BZW04-33B STMicroelectronics TVS Diode (Bi-directional) (Diodes, Axial Diameter Horizontal Mounting) In Stock
BZW04-33B is a bidirectional TVS diode from STMicroelectronics offering 400W peak pulse power dissipation with a 37.1V minimum breakdown voltage and 69.7V clamping voltage in a compact DO-15 axial package. From $0.15 in stock worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Diodes, Axial Diameter Horizontal Mounting
- Pin Count
- 2
- Lifecycle
- OBSOLETE
- Datasheet
- BZW04-33B Datasheet PDF
- Category
- TVS Diode (Bi-directional)
- Price
- From $0.0970(MOQ 2500)
- Temp Range
- ?°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 400W peak pulse power dissipation for robust transient protection
- Bidirectional configuration protects AC circuits and sensitive components from voltage spikes
- 225 pF typical capacitance in compact DO-15 axial package for easy PCB integration
Applications
The BZW04-33B is widely used in industrial power supplies and automotive electronics to protect sensitive circuits from voltage transients and ESD events. Its bidirectional operation makes it suitable for AC line protection in telecom equipment and motor drive circuits. The high 400W pulse power rating supports demanding applications such as relay contact protection and lightning surge suppression.
Specifications
| YTEOL | 0 |
| Breakdown Voltage-Min | 37.1V |
| Case Connection | ISOLATED |
| Clamping Voltage-Max | 69.7V |
| Configuration | SINGLE, 1 CHANNEL |
| Diode Capacitance-Min | 225pF |
| Diode Element Material | SILICON |
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE |
| JEDEC-95 Code | DO-15 |
| JESD-30 Code | O-PALF-W2 |
| JESD-609 Code | e3 |
| Non-rep Peak Rev Power Dis-Max | 400W |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | ROUND |
| Package Style | LONG FORM |
| Polarity | BIDIRECTIONAL |
| Power Dissipation-Max | 1.7W |
| Qualification Status | Not Qualified |
| Reference Standard | UL RECOGNIZED |
| Rep Pk Reverse Voltage-Max | 33V |
| Reverse Current-Max | 5 µA |
| Reverse Test Voltage | 33V |
| Surface Mount | NO |
| Technology | AVALANCHE |
| Terminal Finish | MATTE TIN |
| Terminal Form | WIRE |
| Terminal Position | AXIAL |
| ## BZW04-33B Alternates Showing results | Image |
| Package | Diodes, Axial Diameter Horizontal Mounting |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for BZW04-33B:
suggested
suggested
Frequently Asked Questions
What peak pulse power can the BZW04-33B handle during a transient event?
The BZW04-33B is rated for 400W peak pulse power dissipation, making it capable of absorbing high-energy transients. It clamps voltage at a maximum of 69.7V and has a minimum breakdown voltage of 37.1V, ensuring reliable protection for sensitive downstream components in industrial and consumer circuits.
For AC line protection designs, why is the bidirectional BZW04-33B preferred over a unidirectional TVS diode?
Bidirectional TVS diodes like the BZW04-33B can suppress positive and negative voltage transients equally, which is essential for AC circuits where polarity alternates. The 37.1V minimum breakdown voltage and 69.7V clamping voltage mean both half-cycles of the AC waveform are protected at the same clamp level, avoiding asymmetric protection gaps.
How does the BZW04-33B compare to lower wattage alternatives like a 200W TVS diode in a motor drive design?
In a motor drive design, inductive kickback transients can exceed 200W in energy, making a 200W-rated TVS potentially under-spec. The BZW04-33B's 400W peak pulse rating provides a 2x safety margin, accommodating longer transient durations or higher surge currents up to the 400W limit without device failure or degraded clamping performance over temperature.
What is the diode capacitance of the BZW04-33B and how does it affect high-speed signal lines?
The BZW04-33B has a typical diode capacitance of 225 pF, which is relatively high compared to low-capacitance TVS variants. This makes it better suited for power line protection rather than high-speed data lines where signal integrity at frequencies above a few MHz could be degraded by the capacitive loading effect.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 2500+ | $0.1480 | $370.00 |
| 4000+ | $0.1094 | $437.76 |
| 8000+ | $0.0998 | $798.40 |
| 12000+ | $0.0970 | $1164.24 |
| 80000+ | $0.0970 | $7756.80 |
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