Document 131
Current Sensors - D18XX, CS1XXX Series
Designed for use at 20 kHz to 50 kHz and higher, these
sensors function as the secondaries of a current trans-
former. The conductor carrying the current to be mea-
sured is the “one turn primary.” Sensitivity can be set at 1
Volt per Ampere or at other desired values. It can also be
doubled by looping the conductor through the hole twice.
Applications include sensing branch circuit overload,
switcher feedback, and detecting load drop or shutdown.
They come in a molded version (CS1XXX Series) or
lower cost encapsulated model (D18XX Series). Mini-
mum wall thickness of the hole is 0.5 mm that meets
IEC380, VDE 0730 and other requirements when used
with an insulated conductor.
Coilcraft
Designer’s Kit P203
contains samples of the
CS1050, 1100 and 1200 sensors, current transformer
versions with equivalent ratings, plus two 50/60 Hz
current sensors. To order, contact Coilcraft.
Sensed
current
max (A)
10
24
35
10
24
35
30
Part
number
D1869
D1870
D1871
CS1050
CS1100
CS1200
CS1750
Turns
50
100
200
50
100
200
750
Inductance
(mH)
5
20
100
5
20
100
1125
Sensitivity
Vout
Iin
(V)
(A)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Terminating
resistor
R
T
(Ohms)*
50
100
200
50
100
200
750
Color
code
Green
Brown
Red
* Varying terminating resistance will increase or decrease output voltage/ampere in conductor. Effect is essentially linear over a restricted
operating range. Frequency response is also affected by varying terminating resistance.
D1xx Series
0.465
max
11,81
Date code
0.20
min
5,08
B
A
Color
Code
0.033 ±0.002
0,84 ±0,05
max
3
0.50 ±0.015
12,7 ±0,38
1
0.80 max
20,30
0.75 max
19,05
CS1xxx Series
0.375
max
9,53
0.70 max
17,8
B
A
0.20
max
5.08
3
0.158/0.218
4,01/5,54
3
0.50 ±0.015
12,7 ±0,38
0.80
max
20,3
1
0.34
max
8,64
3
0.125
max
3,175
0.45
11,43
0.036/0.030
0,91/0,76
I
A
1+
Test
Circuit
B
3-
R
T
V
OUT
p-p
Leads 3 and A are in phase per orientation shown above.
Specifications subject to change without notice.
Please check our website for latest information.
Document 131
Revised 02/24/03
© Coilcraft, Inc. 2005
Industrial Control Electronics
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