Key takeaways
- “Silberfischli” is a nickname, not an official type: it derives from the silvery, pale bodyshell.
- RABe decoded: R = fast-running, A = 1st class, B = 2nd class, lower-case e = electric traction.
- The 526 series is allocated more than once – design and serial number must be checked as well.
- Photographically demanding: a pale, reflective bodyshell tends to burn out in harsh light.
- Operator and livery can change, the design can't – that's what you should rely on.
Contents
Fact file
| Vehicle type | Electric multiple unit for regional services |
|---|---|
| Vehicle family | Stadler FLIRT (low-floor articulated multiple unit) |
| Operator | Schweizerische Südostbahn (SOB) – responsibilities may change |
| Designation | RABe = fast-running multiple unit with 1st and 2nd class, electric |
| Number series | 526 – allocated more than once in Switzerland |
| UIC country code | 85 (Switzerland) |
| Nickname | “Silberfischli”, derived from the silvery, pale bodyshell |
Identifying features
Is this really the class in front of you?
- Strikingly silvery, pale bodyshell with little colour – hence the nickname
- Single-deck articulated unit with short intermediate modules over shared bogies
- Step-free low-floor entry in the middle of the cars
- Südostbahn markings rather than SBB branding – a clue, not proof
- Vehicle number with the series 526 and the country code 85
- No short power module in the middle of the train – that would be a GTW
Updated: August 2026 – Some vehicles are better known by their nickname than by their series number. The Südostbahn’s Silberfischli is one such case: the name describes the silvery, pale bodyshell, while the series number 526 describes almost nothing, because it’s allocated more than once in Switzerland. This page brings the two together.
Spotted a Silberfischli? Record its condition.
Liveries and wraps change – with number, date and photo, your entry stays meaningful later on too.
What is the SOB RABe 526 “Silberfischli”?
The Silberfischli is an electric low-floor articulated multiple unit of the FLIRT family from Stadler Rail in the branding of the Schweizerische Südostbahn. In terms of design, it belongs to the same family as numerous other Swiss regional units: longer end modules, short intermediate modules over shared bogies, step-free entry, cabs at both ends.
What sets it apart isn’t the technology but its appearance. The strikingly pale bodyshell with little colour earned the vehicle its nickname – and that nickname has caught on among rail fans more than any series number.
Where the nickname comes from
In the railway world, nicknames almost always arise from a visual impression, not from technical data. With the Silberfischli (Swiss German for “little silverfish”) it’s the silvery, pale surface that reflects strongly in sunlight and distinguishes the train from colourfully painted vehicles even from a distance.
For identification that means two things. First: the nickname is an excellent starting point, because it describes a feature you see immediately. Second: it’s not proof. Appearances change with repaints, vinyl wraps and advertising liveries. How to track down and document such changes is described in the article on advertising locomotives and special liveries.
It’s also typical for nicknames to vary in how widely they’re used from region to region. What every spotter understands in one region means nothing to anyone two hundred kilometres away – and occasionally the same name migrates to another vehicle because the look fits there too. For your own records, a nickname is therefore at best an extra field. The unique key remains the vehicle number, because it doesn’t change with usage, a change of operator or a repaint. If you note both together, you have both a useful conversation starter and reliable evidence.
The designation RABe 526 decoded
| Character | Meaning | What you can read from it |
|---|---|---|
| R | fast-running vehicle | Designed for more than local traffic |
| A | 1st class on board | Separate 1st class area |
| B | 2nd class on board | Main part of the seating |
| e (lower case) | electric traction | Pantograph on the roof |
| 526 | Series number | Allocated more than once – not unique on its own |
The core of the Swiss system in one sentence: capital letters say what the train carries, lower-case letters how it’s powered. An m would stand for an internal combustion engine. If there’s no lower-case letter at all, the vehicle has no traction of its own – that’s exactly how you recognise a driving trailer in Switzerland. On older vehicles, a fraction replaces the three-digit series: numerator equals powered axles, denominator equals total axles.
How to recognise the Silberfischli
Assess the bodyshell
Silvery-pale, little colour, strongly reflective: that's the quickest starting point – but only a clue.
Check the middle of the train
No short power module between two halves of the train? Then it's not a GTW but a FLIRT.
Read the markings
Südostbahn branding rather than SBB branding supports the identification. Operators can change, though.
Note the full number
Country code 85, series 526 and serial number – only together do they give a unique identification.
The basic order – coarse features first, then fine ones – is explained in the guide to identifying classes.
Current sightings instead of old lists
See in the app where which vehicles were last reported – and plan your trip accordingly.
Where you’ll come across the Silberfischli
Because the vehicle is a regional multiple unit by design, it also follows the typical operating pattern of this type: frequent interval services, many stops, reversing at the ends of the line. From that you can estimate your chances at a location fairly well without having to know individual diagrams.
| Location | Chance of a sighting | Why |
|---|---|---|
| Regional hubs with interval services | high | Many stops, reversals and platforms with a good view |
| Interchange stations for several lines | high | Several diagrams meet |
| Pure long-distance corridors | low | Other vehicle categories run there |
| Pure freight lines | very low | No scheduled passenger services |
| Depots and stabling sidings | irrelevant | Operational railway land – not an accessible location |
Deployment and responsibilities change
Which services an operator runs depends on contract awards and timetable years. Treat every deployment detail as a snapshot and check the current situation before you plan a long journey.
Photography: keeping the pale bodyshell under control
Photographically, a silvery-pale surface is the opposite of a dark locomotive. It reflects strongly and burns out quickly in harsh light – and with it, markings, panel joints and texture disappear.
- Prefer soft or low light: early morning, late afternoon, slightly overcast sky.
- Expose for the highlights. Better to underexpose slightly; blown highlights can’t be rescued, shadows can.
- Choose an oblique view, so that the reflections spread across the surface instead of appearing as one glaring patch.
- Take a record shot of the markings while the train is standing – against the pale base colour, numbers are hard to read from a distance.
The basic technique – viewpoint, plane of focus, exposure, panning – is covered in the guide to good photos of trains. As for location, the rule is unchanged: platforms and public paths yes, track areas and operational railway land no.
Common mix-ups
Realistic candidates are the SOB RABe 526 (Traverso), the SBB RABe 526 (Thurbo FLIRT) and the Thurbo RABe 526 (GTW), which is clearly different in design.
It points to the Silberfischli if …
- the bodyshell is strikingly silvery-pale with little colour
- the train is articulated with short intermediate modules
- the markings can be attributed to the Südostbahn
- the vehicle number contains the series 526
Look more closely if …
- the design fits but the appearance is more colourful than expected
- the train carries an advertising wrap that covers the base colour
- you could only read the series number, not the serial number
It's not a Silberfischli if …
- a short power module sits in the middle between two halves of the train
- the train has two passenger decks one above the other
- the designation contains an m or has no lower-case letter at all
Conclusion
The Silberfischli is a lesson in how nickname, designation and number work together. The nickname leads you to the right vehicle in seconds, the sequence of letters tells you what it can do, and only the full vehicle number makes the identification unique. If you only look at the colour, you’ll get it wrong at some point – colours change, designs don’t.
In short
Pale bodyshell plus FLIRT articulated design plus series 526: that's the Silberfischli. For your records, the serial number is still what counts – and a photo that doesn't let the pale surface burn out.
Document conditions, not just vehicles
Number, date, appearance and photo in one place – that's how your sightings become a real time series.
Summary
- The SOB RABe 526 is an electric low-floor articulated multiple unit of the FLIRT family in Südostbahn branding.
- The nickname “Silberfischli” goes back to the silvery, pale bodyshell and is more common among rail fans than the series number.
- Because the 526 series is allocated more than once, only the combination of design and full number leads to a reliable identification.
- When photographing, exposure is what matters: the pale bodyshell doesn't cope well with harsh midday light.
Frequently asked questions
Why is the SOB RABe 526 called “Silberfischli”?
The nickname refers to its appearance: the units stand out with a silvery, pale bodyshell that reflects strongly in sunlight. Among rail fans, nicknames like this almost always arise from a visual impression and catch on because they're more memorable than a three-digit series number. “Silberfischli” is Swiss German for “little silverfish”.
What does the designation RABe 526 mean?
R stands for fast-running, A for 1st class, B for 2nd class, the lower-case e for electric traction. 526 is the series number. In Switzerland, capital letters describe the classes of accommodation carried and lower-case letters the type of traction – so the designation is itself a short description of the vehicle.
Who is the SOB?
The Schweizerische Südostbahn is an independent railway company with its own fleet and its own branding. For vehicle identification, the operator is a soft feature: responsibilities, markings and liveries change with contract awards and rebuilds, but the design stays the same.
How do I tell the Silberfischli apart from other 526s?
First by the design: FLIRT means an articulated unit with short intermediate modules, GTW means a short power module in the middle of the train. Then by the look of the bodyshell, and finally by the full vehicle number with the serial number, which is the only thing that's truly unique.
How do I photograph a silvery bodyshell properly?
Ideally in soft or low light. Pale, reflective surfaces quickly burn out in harsh midday light, so markings and texture are lost. Slight underexposure protects the highlights; detail in the shadows is easier to recover later than blown highlights.
Is the Silberfischli a regional or a long-distance train?
The basic low-floor FLIRT is designed for regional services with many stops. Which services it actually runs depends on the timetable and on contract awards, and that changes – so check the current situation rather than older overviews.
Are nicknames any use for identification?
As a starting point yes, as proof no. Nicknames spread differently from region to region and are occasionally applied to several series. They help in conversation between spotters, but they don't replace checking the design and the vehicle number.
Is it worth documenting liveries?
Yes. Liveries and vinyl wraps change more often than designs, and any given condition only exists for a window of time. If you note the number, date and appearance together, you'll later have a real time series rather than a mere list.
Log your sighting of the SOB RABe 526 (Silberfischli)
Date, location and vehicle number logged in seconds – and visible to the community.
Related classes
SOB RABe 526 (Traverso)
The SOB RABe 526 “Traverso” is a multiple unit from the FLIRT family built for longer journeys. Here's how to recognise it and tell it apart from the other 526 series.
EMUSBB Class RABe 526 (Thurbo FLIRT)
Several quite different vehicles in Switzerland carry the series 526. Here's how to identify the Thurbo FLIRT and avoid mixing it up with its namesakes.
EMUThurbo RABe 526 (GTW)
The Thurbo RABe 526 is a GTW – recognisable by the short power module in the middle of the train. And the fraction 2/6 or 2/8 instantly tells you how many axles are powered.
EMUSBB Class RABe 523 (FLIRT)
The RABe 523 is a Swiss FLIRT series for regional traffic. Because several series share the same design, the series number decides – here's how to read it correctly.
EMUSBB Class RABe 524
The RABe 524 is an electric multiple unit from SBB's FLIRT family. Here's what the designation means and how to identify it beyond doubt.
EMUSBB Class RABe 531
The RABe 531 is an electric multiple unit from SBB. This page shows how to identify it reliably through the Swiss designation and a fixed chain of features.
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