DISTRIBUTOR-FIRST SUPPLY PARTNER · SINCE 1999 BRAND · SCHNEIDER ELECTRIC
Industrial electrical and automation components from a global leader.
Control. Protect. Automate.
Schneider Electric is a global leader in energy management and industrial automation, headquartered in Rueil-Malmaison, France. The company traces its origins to 1836 and today operates in over 100 countries, serving utilities, industry, infrastructure, data centers, and buildings with switching, protection, control, and monitoring products at every voltage level.
In the compressed-air and pump market, Schneider Electric is the source for the control switching hardware that keeps duplex compressor systems running efficiently. The TeSys SK alternating relay platform — the CA2SKE series — is the widely specified standard for lead/lag alternation of paired compressors or pumps: durable IEC-style switching contacts in a compact DIN-rail or plate-mount package, available across 120 V, 220 V, 240 V, and 480 V coil voltages for North American compressor-room applications. SPC sources Schneider Electric alternating relays through its distribution network — alongside the compressor mechanical components — so the switching hardware for a duplex system arrives with the compressor equipment it controls.
SPC sources Schneider Electric alternating relays through its distribution network, so the switching hardware arrives alongside the compressor equipment it controls — one order, one contact, no coordination gap between the mechanical and electrical sides of the job.
Alternating-relay sizing and enclosure selection are part of SPC's compressor system scope.
Through the distribution network, Schneider Electric component availability is backed by aggregated network demand, with SPC as the single point of contact for quoting, lead time, and after-sale support.
General Manufacturing → Duplex alternating relay controls for paired plant-air compressors. 
HVAC & Building Systems → Lead/lag alternation controls for paired HVAC pump and compressor systems. 
Oil & Gas / Energy → IEC-rated switching hardware for compressor control panels in industrial energy environments. 
Automotive Manufacturing → Reliable alternating relay controls for duplex compressor systems in production facilities. Select the CA2SKE20 model suffix to match the coil voltage: G7 for 120 VAC, M7 for 220 VAC, U7 for 240 VAC, T7 for 480 VAC. Mismatched coil voltage will prevent proper relay operation.
The CA2SKE20 carries a 10 A contact rating for direct switching of small starters or pilot circuits. For higher-current loads, the relay drives a contactor rather than switching the motor directly.
The 9991UE1 NEMA 1 surface-mount enclosure ships as a matched companion to the CA2SKE relay. Specify as a set for a pre-wired, compliant enclosure; specify the relay only when integrating into an existing panel.
Tell us the spec and the account and we will come back with the right line, sourced through the distribution network.
—. We reply within one business day with pricing, lead-time, and configured parts.