Overview
The 1SMA5939BT3G is a 1.5 Watt plastic surface mount Zener voltage regulator produced by onsemi. This device is part of the 1SMA59xxBT3G series, designed for general purpose voltage regulation applications. It offers a range of benefits including a standard Zener breakdown voltage, high ESD rating, and a low profile package suitable for various mounting configurations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reverse Zener Voltage (VZ) | 37.05 - 39 - 40.95 | V |
| Reverse Current (IZT) | 45 | mA |
| Maximum Zener Impedance (ZZT) | 29.7 | Ω |
| Reverse Leakage Current (IR) | 0.25 | μA |
| Forward Current (IF) | 200 | mA |
| Forward Voltage (VF) | 1.2 | V |
| DC Power Dissipation @ TL = 75°C | 1.5 | W |
| Thermal Resistance, Junction-to-Lead (RθJL) | 50 | °C/W |
| Operating and Storage Temperature Range | -65 to +150 | °C |
| ESD Rating | Class 3 (> 16 kV) per Human Body Model |
Key Features
- Standard Zener breakdown voltage range from 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 slide or bottom circuit board mounting.
- Low profile package ideal for space-saving designs.
- Ideal replacement for MELF packages.
- AEC-Q101 qualified and PPAP capable.
- Pb-free devices.
Applications
The 1SMA5939BT3G Zener diode is suitable for a variety of applications requiring voltage regulation, including:
- General purpose voltage regulation.
- Automotive applications due to its AEC-Q101 qualification.
- Industrial and commercial electronics where stable voltage regulation is necessary.
- Power supplies and voltage stabilizers.
Q & A
- What is the reverse Zener voltage range of the 1SMA5939BT3G?
The reverse Zener voltage range is 37.05 V to 40.95 V. - What is the maximum power dissipation of the 1SMA5939BT3G at TL = 75°C?
The maximum power dissipation is 1.5 W. - What is the ESD rating of the 1SMA5939BT3G?
The ESD rating is Class 3 (> 16 kV) per Human Body Model. - Is the 1SMA5939BT3G Pb-free?
Yes, the device is Pb-free. - What is the operating and storage temperature range of the 1SMA5939BT3G?
The operating and storage temperature range is -65°C to +150°C. - What is the thermal resistance, Junction-to-Lead (RθJL), of the 1SMA5939BT3G?
The thermal resistance, Junction-to-Lead (RθJL), is 50°C/W. - Is the 1SMA5939BT3G AEC-Q101 qualified?
Yes, the device is AEC-Q101 qualified and PPAP capable. - What are the typical applications of the 1SMA5939BT3G?
Typical applications include general purpose voltage regulation, automotive, industrial, and commercial electronics. - What is the forward voltage (VF) of the 1SMA5939BT3G?
The forward voltage (VF) is 1.2 V at IF = 200 mA. - Can the 1SMA5939BT3G be used in high-temperature environments?
Yes, it can operate in a wide temperature range, but it must be derated above 75°C to ensure reliability.
