CST7030 Datasheet, PDF (1/2 Pages) Coilcraft lnc. – Current Sense Transformers

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
_{Turn s (N)   Induc tance2} ^D(CORhmmsa)x
Part number¹
pri : sec
min (mH)
pri   sec
CST7030-020L_
CST7030-050L_
CST7030-070L_
CST7030-100L_
CST7030-150L_
1 : 20
1 : 50
1 : 70
1 : 100
1 : 150
0.053
0.333
0.652
1.330
2.993
0.0015
0.0015
0.0015
0.0015
0.0015
0.420
2.76
5.04
10.68
22.30
Frequency
range
(kHz)
78 – 1000
31 – 1000
22 – 1000
16 – 1000
10 – 1000
Volt-time
product³
(Vµsec)
6.4
16.0
22.4
32.0
48.0
Sensed Terminating
  _{current Iin}4   _{resistance RT}5
max (A)
(Ohms)
20
1.0
20
2.5
20
3.5
20
5.0
20
7.5
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.
Typical Circuit
4
2
I_in
Pri
(1 turn)
Sec
(N turns)
R_T
V_out
3
1
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.
US [e-mail] ^notice.
UK +44-1^P23^le6^a-^s7^e30^c5^h9^e5^ck s^oa^ul^re^ws@^ebc^soⁱi^tl^ecr^fa^of^rt-^le^au^tero^sp^t eⁱⁿ.^fc^oo^rm^mation.
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
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.