For a small control panel with a handful of components — a main switch, an RCCB, a couple of MCBs, a terminal block — a full metre of DIN rail is excessive. The ABB DSW4 is a pre‑cut 4‑module section that delivers exactly enough rail length for four standard 17.5 mm devices, with no cutting required.

What Four Modules Gets You
One module equals 17.5 mm. Four modules give you 70 mm of usable rail length. Typical configurations include four 1‑pole MCBs, two 2‑pole devices, one 2‑pole plus two 1‑pole, or a compact RCBO paired with a terminal block. The DSW4 is the most popular size in the DSW series because it matches the width of many small distribution enclosures.

Where You Use It
The DSW4 is ideal for small consumer units in flats and apartments, lighting control panels with four circuits, test and measurement setups, HVAC control panels, small machine control cabinets, portable power distribution boxes, and educational training panels. It is also useful as a dedicated rail section inside a larger enclosure for isolating a specific functional group.

The Rail Itself
The DSW4 follows EN 60715 (DIN EN 60 715) for 35 × 7.5 mm top‑hat rail. The profile is the standard O‑shape that snaps securely into the mounting clips of MCBs, RCCBs, RCBOs, terminal blocks, relays, power supplies, and most other DIN rail components. Material thickness is 1 mm, and the galvanised surface provides corrosion resistance. Weight is approximately 24 g.

Installation Details
Two pre‑drilled screw holes allow direct mounting onto flat surfaces. Position the rail, mark the hole positions, drill, and secure with screws. The rail can be oriented horizontally or vertically. The galvanised finish ensures long‑term corrosion resistance even in humid environments.

Family Consistency
The DSW4 is part of the ABB Stotz DSW series of pre‑cut rail sections. Other members include DSW1 (1 module), DSW2 (2 modules), DSW3 (3 modules), and DSW6 (6 modules). All share identical material, profile, and finish, differing only in length. This allows modular assembly where multiple sections can be placed end‑to‑end if a longer rail is needed.

Numbers and Compliance
Full part number: GHS2101926R0004. EAN: 4012233136100. Bürklin order number: 05N486. Country of origin: Germany. RoHS compliant, SVHC‑free (Date of RoHS guidelines: March 31, 2015).