F28-700 TRIAD | Alldatasheet
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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 460 Harley Knox Blvd. Perris, California 92571 Publish Date: December 4, 2013 F28-700 Description: The F28-700 is a single primary and dual secondary, split bobbin design which operates with an input of 115V. The output voltage will be either 28.0V with a center-tap under a 0.7A load with the secondaries wired in series, or 14.0V under a 1.4A load with the secondaries wired in parallel. The split bobbin design eliminates the need for costly electrostatic shielding. Electrical Specifications (@25C) 1. Maximum Power: 20.0VA 2. Primary: 115V 3. Secondary: Series: 28.0V CT@ 0.7A Parallel: 14.0V @ 1.4A 4. Voltage Regulation: 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 (1585) version as F28-700-C2 Dimensions: Units in inches. H W L A B C D E F Weight: 0.80 lbs Schematic: 115V 50/60Hz RoHS Compliance: As of manufacturing date February 2005, all standard products meet the requirements of 2011/65/EU, known as the RoHS initiative. As of April 7, 2008, UL standards 506 and 1585 will be migrated to UL 5085-2 and 5085-3, respectively. * Upon printing, this document is considered ”uncontrolled”. Please contact Triad Magnetics’ website for the most current version. 1 4 L H W E A B A C 0.06" DIAMETER HOLE D F 5 8 Board Layout