What it is and where it fits
The Omron K8AK-TH11S 24VAC/DC is an active-production temperature monitoring relay designed for DIN-rail mounting. It accepts inputs from K, J, T, or E thermocouples as well as Pt100 or Pt1000 RTDs, making it a versatile single-point over-temperature or under-temperature detector for industrial control panels. The relay output is a single-pole double-throw (SPDT) contact rated 5 A at 250 VAC — enough to switch small heaters, cooling fans, alarms, or signal lamps directly without an interposing contactor. Supply voltage is 24 VAC/DC, so it runs from a common control transformer or DC power supply found in most cabinets. No delay timer is built in; it responds immediately to a temperature fault.
Lifecycle and sourcing
Sourcing is straightforward: quote to order against an RFQ for your required quantity and timeline. Given its active status, lead times are typically short and the supply chain stable.
Key ratings explained
The SPDT contact rating of 5 A at 250 VAC is sufficient for most alarm circuits and light industrial loads. For higher loads, use the relay to pilot a contactor. Operating temperature range of -20°C to 55°C covers typical panel environments; note that the 55°C upper limit is the relay's ambient, not the process temperature being monitored — the sensor type determines process range.