Inrush Current Limiters

  • Provides a simple one-component alternative to using wirewound resistors with timers and relays, MegaSurge series inrush current limiting NTC thermistors reduce costs and greatly simplify designs.
  • In addition, they increase safety by eliminating the fire hazard associated with failed relays.
  • While traditional thermistors are only certified for input voltages from 85 VAC to 265 VAC, UL-recognized MegaSurge devices are certified for single- and three-phase input voltages up to 480 VAC.
  • In addition, they have the ability to withstand high steady-state currents to 36 A and up to 300 J of input energy.
  • These specifications are the highest of any single-solution inrush current limiting device on the market.

Target Applications:  Inrush Current Protection of Power Supplies, Motor Controllers, Audio Amplifiers, Battery Chargers, Frequency Generators, Plasma Cutting Tools,  MRI Machines and, Toroidal Transformers.

Part R SSI
Max
Joules
Max
Max Cap
120 vac
Max Cap
240 vac
Max Cap
480 vac
D Max
(mm)
T Nom
(mm)
Digikey Mouser Farnell
MS32 2R025 2.0 25 300 20,700 5,209 1,204 31 10 570-1019-ND 995-MS32-2R025 9006079
MS32 5R020 5.0 20 300 20,700 5,209 1,204 31 7 570-1021-ND 995-MS32-5R020 9006109
MS32 7R015 7.0 15 250 17,000 4,341 1,003 31 10 570-1022-ND 995-MS32-7R015
MS22 10008 10.0 8 200 13,850 3,473 802 23 10 570-1003-ND 995-MS22-10008 9005935
MS32 10015 10.0 15 250 19,250 4,341 1,003 31 9 570-1014-ND 995-MS32-10015 9006052
MS32 15012 15.0 12 250 17,300 4,341 1,003 31 10 570-1015-ND 995-MS32-15012
MS22 20005 20.0 5 180 12,000 3,125 722 23 8 570-1007-ND 995-MS22-20005 9005978
MS32 20008 20.0 8 250 17,300 4,341 1,003 31 10 570-1017-ND 995-MS32-20008
MS32 20010 20.0 10 250 17,000 4,341 1,003 31 10 570-1018-ND 995-MS32-20010 9006095
MS15 30004 30.0 4 135 9,300 2,344 541 17 8 570-1001-ND 995-MS15-30004
MS22 30005 30.0 5 150 10,300 2,604 602 23 9 570-1009-ND 995-MS22-30005
MS15 40004 40.0 4 135 9,300 2,344 541 17 8 570-1002-ND 995-MS15-40004
MS22 50004 50.0 4 240 16,400 4,167 963 23 10 570-1010-ND 995-MS22-50004 9006001
MS32 50006-L 50.0 6 250 19,250 4,341 1,003 31 7 995-MS32-50006-L
MS22 75004 75.0 4 240 16,400 4,167 963 23 9 570-1011-ND 995-MS22-75004 9006010
MS22 12102 120.0 2 220 15,000 3,820 883 23 10 570-1004-ND 995-MS22-12102
MS22 12103 120.0 3 220 15,000 3,820 883 23 10 570-1005-ND 995-MS22-12103 9005951
MS22 12104 120.0 4 220 15,220 3,820 883 23 10 570-1006-ND 995-MS22-12104 9005960
MS12 15102 150.0 2 110 7,500 1,910 441 14 9 570-1000-ND 995-MS12-15102
MS22 22103 220.0 4 75 5,100 1,302 301 23 10 570-1008-ND 995-MS22-22103
Part R SSI
Max
Joules
Max
Max cap
120 vac
Max cap
240 vac
D Max
(mm)
T Nom
(mm)
Digikey Mouser Farnell
MS35 0R550 0.5 50 900 62,000 15,629 37 9 570-1023-ND 995-MS35-0R550 9006133
MS35 1R040 1.0 40 800 55,000 13,893 37 11 570-1025-ND 995-MS35-1R040 9006141
MS35 2R035 2.0 35 750 51,900 13,024 37 7 570-1027-ND 995-MS35-2R035 9006168
MS35 3R030 3.0 30 750 51,600 13,024 37 10 570-1028-ND 995-MS35-3R030 9006184
MS35 5R025 5.0 25 600 41,250 10,419 38 10 570-1029-ND
MS35 10018 10.0 18 500 34,000 8,683 37 11 570-1024-ND 995-MS35-10018 9006150
MS35 20010 20.0 10 500 34,000 8,683 37 11 570-1026-ND 995-MS35-20010 9006176