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01.40W R-Core Transformers
02.100W R-Core Transformers
03.200W R-Core Transformers
04.50W R-Core Transformers
40W R-Core Transformers US$21

40W R-Core Transformers


R-core is unique type of core designed and developed by Japanese engineers. These cores are manufactured in the conventional rectangular shape but the slitting is done by a special process, ensuring high stacking factor. The special heat treatment, continuous strip and no gap ensure higher efficiency to the transformers.


Further the LEAKAGE FLUX of the transformer IS VERY LOW (about 1/10th of conventional transformers), which permits the equipment manufacturer to place the transformer close to critical electronic components. The balanced winding & low leakage flux ensures LOW NOISE of the transformers. This gives a cutting edge to the transformer for use in Medical Equipment, Audio & Video amplifiers & other noise sensitive equipment.

The other unique feature is the use of Bobbins in two parts. The primary winding and secondary winding are done on separate bobbins thus ensuring complete isolation between the two windings. This allows meeting of any safety standards requirement.

1. The special characteristic of the R-core transformer is the ability of the two coils to mutually cancel each other's magnetic flux by means of balanced, symmetrical winding of the coils. With this winding method the leakage flux can be kept to a minimum amount. The key point is the exact balance of the two coils.

2. The R-core transformer has absolutely no gap in its magnetic paths. On the other hand, the EI-type has a magnetic gap in 6 locations, and the CI or the cut core type has 2 to 4 magnetic gaps. A great deal of leakage flux escapes from these magnetic gaps.

3. The R-core transformer makes a maximum use of the superior material properties of the Z-H grain-oriented silicon steel. As a result, the core's magnetic resistance is very low, and the cross section of the magnetic path is uniform. The exciting current of the R-core transformer is lower than the EI-type ensuring that the leakage flux is minimal and a higher percentage of the entire magnetic flux of the R-core transformer is being put to much more effective use.


R26-08  primary 115 X 2 : 0-32(0.5A) X 2; 0-9-12(0.5A)
R26-09  primary 115 X 2 : 0-220(50mA) X 2; 0-6.3(0.8A) X 2
R26-10  primary 115 X 2 : 0-18(0.65A) X 2; 0-9(0.65A) X 2
R26-11  primary 115 X 2 : 0-12(0.64A) X 2; 0-15(0.64A) X 2
R26-14  primary 115 X 2 : 0-18(0.48A) X 4
R26-16  primary 115 X 2 : 0-28(0.45A) X 2;0-35(60mA) X 2; 12-0-12(60m
A) x 2
R26-22  primary 115 X 2 : 0-18(0.97A) X 2
R26-24  primary 115 X 2 : 18-0-18(0.65A); 9-0-9(0.65A)
R26-27  primary 115 X 2 : 0-35(0.25A) X 2 0-42(0.25A) X 1;12-0-12(0.25A)
R26-28  primary 115 X 2 : 0-12(0.85A) X 2; 0-9(0.85A) X 2
R26-29  primary 115 X 2 : 0-9 X 3(0.7A); 9-0-9(0.7A)
R26-34  primary 115 X 2 : 0-9(0.7A) X 2; 0-15(0.7A) X 2
R26-42  primary 115 X 2 : 0-50-55(0.32A) X 2
R26-51  primary 115 X 2 : 0-24(0.5A) X 2; 0-9(0.5A) X 2
R26-75  primary 115 X 2 : 0-20(0.5A); 0-4(0.5A).0-11(1.2A).0-9(1.5A)
R26-79  primary 115 X 2 : (3.15-2.5-0-2.5-3.15) X 2(2A); 0-12.6(0.5A); 0-5(1A)
R26-90  primary 115 X 2 : 0-165V(0.1A); 0-9V (1A) X 2
R26-93  primary 115 X 2 : 0-9 (1A) X 2; 0-9 (2A)
R26-99  primary 115 X 2 : 18-0-18(0.2A); 0-9.5(0.7A); 0-10.5(2.5A)

Size: L90mm*W80mm*H50mm

mounting screw hole?L70mm*W55mm

This product was added to our catalog on Friday 11 July, 2003.
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