The MS12 15102 inrush current limiting thermistor from Ametherm offers a maximum steady state current of 2A (up to +25°C), resistance of 150Ω ±25% (at 25°C) and a maximum recommended energy rating of 110J. Ametherm’s MegaSurge™ series of inrush current limiting NTC thermistors reduce costs and greatly simplify designs. In addition, they increase safety by eliminating the fire hazard associated with failed relays. While traditional thermistors are only certified for input voltages from 85 VAC to 265 VAC, UL recognised MegaSurge™ devices are certified for single and three phase input voltages up to 480 VAC. These specifications are the highest of any single-solution inrush current limiting device on the market.
- Inrush current limiting thermistor
- Resistance of 150Ω (at 25°C)
- Maximum steady state current of 2A (up to +25°C)
- Maximum recommended energy of 110J
- Voltage ratings of 120VAC, 240VAC, 440VAC and 680VAC
- Actual energy failure at 231J
- 1.04Ω at 100% maximum current and 2.7Ω at 50% maximum current
- Body temperature of +172°C at maximum current
- Material type I (for beta and curve)
- Tolerance ±25%
- Dissipation constant of 12.7mW/°C
- Thermal time constant of 71mW/s
- Recognised by Underwriters Laboratories (UL) for ensured safety
Typical applications for the MS12 series include:
- Inrush current protection of power supplies
- Motor controllers, Audio amplifiers, Battery chargers and Frequency generators,
- Plasma cutting tools, MRI machines and Toroidal transformers
The below table gives the full specifications of the Ametherm MS12 15102 series: