It’s a T3 ([http://aemcomponents.com/applications/faq/|''slow blow]'') 15A 250V fuse.
Here’s a link to a [https://www.ebay.co.uk/itm/2X-10-Pcs-Radial-Cables-Slow-Blowing-Micro-Fuse-T3-15A-250V-T5J4-Y5I5/282959785185?hash=item41e1b7ace1:g:UU0AAOSwqHBa8-4F|supplier]
Here’s a link to a [https://www.ebay.co.uk/itm/2X-10-Pcs-Radial-Cables-Slow-Blowing-Micro-Fuse-T3-15A-250V-T5J4-Y5I5/282959785185?hash=item41e1b7ace1:g:UU0AAOSwqHBa8-4F|supplier]
Hi @ ceeskoedijk,
It’s a T3 (slow blow) 15A 250V fuse.
Here’s a link to a [https://www.ebay.co.uk/itm/2X-10-Pcs-Radial-Cables-Slow-Blowing-Micro-Fuse-T3-15A-250V-T5J4-Y5I5/282959785185?hash=item41e1b7ace1:g:UU0AAOSwqHBa8-4F|supplier]