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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 |
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
my Holy Grail Brow product thank you Katie Jane Hughes
Color: Medium Brown
This is my 3rd or 4th? re-order. I don't know what I will do if it gets discontinued for any reason:( I have very sparse , light brows. This is the only thing in the world that has ever let me make realistic brow hairs, with a small learning curve that don't look drawn on, or fade during the day. The pen will dry out if not left stored upside down. It lasts me at least a few months. I'm always ordering another one before it runs out just so that I'll have a back up. Thank you allure! Glossier has a version of this, but it's less product for more money and the tip isn't a thin as this one. I have even ordered this for friends, it's that good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 6, 2020
★★★★★ 1
Too bad product totally dried up within a few days
Color: Taupe
I really wished this had worked: the color was perfect. At first use the ink was dry but noticeable. Second use, totally dried up. I wanted to return it and try again, but Amazon required the original packaging. Who keeps the original packaging on a $6 item?
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
★★★★★ 5
Love these!
Color: Dark Brown
I use these everyday. They're the best pen I have found for brows. They have a thin tip perfect for hair like strokes. Hate the Ulta stopped carrying them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
★★★★★ 3
Maybe a fluke?
Color: Medium Brown
I'm truly bummed because I loved this product and was so excited to find such an accurate brow pen that was a good price. I thought the search was over.. I literally got two good applications from it which were to test it out and get the feel of this pen. I did not leave the cap open and when not in use, stored vertically so the tip is pointing down (good habits for such products). Two uses and it was like it was empty. I could get a stroke here and there, but it just kept giving less and less.
Maybe I did something wrong, but I've been on the hunt for a good brow pen and have tried many - I know the do's and dont's. I'm so so soo bummed because it was amazing and so relieving for the brief moment I was able to use it. I thought my search was over.
I may try it again - maybe it was a fluke.. but this is a great pen if it can actually provide more than a couple uses.
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Reviewed in the United States on October 3, 2020
★★★★★ 4
The product and colors are absolutely fabulous!
Color: Medium Brown
The only disappointment I have is that the product runs out quickly. The product design, color, and mechanism is first class. Perhaps the 3 times that I’ve purchased had been sitting on the shelf for a while. Since this is similar to a paint brush, I wish the package would include a date of manufacturing so that the consumer knows what they are buying.
I love the application tip. It lays down a moderate, hair-like stroke of realistic color. The time it takes to dry allows you to finish application of one whole brown, and time to blur it for a more natural look.
Fantastic product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 22, 2023
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