Overview
The MMSZ5251BT1G is a Zener voltage regulator from onsemi, part of the MMSZ52xxxT1G series. This component is designed for general-purpose, medium-current applications and is available in a surface-mount SOD-123 package. It offers a wide range of Zener reverse voltages, making it versatile for various electronic circuits. The device is Pb-free, AEC-Q101 qualified, and PPAP capable, ensuring high reliability and compliance with automotive and other stringent application requirements.
Key Specifications
| Parameter | Symbol | Min | Nom | Max | Units |
|---|---|---|---|---|---|
| Reverse Zener Voltage @ IZT | VZ | 20.90 | 22 | 23.10 | V |
| Reverse Current @ IZT | IZT | 20 | - | - | mA |
| Maximum Zener Impedance @ IZT | ZZT | - | - | 1600 | Ω |
| Reverse Leakage Current @ VR | IR | - | - | 0.1 | μA |
| Total Power Dissipation on FR-5 Board @ TL = 75°C | PD | - | 500 | - | mW |
| Thermal Resistance, Junction-to-Ambient | RθJA | - | 340 | - | °C/W |
| Junction and Storage Temperature Range | TJ, Tstg | -55 | - | 150 | °C |
Key Features
- 500 mW power rating on FR-4 or FR-5 board
- Wide Zener reverse voltage range from 2.4 V to 110 V at thermal equilibrium
- Surface-mount SOD-123 package designed for optimal automated board assembly
- Small package size suitable for high-density applications
- ESD rating of Class 3 (> 16 kV) per Human Body Model
- AEC-Q101 qualified and PPAP capable for automotive and other stringent applications
- Pb-free device with corrosion-resistant finish
Applications
- General-purpose voltage regulation in electronic circuits
- Automotive systems requiring high reliability and compliance with AEC-Q101 standards
- High-density applications where small package size is crucial
- Protection circuits against voltage spikes and transients
- Medium-current applications in industrial and consumer electronics
Q & A
- What is the maximum power dissipation of the MMSZ5251BT1G on an FR-5 board?
The maximum power dissipation is 500 mW at TL = 75°C, derated above 75°C.
- What is the Zener reverse voltage range for the MMSZ5251BT1G?
The Zener reverse voltage range is from 20.90 V to 23.10 V.
- What is the thermal resistance, junction-to-ambient, for this device?
The thermal resistance, junction-to-ambient, is 340 °C/W.
- Is the MMSZ5251BT1G Pb-free and what is its ESD rating?
Yes, the device is Pb-free and has an ESD rating of Class 3 (> 16 kV) per Human Body Model.
- What are the typical applications for the MMSZ5251BT1G?
Typical applications include general-purpose voltage regulation, automotive systems, high-density applications, and protection circuits.
- What is the junction and storage temperature range for the MMSZ5251BT1G?
The junction and storage temperature range is -55°C to +150°C.
- Is the MMSZ5251BT1G AEC-Q101 qualified?
Yes, the device is AEC-Q101 qualified and PPAP capable.
- What package type does the MMSZ5251BT1G use?
The device uses a surface-mount SOD-123 package.
- What is the reverse leakage current at VR for the MMSZ5251BT1G?
The reverse leakage current at VR is 0.1 μA.
- How is the nominal Zener voltage measured for the MMSZ5251BT1G?
The nominal Zener voltage is measured with the device junction in thermal equilibrium at TL = 30°C ±1°C.
