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3M 025″ Round Conductor Flat Cable 30 AWG Solid TPE 3749 Series
The 3749 Series round conductor flat cable from 3M provides a .025‑inch spacing with 30 AWG solid tinned copper conductors and thermoplastic elastomer (TPE) insulation. The design supports mass termination and can be zippable for branching or discrete termination, meeting SCSI‑3 Fast‑20 characteristic impedance requirements.
Technical specifications include a 150 V rating (USA/Canada), <50 V EU rating, temperature range from –40 °C to +105 °C, and a 90 Ω unbalanced characteristic impedance. The cable is available in standard lengths of 100 ft or 300 ft per roll, with various conductor counts and dimensions listed in the data tables.
3M 3749 Series specifications
| Conductor size | 30 AWG (0.254 mm) solid tinned copper |
|---|---|
| Insulation material | Thermoplastic Elastomer (TPE) |
| Voltage rating | USA/Canada 150 V, EU <50 V |
| Temperature rating | –40 °C to +105 °C |
| Flammability rating | USA VW‑1, Canada FT1 |
| Characteristic impedance (unbalanced) | 90 Ω |
| Capacitance (unbalanced) | 16.5 pF/ft |
| Inductance (unbalanced) | 0.13 µH/ft |
| Propagation delay (unbalanced) | 1.48 ns/ft |
| Velocity of propagation (unbalanced) | 69 % |
| Insulation resistance | > 1 × 10¹⁹ Ω·10 ft |
| Color | Gray |
Source: 3M 025″ Round Conductor Flat Cable 30 AWG Solid TPE 3749 Series
All 3M 3749 Series documents by type
Questions answered in these manuals
What is the voltage rating of the 3M 3749 Series flat cable?
It is rated for 150 V in the USA and Canada and less than 50 V in the EU.
From: 3M 025″ Round Conductor Flat Cable 30 AWG Solid TPE 3749 Series
What temperature range can the cable operate in?
The cable can be used from –40 °C up to +105 °C.
From: 3M 025″ Round Conductor Flat Cable 30 AWG Solid TPE 3749 Series
What is the voltage rating of the 3749 Series cable?
The cable is rated for 150 V in the USA and Canada, and less than 50 V in the EU.
From: 3M 3749 Series Round Conductor Flat Cable Product Data Sheet
What is the characteristic impedance of the cable?
It has an unbalanced characteristic impedance of 90 Ω.
From: 3M 3749 Series Round Conductor Flat Cable Product Data Sheet