Document 132
Current Sense Transformers
These low cost Coilcraft current sensing transformers
are designed for use up to 1 MHz. They incorporate the
current and sense windings in one small, encapsulated
package requiring minimum board space.
Coilcraft current sensing transformers are designed to
meet UL/CSA/IEC 60950 Reinforced Insulation specifi-
cation and provide 3 mm creepage/clearance between
primary and secondary windings. Winding to winding
isolation (hipot) is 3750 Vrms, tested for one minute.
Applications include feedback control, overload sensing,
detecting load drop or shutdown, and proportional output.
Coilcraft
Designer’s Kit P403
contains the three stan-
dard current sensing transformers, sensor-only versions
of each, plus two 50/60Hz current sensors. To order,
contact Coilcraft or visit
http://order.coilcraft.com.
Part number
CS4050V-01L
CS4100V-01L
CS4200V-01L
Turns (N)
pri : sec
1 : 50
1 : 100
1 : 200
Inductance
1
min (mH)
5
20
80
DCR max
(Ohms)
pri
sec
0.001
0.001
0.001
0.7
1.4
4.0
Frequency
range
(kHz)
3 – 1000
2 – 1000
1 – 1000
Volt-time
product
2
(Vµsec)
149
298
596
Sensed
current
I
in
max (A)
35
35
35
Terminating
resistance R
T
3
(Ohms)
1.4
2.9
5.7
1. Inductance is for the secondary, measured at 15.75 kHz, 1 Vrms.
2. Volt-time product is for the secondary, based on 2000 Gauss.
3. Terminating resistance (R
T
) value is based on 1 Volt output with 35 Amps
flowing through the primary. Varying terminating resistance increases or
decreases output Voltage/Ampere according to the following equation:
R
T
= V
out
× N
sec
/
I
in
4. Ambient temperature range –40°C to +85°C.
5. Electrical specifications at 25°C.
Typical Circuit
2
1
CS4
xx
0V-AL
0.75
max
19,05
I
in
Pri
(1 turn)
3
Sec
(N turns)
4
R
T
V
out
Internal
code
XXXX Y
0.105/0.150
2,67/3,81
Recommended PC Board Layout
(viewed from top)
2
0.77
max
19,56
0.40 ±0.01
10,16 ±0,25
0.03
0,76
0.57
max
14,48
C
L
1
0.069
1,76
0.20 ±0.005
5,08 ±0,125
0.051 ±0.003
1,295 ±0,076
3
4
C
L
0.041 ±0.003
1,041 ±0,076
0.079
2,01
3
4
2
1
0.30 ±0.005
7,62 ±0,125
0.060 × 0.460
1,52 × 11,68
Weight:
8.8 – 9.3 g
Terminations:
Tin-silver over copper
Packaging:
29 per tube
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 132
Revised 11/20/17
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.