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Vishay General Semiconductor - Diodes Division BZW04P33HE3/73
- Part No.:
- BZW04P33HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P33HE3/73.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,900
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Product details
Overview
BZW04P33HE3/73 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 modules, and telecom line protection.
For engineers reviewing the BZW04P33HE3/73 datasheet, BZW04P33HE3/73 pinout, BZW04P33HE3/73 application, or BZW04P33HE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, DO-204AL (DO-41) axial package, bi-directional symmetry, low clamping ratio (VC/VWM = 1.62), and 0.1 % duty cycle repetitive surge capability.
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 ESD, lightning-induced transients, and inductive switching spikes. Its symmetrical breakdown behavior ensures identical clamping performance in both polarities, eliminating polarity-dependent design constraints.
The device operates across –55 °C to +175 °C junction temperature range and is rated for 1.5 W steady-state power dissipation at TL = 75 °C. It meets JESD22-B102 solderability standards and JESD201 class 2 whisker resistance (HE3 suffix), confirming suitability for high-reliability automotive PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 10/1000 μs surge; limits downstream IC stress to sub-54 V under worst-case transient |
| PPPM | 400 W - peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity |
| TJ max. | +175 °C - maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD-HBM ≥ 8 kV, ensuring long-term field stability |
| Package | DO-204AL (DO-41) - axial-leaded, UL 94 V-0 molded epoxy case; compatible with wave and selective soldering at ≤275 °C for 10 s |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage at rated stand-off voltage; prevents signal integrity degradation in high-impedance sensor lines |
Pinout & Package
DO-204AL (DO-41) axial package: cylindrical molded epoxy body with tinned copper leads; no polarity marking (bi-directional); lead diameter 0.023–0.026 in (0.58–0.66 mm); overall length ≥1.0 in (25.4 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals; either lead serves as input/output path for transient energy diversion in both directions |
| Lead 1 | Current path terminal | Connects to protected line (e.g., CAN_H, RS-485 A, or DC bus); carries full IPPM during clamping event |
| Lead 2 | Current path terminal | Connects to reference plane (GND or return); completes low-inductance surge current loop with Lead 1 |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche breakdown without degradation after >1000 surges at rated PPPM |
| 400 W 10/1000 μs rating | Supports EN 61000-4-5 surge testing up to 4 kV open-circuit voltage with 2 Ω source impedance |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS camera links, and body electronics |
| Bi-directional symmetry | Eliminates need for polarity-aware layout; simplifies routing on differential buses like CAN or RS-485 |
| UL 94 V-0 molding | Self-extinguishing epoxy housing prevents flame propagation in safety-critical enclosures |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor output lines from load dump and ISO 7637-2 pulses in 12 V vehicle systems. IC Role / Device Role / Timing Role: Standby-mode voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient overshoot to ≤53.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V signal chain components. |
Use Scenario: Safeguarding RS-485 transceivers (e.g., SN65HVD230) against EFT bursts and cable discharge events in factory automation networks. IC Role / Device Role / Timing Role: Bi-directional shunt protector on A/B differential pair, referenced to local ground. Use Value: Maintains signal integrity by clamping common-mode surges while adding <1 pF junction capacitance at VWM. |
| Telecom Line Card Surge Suppression | DC Power Rail Clamping |
Use Scenario: Secondary protection stage on POTS line interface cards exposed to lightning-induced longitudinal surges per ITU-T K.20. IC Role / Device Role / Timing Role: Fast-response clamp between tip/ring and ground, downstream of gas discharge tube primary protection. Use Value: Activates within <1 ns to limit residual voltage to 53.9 V, meeting GR-1089-CORE Level 3 (6 kV) requirements. |
Use Scenario: Overvoltage clamp on 24 V DC input rail of programmable logic controller (PLC) I/O module. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing inductive kickback from solenoid drivers and relay coils. Use Value: Sustains 400 W surge without thermal runaway, enabling reliable operation across –40 °C to +85 °C ambient. |
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) and VC (53.9 V), but SMB package (surface-mount); 600 W PPPM rating | Requires PCB re-layout for SMD footprint; better suited for space-constrained designs with automated assembly | Select SMBJ33CA when board real estate is limited and wave soldering is not required. |
| P6KE33CA | Higher VWM (33.2 V), same VC (53.9 V), but lower PPPM (600 W); DO-15 package; non-AEC-Q101 | Lacks automotive qualification; suitable only for commercial/industrial use where AEC compliance is not mandated | Choose P6KE33CA for cost-sensitive non-automotive applications needing identical clamping performance. |
Compared with BZW04P33HE3/73, SMBJ33CA offers higher surge power in a compact SMD form factor but requires layout change, while P6KE33CA provides equivalent clamping at lower cost but omits AEC-Q101 validation - making BZW04P33HE3/73 the sole choice for production automotive designs requiring through-hole assembly and certified reliability.
Availability
BZW04P33HE3/73 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interface hardening, and telecom line card surge suppression requiring stable component supply, AEC-Q101 traceability, and DO-41 through-hole compatibility.
Supply support for BZW04P33HE3/73 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 for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience and long-term parametric stability are critical.
FAQ
What is the clamping voltage of the BZW04P33HE3/73 under a 10/1000 μs surge?
The BZW04P33HE3/73 clamps to a maximum of 53.9 V when subjected to its rated 7.4 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88316, Rev. 12-Jul-11) and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the BZW04P33HE3/73 suitable for automotive applications?
Yes, the BZW04P33HE3/73 is AEC-Q101 qualified and explicitly rated for automotive use. Its HE3 suffix denotes AEC-Q101 qualification, high-temperature operation up to +175 °C junction, and compliance with JESD201 class 2 whisker resistance - making it appropriate for engine control, ADAS, and body electronics systems.
Does the BZW04P33HE3/73 have polarity markings?
No, the BZW04P33HE3/73 is a bi-directional TVS diode and carries no polarity marking on its DO-204AL (DO-41) package. Both leads are functionally identical, allowing installation in either orientation - a key advantage for protecting symmetric signal paths like CAN or RS-485 differential pairs.
What is the maximum steady-state power dissipation of the BZW04P33HE3/73?
The BZW04P33HE3/73 has a maximum power dissipation (PD) of 1.5 W when mounted on an infinite heatsink at lead temperature (TL) of 75 °C. Derating applies above 25 °C ambient per Figure 5 in the datasheet, and actual usable power depends on PCB copper area and airflow.
How does the BZW04P33HE3/73 compare to uni-directional TVS diodes in circuit design?
Unlike uni-directional TVS diodes, the BZW04P33HE3/73 provides symmetrical clamping in both voltage polarities without requiring cathode/anode orientation checks. This eliminates risk of incorrect placement and simplifies layout for AC-coupled or bidirectional data lines - though it cannot replace uni-directional parts in DC-biased circuits where forward conduction must be blocked.
BZW04P33HE3/73 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:
- -
- 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)
BZW04P33HE3/73 FAQ
1.How can I place an order for BZW04P33HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P33HE3/73 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 BZW04P33HE3/73 reliable?
The price and inventory of BZW04P33HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P33HE3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P33HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P33HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P33HE3/73?
BZW04P33HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P33HE3/73 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 BZW04P33HE3/73?
For technical support, including BZW04P33HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P33HE3/73 requirements.
6.How does Aetrix verify that BZW04P33HE3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P33HE3/73 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 BZW04P33HE3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P33HE3/73?
All BZW04P33HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P33HE3/73, 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 BZW04P33HE3/73 part is unused and in its original packaging.
Return procedure for BZW04P33HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P33HE3/73 Tags
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