Alvin's Cables OCB-DWS5521 D-Tap to Locking DC Coiled Cable

Alvin's Cables OCB-DWS5521 is a coiled power cable with a D-Tap male plug and locking DC connector, listed for selected monitors and video devices. Its stated 21cm length stretches to 100cm, but connector fit and power requirements should be checked against your equipment.

At a glance

Coiled lead with a stated 21cm resting length and 100cm stretch length.
D-Tap male plug at one end and a locking DC connector at the other, as described in the cable details.
Listing identifies compatibility with selected Atomos, Video Devices, Hollyland and SmallHD equipment.

Price

£16.99Save 15%

Reference price: ~~£19.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Coiled construction can keep a short lead compact and extend when the connected equipment is positioned farther away.
The product details name two locking DC plug sizes, 5.5 *2.1mm and 5.5*2.5mm, which may suit different compatible sockets.

Technical specifications

13 specifications

Identity
Brand	Alvin's Cables
Model	OCB-DWS5521

Connections and use
Plug type	4-pin XLR (D-Tap)
Connector gender	Male-to-Female
DC connector compatibility	5.5 2.1mm and 5.52.5mm
Listed compatible devices	Atomos Ninja V, Atomos Shogun, Video Devices PIX-E7 7 Touchscreen Display, Hollyland Mars 400s, SmallHD 702 touch monitor.

Dimensions and installation
Cable length	21cm/Stretch 100cm
Weight listed	0.02 Kilograms
Colour	Straight DC Coiled Cable

Other listed details
Wattage	90 watts
Special features	Short Circuit Protection, Tangle Free
Indoor/outdoor usage	Outdoor
UL listed	No

What to know before buying

Listing details to confirm

Listing details are inconsistent: its title and feature text describe a D-Tap-to-locking-DC cable, while connector gender and plug type fields say Male-to-Female and 4-pin XLR (D-Tap). The colour field says "Straight DC Coiled Cable" despite the coiled-cable description. Confirm the cable ends, DC size, and fit for your device before purchase. The listed wattage and protection claims are not independently verified.

Who is it for?

A good fit for

Camera crews powering a listed monitor or video device from a D-Tap source, after confirming the DC plug size and equipment requirements.
Buyers who want a short coiled lead that can extend to the stated 100cm.

Less suited to

Devices that do not use the stated D-Tap source and compatible locking DC connection.
Buyers needing a confirmed voltage, current rating or exact connector configuration, as these are not clearly established in the listing.

Alvin's Cables OCB-DWS5521 D-Tap to Locking DC Coiled Cable · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 79 ratings

5 stars77%77%
4 stars12%12%
3 stars3%3%
2 stars5%5%
1 star3%3%

Only aggregate rating data is supplied, with a largely positive distribution alongside some lower-star ratings. That gives a generally favourable but limited indication of customer sentiment, not evidence about connector fit or performance. For this cable, confirming the correct D-Tap and locking DC connections matters more than the aggregate score.

Frequently asked questions

How long is this cable?

The listing states a length of 21cm, stretching to 100cm.

Which devices is it listed for?

The listing names Atomos Ninja V and Shogun, Video Devices PIX-E7, Hollyland Mars 400s and SmallHD 702. Check the connector and power requirements of your exact device.

Which locking DC sizes are stated?

The feature text says the locking DC plug is compatible with 5.5 *2.1mm and 5.5*2.5mm. Other connector details on the page are inconsistent, so verify the plug configuration before ordering.