22.23.9.024.4000 SPST-NC, SPST-NO Non-Latching Relay DIN Rail. The 22 Series are available as DPST-NO or SPST-NO + SPST-NC relays. Equipped with 20A, 250VAC contacts rated at 5000VA AC1, they are ideal for use in commercial applications including heating, air conditioning and lighting. The relays have a nominal lamp load rating of 1000W for incandescent and 360W for compensated fluorescent.