Inrush current limiters & NTC sensing thermistors showcased at APEC

Highlighted Ametherm inrush current limiters at APEC 2015 will include the company's SL series of standard devices with high steady-state current to 36A, input energy to 300J and diameters from 8 to 31mm. AS series devices on display are designed to increase reliability by eliminating hot spots resulting from fatigue. The current limiters feature extremely high steady-state currents to 50A, 800J of input energy and fast reset times. For single- and three-phase input voltages up to 480VAC, the company will feature the UL-1434-certified SURGE-GARD and MegaSurge series, which offer steady-state current to 36A, up to 300J of input energy, and resistance at 25°C from 0.5 to 220Ω.

Ametherm's NTC sensing thermistors on display will consist of a variety of probe assembly types, including ring lug (PANR series), epoxy (PANE series) and steel housing (PANH series). Constructed of specially formulated metal oxide ceramic materials that are extremely accurate in temperature sensing, the devices feature resistance at 25°C from 0.5 to 250.0Ω, beta from 3,500 to 4,500K, a dissipation constant of 3mW/°C, a thermal time constant down to 10.0s and maximum power of 125mW.

The devices are optimised for a wide range of applications including AC motors, power supplies, motor drives, audio amplifiers, battery chargers, air sensors, HVAC systems, high-speed computers, MRIs and X-ray machines.