Product Overview

The ABB 2ML-C42A-CC​ is a 2-pole, 4 A, C-curve miniature circuit breaker (MCB) in the 2ML DIN-rail family that originated under GE Industrial Solutions and now sits inside ABB’s Low Voltage portfolio following the 2017 ABB–GE IS integration. It is a thermal-magnetic trip device: the C-curve characteristic (trip at 5–10× rated current, i.e. 20–40 A for the C42A) targets standard non-motor loads such as control-panel auxiliary branches, PLC I/O feed legs, sensor/SIPART/positioner 24 V taps, solenoid valve branches, and relay-coil circuits — anything where the inrush is modest (typically < 5–7× steady) and the designer wants a 4 A branch that won’t nuisance-trip on contactor pickup but will clear a short or a locked solenoid. Rated 230/400 V AC, 10 kA breaking capacity (typical for the 2ML industrial class; confirm per unit label as some regional builds may show 6 kA), the ABB 2ML-C42A-CC​ is built to IEC 60898 / IEC 60947-2 and carries CE/UL listings (UL 489 or UL 1077 depending on regional build — check the unit label before specifying into a UL-panel filing).Physically the 2ML-C42A-CC​ is a standard-width DIN slice — 2× 18 mm pitches (≈36 mm wide for a 2-pole) — snap-fits onto a 35 mm EN 60715 rail alongside the panel’s other DIN modulars: the 1KHL178012R0016A TRM01​ PSU (previous catalog listing), any XC08L1​ Freelance extensions, surge arresters, relay interface modules, and the S800 I/O MTU row if the panel carries one. Front-face has the toggle (ON/OFF/TRIPPED mechanical indicator — tripped toggle sits center, not fully DOWN, which is the classic MCB tell) and a windowed flag that shows “ON / OFF / TRIPPED” without removing the DIN row dress-cover. Operating range typically –25 °C to +55 °C (some docs –20 to +60, confirm per label), storage –40 to +70, IP20 (cabinet interior), humidity 5–95% RH non-condensing.For MRO planners on plants that were GE-IS houses before the ABB acquisition — North American process plants, power-gen aux bays, data-centre MV/Genset switchgear buildings, packaged-boiler UCPs, compressor skids — the ABB 2ML-C42A-CC​ is the “keep-the-BOM-as-is” spare: you don’t have to cross-grade to an ABB S202-C4 (native ABB S200) unless you want to; the 2ML carries forward under ABB LV sourcing with the same 2ML-C42A-CC order code. That continuity matters because re-filing a UL panel from “2ML” to “S200” triggers a panel-shop re-review; keeping the 2ML-C42A-CC​ on the BOM keeps the as-built intact. The CC suffix at the end of the model is a GE/ABB LV packaging/build-code (sometimes “CC” = “with compliance certs” or a regional packaging variant — confirm against your removed-unit label, as with every suffix-discipline item in this catalog).

Technical Specifications