The ABB GHS2101926R0003, also designated as DSW3, is a pre-cut DIN rail section from the ABB Stotz DSW series. Designed specifically for single mounting applications, this 3-module rail section provides a convenient solution for installing small groups of modular electrical devices without the need for cutting longer rails onsite.

Standard Compliance and Profile: The rail conforms to EN 60715 (IEC 60715), the international standard governing dimensions of mounting rails for low-voltage switchgear and controlgear assemblies. It features the widely adopted 35 x 7.5 mm "top-hat" (O-profile) configuration, which serves as the industry standard mounting platform for miniature circuit breakers, residual current devices, terminal blocks, interface relays, power supplies, and various other DIN rail-mountable components. The 7.5 mm height provides secure engagement with standard mounting clips and latches.

Dimensions and Modular Design: This section is precisely dimensioned to accommodate three devices each requiring a standard module width of 17.5 mm. The overall rail width is 35 mm, matching the standard width of the EN 60715 profile. The depth is 7.5 mm, consistent with the low-profile configuration. This modular length approach eliminates the waste and effort associated with cutting down longer rails, making it ideal for small control panels, demonstration boards, test benches, and field repair kits.

Installation Features: The rail section is engineered for single mounting applications on flat surfaces. Two pre-drilled mounting holes are provided for securing the rail with screws directly onto backplates, enclosures, or panel surfaces. The single mounting configuration is particularly suitable for standalone installations where a full-length rail is not required or for adding small groups of devices to existing setups. The rail can be oriented vertically or horizontally depending on panel layout requirements.

Material and Construction: DIN rails are typically manufactured from galvanised steel, offering an optimal combination of mechanical strength, dimensional stability, and corrosion resistance. The galvanised finish provides protection against oxidation and environmental exposure while maintaining electrical conductivity for grounding purposes when required. The material thickness ensures sufficient rigidity to support the weight of mounted devices without deflection or deformation during normal service.

Application Scenarios: The DSW3 rail section is ideally suited for a broad range of applications including small distribution boards and consumer units, control cabinet sub-assemblies and modular inserts, equipment test and prototyping stations, educational training panels and demonstration boards, field service kits and portable maintenance panels, retrofit installations requiring additional device mounting capacity, laboratory and workshop power distribution setups, industrial machine control cubicles, building automation and HVAC control panels, and solar combiner boxes and renewable energy installations.

Device Compatibility: The EN 60715 35 x 7.5 mm profile serves as the universal mounting platform for virtually all modern DIN rail-mountable electrical and electronic devices. Compatible equipment includes ABB System Pro M Compact S200 series miniature circuit breakers, terminal blocks of all major manufacturers, interface relays and solid-state relays, power supplies and UPS modules, surge protective devices (SPDs), time relays and monitoring relays, contactors and motor starters, programmable logic controllers (PLCs), I/O modules and fieldbus couplers, residual current devices (RCDs/RCCBs), and energy meters and measurement modules.

Compliance and Environmental: The GHS2101926R0003 is RoHS compliant (Date of RoHS guidelines: March 31, 2015) and is certified SVHC free (Substances of Very High Concern), ensuring compliance with REACH environmental regulations. The product is manufactured in Germany (country of origin: DE) with customs tariff number 85389099 (Parts suitable for use solely or principally with the apparatus of heading 8535, 8536 or 8537). The EAN for the product is 4012233135806, and the Bürklin Elektronik order number is 05N484.

Selection Considerations: When selecting DIN rail sections, users should consider the total width requirement of all devices to be mounted. One module is equivalent to 17.5 mm. For the DSW3 section, the effective mounting capacity is three modules. For larger installations, ABB offers longer sections including DSW6 (6 modules) and other variants. Users should also verify that all intended devices are designed for 35 x 7.5 mm top-hat rail mounting, which represents the vast majority of modular electrical equipment available today.

Installation Guidelines: Mount the rail section onto a clean, flat surface using appropriate screws through the two pre-drilled mounting holes. Ensure the rail is level and securely fastened before clipping devices into place. Devices are typically installed by hooking the upper edge onto the top of the rail and pressing downward until the lower retaining clip engages with an audible click. Removal is accomplished by inserting a screwdriver into the release slot or tab and prying upward. For applications involving heavy devices or significant vibration, additional support or screw-fixing of devices may be recommended.

Comparison to Alternatives: Unlike full-length rails that require cutting, deburring, and careful measurement, this pre-cut 3-module section offers immediate usability for small installations. It eliminates the need for specialised cutting tools and reduces installation time. Compared to plastic mounting channels or backplates, the steel DIN rail provides superior mechanical strength, dimensional accuracy, and consistent device retention. For applications requiring frequent device reconfiguration, the DSW3 section facilitates modular system design where entire sub-assemblies can be pre-wired and swapped as units.