Overview
The 1SMA5945BT3G is a 1.5 Watt Zener diode produced by onsemi, designed for general purpose voltage regulation applications. This device is part of the 1SMA59xxBT3G series, which offers a wide range of Zener breakdown voltages from 3.3 V to 68 V. It is ideal for various applications requiring stable voltage regulation, waveform clipping, and MOSFET gate protection.
The device features a low profile package, making it suitable for space-constrained designs. It is also ESD rated with a Class 3 rating (>16 kV) per Human Body Model, ensuring robustness against electrostatic discharge. The flat handling surface facilitates accurate placement, and the package design allows for top side or bottom circuit board mounting.
The 1SMA5945BT3G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive and other applications that require unique site and control change requirements. It is available in Pb-free packages and comes in tape and reel for convenient handling and storage.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Zener Breakdown Voltage | VZ | 64.6 - 71.4 | V |
| Maximum Power Dissipation | PD | 1.5 | W |
| Maximum Zener Current | IZM | 50 | mA |
| Reverse Leakage Current | IR | 0.25 | μA |
| ESD Rating | - | Class 3 (>16 kV) | - |
| Operating Temperature Range | TJ | -65 to +150 | °C |
| Maximum Case Temperature for Soldering | - | 260°C for 10 seconds | - |
| Package Type | - | SMA (DO-214AC) | - |
Key Features
- Standard Zener Breakdown Voltage Range – 3.3 V to 68 V
- ESD Rating of Class 3 (>16 kV) per Human Body Model
- Flat Handling Surface for Accurate Placement
- Package Design for Top Side or Bottom Circuit Board Mounting
- Low Profile Package
- Ideal Replacement for MELF Packages
- AEC-Q101 Qualified and PPAP Capable
- SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements
- Pb-Free Packages Available
Applications
- Voltage Regulation
- Waveform Clipping
- MOSFET Gate Protection
- General Purpose Voltage Regulation in Various End Products
- Automotive and Industrial Applications Requiring High Reliability
Q & A
- What is the Zener breakdown voltage range of the 1SMA5945BT3G?
The Zener breakdown voltage range of the 1SMA5945BT3G is 64.6 V to 71.4 V.
- What is the maximum power dissipation of the 1SMA5945BT3G?
The maximum power dissipation is 1.5 W.
- What is the ESD rating of the 1SMA5945BT3G?
The ESD rating is Class 3 (>16 kV) per Human Body Model.
- What is the operating temperature range of the 1SMA5945BT3G?
The operating temperature range is -65°C to +150°C.
- Is the 1SMA5945BT3G suitable for automotive applications?
Yes, it is AEC-Q101 qualified and PPAP capable, making it suitable for automotive and other high-reliability applications.
- What package type does the 1SMA5945BT3G come in?
The 1SMA5945BT3G comes in an SMA (DO-214AC) package.
- Is the 1SMA5945BT3G Pb-free?
Yes, the 1SMA5945BT3G is available in Pb-free packages.
- What are some common applications of the 1SMA5945BT3G?
Common applications include voltage regulation, waveform clipping, MOSFET gate protection, and general purpose voltage regulation in various end products.
- Can the 1SMA5945BT3G be used as a replacement for MELF packages?
Yes, it is designed as an ideal replacement for MELF packages.
- How is the polarity of the 1SMA5945BT3G indicated?
The polarity is indicated by a molded polarity notch or cathode band.
