The Omron K8AK-TH12S 100-240VAC is a temperature monitoring relay that triggers an SPDT relay output when a thermocouple signal deviates from set thresholds. Rated for 100-240VAC supply — covers common line voltages in a single variant. The SPDT contact switches 5 A at 250 VAC, sufficient for alarm annunciation or pilot duty loads. No built-in delay; the relay responds immediately to a trip condition. Mounts on a DIN rail in the control panel. Operating range -20°C to 55°C suits ventilated enclosures.
Omron K8AK-TH12S 100-240VAC Temperature Monitoring Relay, SP
MPNK8AK-TH12S 100-240VAC
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Omron K8AK series, Temperature Monitoring Relay, SPDT (1 Form C), 100-240VAC supply, 5A @ 250VAC, DIN Rail mount, box packaging.
$78.36 – $190.89Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Series | K8AK |
| Type | Temperature Monitoring |
| Parameter | Value |
|---|---|
| Supply voltage | 100 ~ 240VAC |
| Parameter | Value |
|---|---|
| Output type | Relay |
| Parameter | Value |
|---|---|
| Operating temperature | -20°C~55°C |
| Parameter | Value |
|---|---|
| Mounting type | DIN Rail |
| Parameter | Value |
|---|---|
| Circuit | SPDT (1 Form C) |
| Delay time | No Delay |
| Contact rating @ voltage | 5A @ 250VAC |
Product details
Frequently asked questions
What type does this relay monitor?
It is a temperature monitoring relay intended for thermocouple input (TC), as indicated in the description.
What is the series of this component?
This belongs to the Omron K8AK series of monitoring relays.
MPN
K8AK-TH12S 100-240VAC