We’re Exhibiting at Space Tech Europe 2025

Space Tech Expo Europe, 18-20th November 2025, Bremen, Germany, Stand G56

Inrush Current Limiting Thermistors

  • Ametherm

Ametherm MS15 40004

  • Inrush current limiting thermistor
  • Resistance of 30Ω (at 25°C)
  • Maximum steady state current of 4.2A (<+25°C)
  • Maximum recommended energy of 135J
  • Voltage ratings from 120VAC to 680VAC
  • Body temperature of +150°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS22 10008

  • Inrush current limiting thermistor
  • Resistance of 10Ω (at 25°C)
  • Maximum steady state current of 8A up to +25°C
  • Maximum recommended energy of 200J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +194°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS22 12102

  • Inrush current limiting thermistor
  • Resistance of 120Ω ±25% (at 25°C)
  • Maximum steady state current of 2A
  • Maximum recommended energy of 220J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +155°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS22 12103

  • Inrush current limiting thermistor
  • Resistance of 120Ω (at 25°C)
  • Maximum steady state current of 3A
  • Maximum recommended energy of 220J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +165°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS22 12104

  • Inrush current limiting thermistor
  • Resistance of 120Ω (at 25°C)
  • Maximum steady state current of 4A
  • Maximum recommended energy of 220J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +175°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS22 20005

  • Inrush current limiting thermistor
  • Resistance of 20Ω (at 25°C)
  • Maximum steady state current of 5A
  • Maximum recommended energy of 180J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +170°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS22 22103

  • Inrush current limiting thermistor
  • Resistance of 220Ω (at 25°C)
  • Maximum steady state current of 3.5A
  • Maximum recommended energy of 75J
  • Voltage rating from 120VAC to 680VAC
  • Actual energy failure at 175J
  • 1.4Ω at 100% maximum current and 2.75Ω at 50% maximum current
  • Body temperature of +144°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS22 30005

  • Inrush current limiting thermistor
  • Resistance of 30Ω (at 25°C)
  • Maximum steady state current of 5A
  • Maximum recommended energy of 150J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +174°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS22 50004

  • Inrush current limiting thermistor,
  • Resistance of 50Ω (at 25°C)
  • Maximum steady state current of 4A
  • Maximum recommended energy of 240J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +159°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS22 75004

  • Inrush current limiting thermistor
  • Resistance of 75Ω (at 25°C)
  • Maximum steady state current of 4A
  • Maximum recommended energy of 240J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +169°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS32 0R536

  • Inrush current limiting thermistor
  • Resistance of 0.5Ω (at 25°C)
  • Maximum steady state current of 36A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +214°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS32 0R540

  • Inrush current limiting thermistor
  • Resistance of 0.5Ω ±25% (at 25°C)
  • Maximum steady state current of 40A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +244°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS32 10015

  • Inrush current limiting thermistor
  • Resistance of 10Ω (at 25°C)
  • Maximum steady state current of 15A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +224°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS32 15012

  • Inrush current limiting thermistor
  • Resistance of 15Ω (at 25°C)
  • Maximum steady state current of 12A
  • Maximum recommended energy of 250
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +229°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS32 20008

  • Inrush current limiting thermistor
  • Resistance of 20Ω (at 25°C)
  • Maximum steady state current of 8A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +204°C at maximum current
  • Exempt
  • Ametherm

Ametherm MS32 20010

  • Inrush current limiting thermistor
  • Resistance of 20Ω (at 25°C)
  • Maximum steady state current of 10A
  • Maximum recommended energy of 250
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +224°C at maximum current
  • Exempt

Ametherm MS15 40004

  • Inrush current limiting thermistor
  • Resistance of 30Ω (at 25°C)
  • Maximum steady state current of 4.2A (<+25°C)
  • Maximum recommended energy of 135J
  • Voltage ratings from 120VAC to 680VAC
  • Body temperature of +150°C at maximum current

Ametherm MS22 10008

  • Inrush current limiting thermistor
  • Resistance of 10Ω (at 25°C)
  • Maximum steady state current of 8A up to +25°C
  • Maximum recommended energy of 200J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +194°C at maximum current

Ametherm MS22 12102

  • Inrush current limiting thermistor
  • Resistance of 120Ω ±25% (at 25°C)
  • Maximum steady state current of 2A
  • Maximum recommended energy of 220J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +155°C at maximum current

Ametherm MS22 12103

  • Inrush current limiting thermistor
  • Resistance of 120Ω (at 25°C)
  • Maximum steady state current of 3A
  • Maximum recommended energy of 220J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +165°C at maximum current

Ametherm MS22 12104

  • Inrush current limiting thermistor
  • Resistance of 120Ω (at 25°C)
  • Maximum steady state current of 4A
  • Maximum recommended energy of 220J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +175°C at maximum current

Ametherm MS22 20005

  • Inrush current limiting thermistor
  • Resistance of 20Ω (at 25°C)
  • Maximum steady state current of 5A
  • Maximum recommended energy of 180J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +170°C at maximum current

Ametherm MS22 22103

  • Inrush current limiting thermistor
  • Resistance of 220Ω (at 25°C)
  • Maximum steady state current of 3.5A
  • Maximum recommended energy of 75J
  • Voltage rating from 120VAC to 680VAC
  • Actual energy failure at 175J
  • 1.4Ω at 100% maximum current and 2.75Ω at 50% maximum current
  • Body temperature of +144°C at maximum current

Ametherm MS22 30005

  • Inrush current limiting thermistor
  • Resistance of 30Ω (at 25°C)
  • Maximum steady state current of 5A
  • Maximum recommended energy of 150J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +174°C at maximum current

Ametherm MS22 50004

  • Inrush current limiting thermistor,
  • Resistance of 50Ω (at 25°C)
  • Maximum steady state current of 4A
  • Maximum recommended energy of 240J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +159°C at maximum current

Ametherm MS22 75004

  • Inrush current limiting thermistor
  • Resistance of 75Ω (at 25°C)
  • Maximum steady state current of 4A
  • Maximum recommended energy of 240J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +169°C at maximum current

Ametherm MS32 0R536

  • Inrush current limiting thermistor
  • Resistance of 0.5Ω (at 25°C)
  • Maximum steady state current of 36A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +214°C at maximum current

Ametherm MS32 0R540

  • Inrush current limiting thermistor
  • Resistance of 0.5Ω ±25% (at 25°C)
  • Maximum steady state current of 40A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +244°C at maximum current

Ametherm MS32 10015

  • Inrush current limiting thermistor
  • Resistance of 10Ω (at 25°C)
  • Maximum steady state current of 15A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +224°C at maximum current

Ametherm MS32 15012

  • Inrush current limiting thermistor
  • Resistance of 15Ω (at 25°C)
  • Maximum steady state current of 12A
  • Maximum recommended energy of 250
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +229°C at maximum current

Ametherm MS32 20008

  • Inrush current limiting thermistor
  • Resistance of 20Ω (at 25°C)
  • Maximum steady state current of 8A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +204°C at maximum current

Ametherm MS32 20010

  • Inrush current limiting thermistor
  • Resistance of 20Ω (at 25°C)
  • Maximum steady state current of 10A
  • Maximum recommended energy of 250
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +224°C at maximum current

Manufacturers

Looking for Inrush Current Limiting Thermistors?

The below manufacturers are all of our authorised partners that produce Inrush Current Limiting Thermistors or related products.

Inrush Current Limiting Thermistors

Inrush current limiting thermistors are used for protecting the circuit against occasional current spikes significantly higher than normal operating current, which could otherwise damage the equipment. At Rhopoint Components we offer a range of current limiting resistors from industry-leading manufacturer Ametherm, with various sizes, resistance and maximum steady-state current options available. The Ametherm thermistors compare favourably with traditional inrush current limiters, offering lower current density, faster reset time, wider temperature range and virtually no derating.