Overview
The MMSZ18ET1G is a Zener voltage regulator from ON Semiconductor, designed for surface mount applications. This component is part of the MMSZxxxET1G series, which offers a wide range of Zener reverse voltages. The MMSZ18ET1G is specifically rated for a Zener voltage of 18 V, making it suitable for various voltage regulation and protection circuits. It is packaged in the SOD-123 case, which is optimized for automated board assembly and high-density applications.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Reverse Zener Voltage | VZ | 18 V (Nominal), 17.1 V (Min), 18.9 V (Max) | V |
| Reverse Current | IZT | 5 mA (Typical) | mA |
| Maximum Zener Impedance | ZZT | 45 Ω (Typical) | Ω |
| Reverse Leakage Current | IR | 0.05 μA (Max) @ VR = 17.1 V | μA |
| Peak Power Dissipation | Ppk | 225 W (8 x 20 μs) | W |
| Total Power Dissipation on FR-5 Board | PD | 500 mW @ TL = 75°C | mW |
| Thermal Resistance, Junction-to-Ambient | RθJA | 340 °C/W | °C/W |
| Junction and Storage Temperature Range | TJ, Tstg | -55 to +150 °C | °C |
| ESD Rating | - | Class 3 (> 16 kV) per Human Body Model | - |
| Package | - | SOD-123 (Pb-Free) | - |
Key Features
- Wide Zener reverse voltage range: 18 V nominal voltage with ±5% tolerance.
- High power dissipation: 500 mW rating on FR-4 or FR-5 board.
- Peak power dissipation: 225 W (8 x 20 μs).
- Small package size: SOD-123 case for high-density applications.
- ESD rating: Class 3 (> 16 kV) per Human Body Model.
- AEC-Q101 qualified and PPAP capable, suitable for automotive and other demanding applications.
- Pb-Free packages available.
Applications
- Voltage regulation and stabilization in electronic circuits.
- Overvoltage protection in power supplies and electronic devices.
- Automotive electronics requiring high reliability and robustness.
- High-density applications where space is limited.
- General-purpose voltage regulation in industrial and consumer electronics.
Q & A
- What is the nominal Zener voltage of the MMSZ18ET1G?
The nominal Zener voltage of the MMSZ18ET1G is 18 V.
- What is the maximum power dissipation of the MMSZ18ET1G on an FR-5 board?
The maximum power dissipation is 500 mW at a temperature of 75°C.
- What is the peak power dissipation of the MMSZ18ET1G?
The peak power dissipation is 225 W for an 8 x 20 μs pulse.
- What is the thermal resistance of the MMSZ18ET1G from junction to ambient?
The thermal resistance from junction to ambient is 340 °C/W.
- Is the MMSZ18ET1G ESD rated?
Yes, it has an ESD rating of Class 3 (> 16 kV) per Human Body Model.
- What package type is the MMSZ18ET1G available in?
The MMSZ18ET1G is available in the SOD-123 package, which is Pb-Free.
- Is the MMSZ18ET1G suitable for automotive applications?
Yes, it is AEC-Q101 qualified and PPAP capable, making it suitable for automotive and other demanding applications.
- What is the junction and storage temperature range of the MMSZ18ET1G?
The junction and storage temperature range is -55 to +150 °C.
- How is the MMSZ18ET1G marked for polarity?
The cathode is indicated by a polarity band on the device.
- What are some common applications of the MMSZ18ET1G?
Common applications include voltage regulation, overvoltage protection, and use in automotive and high-density electronic circuits.
