SKU: 46479081204

3M 3749-40 Ribbon Cable, Round Conductor Flat, Grey, 40 Core, 30 AWG, 0.051 mm�

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Description

3M 3749-40 Ribbon Cable, Round Conductor Flat, Grey, 40 Core, 30 AWG, 0.051 mm�The 3749 series from 3M are round conductor flat cable. The ribbon cable has 30AWG solid conductors on 0. 025inch spacing that allows for mass termination. The Thermoplastic elastomer (TPE) insulation provides excellent transmission properties. Zippable for branching or discrete termination Meets SCSI 3 Fast 20 characteristic impedance requirements Gray colour insulation Tinned solid copper conductor Voltage rating of 150V Operating temperature range

The 3749 series from 3M are round conductor flat cable. The ribbon cable has 30AWG solid conductors on 0.025inch spacing that allows for mass termination. The Thermoplastic elastomer (TPE) insulation provides excellent transmission properties.
  • Zippable for branching or discrete termination
  • Meets SCSI-3 Fast-20 characteristic impedance requirements
  • Gray colour insulation
  • Tinned solid copper conductor
  • Voltage rating of 150V
  • Operating temperature range -40�C to +105�C
  • 10 to 100 conductors based on ordering
  • First conductor is identified by a blue marking on one edge of cable
  • UL recognised (Style 20297) in FT2 flame retardant
  • Close spacing permits higher signal density

Applications

Industrial, Power Management

Product details

No. of Cores 40Core
Reel Length (Metric) -
Conductor Material Tinned Copper
Pitch Spacing 0.635mm
Jacket Material TPE
Voltage Rating 50V
Cable Width 25.4mm
Reel Length (Imperial) -
Product Range 3749 Series
Wire Gauge 30AWG
Jacket Colour Grey
No. of Max Strands x Strand Size Solid
Conductor Area CSA 0.051mm�
Ribbon Cable Type Flat Ribbon Cable

Other details

Brand 3M
Part Number 3749-40
Quantity 1 Metre
Technical Data Sheet EN

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Exchange/Return Notes
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SKU: 46479081204

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4.5 ★★★★★
Based on 13 reviews
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Product Reviews
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Verified Purchase
Mark B.
Louisville, US
★★★★★ 4
Got what I paid for.
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
I dropped my drill with the bit installed. It broke quite easily. It was a relatively inexpensive so I can't complain. A higher quality harder metal would have earned 5 stars.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2025
A
Verified Purchase
Amazon Customer
Lexington, US
★★★★★ 5
Great product
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
These bits are great. We use them every day e when patching or plugging tires. Having multiple sizes helps us match the bit to the patch we use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
M
Verified Purchase
Monty W. Parks
Belleville, US
★★★★★ 5
Easy on the hands
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
These make it much easier to ream tires that have been punctured. It takes the stress off of your hands, forearms and elbows especially when you’re plugging higher ply tires.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025
M
Verified Purchase
Manny
Lake Worth, US
★★★★★ 5
Handy Tool for Frequent Flat Tire Repairs
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
Good quality and easy to use. As someone involved in emergency services, we deal with flat tires often, and this tool has been really helpful. The bits are sharp, durable, and make the repair process quicker and cleaner. Great to keep on hand for regular use or in a roadside kit.
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Reviewed in the United States on August 14, 2025
J
Verified Purchase
Jeremiah
Draper, US
★★★★★ 5
Tire repair done right
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
Works well, for my high volume automotive repair store.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 28, 2025

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