Key takeaways
- The 715 is a diesel railcar of Slovenian Railways and so belongs in the same group as classes 711 and 713.
- Vehicle type before number: diesel or electric, railcar or loco-hauled – these questions get you there faster than deciphering the class number.
- SŽ and SZ mean the same: the Ž is missing in many databases, so it's worth searching for both spellings.
- Slovenia runs on 3 kV DC, so diesel vehicles are used wherever there's no overhead line.
- Fleet and areas of operation are subject to change – older railcars are modernised, redeployed or replaced.
Contents
Fact file
| Vehicle type | Diesel railcar for passenger services |
|---|---|
| Operator | Slovenske železnice (SŽ), Slovenian Railways |
| Class group | At SŽ, classes 711, 713 and 715 form the group of older diesel railcars |
| Traction | Diesel power – independent of overhead wire |
| Network electrification system | Slovenia electrifies at 3 kV DC; diesel vehicles cover the rest |
| UIC country code | 79 for Slovenia |
Identifying features
Is this really the class in front of you?
- Cab at both ends of the vehicle, with passenger windows directly behind
- No pantograph, but exhaust and cooling air openings on the roof or bodyside
- Short unit – one vehicle or a few coupled units instead of a long rake of coaches
- The class number 715 appears together with the serial number on the bodyside
- Vehicle number with UIC country code 79 points to Slovenian registration
- Typically found on lines without overhead wire, not on the electrified main routes
Updated: August 2026 – A short railcar, engine noise coming from the vehicle itself, no overhead wire above the track: that’s the typical appearance of the SŽ 715. This page places the class in the Slovenian rolling-stock system, shows how to tell it apart from its neighbouring classes, and explains why, for this group of vehicles, the vehicle number matters more than any detail feature.
Note the number, not just the class
With closely related railcar classes, the vehicle number decides – in Traintrack it's captured in seconds.
What is the SŽ 715?
The Class 715 is a diesel railcar of Slovenian Railways, in Slovenian Slovenske železnice, SŽ for short. A diesel railcar is a vehicle that combines traction and passenger space in one body: it runs without a locomotive, without a driving trailer and without an overhead line.
Within the Slovenian fleet, the 715 belongs to the group of older diesel railcars, together with classes 711 and 713. This close relationship is the single most important point for identification in the field: the three classes do the same job, run in the same environment and can hardly be told apart reliably from a distance. If you want to name the class, you need the vehicle number.
A practical note on spelling: SŽ and SZ mean the same. The Ž isn’t displayed in many timetables, databases and forums, which is why the same class turns up under both spellings. When researching, always try both variants.
Vehicle type first, class second
With foreign vehicles, identification rarely fails because of the technology and mostly because of the order you work in. If you look for the number first, you lose time. If you clarify the vehicle type first, you’ve already done most of the work.
Quick identification: what's actually running there?
Diesel railcar
No pantograph, passenger space right up to the front, no overhead line: that fits the 711 / 713 / 715 group. Exactly which class only the vehicle number will tell you.
Electric multiple unit
With a pantograph and under overhead wire, you're looking at the network's electric multiple units – which rules out the 715.
Loco-hauled train
An engine room without windows behind the cab points to a locomotive. In that case it's not a railcar but a rake of coaches.
It’s worth cross-checking within its own group against the SŽ 711 and the SŽ 713 – both are diesel railcars of the same category. How to systematically tell such closely related vehicles apart is described in the guide to identifying rolling-stock classes.
A side shot saves the sighting
Front shots look good, but with related classes they rarely serve as proof. Always take an extra picture in which the vehicle number on the bodyside is legible – blurred if need be, as long as it can be deciphered.
Where it fits in operations: where diesel vehicles run in Slovenia
Slovenia electrifies its lines at 3 kV DC. The division of labour on the network follows almost automatically from this, and for observation purposes it’s more useful than any diagram list.
| Type of line | Typical vehicle | Chance of a diesel railcar |
|---|---|---|
| Electrified main line | electric multiple units and loco-hauled trains | low |
| Non-electrified branch line | diesel railcars | high |
| Cross-border services | multi-system vehicles | low |
| Freight | diesel and electric locomotives | low |
| Stations where lines diverge | mixed | medium |
The contrast within the Slovenian fleet is part of the appeal: alongside the older diesel railcars there are modern vehicles such as the SŽ 610 (Stadler FLIRT DMU) and the electric SŽ 312 (Stadler FLIRT). Catch both on the same day and you’ve captured the transition between two generations of vehicles.
Important: which class currently runs on which line changes with timetable years, modernisation programmes and new procurements. Older railcars are redeployed, placed in reserve or replaced. So always check the current situation rather than relying on older overviews.
See what others have just reported
Community sightings show you which stock is actually out and about – across the border too.
Spotting and photography
A single railcar on a quiet line is a rewarding subject – as long as you don’t treat it like a long-distance train.
Include the surroundings
A short vehicle doesn't fill the frame. Instead of zooming in closer, deliberately work the landscape or the station surroundings into the picture.
Plan for two pictures
One for visual impact, one as proof with a legible vehicle number. If you only take one, you have to choose between the two.
Allow for little traffic
On lightly used lines, every train counts. Be at your spot early and expect a missed train to cost you half the day.
Keep your distance
The platform edge and safety line apply even where trains rarely run. Tracks, crossings and operational railway land are off limits – without exception.
The basic technique – choice of viewpoint, light, shutter speed – is covered in the guide to good photos of trains. Which numbers appear where on the vehicle and on displays, and how to tell a train number from a vehicle number, is explained in the article on finding the train number. The community collects and discusses sightings from across the border in the places listed in the guide to international sightings.
Common mix-ups
It points to the 711 / 713 / 715 group if …
- the vehicle has a cab at both ends followed by passenger space
- there's no pantograph
- the unit is short and running on a line without overhead wire
- the vehicle number starts with 71
Look more closely if …
- you can't read the number – then it's still open whether it's a 711, 713 or 715
- the vehicle has been modernised and looks out of place visually
- the railcar is standing under overhead wire; that doesn't rule out diesel traction
It's not a 715 if …
- there's a pantograph on the roof
- an engine room without windows begins behind the cab
- the vehicle number starts with a different class
Verdict
The SŽ 715 is a vehicle where honesty pays off: the vehicle type can be determined beyond doubt in seconds, but the specific class only via the number on the bodyside. If you accept that and photograph accordingly, you get clean sightings. If you rely on your first impression, sooner or later you’ll confuse it with a neighbouring class. And because the fleet and areas of operation of older railcars keep shifting, every documented encounter is worth more than second-hand information.
In short
Diesel railcar of Slovenian Railways from the 711 / 713 / 715 group. You recognise the vehicle type by the missing pantograph and the passenger space right up to the front – the class itself only by the vehicle number.
Your Slovenian sightings in one place
Class, vehicle number, location and date in one app – so even a sighting from a branch line can be found again later.
Summary
- The Class 715 represents the classic Slovenian diesel railcar on lines without overhead wire.
- Distinguishing it from neighbouring classes 711 and 713 in the field only works via the vehicle number, not the first impression.
- Slovenia's rolling stock is still shaped by the Yugoslav era, supplemented by modern Stadler multiple units.
- Because public technical data on older railcar classes is thin, every documented sighting with number and date is particularly useful.
Frequently asked questions
What is the SŽ 715?
The 715 is a diesel railcar class of Slovenian Railways (Slovenske železnice). A diesel railcar combines traction and passenger space in one vehicle: it runs under its own power, needs neither a locomotive nor an overhead line, and is therefore typically used on non-electrified lines.
How do I tell the 715 from the 711 and the 713?
Usually not by appearance alone – the three classes belong to the same vehicle group and are used in the same environment. The reliable distinction comes from the vehicle number on the bodyside, whose first three digits give the class. If you only have a photo of the front, you often can't make a definitive identification.
Why should I note the class number at all?
Because it's the only unambiguous piece of information. Design, livery and location can be similar or change; the number doesn't. A sighting without a number is hardly usable in hindsight – with number, date and location it becomes a reliable entry, especially for vehicles about which there is little public data.
What power supply does the railway in Slovenia use?
The electrified lines run on 3 kV DC. That's a different system from Germany (15 kV / 16.7 Hz) or Austria, and one reason why vehicles used across borders have to handle several electrification systems. Diesel railcars sidestep the question entirely because they don't need overhead wire.
What does SŽ mean and why do you also see SZ?
SŽ stands for Slovenske železnice. Because the Ž isn't displayed in many databases, timetables and forums, the makeshift spelling SZ has become established. It refers to the same company and the same class – when researching, you should try both variants, otherwise you'll miss results.
Do Slovenian vehicles date from the Yugoslav era?
Many older classes do. Before independence, the network belonged to Jugoslovenske železnice (JŽ), and a considerable part of the fleet was taken over and kept in service. Today it is supplemented by modern multiple units, including from Stadler. It's this mix that makes the Slovenian network interesting for spotters.
Where do I have the best chance of seeing a diesel railcar?
On lines without overhead wire. This rule is more reliable than any diagram list: where there's no overhead wire, only a vehicle with its own traction can run. On electrified main lines the probability drops considerably, because electric multiple units and loco-hauled trains handle the traffic there.
Why can't I find power output or build-year figures on this page?
Because publicly available information on older railcar classes of smaller railways is thin and often contradictory. Made-up or unchecked values would be worse than none. You don't need them for identification in the field anyway – vehicle type, class and vehicle number are entirely sufficient.
Log your sighting of the SZ 715
Date, location and vehicle number logged in seconds – and visible to the community.
Related classes
SZ Class 713
The SŽ 713 is a diesel railcar of Slovenian Railways. Here's how to read the series number, recognise the vehicle type and place it within the Slovenian network.
DMUSZ Class 711
The Class 711 is a diesel railcar of Italian origin on Slovenian branch lines. Here's how to recognise it and how to make sense of the SŽ numbering system.
DMUSZ 610 (Stadler FLIRT DMU)
Class 610 is Slovenia's modern diesel multiple unit for lines without overhead wires. Here's how to recognise it and how to tell it apart from electric multiple units.
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