CST7030

Document 1101-1
Current Sense Transformers CST7030
• AEC-Q200 Grade 1 qualified (–40°C to +125°C ambient)
• Small surface mount current sensors
• Sensed current up to 20 A; Frequency range up to 1 MHz
• Very low primary DC resistance
• 500 Vrms, one minute isolation (hipot) between windings
• Designed for:
Continuous AC current monitoring in switched-mode power
supply; Overload and short-circuit protection; Current
measurement in traction motor and battery management
systems in conventional and xEV (EV, HEV, FCEV) vehicles.
• Can also be used in 48 V vehicle electrical systems
DCR max
(Ohms)
Turns (N) Inductance2
Part number1
pri : sec
min (mH)
pri sec
CST7030-020L_1 : 20
0.053
0.0015
0.420
CST7030-050L_1 : 50
0.333
0.0015
2.76
CST7030-070L_1 : 70
0.652
0.0015
5.04
CST7030-100L_1 : 100
1.330
0.0015 10.68
CST7030-150L_1 : 150
2.993
0.0015 22.30
1. When ordering, please specify packaging code:
CST7030-150LC
Packaging:C
=7″ machine-ready reel. EIA-481 embossed plastic
tape (600 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. Factory order only, not stocked (2500 parts per
full reel).
2. Inductance measured between secondary pins at 100 kHz, 0.1 Vrms,
0 Adc.
3. Maximum volt-time product is for the secondary, based on 2000 Gauss.
4. Primary current of 20 A causes less than 25°C temperature rise from
25°C ambient. Higher current causes a greater temperature rise (see
Temperature Rise vs Current curve).
5. Terminating resistance (RT) value is based on 1 Volt output with 20 Amps
flowing through the primary. Varying terminating resistance increases or
decreases output Voltage/Ampere according to the following equation:
RT = Vout × Nsec / Iin.
6 Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Frequency Volt-time SensedTerminating
current I 4 resistance R 5
range
product3
in
T
(kHz)
(Vµsec)
max (A)
(Ohms)
78 – 1000
6.4
20
1.0
31 – 1000
16.0
20
2.5
22 – 1000
22.4
20
3.5
16 – 1000
32.0
20
5.0
10 – 1000
48.0
20
7.5
Typical Circuit
I in
4
2
Pri
(1 turn)
Sec
(N turns)
3
1
RT
Vout
Core material Ferrite
Terminations RoHS compliant tin-silver over tin over nickel over phos
bronze
Weight 0.16 g
Ambient temperature –40°C to +125°C
Maximum part temperature +165°C (ambient + temp rise)
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 600/7″ reel; 2500/13″ reel Plastic tape: 16 mm wide,
0.35 mm thick, 8 mm pocket spacing, 3.0 mm pocket depth
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
[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 1101-1 Revised 06/24/15
© Coilcraft Inc. 2016
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 1101-2
CST7030 SMT Current Sense Transformers
Temperature Rise vs Current
45
Temperature rise (from 25°C)
40
35
30
25
20
15
10
5
0
0
5
10
15
20
25
30
Current (A rms)
Dimensions
0.118
max
3,0
0.118
3,0
0.006 /0,15
0.276
max
7,0
0.205
5,2 max
0.010
0,25
0.043
1,1
Recommended
Land Pattern
0.030
0,75
0.047
1,2
1
2
3
0.102
2,60
4
1
0.043
1,1
0.047
1,2
0.043
1,1
0.073
1,85
CL
0.073
1,85
2
0.191
4,85
Dimensions are in
0.067
1,70
0.063
1,6 0.063
1,6
4
0.063
0.063 1,6
1,6
3
0.045
1,15
0.045
1,15
0.191
4,85
inches
mm
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]
Document 1101-2 Revised 06/24/15
© Coilcraft Inc. 2016
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.