Motor switching capacity and load fit
The LC1F185R6: Rated 275 A operational current at 185 A in AC-3 duty at <=440 V — this is the figure that governs motor switching, not the thermal current. The contactor handles 90 kW at 380-400 V and 100 kW at 415 V in AC-3, which covers most European-standard 400 V motor frames up to that power class. Utilisation categories span AC-3 (squirrel-cage motor starting), AC-4 (plugging/inching), and AC-1 (resistive loads). The AC-4 rating at 33 kW at 400 V is notably lower — if the application requires frequent reversing or inching, that derating matters for contact life. Mechanical durability of 10 Mcycles gives a maintenance planning baseline. The electrical life will be shorter and depends on the switching current and voltage; the AC-3 electrical endurance curve in the TeSys F documentation should be consulted for the specific duty cycle.
Lifecycle reality — end-of-life sourcing
For a BOM freeze or a line-down situation, the procurement path is: submit an RFQ with the quantity and target lead time; availability and pricing are confirmed at quote time. No stock-holding claim is made here — this is a sourced-to-order part.
Panel integration and mounting constraints
Mounting is plate-based, not DIN rail — the contactor bolts to a backplate or mounting plate. The dimensions are 7.1 in (181 mm) deep, 6.6 in (168.5 mm) wide, 6.9 in (174 mm) tall, so it occupies a substantial footprint. Plan for the 25 x 3 mm power circuit bar connection and the 150 mm² lug/ring terminal capacity. Power circuit tightening torque is 159.3 lbf.in (18 N.m) — this is a high-torque connection that needs a torque wrench, not a screwdriver. Control circuit torque is 10.6 lbf.in (1.2 N.m). The IP2X front face with shrouds meets touch-safe requirements per IEC 60529, but only when the shrouds are fitted. Heat dissipation runs 18-24 W total, with 12 W per pole in AC-3 and 25 W per pole in AC-1. In a sealed enclosure, this heat must be factored into the thermal budget — the 3000 m altitude rating without derating assumes free air flow.
Compliance and documentation
Certified to IEC 60947-4-1 and EN 60947-4-1, the relevant product standards for contactors and motor-starters. Also carries JIS C8201-4-1 for Japanese market acceptance. Rated insulation voltage is 1000 V per IEC 60947-4-1 and 1500 V per VDE 0110 group C — the higher figure applies for clearance/creepage in pollution degree 3 environments. Overvoltage category III means it is suitable for fixed installation downstream of the main distribution board. The protective treatment 'TH' indicates tropicalisation — humidity and fungus resistance for harsh environments. The associated fuse rating is 200 A aM or 315 A gG at <=440 V for short-circuit coordination.