Profile: Ametherm is a manufacturer of inrush current limiting thermistors. We are an ISO 9000:2001 certified company. Our miniAMP inrush current limiter is away to protect components such as relays, diodes and fuses from inrush current. Our bigAMP inrush current limiter absorbs high amounts of inrush current when electrical equipment is turned on by offering a high resistance to current and quickly decreasing the resistance once steady state current begins to flow through the thermistor.