COILCRAFT CST2

Document 385-1
SMT Current Sensors – CST Series
• For use from 50 kHz to nearly 1 MHz
• Two different pinouts to meet the requirements of different
applications.
• Low primary DC resistance; 500 V isolation between windings.
Designer’s Kit C389 contains 2 each of each part
Core material Ferrite
Terminations See Note 1.
Weight 0.4 g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 250/7″reel;1000/13″ reel; Plastic tape: 16 mm wide,
0.35 mm thick, 12 mm pocket spacing, 5.6 mm pocket depth
PCB washing Only pure water or alcohol recommended
Sensed
Terminating
Volt-time
1
Part number Turns (N) Inductance2 DCR max (Ohms) current3 resistance RT4 product5Color
CST1
CST2
pri : sec
min (µH)
Primary
Secondary Iin (A)(Ohms) (V-µsec)dot
CST1-020L_ CST2-020L_1 : 20
81 0.00070.400 10
2.0
16 Red
CST1-030L_ CST2-030L_1 : 30
180 0.00070.870 10
3.0
24Orange
CST1-040L_ CST2-040L_1 : 40 320 0.00071.14 10
4.0
32 Yellow
CST1-050L_ CST2-050L_1 : 50 500 0.00071.50 10
5.0
41 Green
CST1-060L_ CST2-060L_1 : 60 730 0.00071.98 10
6.0
49 Blue
CST1-070L_ CST2-070L_1 : 70 980 0.00074.75 10
7.0
57 Violet
CST1-100L_ CST2-100L_1 : 100 2000 0.00075.50 10 10.0
81 Gray
CST1-125L_ CST2-125L_1 : 125 3000 0.00076.50 10 12.5 101 Black
1. When ordering, please specify termination and packaging codes:
CSTX-125LC
Termination:L=RoHS compliant tin-silver over tin over nickel over phos
bronze (pins 1 – 6); RoHS compliant tin-silver over tin
over nickel over copper (pins 7 – 8)
Special order: S = non-RoHS tin-lead (63/37) over tin
over nickel over phos bronze (pins 1 – 6); nonRoHS tinlead over gold over nickel over copper (pins 7 – 8).
Packaging:C
=7″ machine-ready reel. EIA-481 embossed plastic
tape (250 parts per full reel).
B=Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter C instead.
D
=13″ machine-ready reel. EIA-481 embossed plastic
tape (1000 parts per full reel).
2. Inductance measured between secondary pins at 100 kHz, 0.1 Vrms.
3. Primary current of 10 A causes approximately 25°C temperature rise
from 25°C ambient. Higher current causes a greater temperature rise
(see Temperature Rise vs Current curve).
4. Terminating resistance (RT) value is based on 1 Volt output with
10 Amps flowing through the primary. Varying terminating resistance
increases or decreases output Voltage/Ampere according to the following equation: RT (Ohms) = Vout × Nsec / Iin.
5. Maximum volt-time product for the secondary.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Typical Circuits
CST1
I in
8
6
Pri
(1 turn)
Sec
(N turns)
7
4
8
1
Pri
(1 turn)
Sec
(N turns)
7
3
RT
Vout
RT
Vout
CST2
I in
[email protected]
subject to change without notice.
US +1-847-639-6400
Please check [email protected]
our website for latest information.
UK +44-1236-730595
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 385-1 Revised 11/17/11
© Coilcraft Inc. 2013
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.
Document 385-2
CST Series Current Sensors
Temperature rise (from 25°C)
Temperature Rise vs Current
Pinouts
80
CST1
CST2
70
8
7
60
3
4
3
4
1
6
1
6
50
40
30
20
10
0
0
2
4
6
8
10
12
14
16
18
7
8
Bottom View
Bottom View
20
Current (A rms)
Dimensions
0.235 max
5,97
Color dot by
pin 1 indicates
part number
0.245 max
6,22
0.209
max
5,3
0.315
max
8,0
0.004 / 0,10
0.320
max
8,13
Recommended Land Pattern
0.118
3,0
0.023 ±0.008
0,6 ±0,2
0.073 ±0.008
1,85 ±0,2
0.098
2,5
0.106
2,7
0.073
1,85
0.047
1,2
0.079 ±0.008
2,0 ±0,2
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
0.063
1,6
0.051
1,3
0.051
1,3
Document 385-2 Revised 11/17/11
© Coilcraft Inc. 2013
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.