Overview
The 1.5SMC51AT3G is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc. This component is designed to protect voltage-sensitive components from high voltage, high energy transients. Although this series has been marked as End of Life (EOL) as of December 31, 2017, and is not recommended for new designs, it remains relevant for existing applications and maintenance. The replacement series recommended is the 1.5SMC series.
The 1.5SMC51AT3G features excellent clamping capability, high surge capability, low zener impedance, and a fast response time, making it suitable for various industrial and consumer applications.
Key Specifications
| Property | Value |
|---|---|
| Manufacturer | Littelfuse Inc. |
| Series | 1.5SMC |
| Type | Zener |
| Unidirectional Channels | 1 |
| Bidirectional Channels | - |
| Voltage - Reverse Standoff (Typ) | 43.6 V |
| Voltage - Breakdown (Min) | 48.5 V |
| Voltage - Clamping (Max) @ Ipp | 70.1 V |
| Current - Peak Pulse (10/1000µs) | 21.4 A |
| Power - Peak Pulse | 1500 W (1.5 kW) |
| Power Line Protection | No |
| Operating Temperature | -65°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | DO-214AB, SMC |
| ESD Rating | Class 3 (>16 kV) per Human Body Model |
| Response Time | Typically < 1 ns |
Key Features
- Excellent clamping capability and high surge capability.
- Low zener impedance and fast response time (typically < 1 ns).
- Peak power rating of 1500 W at 1 ms.
- ESD rating of Class 3 (>16 kV) per Human Body Model.
- Low leakage current (< 5 µA above 10 V).
- UL 497B for isolated loop circuit protection.
- AEC-Q101 qualified and PPAP capable.
- Pb-free packages available.
- Void-free, transfer-molded, thermosetting plastic case.
- Corrosion-resistant external surfaces and readily solderable leads.
- Maximum case temperature for soldering purposes: 260°C for 10 seconds.
- Modified L-bend leads providing more contact area to bond pads.
- Cathode indicated by molded polarity notch.
Applications
The 1.5SMC51AT3G is ideally suited for a variety of applications, including:
- Communication systems.
- Numerical controls.
- Process controls.
- Medical equipment.
- Business machines.
- Power supplies.
- Automotive electronics.
- Industrial automation.
- Telecom equipment.
- General-purpose electronics.
Q & A
- What is the primary function of the 1.5SMC51AT3G TVS diode?
The primary function of the 1.5SMC51AT3G TVS diode is to protect voltage-sensitive components from high voltage, high energy transients.
- What is the peak power rating of the 1.5SMC51AT3G?
The peak power rating of the 1.5SMC51AT3G is 1500 W at 1 ms.
- What is the ESD rating of the 1.5SMC51AT3G?
The ESD rating of the 1.5SMC51AT3G is Class 3 (>16 kV) per Human Body Model.
- What is the operating temperature range of the 1.5SMC51AT3G?
The operating temperature range of the 1.5SMC51AT3G is -65°C to 150°C (TJ).
- What type of package does the 1.5SMC51AT3G come in?
The 1.5SMC51AT3G comes in a DO-214AB, SMC package.
- Is the 1.5SMC51AT3G Pb-free?
- What is the response time of the 1.5SMC51AT3G?
The response time of the 1.5SMC51AT3G is typically less than 1 ns.
- What are some common applications for the 1.5SMC51AT3G?
- Is the 1.5SMC51AT3G AEC-Q101 qualified?
- Why is the 1.5SMC51AT3G not recommended for new designs?
