Calculators

Select an Inrush Current Limiter - Power Thermistor

Inrush Current Calculators

Step 1
Use the maximum allowable inrush current and Ohm's Law to determine the least allowable resistance at turn on for your application.

Step 2
Determine the maximum steady state current that will flow through the Inrush Current Limiter.

Step 3
Using the formula J = ½CV², determine how much input energy the thermistor will absorb when the device is turned on.

Step 4
Select a part from this list or any of the links to datasheets and get samples or click on a link to get it from one of our worldwide partners.

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	Newark	Farnell
SL03 10001	10.0	1	2	100			3	3	570-1088-ND	72J6655	9006400
SL10 10002	10.0	2	10	700	135		10	5		72J6710	9006966
SL10 10003	10.0	3	17	1,100	300		10	5	570-1082-ND	72J6711	9006974
SL12 10004	10.0	4	40	2,778	694		13	6	570-1079-ND	72J6732
SL22 10005	10.0	5	90	6,251	1,562		22	5	570-1032-ND	72J6817	9008055
SL18 10005	10.0	5	75	5,209	1,302		19	6	570-1068-ND	72J6808	9007962
SL12 10006	10.0	6	40	2,778	694		13	6	570-1078-ND	72J6734	9007202
SL22 10007	10.0	7	90	6,251	1,562		22	5	570-1033-ND	72J6818	9008063
SL22 10008	10.0	8	90	6,000	1,400		22	6	570-1034-ND	72J6819	9008071
MS22 10008	10.0	8	200	13,850	3,473	802	23	10	570-1003-ND	72J6608	9005935
SL22 10009	10.0	9	100	6,946	1,736		22	5	570-1035-ND	72J6820	9008080
SL32 10015	10.0	15	150	10,419	2,604		31	6	570-1058-ND	72J6844	9008322
MS32 10015	10.0	15	250	19,250	4,341	1,003	31	9	570-1014-ND	72J6620	9006052
MS35 10018	10.0	18	500	34,000	8,683	2,007	37	11	570-1024-ND	72J6630	9006150