Schneider Electric RM22UA33MR Harmony Voltage Control Relay 8A 2CO 15-500V AC/DC 24-240V Control Relay

The Schneider Electric RM22UA33MR is a Harmony RM22-UA single-phase voltage control relay, measuring a 15-500 V AC/DC signal for overvoltage or undervoltage conditions in window mode while powered from a 24-240 V AC/DC supply. It switches two 8 A changeover contacts in a 22.5 mm wide DIN rail housing with a front diagnostic button.

Technical Specifications

Certifications & Standards

• RCM
• UL
• EAC
• CSA
• CE
• GL
• CCC
• IEC 60255-1

Selection Notes

The 15-500 V measurement range on RM22UA33MR covers mains-level single-phase circuits directly, where the 1-100 V RM22UA32MR sibling would need a voltage divider ahead of it. Both parts share the same 24-240 V AC/DC supply, 2 C/O 8 A output and 22.5 mm housing, so the choice between them depends only on whether the monitored signal is a low-voltage sensor output or a line-level circuit - specify the RM22UA33MR directly on 110 V, 230 V or similar single-phase supplies without additional signal conditioning. Reliability data rates the RM22UA family at B10d = 290,000 operations and an MTTFd of 308.2 years, consistent across the 1-100 V and 15-500 V measurement-range variants since the output stage and mechanical contacts are shared hardware.