NTC Thermistor Transformer Protection

Describing Transformer Protection from Inrush Current Using the NTC Thermistors

Ametherm

This tutorial will provide a problem statement describing the inrush current situation and then provide selection criteria to help chose the correct NTC thermistor for the application.
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Related Parts

ImageManufacturer Part NumberDescriptionPackagingPart StatusR @ 25°CAvailable Quantity
SL10 10003 datasheet linkICL 10 OHM 15% 3A 9.5MMSL10 10003ICL 10 OHM 15% 3A 9.5MMBulkActive10 Ohm7026 - Immediate
SL10 10003 product page link
SL12 10006 datasheet linkICL 10 OHM 20% 6A 12MMSL12 10006ICL 10 OHM 20% 6A 12MMBulkActive10 Ohm6438 - Immediate
SL12 10006 product page link
SL15 60002 datasheet linkICL 60 OHM 20% 2A 15MMSL15 60002ICL 60 OHM 20% 2A 15MMBulkActive60 Ohm5249 - Immediate
SL15 60002 product page link
SL22 2R515 datasheet linkICL 2.5 OHM 20% 15A 22MMSL22 2R515ICL 2.5 OHM 20% 15A 22MMBulkActive2.5 Ohm58189 - Immediate
SL22 2R515 product page link
SL22 1R020 datasheet linkICL 1 OHM 20% 20A 22MMSL22 1R020ICL 1 OHM 20% 20A 22MMBulkActive1 Ohm45758 - Immediate
SL22 1R020 product page link
SL22 2R018 datasheet linkICL 2 OHM 20% 18A 22MMSL22 2R018ICL 2 OHM 20% 18A 22MMBulkActive2 Ohm14835 - Immediate
SL22 2R018 product page link
SL22 5R012 datasheet linkICL 5 OHM 15% 12A 22MMSL22 5R012ICL 5 OHM 15% 12A 22MMBulkActive5 Ohm7587 - Immediate
SL22 5R012 product page link
SL22 50004 datasheet linkICL 50 OHM 20% 4A 22MMSL22 50004ICL 50 OHM 20% 4A 22MMBulkActive50 Ohm6504 - Immediate
SL22 50004 product page link
SL22 4R014 datasheet linkICL 4 OHM 20% 14A 22MMSL22 4R014ICL 4 OHM 20% 14A 22MMBulkActive4 Ohm6178 - Immediate
SL22 4R014 product page link
SL22 10008 datasheet linkICL 10 OHM 20% 8A 22MMSL22 10008ICL 10 OHM 20% 8A 22MMBulkActive10 Ohm3398 - Immediate
SL22 10008 product page link
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PTM Published on: 2012-08-30