3M 3749 User Manual
3M Round Conductor Flat Cable
.025″ 30 AWG Solid, TPE 3749 Series
S Close spacing permits higher signal density
S TPE insulation provides excellent
transmission properties
S 30 AWG solid conductors on .025 inch spacing
allows for mass termination
S Zippable for branching or discrete termination
S Meets SCSI-3 Fast-20 characteristic impedance
requirements
TS-0068-15
Date Modified: May 30, 2003
Sheet 1of 2
Physical
Insulation
Material: Thermoplastic Elastomer (TPE)
Color: Gray
Marking
Standard: None
Canadian Option:
Conductors: 30 AWG [ 0.254 ] Tinned Solid Copper
AWM 20297 105C 150V VW1 3M NU
EU <50V
Electrical
Voltage Rating: USA: 150 V Canada: 150V EU: <50V
Insulation Resistance: >1× 10
Characteristic Impedance: Unbalanced: 90 Ω
Capacitance: Unbalanced: 16.5 pF/ft. [ 54.1 pF/m ]
Inductance: Unbalanced: .13 µH/ft. [ 0.43 µH/m ]
Propagation Delay: Unbalanced: 1.48 ns/ft.[ 4.86 ns/m ]
Velocity of Propagation: Unbalanced: 69%
Note: Unbalanced is measured between ground-signal-ground conductors.
10
Ω/10 ft. [ 3m ]
C
AWM IA 105C 150V FT1
Environmental
Temperature Rating: -- 4 0 °Cto+105°C
Flammability Rating: USA: VW-1 Canada: FT1
UL File No.: E42769, Style No.: 20297
3
Interconnect Solutions
http://www.3M.com/interconnects/
3M is a trademark of 3M Company.
For technical, sales or ordering information call
800-225-5373
3M Round Conductor Flat Cable
.025″ 30 AWG Solid, TPE 3749 Series
Number of
Conductors
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 ]
(OPTIONAL)
100 3749/100 2.500 ± .015 [63.50 ] 2.475± .012 [ 62.87 ]
3M Part
Number
A
B
Dimension A Dimension B
.013 ¦ .005
[0.33]
.025 ¦ .003
[0.64]
Note:
1. Blue marking on one edge of cable designates wire #1.
Ordering Information
30 AWG [0.254]Tinned
Solid Copper Conductors
3749/XX
Blank = Standard
C = Canadian Certified
Version
.025 ¦ .002 Typ
[0.64]
TPE Insulation
Number of Conductors
(See Table)
Inch
[mm]
Tolerance Unless Noted
.0 .00 .000
Inch
[ ] Dimensions for
Reference only
±.005±.1 ±.01
Note:
2. Available in standard lengths of 100 feet or 300 feet per roll, please specify when ordering.
3
Interconnect Solutions
http://www.3M.com/interconnects/
TS-0068-15
Sheet 2 of 2
3M is a trademark of 3M Company.
For technical, sales or ordering information call
800-225-5373
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