1)Meet UL943 requirement to zero-phase current transformer
2)High sensitivity and detect leakage current  of 5 mA
3)Perfect over-leakage feature and resist to shock of  heavy current
4)Operation temperature -35℃～80℃
5)High potential voltage:4000Vac/min
6)ROHS
Application:
1)GFCI
2)Mini circuit breaker
3)Earth leakage protection switch
4)ALCI
5)Earth Leakage module 
According to：                                                             

Part No

A
(min)

B
(max)

C
(max)

D
(max)

E
(±0.2)

F
(±0.3)

G
(±0.2)

H
(±0.2)

I
(±0.2)

CT205

9.30 

21.30 

7.20 

23.85 

50.00 

4.00 

12.00 

CT504

5.70 

17.50 

7.90 

18.75 

14.30 

4.00 

4.60 

CT508

9.60 

25.30 

15.20 

30.00 

10.00 

8.00 

19.00 

CT519

9.00 

22.00 

8.30 

23.00 

20.00 

4.00 

19.00 

17.00 

CT520

12.00 

26.70 

11.00 

26.70 

21.50 

4.00 

20.00 

23.00 

CT512

8.20 

18.00 

6.60 

20.00 

8.00 

12.00 

3.00 

Part No

Rated current 
(A)

 Variety rate of -35~80℃

 Variety rate of magnetization 

Output voltage 
Vo(mV),L(mH)

Test condition 

CT205

30/50

-10%~10%

-10%~0%

≥11

Iin=8mA,RL=4.7KΩ

CT504

30

-10%~10%

-10%~0%

≥50

Iin=20mA,RL=100KΩ

CT508

30/60

-10%~10%

-10%~0%

≥200

Iin=15mA,RL=47KΩ

CT519

30/50

-10%~10%

-10%~0%

≥16.5

Iin=25mA,RL=1KΩ

CT520

30/50

-10%~10%

-10%~0%

≥19~24

Iin=25mA,RL=1KΩ

CT512

30/50

-10%~10%

-10%~0%

19~22.5

Iin=30mA,RL=750Ω