SL X15p

{{Short description|Swedish narrow gauge electric-multiple-unit local train made by Stadler}}

{{Expand Swedish|topic=transp|date=March 2022}}

{{More citations needed|date=March 2022}}

{{Infobox train

| name = X15p

| image = Stockholms östra SL X15p - 20240420 - 01.jpg

| caption = SL X15p at Stockholm Östra station in 2024

| interiorimage =

| interiorcaption =

| service =

| manufacturer = Stadler Rail

| factory =

| family =

| replaced = X10p/UBxp/UBp

| yearconstruction = 2017–

| yearservice =

| refurbishment =

| numberconstruction = 66 carriages (22 sets)

| numberbuilt =

| numberservice =

| formation = 3-car sets (A-C-B)

| fleetnumbers = 701–722

| capacity = 162 seats

| operator = Transdev (under contract from Storstockholms Lokaltrafik)

| depots = Vallentuna

| lines = Roslagsbanan

| carbody =

| trainlength = {{convert|59.7|m|ftin|abbr=on}}

| carlength =

| width = {{convert|2.75|m|ftin|abbr=on}}

| height = {{convert|3.9|m|ftin|abbr=on}}

| floorheight = {{convert|665|mm|in|abbr=on}}

| platformheight =

| entrylevelorstep =

| doors = 2 / side / car

| wheeldiameter = {{convert|760|mm|in|abbr=on}}

| wheelbase = {{convert|2|m|ftin|abbr=on}}

| maxspeed = {{convert|120|km/h|abbr=on}}

| weight =

| axleload =

| steep gradient =

| traction =

| traction motors = 8 × TSA TMF 42-24-4 {{convert|180|kW|abbr=on}}{{cite web |title=Stadler Rail X15p narrow gauge EMUs for SL Roslagsbanan Stockholm |url=https://www.tsa.at/tsa_referenzen/stadler-rail-x15p-narrow-gauge-emus-for-sl-roslagsbanan-stockholm/ |publisher=Traktionssysteme Austria |access-date=31 January 2023}}

| poweroutput = {{convert|1440|kW|abbr=on}}

| tractiveeffort =

| transmission =

| acceleration = {{convert|0.95|m/s2|abbr=on}}

| deceleration =

| aux =

| powersupply =

| electricsystem = {{1,500 V DC}} (nominal) from overhead catenary

| collectionmethod = Pantograph

| uicclass = Bo′Bo′+2′2′+Bo′Bo′

| bogies =

| minimum curve =

| brakes =

| safety =

| coupling = Dellner

| multipleworking =

| gauge = {{track gauge|891mm|allk=on}}

| notes = {{cite web|url=https://www.stadlerrail.com/media/pdf/tmrlb0919e.pdf|title=X15p EMU SL Roslagsbanan|website=Stadler Rail}}

| seating =

}}

X15p is a class of narrow gauge electric multiple units to be operated by SL on the Roslag Railway.{{Cite press release|url=http://www.mynewsdesk.com/se/sl/pressreleases/sl-koeper-in-nya-taag-till-roslagsbanan-1530272|title=SL buys new trains for Roslagsbanan|lang=sv|publisher=SL|date=2016-08-23}} 22 3-car sets will be delivered from 2020 to increase capacity on the network; the first of which were delivered in autumn 2020. Testing of the trains has been going on since then and the first train entered service on 31 October 2023.{{cite web |url=https://www.railwaygazette.com/traction-and-rolling-stock/narrow-gauge-commuter-trains-enter-service-in-stockholm/65274.article |title=Narrow gauge commuter trains enter service in Stockholm |publisher=Railway Gazette International |date=6 November 2023}} The name follows Swedish tradition for rail vehicle names, in which X means electric multiple unit, and the last p means 891 mm gauge.

A new depot, Vallentunadepån, has been constructed near Molnby, about 3,5 kilometers north of Vallentuna, in order to house the new trains. The depot contains space for all of the 22 new trains, with the ability to conduct maintenance on them as well. The older X10p rolling stock will still be housed at the depot in Mörby. {{cite web |url=https://www.regionstockholm.se/verksamhet/kollektivtrafik/aktuella-projekt/Roslagsbanan/Informationsmaterial/Tagdepa-i-Molnby/ |title=Roslagsbanans depå i Vallentuna |website=regionstockholm.se|access-date=14 June 2023}}