.025″ Round Conductor Flat Cable 30 AWG Solid, TPE 3749 Series Close spacing permits higher signal density TPE insulation provides excellent transmission properties 30 AWG solid conductors on .025 inch spacing allows for mass termination Zippable for branching or discrete termination Meets SCSI-3 Fast-20 characteristic impedance requirements Date Modified: February 19, 1999 TS-0068-14 Sheet 1 of 2 25 Physical Insulation Material: Thermoplastic Elastomer (TPE) Color: Gray Marking Standard: None Canadian Option: AWM 20297 105C 150V VW1 3M NU C EU <50V Conductors: 30 AWG [ 0.254 ] Tinned Solid Copper AWM IA 105C 150V FT1 Electrical Voltage Rating: Insulation Resistance: Characteristic Impedance Capacitance Inductance Propagation Delay Velocity of Propagation USA: 150 V Canada: 150V > 1 × 1010 Ω/10 ft. [ 3m ] Unbalanced: 90 Ω Unbalanced: 16.5 pF/ft. [ 54.1 pF/m ] Unbalanced: .13 µH/ft. [ 0.43 µH/m ] Unbalanced: 1.48 ns/ft. [ 4.86 ns/m ] Unbalanced: 69% EU: <50V Note: Unbalanced is measured between ground-signal-ground conductors. Environmental Temperature Rating: –40°C to +105°C Flammability Rating: USA: VW-1 Canada: FT1 UL File No.: E42769, Style No.: 20297 3M Interconnect Solutions Division 6801 River Place Blvd. Austin, TX 78726-9000 For technical, sales or ordering information call 800-225-5373 .025″ Round Conductor Flat Cable 30 AWG Solid, TPE 3749 Series (OPTIONAL) Number of Conductors 3M Part Number Dimension A Dimension B 20 3749/20 0.500 ± .006 [ 12.70 ] 0.475 ± .004 [ 12.07 ] 26 3749/26 0.650 ± .006 [ 16.51 ] 0.625 ± .004 [ 15.88 ] 34 3749/34 0.850 ± .009 [ 21.59 ] 0.825 ± .006 [ 20.96 ] 36 3749/36 0.900 ± .009 [ 22.86 ] 0.875 ± .006 [ 22.23 ] 40 3749/40 1.000 ± .009 [ 25.40 ] 0.975 ± .006 [ 24.77 ] 50 3749/50 1.250 ± .009 [ 31.75 ] 1.225 ± .006 [ 31.12 ] 60 3749/60 1.500 ± .012 [ 38.10 ] 1.475 ± .009 [ 37.47 ] 68 3749/68 1.700 ± .012 [ 43.18 ] 1.675 ± .009 [ 42.55 ] 80 3749/80 2.000 ± .015 [ 50.80 ] 1.975 ± .011 [ 50.17 ] 100 3749/100 2.500 ± .015 [63.50 ] 2.475 ± .012 [ 62.87 ] A B .013 .005 [ 0.33 ] .025 .002 Typ [ 0.64 ] .025 .003 [ 0.64 ] 30 AWG [0.254] Tinned Solid Copper Conductors TPE Insulation Inch [mm] Tolerance Unless Noted .0 Inch Note: 1. Blue marking on one edge of cable designates wire #1. ± .1 .00 .000 ± .01 ± .005 [ ] Dimensions for Reference only Ordering Information 3749/XX Blank = Standard C = Canadian Certified Version Number of Conductors (See Table) Note: 2. Available in standard lengths of 100 feet or 300 feet per roll, please specify when ordering. TS-0068-14 Sheet 2 of 2 3M Interconnect Solutions Division 6801 River Place Blvd. Austin, TX 78726-9000 For technical, sales or ordering information call 800-225-5373