CLASS 2/3 TRANSFORMER

www.TriadMagnetics.com

Phone: (951) 277-0757

Fax: (951) 277-2757

460 Harley Knox Blvd.

Perris, CA

92571

Publish Date: December 4, 2013

FS28-040-C2

Description:

The FS28-040-C2 is a series/parallel primary and dual secondary, split bobbin

design which operates with either a parallel input of 115V or a series input of 230V.

The secondaries are 14V @ 0.04A each. They can be used independently (up to

300V difference between them) or in series for double the voltage or in parallel for

double the current. The split bobbin design eliminates the need for costly

electrostatic shielding.

Electrical Specifications (@25C)

1. Maximum Power: 1.1VA

2. Primary: Series: 230V; Parallel: 115V

3. Secondaries: 14.0V @ 0.04A each

4. Voltage Regulation: 25% TYP @ full load to no load

5. Temperature Rise: 25C TYP

6. Hipot tested 100% at 4200 VRMS pri to sec

7. Hipot tested 100% at 2160 VRMS sec to sec

8. Inherently Limited. No fusing required.

Construction:

Three flange bobbin construction with primaries and secondaries wound side by

side for low capacitive coupling. UL Class F Insulation System (155°C).

Agency File:

UL: File E65390, UL 5085-1 & 3 (1585), Class 2 not wet / Class 3 wet Transformer

cUL: File E65390, UL 5085-1 & 3 (1585) For Canadian Use (CSA 22.2, No.66.3-06)

TUV Certificate No.: R72120839, EN61558, Safety Isolating xfmr, general use

Dimensions:

Units in inches.

H

W

L

A

B

C

D

E

F

0.937

1.125

1.375

0.250

0.250

1.200

0.041

0.020

0.234

Weight: 0.17 lbs

Schematic:

RoHS Compliance: As of manufacturing date February 2005, all standard products meet

the requirements of 2011/65/EU, known as the RoHS initiative.

Note: Order and shipping documentation may have a “-B” suffix; this indicates Bulk

packaging but does not show on the actual part number marked on the transformer.

* Upon printing, this document is considered “uncontrolled”. Please contact Triad Magnetics’

website for the most current version.

12

3

4

L

H

W

E

A

B

A

C

0.06" DIAMETER

HOLE

D

F

1

5

8

4

Board Layout

5

PARALLEL

4

3

2

1

14V @ 0.04A

4

3

2

1

SERIES

115V

50/60Hz

6

7

8

1

2

3

4

14V @ 0.04A

230V

50/60Hz