CE for Certified Single Phase Electronic EI 66 28 Power Transformer 30W Audio Output Lead Wire for Stereo Speaker Amp Output
This high-quality EI 66 28 power transformer delivers reliable 30W performance for audio applications, making it ideal for stereo speaker amplifiers and audio equipment. CE certified and meticulously engineered, this single-phase electronic transformer features durable lead wire outputs for easy installation and secure connections. The EI lamination design ensures excellent magnetic properties and minimal core losses, while providing stable voltage conversion and noise-free audio output. Perfect for DIY audio enthusiasts and professional manufacturers alike, this transformer offers consistent performance and clean power delivery to support premium sound quality. Its compact size and robust construction make it suitable for various audio devices where reliable power transformation is essential. All materials and manufacturing processes comply with international safety standards, guaranteeing peace of mind for your audio projects.
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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 |



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