Overview
The 1SMB40AT3G is a Transient Voltage Suppressor (TVS) diode produced by Littelfuse Inc. This component is part of the SMB series, designed to protect voltage-sensitive components from high voltage, high energy transients. It features excellent clamping capability, high surge capability, low zener impedance, and a fast response time, making it highly reliable and cost-effective.
Key Specifications
| Parameter | Value |
|---|---|
| Working Peak Reverse Voltage Range | 10 V to 78 V |
| Standard Zener Breakdown Voltage Range | 11 V to 87 V |
| Peak Power Rating | 600 W @ 1.0 ms |
| ESD Rating | Class 3 (> 16 kV) per Human Body Model |
| Maximum Clamp Voltage @ Peak Pulse Current | Typically around 69.4 V for 1SMB40AT3G |
| Maximum Reverse Leakage Current @ VRWM | < 5.0 μA Above 10 V |
| Response Time | Typically < 1.0 ns |
| Operating and Storage Temperature Range | −65 to +150 °C |
| Package Type | Void-free, transfer-molded, thermosetting plastic (CASE 403A) |
| Lead Finish | All external surfaces are corrosion resistant and leads are readily solderable |
| Maximum Case Temperature for Soldering | 260 °C for 10 Seconds |
Key Features
- Excellent clamping capability and high surge capability.
- Low zener impedance and fast response time (typically < 1.0 ns).
- ESD Rating of Class 3 (> 16 kV) per Human Body Model.
- Low leakage current (< 5.0 μA above 10 V).
- UL 497B recognition for isolated loop circuit protection.
- SZ prefix for automotive and other applications requiring unique site and control change requirements; AEC-Q101 qualified and PPAP capable.
- Pb-free packages available.
Applications
The 1SMB40AT3G is ideally suited for use in various applications, including:
- Communication systems.
- Automotive systems.
- Numerical controls.
- Process controls.
- Medical equipment.
- Business machines.
- Power supplies.
- Other industrial and consumer applications.
Q & A
- What is the primary function of the 1SMB40AT3G?
The primary function of the 1SMB40AT3G is to protect voltage-sensitive components from high voltage, high energy transients.
- What is the peak power rating of the 1SMB40AT3G?
The peak power rating is 600 W @ 1.0 ms.
- What is the ESD rating of the 1SMB40AT3G?
The ESD rating is Class 3 (> 16 kV) per Human Body Model.
- What is the maximum clamp voltage at peak pulse current for the 1SMB40AT3G?
Typically around 69.4 V.
- What is the response time of the 1SMB40AT3G?
Typically less than 1.0 ns.
- Is the 1SMB40AT3G UL recognized?
- What are the operating and storage temperature ranges for the 1SMB40AT3G?
The operating and storage temperature ranges are −65 to +150 °C.
- What type of package does the 1SMB40AT3G come in?
The 1SMB40AT3G comes in a void-free, transfer-molded, thermosetting plastic package (CASE 403A).
- Are Pb-free packages available for the 1SMB40AT3G?
- In what applications is the 1SMB40AT3G commonly used?
The 1SMB40AT3G is commonly used in communication systems, automotive systems, numerical controls, process controls, medical equipment, business machines, power supplies, and other industrial and consumer applications.
