using 10/1000 μs waveform, with derating applied above 25 °C ambient per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - guaranteed breakdown onset range; ensures reliable triggering during fast transients without premature conduction. |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 10/1000 μs surge; limits downstream IC stress to <54 V under worst-case 400 W event. |
| PPPM | 400 W - peak pulse power handling per single 10/1000 μs transient; supports repetitive surges at 0.01 % duty cycle. |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage at rated standoff; preserves signal integrity and minimizes standby power loss. |
| TJ max. | +175 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD; suitable for ASIL-B supporting circuits. |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with matte tin-plated leads; compliant with UL 94 V-0 flammability rating and RoHS. Bidirectional construction means no polarity marking - both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical bidirectional clamping behavior; either terminal may connect to protected line or ground - no orientation dependency. |
| Case (lead frame) | Thermal and mechanical interface | Provides primary heat path to PCB copper; lead length ≥ 9.5 mm required for full 400 W rating per Fig. 6. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable breakdown voltage with minimal parameter drift over time and temperature. |
| 400 W 10/1000 μs pulse rating | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges without degradation when properly mounted. |
| AEC-Q101 qualification | Validates robustness for automotive powertrain, body electronics, and ADAS sensor interfaces requiring long-term field reliability. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive switch-off), improving protection margin for 3.3 V/5 V logic. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling and humidity, critical for high-reliability automotive and industrial deployments. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and chassis ground to shunt transients before reaching sensitive input stages. Use Value: Limits induced voltage to ≤53.9 V during 7.4 A surge, preserving integrity of 5 V tolerant receivers and preventing latch-up in microcontrollers. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field wiring surges and lightning-induced coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series impedance and filtering to meet IEC 61000-4-5 surge immunity requirements. Use Value: Maintains signal fidelity below 33.3 V normal operation while clamping 1 kV/0.5 kA surges to safe levels compatible with 16-bit ADC reference rails. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHY interfaces and DSL line drivers from induced surges on external cabling in network edge equipment. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after gas discharge tube (GDT) or polymer PTC, providing fast-response clamping for residual transients. Use Value: Responds in <1 ps to limit let-through voltage to <54 V, protecting 2.5 V/3.3 V PHY transceivers without adding capacitance that degrades signal integrity. |
Use Scenario: Suppressing commutation spikes from brushed DC motors and solenoids in washing machines, HVAC actuators, and power tools. IC Role / Device Role / Timing Role: Across-the-line suppressor connected in parallel with motor windings to absorb inductive kickback energy. Use Value: Handles repetitive 400 W pulses at 0.01 % duty cycle, enabling reliable operation over 10,000+ motor cycles without parameter shift or failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Same VWM (33.3 V), but SMC package (DO-214AB); 600 W PPPM rating; higher VC (64.5 V at 6.2 A). | Higher power handling but larger footprint; less suitable for space-constrained DO-41 legacy layouts. | Select SMBJ33CA only if board area allows SMC and system requires >400 W surge margin. |
| P6KE33CA | Same DO-41 package and VWM; lower PPPM (600 W), higher VC (53.3 V at 11.3 A); not AEC-Q101 qualified. | Lacks automotive qualification; acceptable for commercial industrial use but not for automotive Tier-1 supply chains. | Choose P6KE33CA for cost-sensitive non-automotive applications where AEC-Q101 is not mandated. |
Compared with BZW04-33BHE3/73, SMBJ33CA offers higher surge capacity in a larger package, while P6KE33CA matches form factor but omits automotive qualification and exhibits different clamping dynamics - making BZW04-33BHE3/73 the optimal choice for AEC-Q101-compliant, space-limited bidirectional protection at 400 W.
Availability
BZW04-33BHE3/73 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O conditioning, telecom line card hardening, and consumer appliance motor drive circuits requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for BZW04-33BHE3/73 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 passive components with emphasis on reliability and automotive-grade validation.
The BZW04 series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, bidirectional transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and precise clamping performance are mandatory.
FAQ
What is the polarity configuration of BZW04-33BHE3/73?
BZW04-33BHE3/73 is a bidirectional TVS diode with symmetrical anode/cathode terminals - no color band or marking is present, and either lead may be connected to the protected line or ground. This configuration ensures identical clamping behavior for positive and negative transients, as confirmed in the Vishay datasheet Section "BIDIRECTIONAL TYPES" and Mechanical Data table.
Is BZW04-33BHE3/73 qualified for automotive applications?
Yes, BZW04-33BHE3/73 carries the HE3 suffix, indicating AEC-Q101 qualification per Vishay's ordering information and Note (1) on page 4 of Document Number 88316. It has passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - making it suitable for under-hood and body electronics in passenger vehicles and commercial vehicles.
What is the maximum clamping voltage of BZW04-33BHE3/73 under surge conditions?
The maximum clamping voltage (VC) of BZW04-33BHE3/73 is 53.9 V at 7.4 A peak pulse current (IPPM), measured with a 10/1000 μs waveform at TA = 25 °C. This value is specified in the Electrical Characteristics table on page 2 of the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
How does the thermal performance of BZW04-33BHE3/73 scale with ambient temperature?
BZW04-33BHE3/73 follows the derating curve in Figure 2 of the Vishay datasheet: its peak pulse power (PPPM) decreases linearly above 25 °C ambient, reaching ~50 % of 400 W at TJ = 125 °C. The absolute maximum junction temperature remains +175 °C, and steady-state power dissipation is limited to 1.5 W on an infinite heatsink at TL = 75 °C per the Maximum Ratings table.
Can BZW04-33BHE3/73 replace unidirectional TVS diodes in existing designs?
No - BZW04-33BHE3/73 is strictly bidirectional and lacks polarity marking; it cannot substitute for unidirectional TVS diodes (e.g., BZW04-33HE3) in circuits requiring DC blocking or asymmetric clamping. Attempting replacement risks improper transient routing and failure to protect forward-biased paths. Always verify polarity requirements and consult the "Polarity" note in the Mechanical Data section before substitution.
BZW04-33BHE3/73 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:
- Active
- 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:
- -
- 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)
BZW04-33BHE3/73 FAQ
1.How can I place an order for BZW04-33BHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-33BHE3/73 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 BZW04-33BHE3/73 reliable?
The price and inventory of BZW04-33BHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-33BHE3/73 is usually 5 days.
3.What payment methods are accepted for BZW04-33BHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-33BHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-33BHE3/73?
BZW04-33BHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-33BHE3/73 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 BZW04-33BHE3/73?
For technical support, including BZW04-33BHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-33BHE3/73 requirements.
6.How does Aetrix verify that BZW04-33BHE3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04-33BHE3/73 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 BZW04-33BHE3/73 meets industry standards.
7.What is the process for return or replacement of BZW04-33BHE3/73?
All BZW04-33BHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-33BHE3/73, 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 BZW04-33BHE3/73 part is unused and in its original packaging.
Return procedure for BZW04-33BHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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