High Frequency
:: C S T 2 0 6 / 3 0 6 D e s c r i p t i o n
Designed for switching power supply applications, Triad current sense
transformers are used to detect the current passing through a conductor.
These transformers are very reliable and operate effectively over the
frequency range of 20 kHz-200 kHz. They are constructed of UL rated
130ºC materials. Both models are available with a center tap option.
Section/
Figure
Type
No.
ET VμSEC
REF 20 kHz
Tuurns
Count
Min.
Ind. mH
DCR Max. Ohms
Pri. Amps
A
B
A
B
A
B
B
A
B
A
B
A
CST206-1A
CST206-1T
CST206-2A
CST206-2T
CST206-3A
CST206-3T
CST306-1A
CST306-1T
CST306-2A
CST306-2T
CST306-3A
CST306-3T
2000
2000
4000
4000
6000
6000
500
500
1000
1000
2000
2000
100
100 CT
200
200 CT
300
300 CT
50
50 CT
100
100 CT
200
200 CT
14.0
14.0
56.0
56.0
130.0
130.0
3.5
3.5
14.0
14.0
55.0
55.0
.580
.580
3.500
3.500
12.400
12.400
.340
.580
1.550
1.550
3.750
3.750
110.0 RMS
110.0 RMS
80.0 RMS
80.0 RMS
70.0 RMS
70.0 RMS
35.0 RMS
35.0 RMS
25.0 RMS
25.0 RMS
25.0 RMS
25.0 RMS
Figure A
Figure B
:: O u t l i n e D i m e n s i o n s
Te c h n i c a l N o t e s
1. Derate ET product by 32% for 50 kHz, 52% for 100 Hz and 50%
for unidirectional operation.
2. Rated primary current renders approximately 40ºC temperature rise.
:: C S E 5 D e s c r i p t i o n
Designed to monitor current at 250 kHz and
above. These transformers have a primary current
rating of 10 Amps.
3. CST206 models have maximum recommended terminating
resistance of 1 ohm per turn.
4. Primary is inserted through hole in casing.
5. 3 pin or center tapped (CT) models are designed with a T suffix.
Part
No.
Turns
N1:N2
@ 10kHz
Secondary
Inductance
μH Min.
Secondary
DCR
m1 Max
CSE5-100201
CSE5-100301
CSE5-100401
CSE5-100501
CSE5-100601
CSE5-100701
CSE5-101001
CSE5-101251
1:20
1:30
1:40
1:50
1:60
1:70
1:100
1:125
80
180
320
500
720
980
2000
3000
550
870
1140
1500
1750
4750
5500
8500
:: O u t l i n e D i m e n s i o n s
Te c h n i c a l N o t e s
{mm}
www.TriadMagnetics.com | 22520 B Temescal Canyon Road, Corona, CA 92883 | Phone 951-277-0757 | FAX 951-277-2757
1 3 | Current Sense Transformers / High Frequency
C u r r e n t S e n s e Tr a n s f o r m e r s
1 4 | Current Sense Transformers / Low Frequency
C u r r e n t S e n s e Tr a n s f o r m e r s
Low Frequency
Class B
U L Fi l e : E 2 0 5 3 4 9
CSE187L Performance Graph
100%
400 Hz
:: C S E 1 8 7 L D e s c r i p t i o n
Designed to monitor current in low frequency
applications. This Triad part may be used to
monitor current from .1 to 30 ampheres at
frequencies from 50 Hz to 400 Hz.
90%
60 Hz
80%
50 Hz
70%
60%
0.1
0.5
1
2
5
7
10
15
20
30
Primary Current - AC Amps
:: O u t l i n e D i m e n s i o n s
Te c h n i c a l N o t e s
1. Turns ratio: Primary to sense 1:500
2. Suggested burden resistor: 60 ohms.
3. Typical ouput: 110 mV /Amp.
7. Hi-pot: 2,500 volts wdg-wdg.
8. Potted version available with a
dielectric strength of 4,000 volts
wdg-wdg.
4. Primary DCR: 250 μOhms maximum.
5. Sense DCR: 21 ohms maximum.
6. Constructed with UL recognized materials
(Class B, 130ºC).
:: C S T S e r i e s D e s c r i p t i o n
Triad current sense transformers are used to detect the current passing through
a conductor. These transformers are very reliable and operate effectively between
50-60 Hz. They are constructed of UL rated 130ºC materials.
:: S p e c i f i c a t i o n s
Part No.
Ip
Amps
Turns
Ratio
Terminating
Resistor
Ohms
Watt
DCR
(Ohms)
Nominal
Volts/Amp @ rated Lp for
various loads
100
500
2K
5K
Net
Weight
(grams)
REF
Case Dimensions – mm
A
B
C
D
E
F
CST-1005
5
1000:1
100
0.0025
40.00
0.0958
0.4490
1.3694
1.8402
20.0
23.50
24.80
12.00
15.00
7.50
8.50
CST-1010
10
1000:1
100
0.0100
40.00
0.0969
0.4565
0.9686
1.1912
20.0
23.50
24.80
12.00
15.00
7.50
8.50
CST-1015
15
1000:1
100
0.0230
40.00
0.0971
0.4429
0.7508
0.9439
20.0
23.50
24.80
12.00
15.00
7.50
8.50
CST-1020
CST-1025
20
25
1000:1
1000:1
100
100
0.0400
0.0630
40.00
46.00
0.0977
0.0976
0.3943
0.4364
0.6174
0.7496
0.7662
0.9664
20.0
30.0
23.50
30.20
24.80
30.20
12.00
14.30
12.00
20.32
7.50
10.16
8.50
11.40
CST-1030
30
1000:1
100
0.0900
46.00
0.0977
0.4160
0.6710
0.8750
30.0
30.20
30.20
14.30
20.32
10.16
11.40
Ip: Primary Current
:: O u t l i n e D i m e n s i o n s
Te c h n i c a l N o t e s
1. Pin length: 5 ±1mm
2. Pin diameter: 0.8 ±0.1mm
3. Pin 3 normally for mechanical
support only
www.TriadMagnetics.com | 22520 B Temescal Canyon Road, Corona, CA 92883 | Phone 951-277-0757 | FAX 951-277-2757