Ametherm MS35 5R025

The MS35 5R025 inrush current limiting thermistor from Ametherm offers a maximum steady state current of 25A (up to +25°C) and a resistance of 5Ω ±25% (at 25°C). Ametherm’s MegaSurge™ series of inrush current limiting thermistors are capable of handling up to 900 joules of energy and 50 amperes of steady state current. These power thermistors are rugged and built to last even in the most demanding high power applications. The Ametherm MS35 devices play a key role in alternative energy applications by avoiding current spikes in the power generated by wind turbines, solar panels, and other sources as it’s fed into batteries, inverters, and other energy storage components. These MegaSurge™ devices are also used to regulate the release of battery energy in electric vehicles and in pre-charge circuits for many different types of battery chargers.

• Inrush current limiting thermistor
• Resistance of 5Ω (at 25°C)
• Maximum steady state current of 25A (up to +25°C)
• Maximum recommended energy of 600J
• Voltage ratings of 120VAC, 240VAC, 440VAC and 680VAC
• Actual energy failure at 1200J
• 0.03Ω at 100% maximum current and 0.08Ω at 50% maximum current
• Body temperature of +212°C at maximum current
• Material type H (for beta and curve)
• Tolerance ±25%
• Dissipation constant of 102.45mW/°C
• Thermal time constant of 134mW/s

Typical applications for the MS35 series include:

• Regulate the release of battery energy in electric vehicles and in pre-charge circuits for many different types of battery chargers.
• Power generated by wind turbines, solar panels, and other sources as it’s fed into batteries, inverters, and other energy storage components

The below table gives the full specifications of the Ametherm MS35 5R025 series: