I want to use this to power an led strip which has a 3pin connector. will it be ok? could i put a splitter on and power some fans too? thanks

There is no reason you cannot use this cable for extending an LED strip with a 3 pin connector. You won't be able to use a splitter to power a fan and LED though.

Including the connector on each end, they are 33 cm in length (+/- a few mm variation in each cable)

Can they be used to convert a 4 pin fan to a 3 pin fan header?

If the connector on the fan allows a 3pin connector to be attached, which is usually the case, yes, it can be done.

Can i use this with the fan: nf-a4x10 5v?

no, please choose NF-A4x10 FLX 12V https://www.amazon.co.uk/40x10mm-Bearing-Premium-Cooling-NF-A4x10/dp/B009NQLT0M/ref=sr_1_2?ie=UTF8&qid=1548171233&sr=8-2&keywords=a4x10+flx

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Noctua NA-SEC1 chromax.black, 30cm Fan Extension Cable Set 4-pack

Product ID: 59906263

Details

Brand
Noctua
Cable type
Extension
Compatible devices
Noctua Fans
Connector type
3-Pin/4-Pin
Special feature
High Speed

⚡Supports 3-pin & 4-pin fans

📏4x 30cm extension cables

🖤Sleek chromax.black sleeving

€ 25.50

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In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖤 Elevate your PC build with sleek, flexible fan extensions — because your rig deserves the best.

BUILT TO LAST - Industry-leading 6-year manufacturer’s warranty for peace of mind
SLEEK DISCREET DESIGN - Chromax.black sleeving for a clean, professional PC build aesthetic
PLUG PLAY CONVENIENCE - 4-pin connectors support both 3-pin and 4-pin fans for easy setup
UNIVERSAL COMPATIBILITY - Works seamlessly with all Noctua 12V and many third-party fans
EXTEND YOUR COOLING REACH - Four 30cm cables for ultimate fan placement freedom

The Noctua NA-SEC1 chromax.black is a premium 4-pack of 30cm fan extension cables featuring universal 3-pin/4-pin compatibility, durable black sleeving for a clean look, and backed by a 6-year warranty, designed to enhance airflow customization and aesthetics in professional PC builds.

Specifications

ASIN	B07654W3F2
Best Sellers Rank	7,217 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 65 in Computer Cases
Brand	Noctua
Cable Type	Extension
Colour	chromax.black
Compatible Amazon Tablet Models	Amazon Fire 5th Generation
Compatible Devices	Noctua Fans, Devices with 3-pin fan connectors
Compatible Phone Models	No Compatible Phone Models
Connectivity Technology	4pin fan connector
Connector Gender	Male-to-Female
Connector Type	3-Pin/4-Pin
Country Of Origin	Taiwan
Customer Package Type	Standard packaging
Customer Reviews	4.6 4.6 out of 5 stars (1,792)
EU Spare Part Availability Duration	6 Years
External Testing Certification	Não aplicável
Global Trade Identification Number	09010018200492
Included Components	Camera body, battery pack
Indoor Outdoor Usage	Indoor
Item Length	30 Centimetres
Item Shape	Round
Item Weight	59 Grams
Manufacturer	Noctua
Manufacturer Part Number	NA-SEC1 chromax.black
Maximum Voltage	12 Volts (DC)
Model Name	NA-SEC1 chromax.black
Model Number	NA-SEC1 chromax.black
Number of Items	1
Number of Pins	4
Other Special Features of the Product	High Speed
Outer Material	Sleeving
Product Warranty	6 year manufacturer’s warranty
Recommended Uses For Product	PC fan extension and customization
Specification Met	Unspecified Industry Standards
UPC	841501120497
Unit Count	4.0 count

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