CLASS 2/3 TRANSFORMER
www.TriadMagnetics.com
Phone: (951) 277-0757
Fax: (951) 277-2757
Triad Magnetics
460 Harley Knox Blvd.
Perris, CA 92571 Publish Date: October 29, 2012
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; Para llel: 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 42 00 VRM S pri to se c
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 Syste m (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 2002/95/E C, 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 cons idered “uncontr olled”. Please contact
Triad Magnetics’ website for the most current version.
12 34
L
H
W
E
A
B
A
C
0.06" DIAMETER
HOLE
DF
1
58
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
