Bigamp Datasheet
| Ametherm's bigAMP Inrush Current Limiters are specially designed thermistors able to withstand up to 36 amperes of continuous current and 260 joules of input energy. | ||||||||||||
 The bigAMP Inrush Current Limiter is useful in:
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| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SL22 0R516 | 0.5 | 16 | 160 | 10,000 | 2,480 | 22 | 6 | 570-1031-ND | 72J6814 | ||
| SL32 0R530 | 0.5 | 30 | 150 | 10,419 | 2,604 | 31 | 5 | 570-1056-ND | 72J6840 | ||
| SL22 0R712 | 0.7 | 12 | 120 | 8,335 | 2,083 | 22 | 6 | 570-1031-ND | 72J6815 | 9008039 | |
| SL22 1R020 | 1.0 | 20 | 65 | 4,400 | 1,000 | 22 | 6 | 570-1041-ND | 72J6816 | 9008047 | |
| SL32 1R030 | 1.0 | 30 | 160 | 11,114 | 2,778 | 31 | 5 | 570-1059-ND | 72J6842 | 9008306 | |
| SL32 1R036 | 1.0 | 36 | 160 | 11,114 | 2,778 | 31 | 6 | 570-1060-ND | 72J6843 | 1653461 | |
| SL22 2R018 | 2.0 | 18 | 90 | 6,000 | 1,400 | 22 | 6 | 570-1044-ND | 72J6826 | 1653455 | |
| SL32 2R023 | 2.0 | 23 | 250 | 17,366 | 4,341 | 31 | 6 | 570-1061-ND | 72J6845 | 9008330 | |
| SL32 2R025 | 2.0 | 25 | 300 | 20,839 | 5,209 | 31 | 6 | 570-1062-ND | 72J6846 | 9008349 | |
| SL22 2R510 | 2.5 | 10 | 90 | 6,000 | 1,400 | 22 | 6 | 570-1046-ND | 72J6828 | ||
| SL22 2R515 | 2.5 | 15 | 90 | 6,000 | 1,400 | 22 | 6 | 570-1047-ND | 72J6829 | 9008179 | |
| SL22 4R014 | 4.0 | 14 | 100 | 6,400 | 1,500 | 22 | 6 | 570-1050-ND | 72J6833 | 9008217 | |
| SL22 5R012 | 5.0 | 12 | 100 | 6,400 | 1,500 | 22 | 6 | 570-1053-ND | 72J6836 | 9008241 | |
| SL32 5R020 | 5.0 | 20 | 200 | 13,893 | 3,473 | 31 | 6 | 570-1064-ND | 72J6848 | 9008365 | |
| SL22 7R010 | 7.0 | 10 | 100 | 6,400 | 1,500 | 22 | 6 | 570-1055-ND | 72J6839 | 1653458 | |
| SL22 10008 | 10.0 | 8 | 90 | 6,000 | 1,400 | 22 | 6 | 570-1034-ND | 72J6819 | 9008071 | |
| SL32 10015 | 10.0 | 15 | 150 | 10,419 | 2,604 | 31 | 6 | 570-1058-ND | 72J6844 | 9008322 | |
| SL22 14007 | 14.0 | 7 | 75 | 4,800 | 1,200 | 22 | 6 | 570-1039-ND | 72J6824 | 9008128 | |
| SL22 16004 | 16.0 | 4 | 100 | 6,500 | 1,500 | 22 | 7 | 570-1040-ND | 72J6825 | 9008136 | |
| SL22 30005 | 30.0 | 5 | 80 | 5,200 | 1,300 | 22 | 6 | 570-1048-ND | 72J6832 | 9008209 | |
| SL22 50004 | 50.0 | 4 | 80 | 5,200 | 1,300 | 22 | 7 | 570-1051-ND | 72J6837 | ||
| SL22 60003 | 60.0 | 3 | 72 | 4,800 | 1,200 | 22 | 7 | 570-1054-ND | 72J6838 | ||
| SL22 12103 | 120.0 | 3 | 80 | 5,200 | 1,300 | 22 | 6 | 570-1037-ND | 72J6822 | 9008101 |
How Does the bigAMP Inrush Current Limiter Work?
The bigAMP Inrush Current Limiter absorbs high amounts of inrush current when electrical equipment is turned on by offering a high resistance to current and quickly decreasing in resistance once steady state current begins to flow through the thermistor.
In a switching power supply, the instantaneous surge energy is caused by the large input filter capacitors and AC input voltage.
During the absorption of energy, the initial high resistance of the thermistor drops within milliseconds to a negligible resistance in preparation of allowing high levels steady state current to flow with a minimal loss of power through the circuit.
The bigAMP Inrush Current Limiter will absorb up to 260 joules of input energy and carry 36 amperes of steady state current.
How to specify the right bigAMP Inrush Current Limiter for your application:
- Use the maximum allowable surge current and Ohm's Law to determine the least allowable resistance at turn on for your application.
- Using the formula J = .5CV^2, determine how much input energy the thermistor will absorb when the device is turned on.
- Determine the maximum steady state current that will flow through the bigAMP Inrush Current Limiter.
- Select the bigAMP Inrush Current Limiter that will work for your application.
ISO 9001: 2008