Square transformers 220v 3v Ac 18 0 18v 12v 50hz Transformator Ei Core Transformer
This versatile EI core transformer is designed to provide reliable voltage conversion for various electronic applications. With a primary voltage of 220V AC at 50Hz, it offers multiple secondary output options including 3V, 12V, and 18-0-18V, making it highly adaptable for different power supply needs. The square-shaped design with EI core construction ensures excellent electromagnetic shielding and stable performance. Built with high-quality copper windings and premium silicon steel sheets, this transformer delivers consistent power output while maintaining low temperature rise during operation. Perfect for DIY projects, industrial control systems, audio equipment, and other electronic devices requiring step-down voltage transformation. The compact form factor allows for easy installation while meeting safety and efficiency standards. Each unit undergoes strict quality testing to ensure durability and reliable long-term performance.
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Designed as a safety isolating transformer with separate insulated windings and prepared for class II equipment.
Short circuit and overload protected with thermal fuse on primary side. Up to 50% less weight than a similar conventional transformer.Low magnetisation currents and no-load losses.






Product Name |
EI laminated Tube Power Transformer |
Model No. |
EI 66x28 |
Rated Input Voltage |
0-220V(custom available) |
Rated Output Voltage |
12 0 12V (custom available) |
Frequency |
50/60Hz |
Rated Power |
30VA (custom available) |
Dimension |
L68XW54XH59 MM |
Weight |
0.93kgs |
Insulation Class |
Class B/Class F/Class E |
Ambient temperature |
Ta=25°C |
HI-POT test |
4000VAC |
Degree of protection |
IP00 |
Certificate |
CE Rohs ISO |
Standard |
EN61558, EN61000,IEC52321 |
Custom Made |
Yes |
Raw Material |
Full copper enameled wire, cold rolled grant oriented silicon steel lamination iron core, flame-retardant EI bobbin, high insulation tape, Iron mounting bracket |
Features |
High Quality, Small size, light weight, low noise, low no-load, low magnetic leakage, shielding, low temperature rise, high efficiency, low price, high performance |
Application |
1.Audio equipment , Vacuum tube amplifier , Celling Speaker, loudspeaker, Guitar , DVD player , Multimedia audio system , Broadcast system , Monitor security system, signal 2.Switching-mode power supply (SMPS) , Switching AC-DC adapter , Electronics power board , chargers, energy control , energy saving system
3.Medical equipment, dental chair, dental equipment, medical chair, lift chair, medical bed, hospital bed, medical lab equipment, patient monitoring equipment, instrument equipment, beauty salon spa equipment, Washing machine
4.Decorative lighting, Stage light, lighting control, LED , Traffic Light, Street Lighting
5. Home appliance, water dispenser,household blender,air-conditioner,mainframe computer, Garage door, Automatic door, Electric curtain
|




Model |
Specification |
Dimension(MM) |
Power (W) |
||||||||||||
A |
B |
C |
D |
E |
I |
J |
|||||||||
EI 28
|
ei 2812 |
30 |
26 |
27 |
51 |
41 |
7 |
3 |
1W |
||||||
ei 2815 |
30 |
29 |
27 |
51 |
41 |
7 |
3 |
1.5W |
|||||||
ei 2818 |
30 |
32 |
27 |
51 |
41 |
7 |
3 |
2W |
|||||||
EI 35
|
ei 3510 |
37 |
27.4 |
31 |
59 |
49 |
6.4 |
4 |
1W |
||||||
ei 3515 |
37 |
32.4 |
31 |
59 |
49 |
7 |
4 |
2.5W |
|||||||
ei 3518 |
37 |
35.4 |
31 |
59 |
49 |
7 |
4 |
3W |
|||||||
EI 41
|
ei 4116 |
43 |
34 |
35 |
65.3 |
55 |
6.3 |
4 |
4.5W |
||||||
ei 4120 |
43 |
37.8 |
35 |
67 |
55 |
6.3 |
4 |
6W |
|||||||
ei 4126 |
43 |
44 |
35 |
67 |
55 |
6.3 |
4 |
9W |
|||||||
EI 48
|
ei 4820 |
50 |
38.3 |
43 |
75 |
63 |
8 |
4 |
10W |
||||||
EI57 |
ei 4824 |
50 |
42.5 |
43 |
75 |
63 |
8 |
4 |
12W |
||||||
ei 4830 |
50 |
49 |
43 |
75 |
63 |
8 |
4 |
17W |
|||||||
ei 4835 |
50 |
54 |
43 |
75 |
63 |
8 |
4 |
20W |
|||||||
EI 57
|
ei 5719 |
59 |
42.5 |
50 |
84 |
74 |
8 |
4 |
12W |
||||||
ei 5725 |
59 |
49 |
50 |
84 |
74 |
8 |
5 |
20W |
|||||||
ei 5730 |
59 |
59 |
51 |
91 |
74 |
10 |
5 |
28W |
|||||||
ei 5735 |
59 |
59 |
51 |
91 |
74 |
10 |
5 |
36W |
|||||||
EI 66
|
ei 6628 |
68 |
54 |
59 |
98 |
82 |
10 |
5 |
30W |
||||||
ei 6632 |
68 |
58 |
59 |
98 |
82 |
10 |
5 |
40W |
|||||||
EI76 |
ei 6636 |
68 |
62 |
59.3 |
98 |
82 |
10 |
5 |
50W |
||||||
ei 6640 |
68 |
66 |
59.3 |
98 |
82 |
10 |
5 |
56W |
|||||||
ei 6645 |
68 |
71 |
59.3 |
98 |
82 |
10 |
5 |
68W |
|||||||
EI 76
|
ei 7632 |
78 |
64 |
67 |
110 |
95 |
10 |
5 |
52W |
||||||
EI86 |
ei 7638 |
78 |
70 |
67 |
110 |
95 |
10 |
5 |
70W |
||||||
ei 7642 |
78 |
74 |
67 |
110 |
95 |
10 |
5 |
80W |
|||||||
ei 7645 |
78 |
76 |
67 |
110 |
95 |
10 |
5 |
90W |
|||||||
EI 86
|
ei 8636 |
86 |
71 |
73 |
72 |
50 |
8 |
5 |
80W |
||||||
EI96 |
ei 8642 |
86 |
77 |
73 |
72 |
56 |
8 |
5 |
100W |
||||||
ei 8645 |
86 |
80 |
73 |
72 |
59 |
8 |
5 |
125W |
|||||||
ei 8650 |
86 |
85 |
73 |
72 |
64 |
8 |
5 |
150W |




