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

  • RS Stock No. 111-3107
  • Mfr. Part No. K8DT-VS2CA
  • Manufacturer Omron
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): CN
Product Details

K8DT-VS Single Phase Under/Over Voltage Relay

Omron K8DT-VS single phase voltage monitor relay detects abnormal voltages applies to equipment to protect against equipment failure. Can be used in either overvoltage or undervoltage mode.

Monitor AC or DC currents with one Relay.
Settings for the operating value, hysteresis, and operating time
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-VS Single-Phase Voltage Monitoring Relay.

• Downsize control panels.
• Reduced wiring.
• Detects errors in Motors and other equipment.
• 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.
• Side by side mounting is possible.
• Long term contact reliability.
• Reliable in poor noise environments.
• Slim profile 17.5 mm

K8DT-VS2CA Single Phase Voltage Relay.

• Power supply 100 V ac to 240 V ac.
• Detects abnormal voltages
• Use in over voltage or under voltage mode
• Protects you from equipment failures.
• SPDT Contact output.
• Single phase.
• Power ON lock time 1 s or 5 s (switched using DIP switch)
• Current capacity 10 A (per pole)
• Insertions 50 times. • Setting range – 1 to 10 V ac/dc, 3 to 30 V ac/dc, 15 to 150 V ac/dc

Features and Benefits.

• Automatic / Manual reset (switchable) (Manual reset turn OFF the power supply)
• Green LED Power (PWR) power
• Yellow LED Relay output (RY)
• Red LED output (ALM) alarm
• One SPDT contact relay. Switchable between NO (normally open) and NC (normally closed) using DIP switch.
• DIN Rail Mounted or Screw 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


EN60947-5-1, 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 Voltage
Supply Voltage 100 → 240 V ac
Contact Configuration SPDT
Voltage Sensitivity Overvoltage, Undervoltage
Electrical Phase 1
Voltage Sensing Range 1 → 10 V, 3 → 30 V, 15 → 150 V
Time Delay 250 ms
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 Voltage Sensed 1 V, 3 V, 15 V
Series K8DT-VS
Maximum Operating Temperature +60°C
Minimum Operating Temperature -20°C
Operating Temperature Range -20 → +60 °C
Length 90mm
Maximum Voltage Sensed 10 V, 30 V, 150 V
Mounting Type DIN Rail
Terminal Type Screw
Height 90mm
Width 17.5mm
7 In stock for delivery within 5 working day(s) (Global Stock)
Price (ex. GST) Each
$ 242.26
(exc. GST)
$ 266.49
(inc. GST)
Per unit
1 +
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