Overview
The 1SMA33CAT3G is a surface mount Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc. This component is designed to protect voltage-sensitive components from high voltage and high energy transients. It is part of the SMA series, known for its excellent clamping capability, high surge capability, and fast response time. Although this series has been marked for End of Life (EOL) as of December 31, 2017, and is not recommended for new designs, it remains a reliable choice for existing applications.
Key Specifications
| Property | Value |
|---|---|
| Part Number | 1SMA33CAT3G |
| Manufacturer | Littelfuse Inc. |
| Description | TVS DIODE 33V 53.3V SMA |
| Voltage - Reverse Standoff (Typ) | 33V |
| Voltage - Clamping (Max) @ Ipp | 53.3V |
| Voltage - Breakdown (Min) | 36.7V |
| Power - Peak Pulse | 400W |
| Current - Peak Pulse (10/1000µs) | 7.5A |
| Package / Case | DO-214AC, SMA |
| Mounting Type | Surface Mount |
| Operating Temperature | -65°C ~ 150°C (TJ) |
| Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Capacitance @ Frequency | 190pF @ 1MHz |
| Bidirectional Channels | 1 |
Key Features
- Excellent Clamping Capability: Effective in protecting against high voltage and high energy transients.
- High Surge Capability: Can handle peak power ratings of 400W at 1 ms.
- Fast Response Time: Typically below 1 ns, ensuring quick protection against transient voltage spikes.
- Compact SMA Package: Suitable for space-constrained designs with a low profile package.
- Low Zener Impedance: Ensures minimal impedance in zener operation.
- ESD Rating: Class 3 (>16 kV) per Human Body Model.
- Corrosion Resistant: All external surfaces are corrosion resistant with readily solderable leads.
Applications
The 1SMA33CAT3G is widely used in various applications requiring voltage regulation and transient voltage suppression. These include:
- Voltage Regulation: Ideal for voltage regulation in electronic circuits and systems.
- Transient Voltage Suppression: Used for protecting sensitive components from voltage spikes and transients.
- Overvoltage Protection: Suitable for overvoltage protection in power supplies and communication systems.
- Communication Systems: Protects components in communication systems from high energy transients.
- Automotive: Used in automotive applications such as numerical controls, process controls, and medical equipment.
- Industrial/Consumer Electronics: Found in business machines, power supplies, and other industrial/consumer applications.
Q & A
- What is the primary function of the 1SMA33CAT3G?
The primary function of the 1SMA33CAT3G is to protect voltage-sensitive components from high voltage and high energy transients. - What is the peak power rating of the 1SMA33CAT3G?
The peak power rating of the 1SMA33CAT3G is 400W at 1 ms. - What is the typical response time of the 1SMA33CAT3G?
The response time is typically below 1 ns. - What package type does the 1SMA33CAT3G use?
The 1SMA33CAT3G is housed in a DO-214AC, SMA package. - Is the 1SMA33CAT3G lead-free and RoHS compliant?
Yes, the 1SMA33CAT3G is lead-free and RoHS compliant. - What is the operating temperature range of the 1SMA33CAT3G?
The operating temperature range is -65°C to 150°C (TJ). - What is the ESD rating of the 1SMA33CAT3G?
The ESD rating is Class 3 (>16 kV) per Human Body Model. - Is the 1SMA33CAT3G suitable for new designs?
No, the 1SMA33CAT3G is not recommended for new designs as it has been marked for End of Life (EOL) as of December 31, 2017. - What are some common applications of the 1SMA33CAT3G?
Common applications include voltage regulation, transient voltage suppression, overvoltage protection, communication systems, automotive, and industrial/consumer electronics. - How should the 1SMA33CAT3G be connected in a circuit?
Connect the Anode and Cathode pins of the 1SMA33CAT3G to the corresponding circuit nodes, ensuring proper polarity and rating compatibility. Refer to the datasheet for detailed usage instructions.
