3111 N. Deer Run Road, Suite 4
Carson City, NV USA 89701
800-808-2434 / 775-884-2434
Fax 775-884-0670 / www.ametherm.com
Ametherm’s bigAMP™ Inrush Current Limiters
are specially designed to withstand up to 36
amperes of continuous current and 260 joules
of input energy.
The bigAMP Inrush Current Limiter is useful in:
File No. CA 110861
➤
➤
➤
Switching power supplies
AC Motors
Uninterruptible Power Supplies
Frequency Generators
Other equipment that can be improved
with inrush current protection
File No. E209153
➤
➤
How does the
bigAMP
Inrush Current
Limiter work?
When electrical equipment is turned on, the
bigAMP Inrush Current Limiter absorbs high
amounts of inrush current 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 of 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.
One example of a typical circuit for limiting
inrush current.
How to specify
the right bigAMP
Inrush Current
Limiter for your
application:
➤
Use the maximum allowable inrush
current and Ohm’s Law to determine
the least allowable resistance at turn
on for your application.
➤
Using the formula J=
1
/
2
CV
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
Inrush Current Limiter.
Another example of a typical circuit for limiting
inrush current.
➤
Select the Inrush Current Limiter that will work for your application.
Circuit Protection Thermistors
Inrush Current
Limiting for:
➤
➤
File No. CA 110861
Switching Power Supplies
AC Motors
UPSs
Frequency Generators
➤
➤
File No. E209153
Ametherm – USA
Corporate Headquarters
3111 N. Deer Run Rd., Suite 4
Carson City, NV 89701
U.S.A.
bigAMP Inrush Current Limiter Electrical Specifications
Part
Number
SL32
SL32
SL32
SL32
SL32
SL32
SL32
SL32
SL32
0R230
0R530
0R536
1R030
1R036
2R023
2R025
5R020
10015
R@
25°C
0.2
0.5
0.5
1.0
1.0
2.0
2.0
5.0
10.0
Max
SSI
30.0
30.0
36.0
30.0
36.0
23.0
25.0
20.0
15.0
Max
Joules
100
180
250
175
250
180
220
200
150
Resistance at % of Max Steady State Current
100%
0.010
0.013
0.010
0.014
0.010
0.022
0.016
0.034
0.048
90%
0.013
0.014
0.011
0.015
0.012
0.025
0.023
0.037
0.058
80%
0.015
0.016
0.012
0.016
0.013
0.029
0.026
0.043
0.064
70%
0.018
0.019
0.015
0.018
0.015
0.034
0.031
0.056
0.074
60%
0.021
0.023
0.018
0.024
0.018
0.041
0.037
0.069
0.089
50%
0.025
0.028
0.023
0.030
0.024
0.052
0.049
0.082
0.102
800-808-2434
Tel: 775-884-2434
Fax: 775-884-0670
Ametherm – Europe
Thomatronik
Brückenstrasse 1
D83022 Rosenheim
GERMANY
Tel: +49 8031-2175-10
Fax: +49 8031-2175-30
bigAMP Inrush Current Limiter Mechanical Specifications
Ametherm – Europe
Sequoia Technology Ltd.
Basingstoke Road
Spencers Wood, Reading
Berks
ENGLAND RG71PW
Tel: +44 1883-7228-22
Fax: +44 1189-7690-20
Ametherm – Asia
Cost Effective Solutions
Ltd.
Rm. 1034,10/F Nan Fung Centre
264-298 Castle Peak Road
Tsuen Wan, New Territories
HONG KONG
Tel: +852 241-11998
Fax: +852 241-10278
Ametherm –
Middle East
RAPAC Electronics Ltd.
60 Amal Street, PO Box 4127
Kiryat Arie, Petach Tikva
ISRAEL 49130
Tel: +972 3-9203-456
Fax: +972 3-9203-443
www.ametherm.com
Copyright ® Ametherm 2003. All rights reserved.
Made in the U.S.A.
京公网安备 11010802033920号
EEWORLD
