UL 1950 Recognized R Turns Ratio DSL Transformer 1:1 Parameter Inductance 1 1-4 (Tie 2+3) Min. Typ. Max. Units 387.1 407.5 427.8 µH 10 µH Leakage Inductance 2 1-4(Tie 2+3, 8+9, 10+7) Schematic Diagram 3 25 pF DC Resistance 1-3 or 2-4 0.72 Ω DC Resistance 10-8 or 9-7 0.61 Ω Frequency Response 30k - 2MHz 3.0 dB Interwinding Capacitance Longitudinal Balance 20k - 1MHz 55 Hi-Pot Primary to Secondary dB 1875 1 10 3 8 2 9 4 7 VRMS Impedance 100Ω Pri. with 100Ω Sec Total Harmonic Distortion 85dB Min. 100kHz, 15Vp-p drive signal at PRI 1 10kHz and 100mV 2 100kHz and 100mV 3 10kHz and 1V Designed to meet the supplementary insulation requirements of UL1950 for a working voltage of 250V .550 (13.97) MAX. .536 (13.61) MAX. Materials used in construction of this component meet or exceed UL Class B and can be operated up to 130oC .525 (13.34) MAX. PIN POSITION GRID 0.100 (2.54) HOLES FOR BOBBIN PINS .210 (5.33) TYP. .400 (10.16) TYP. .100 (2.54) TYP. 10 9 8 7 6 Bottom View 1 2 3 4 Dimensions in Inches (mm) 5 Pin Diameter is 0.025 (0.64) RHOMBUS P/N: T-1328 CUST P/N: DATE: 09/30/00 Rhombus Industries Inc. Transformers & Magnetic Products NAME: SHEET: 15801 Chemical Lane, Huntington Beach, CA 92649 Phone: (714) 898-0960 www.rhombus-ind.com FAX: (714) 896-0971