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© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest information.
Current Sense Transformers
Document 132
Document 132 Revised 11/20/17
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.
DCR max Frequency Volt-time Sensed Terminating
Turns (N) Inductance1 (Ohms) range
product2 current Iin resistance RT3
Part number pri : sec min (mH) pri sec (kHz) (Vµsec) max (A) (Ohms)
CS4050V-01L 1 : 50 5 0.001 0.7 3 – 1000 149 35 1.4
CS4100V-01L 1 : 100 20 0.001 1.4 2 – 1000 298 35 2.9
CS4200V-01L 1 : 200 80 0.001 4.0 1 – 1000 596 35 5.7
CS4 0V-ALxx
XXXX Y
max
0.75
19,05
0.105/0.150
2,67/3,81
0.77
19,56
0.03
0,76
Internal
code
0.40 ±0.01
10,16 ±0,25 4
41
1
2
23
3
max
C
L
C
L
max 0.57
14,48
0.051 ±0.003
1,295 ±0,076
0.041 ±0.003
1,041 ±0,076
0.069
1,76
0.079
2,01
Recommended PC Board Layout
(viewed from top)
0.20 ±0.005
5,08 ±0,125
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
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 (RT) 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:
RT = Vout × Nsec / Iin
3
Sec
(N turns)
Pri
(1 turn)
21
4
RTVout
Iin
Typical Circuit
4. Ambient temperature range –40°C to +85°C.
5. Electrical specifications at 25°C.
