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Current limiting thermistors handle 36A currents
25th June 2014
Mick Elliott
Digi-Key is now stocking Ametherm’s SURGE-GARD series of NTC inrush current limiting thermistors. The SURGE-GARD series devices are capable of handling high steady-state currents to 36 A and input energy to 250 J. Available in multiple leaded package options with maximum diameters from 7.6 mm to 31.75 mm, the components offer resistance at +25 °C (R25) from 0.4 Ω to 220 Ω with tolerances down to ±10%, maximum operating voltage to 265 VRMS, and beta from 3000 °K to 3965 °K.
Constructed of specially formulated metal oxide ceramic materials, RoHS-2- and REACH-compliant SURGE-GARD thermistors are optimized for a wide variety of applications that require inrush current limiting to reduce noise and circuit failure — including switching power supplies, AC motors, motor drives, audio amplifiers, and battery chargers. In these applications, the devices lower rectifier costs by reducing the required peak forward-surge-current rating.
"The SURGE-GARD series has delivered reliable circuit protection to the electronics industry for over forty years, and we are excited to see that tradition continue with Ametherm," said Tom Busher, vice president, global IP&E of Digi-Key.
"Digi-Key has earned a worldwide reputation as the go-to source for electronic components, and we are proud to have the company stocking our SURGE-GARD line," said Mehdi Samii, vice president of engineering at Ametherm. "Over the years, the industry has come to rely on these thermistors for unmatched circuit protection, and we will continue to manufacture them with the same metal oxide mixtures that have produced the high-quality that Digi-Key's customers have come to expect."
