P O W E R T R A N S F O R M E R
P C M O U N T : SPLIT PACK
Web: www.TriadMagnetics.com
Phone 951-277-0757
Fax 951-277-2757
22520B Temescal Canyon Road
Corona, California
92883 Publish Date: April 11, 2008
FS28-040
Description:
The FS28-040 is a dual primary and d ual secondary, split bobbin design which
operates with either a pa rallel input of 115V or a series input of 230V. The output
voltage will be either 28.0 V with a center-tap under a 0.04A load with the
secondaries wired in series, or 14.0V under a 0.08A load with the se condaries
wired in parallel. The split bobbin design eliminate s the nee d for costly
electrostatic shielding.
Electrical Specifications (@25C)
1. Maximum Power: 1.1VA
2. Primary: Series: 230V; Parallel: 115V
3. Secondary: Series: 28.0V CT@ 0.04A; Parallel: 14.0V @ 0.08A
4. Voltage Re gulation: 25% TYP @ full load to no load
5. Temperature Rise: 25C TYP
6. Hipot tested 100% at 2500 VRMS
Construction:
Three flange bobbin construction with primaries and secondaries wound side by
side for low capacitive coupling.
Agency File:
UL: File E53148, UL 5085-2 (506), Class B General Purpose Transformer,
cUL: File E53148, UL 5085-2 (506), Class B General Purpose Transformer,
Canadian Use (CSA 22.2, No.66.2-06)
This model is also available in Class 2, UL 5085-3 (1 585) version as FS28-040-C2
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:
1
2
3
48
7
6
5
115/230V
50/60Hz
1
2
3
4
115/230V
50/60Hz
PARALLEL 1
2
3
4
115/230V
50/60Hz
SERIES
RoHS Compliance: As of manufacturing date February 2005, all standard
product s meet the requirements of 2002/95/EC, known as the RoHS initiative.
As of April 7, 2008, UL standards 506 a nd 1585 will be migrated to UL 5085-2 and
5085-3, respectably.
* Upon printing, this document is considered “uncontro lled”. 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
