Product Category

EI Transformer for Amplifier

POWER: 300VA
Insulation systems: 105/130/155/180 degree are available.
Primary is specified, 100/110/115/120/220/230/240/380/415V.
Secondary is specified by customer.
Design to meet UL/CSA/TUV/VDE/CE and other safety requirements.
ROHS 2.0 Directive and (SVHC/REACH) are conformity.
Application field: Amplifier

Key Specifications

The transformer is widely use in the Stage amplifier, KTV, PA and other home theater amplifier. Amplifier requests the transformer is with high efficiency, small loss, Low interference resistance, small magnetic leakage, No static current sound, sufficient power for subwoofer, low temperature rise and other requirements.

Power Range: 10VA to 450VA (EI41 ~ EI133.2)

Phase: Single

Input/Output: Customized

Insulation: up to 4kV (Hi-pot)

Sample Lead Time： 3~5 days
Production Lead Time：3 Weeks (Urgent order can be negotiated)
Quantity：No MOQ Require

Specification Table

Power	Regulation	Temperature Rise	Size(mm)				Power	Regulation	Temperature Rise	Size(mm)
(VA)	(%)	℃	L	W	H	F/A×B	(VA)	(%)	℃	L	W	H	F/A×B
10VA	18.0%	60℃	50	34	44	61	120VA	7.5%	60℃	86.2	72	72	71×63
15VA	18.0%	60℃	50	40	44	61	140VA	6.8%	60℃	86.2	79	72	71×70
25VA	16.0%	60℃	59.5	44	50.5	70.5	160VA	6.5%	60℃	96	75	80.5	76×61
30VA	15.0%	60℃	59.5	48.5	50.5	70.5	190VA	6.4%	60℃	96	82	80.5	76×68
35VA	13.0%	60℃	59.5	54	50.5	70.5	220VA	5.0%	65℃	105	79	91	76×58
40VA	12.0%	60℃	68.5	52	58.5	81.5	260VA	4.8%	65℃	105	89	91	76×68
50VA	11.0%	60℃	68.5	58	58.5	81.5	290VA	4.8%	65℃	105	94	91	76×73
60VA	9.0%	60℃	68.5	68	58.5	81.5	350VA	4.6%	65℃	114	94	97.5	95×80
70VA	8.0%	60℃	78.5	62	68.5	90	420VA	4.5%	65℃	114	104	97.5	95×90
90VA	8.0%	60℃	78.5	68	68.5	90	450VA	4.5%	65℃	114	109	97.5	95×95

Process

EI Transformer Main Materials (IQC process)

All the material is inspected strictly with ISO9001:2015 quality program.

Core: appearance inspection and core loss test.

Copper wire: pinhole test and coat of adhesion test

EI Transformer Process

EI lamination has 0.35mm and 0.5mm thickness, material has Z11/H12/H14/H18/H50 of option.
The insulation for coil has 0.075/0.125mm thickness polyster film. 0.18/0.25mm DMD insulation paper and T410 Nomex paper. The brand of polyster film is DUPONT. The layers of overlap is deponds on the safety agent requirements.
Primary and Secondary winding wire is polyesterimid enameled, have 130/155/180/200degree for option.
Primary lead wire from type UL1617 double insulation for 600V voltage and 105 degree or UL3321 XLPE for 600V and 150degree.
Secondary lead wire from type UL1015 for 600V voltage and 105 degree.
Outer insulation is overlap 1 layer 0.075/0.125mm thickness polyester film or 0.18/0.25mm DMD insulation paper or T410 Nomex paper.

EI Transformer Testing Items

Exciting current & core loss: 100% test
DC Resistance: 100% test
Layer insulation: 100% test
Loading test: 100% test
Hi-pot test: 100% test, but the time is only approx 10seconds for the production-run.
Aging test: Spot check, 10% of product quantity

Product Category

EI Transformer for Amplifier

Key Specifications

Process

FAQ

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