Omron Current Monitoring Relay With SPDT Contacts, 100 → 240 V ac Supply Voltage, 1 Phase

  • RS Stock No. 111-3091
  • Mfr. Part No. K8DT-AS2CA
  • Brand Omron
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): CN
Product Details

K8DT-AS/AW Single Phase Current Relay

Omron K8DT-AS/AW single phase current relays detect errors in motors and other equipment through current changes.

Monitor AC or DC currents with one Relay.
Use with commercially available current transformers
Width of 17.5 mm to reduce space required in panels.
Push-In Plus Terminal that reduce wiring work.
Double-insertion holes for crossover wiring (all terminals).


K8DT-AS allow use in either overcurrent or undercurrent mode.
K8DT-AW allow overcurrent and undercurrent monitoring simultaneously

K8DT-AS Monitoring Motor Protection Relay.

• Downsize control panels.
• Reduced wiring.
• Detects errors in Motors and other equipment via current changes.
• Use in either over current or under current mode.
• Function as an alarm.
• Set threshold values.
• Alarm output can be set as a relay or transistor output.
• Input signal – Voltage, current, water level electrode and temperature (thermocouple or platinum resistance thermometer) can be input.
• Lower power consumption.
• Long term contact reliability.
• Reliable in poor noise environments.
• Slim profile 17.5 mm

K8DT-AS2CA 100 to 240 VAC Model.

• Current Monitoring Relay.
• Single phase.
• SPDT Contact output.
• Power supply 100 to 240 V ac.
• Setting range 0.1 to 1 A ac/dc, 0.5 to 5 A ac/dc
• Direct input or available current transformer.
• If using other current transformers Do Not exceed the overload capacity.

Features and Benefits.

• Power supply 100 to 240 V ac, 50/60 Hz, 24 V dc
• Manual/ Automatic reset (switchable)
• Manual reset – Turn OFF the power supply for minimum of 1 sec.
• Start-up lock time 0 to 30 s.
• Green LED Power (PWR)
• Yellow LED output (OUT)
• Red LED Relay output (ALM)
• One SPDT contact relay, switchable normally closed (NC) and normally open (NO) using DIP switch.
• DIN Rail Mounted
• Weight 100 g
• Case material PC, UL 94 V-0.
• Colour N1.5
• Protection IP20 (terminals)

What is a Monitoring / Measuring Relay?

A monitoring / measuring relay is a protective control device, various types are available suiting what you wish to monitor. The relays receive input signals then monitor them and then output an alarm signal when a set value is reached (alarm relays). The relays protect your equipment against over voltage and over current faults. Monitoring relays monitor AC power supplies, voltage and current, analogue signals detecting unusual activity in equipment against set alarm thresholds.

Types of Monitoring Relays Available?

• Motor protection relays
• Temperature monitoring relays
• Water level control relays
• Voltage
• Current


EN 60947-5-1, UL 60947-5-1, IP 20 Terminals

Omron K8DT Series Control Relays

Omron K8DT measuring and monitoring relays are part of the Value Design for Panel concept that takes control panel design and manufacturing to a new level. The K8DT series protect important equipment from damage using various measuring and monitoring relays that conform to international safety standards. Low power consumption and low heat generation design offer a long service life.

Space Saving

The K8DT series can help downsize control panels by reducing the width between wiring ducts and void panel space. The slim body allows space to mount more devices in the same size of control panel to increase control panel functionality.

Push-In Plus Terminals

Push-In Plus terminal blocks on all K8DT relays reduce the time and work involved in wiring. The Push-In Plus terminals allow solid and stranded wires with pin terminals or ferrules to be inserted without the need for tools.

Attribute Value
Monitoring Application Current
Supply Voltage 100 → 240 V ac
Contact Configuration SPDT
Electrical Phase 1
Current Sensitivity Overcurrent, Undercurrent
Minimum Current Sensed 0.1 A, 0.5 A
Maximum Current Sensed 1 A, 5 A
Time Delay 250 ms
Terminal Type Screw
Mounting Type DIN Rail
Height 90mm
Maximum Operating Temperature +60°C
Operating Temperature Range -20 → +60 °C
Width 17.5mm
Length 90mm
Series K8DT-AS
Standards Met CCC, CE Certified, EN 60947-5-1, UL, UL 60947-5-1
Dimensions 90 x 17.5 x 90 mm
Number of Poles 1
Minimum Operating Temperature -20°C
Current Range 0.1 → 1 A, 0.5 → 5 A
6 In stock for FREE next working day delivery
Price Each
£ 83.20
(exc. VAT)
£ 99.84
(inc. VAT)
Per unit
1 +
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