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K8DT

K8DT Series: Single-Phase Voltage and Current Monitoring Relays

The K8DT series represents a family of single-phase monitoring relays designed for precise voltage and current supervision in industrial automation systems. These compact DIN-rail mounted devices offer adjustable thresholds for overvoltage, undervoltage, overcurrent, and undercurrent...

K8DT Series: Single-Phase Voltage and Current Monitoring Relays

The K8DT series represents a family of single-phase monitoring relays designed for precise voltage and current supervision in industrial automation systems. These compact DIN-rail mounted devices offer adjustable thresholds for overvoltage, undervoltage, overcurrent, and undercurrent detection, with typical measuring ranges from 0-150V AC/DC for voltage models and 0-5A AC for current variants. Key technical specifications include a rated supply voltage of 24-240V AC/DC, output contact ratings of 5A at 250V AC (resistive load), and response times adjustable from 0.1 to 30 seconds. The series includes models like K8DT-VS (voltage), K8DT-AS (current), and K8DT-PH (phase sequence), all featuring LED status indicators and screw terminal connections for secure wiring. These relays are engineered for high reliability with an operating temperature range of -20°C to +60°C and a degree of protection IP20 for the enclosure.

K8DT monitoring relays are primarily deployed in electrical distribution panels, motor control centers (MCCs), and automation cabinets to protect sensitive equipment from power quality issues. Common applications include monitoring pump motors, conveyor systems, HVAC compressors, and lighting circuits in industrial plants, commercial buildings, and water treatment facilities. They are also used in renewable energy systems like solar inverters and wind turbine controls to ensure stable voltage and current levels. In process automation, these relays safeguard PLC inputs, variable frequency drives (VFDs), and other critical loads against abnormal electrical conditions.

The K8DT series encompasses several subcategories tailored to specific monitoring functions. The K8DT-VS voltage relay monitors single-phase AC/DC systems with adjustable overvoltage and undervoltage setpoints, typically coded as K8DT-VS2AA for 100-240V AC applications. The K8DT-AS current relay detects overcurrent and undercurrent conditions in AC circuits, with models like K8DT-AS2AA covering 0.1-5A ranges. The K8DT-PH phase sequence relay ensures correct phase rotation in three-phase systems, though it is less common in this single-phase focused series. Article codes generally follow the pattern K8DT-[Function][Generation][Voltage/Current Range], where function indicates VS (voltage), AS (current), or PH (phase), and generation denotes series updates.

Partnering with Electric Automation Network ensures access to genuine K8DT relays with real-time pricing and global express shipping. Our engineering team provides personalized technical support for selecting the correct model based on your voltage/current thresholds, response time requirements, and environmental conditions. We offer detailed datasheets, wiring diagrams, and application notes for each article, simplifying integration into your control systems. With our multilingual portal and worldwide logistics, you can secure critical monitoring components without delays, backed by expert guidance from fellow engineers.

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Manufacturer Code Reference Catalog Number Description Delivery Price

K8DT0012B

K8DT-AS3TD

K8DTAS3TD

Single phase Current Max or Min 10-200 To transistor 24V AC/DC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over or under current 10 to 200 A AC/ DC, 1 x Transistor, 24 V AC/DC

Monitoring relay 17.5mm wide, Single phase over or under current 10 to 200 A AC/ DC, 1 x Transistor, 24 V AC/DC

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K8DT0016E

K8DT-AW1TA

K8DTAW1TA

Single-phase Current, Max, and Min 2-500mA transistor 100-240VAC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over and under current 2 to 500 mA AC /DC, 1 x Transistor, 100-240 VAC

Monitoring relay 17.5mm wide, Single phase over and under current 2 to 500 mA AC /DC, 1 x Transistor, 100-240 VAC

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K8DT0039D

K8DT-VW2TD

K8DTVW2TD

Single-phase Voltage Max and Min 1-150VAC/DC 24V AC/DC 1 transistor 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over and under voltage 1 to 150 V AC /DC, 1 x Transistor, 24 V AC/DC

Monitoring relay 17.5mm wide, Single phase over and under voltage 1 to 150 V AC /DC, 1 x Transistor, 24 V AC/DC

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K8DT0019M

K8DT-AW1CD

K8DTAW1CD

Single-phase Current, Max, and Min 2-500mA SPDT 24V AC/DC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over and under current 2 to 500 mA AC /DC, 1 x SPDT, 24 V AC/DC

Monitoring relay 17.5mm wide, Single phase over and under current 2 to 500 mA AC /DC, 1 x SPDT, 24 V AC/DC

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K8DT0034C

K8DT-VW3CA

K8DTVW3CA

Single-phase Voltage Max / Min 20-600VAC/DC 100-240VAC 1 SPDT 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over and under voltage 20 to 600 V AC /DC, 1 x SPDT, 100-240 VAC

Monitoring relay 17.5mm wide, Single phase over and under voltage 20 to 600 V AC /DC, 1 x SPDT, 100-240 VAC

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K8DT0043B

K8DT-PM1CN

K8DTPM1CN

Three-phase Voltage Max / Min+Sequence+Per phase 200-240AC SPDT 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over/under voltage, phase sequence and loss, 3-phase 3-wire, 200 to 240 VAC, 1 x SPDT

Monitoring relay 17.5mm wide, over/under voltage, phase sequence and loss, 3-phase 3-wire, 200 to 240 VAC, 1 x SPDT

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K8DT0041F

K8DT-PH1CN

K8DTPH1CN

Three-phase sequence+Loss phase SPDT 200-480 VAC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, phase sequence and loss in 3 phase 3 wire, 200-480 VAC, 1 x SPDT

Monitoring relay 17.5mm wide, phase sequence and loss in 3 phase 3 wire, 200-480 VAC, 1 x SPDT

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K8DT0045R

K8DT-PM1TN

K8DTPM1TN

Three-phase Voltage Max / Min+Sequence+Per phase 200-240AC transistor 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over/under voltage, phase sequence and loss, 3-phase 3-wire, 200 to 240 VAC, 1 x Transistor

Monitoring relay 17.5mm wide, over/under voltage, phase sequence and loss, 3-phase 3-wire, 200 to 240 VAC, 1 x Transistor

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K8DT0044M

K8DT-PM2CN

K8DTPM2CN

Three-phase Voltage Max / Min+Sequence+Per phase, 380-480AC SPDT 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over/under voltage, phase sequence and loss, 3-phase 3-wire, 380 to 480 VAC, 1 x SPDT

Monitoring relay 17.5mm wide, over/under voltage, phase sequence and loss, 3-phase 3-wire, 380 to 480 VAC, 1 x SPDT

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K8DT0047E

K8DT-PZ1CN

K8DTPZ1CN

Three-phase Voltage Max / Min+Sequence+Per phase+asimetria 200-240AC SPDT 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over/under voltage, asymmetry, phase sequence and loss, 3-phase 3-wire, 200 to 240 VAC, 1 x SPDT

Monitoring relay 17.5mm wide, over/under voltage, asymmetry, phase sequence and loss, 3-phase 3-wire, 200 to 240 VAC, 1 x SPDT

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K8DT0036M

K8DT-VW3TA

K8DTVW3TA

Single-phase Voltage Max / Min 20-600VAC/DC 100-240VAC 1 transistor 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over and under voltage 20 to 600 V AC /DC, 1 x Transistor, 100-240 VAC

Monitoring relay 17.5mm wide, Single phase over and under voltage 20 to 600 V AC /DC, 1 x Transistor, 100-240 VAC

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K8DT0049A

K8DT-PZ1TN

K8DTPZ1TN

Three-phase Voltage Max / Min+Sequence+Per phase+asimetria 200-240AC transistor 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over/under voltage, asymmetry, phase sequence and loss, 3-phase 3-wire, 200 to 240 VAC, 1 x Transistor

Monitoring relay 17.5mm wide, over/under voltage, asymmetry, phase sequence and loss, 3-phase 3-wire, 200 to 240 VAC, 1 x Transistor

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K8DT0048C

K8DT-PZ2CN

K8DTPZ2CN

Three-phase Voltage Max / Min+Sequence+Per phase+asimetria 380-480AC SPDT 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over/under voltage, asymmetry, phase sequence and loss, 3-phase 3-wire, 380 to 480 VAC, 1 x SPDT

Monitoring relay 17.5mm wide, over/under voltage, asymmetry, phase sequence and loss, 3-phase 3-wire, 380 to 480 VAC, 1 x SPDT

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K8DT0001G

K8DT-AS1CA

K8DTAS1CA

Single phase Current Max or Min 2-500mA SPDT 100-240VAC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over or under current 2 to 500 mA AC /DC, 1 x SPDT, 100-240 VAC

Monitoring relay 17.5mm wide, Single phase over or under current 2 to 500 mA AC /DC, 1 x SPDT, 100-240 VAC

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K8DT0007F

K8DT-AS1CD

K8DTAS1CD

Single phase Current Max or Min 2-500mA SPDT 24V AC/DC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over or under current 2 to 500 mA AC /DC, 1 x SPDT, 24 V AC/DC

Monitoring relay 17.5mm wide, Single phase over or under current 2 to 500 mA AC /DC, 1 x SPDT, 24 V AC/DC

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K8DT0050E

K8DT-PZ2TN

K8DTPZ2TN

Three-phase Voltage Max / Min+Sequence+Per phase+asimetria 380-480AC transistor 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over/under voltage, asymmetry, phase sequence and loss, 3-phase 3-wire, 380 to 480 VAC, 1 x Transistor

Monitoring relay 17.5mm wide, over/under voltage, asymmetry, phase sequence and loss, 3-phase 3-wire, 380 to 480 VAC, 1 x Transistor

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K8DT0055F

K8DT-TH1CA

K8DTTH1CA

Relay monitoring Temperature-0-999ºC/F 100-240VAC SPDT 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over or under temperature, 0-999 °C/F Thermocouple and PT100 input types, 1 x SPDT, 100-240 VAC

Monitoring relay 17.5mm wide, over or under temperature, 0-999 °C/F Thermocouple and PT100 input types, 1 x SPDT, 100-240 VAC

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K8DT0051C

K8DT-LS1CA

K8DTLS1CA

Level relay 10K-100K SPDT 100-240VAC 17.5 mm Push-in+

Monitoring relay 17.5 mm wide, Conductive level control for liquid, 10k to 100k Ohm, 1 x SPDT, 100-240 VAC

Monitoring relay 17.5 mm wide, Conductive level control for liquid, 10k to 100k Ohm, 1 x SPDT, 100-240 VAC

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K8DT0010F

K8DT-AS1TD

K8DTAS1TD

Single phase Current Max or Min 2-500mA transistor 24V AC/DC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over or under current 2 to 500 mA AC/ DC, 1 x Transistor, 24 V AC/DC

Monitoring relay 17.5mm wide, Single phase over or under current 2 to 500 mA AC/ DC, 1 x Transistor, 24 V AC/DC

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K8DT0057B

K8DT-TH1TA

K8DTTH1TA

Relay monitoring Temperature-0-999ºC/F 100-240VAC transistor 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over or under temperature, 0-999 °C/F Thermocouple and PT100 input types, 1 x Transistor, 100-240 VAC

Monitoring relay 17.5mm wide, over or under temperature, 0-999 °C/F Thermocouple and PT100 input types, 1 x Transistor, 100-240 VAC

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K8DT0002E

K8DT-AS2CA

K8DTAS2CA

Single phase Current Max or Min 0.1-5 SPDT 100-240VAC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over or under current 0.1 to 5 A AC /DC, 1 x SPDT, 100-240 VAC

Monitoring relay 17.5mm wide, Single phase over or under current 0.1 to 5 A AC /DC, 1 x SPDT, 100-240 VAC

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K8DT0061M

K8DT-TH1TD

K8DTTH1TD

Relay monitoring Temperature-0-999ºC/F 24V AC/DC transistor 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over or under temperature, 0-999 °C/F Thermocouple and PT100 input types, 1 x Transistor, 24 V AC/DC

Monitoring relay 17.5mm wide, over or under temperature, 0-999 °C/F Thermocouple and PT100 input types, 1 x Transistor, 24 V AC/DC

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K8DT0008D

K8DT-AS2CD

K8DTAS2CD

Single phase Current Max or Min 0.1-5 SPDT 24V AC/DC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over or under current 0.1 to 5 A AC /DC, 1 x SPDT, 24 V AC/DC

Monitoring relay 17.5mm wide, Single phase over or under current 0.1 to 5 A AC /DC, 1 x SPDT, 24 V AC/DC

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K8DT0056D

K8DT-TH2CA

K8DTTH2CA

Relay monitoring Temperature 0-1700 degrees celsius/F 100-240VAC SPDT 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over or under temperature, 0 to 1700 °C/F(minimum setting 10 °C), Thermocouple input type, 1 x SPDT, 100-240 VAC

Monitoring relay 17.5mm wide, over or under temperature, 0 to 1700 °C/F(minimum setting 10 °C), Thermocouple input type, 1 x SPDT, 100-240 VAC

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K8DT0060B

K8DT-TH2CD

K8DTTH2CD

Relay monitoring Temperature 0-1700 degrees celsius/F 24V AC/DC SPDT 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over or under temperature, 0 to 1700 °C/F(minimum setting 10 °C), Thermocouple input type, 1 x SPDT, 24 V AC/DC

Monitoring relay 17.5mm wide, over or under temperature, 0 to 1700 °C/F(minimum setting 10 °C), Thermocouple input type, 1 x SPDT, 24 V AC/DC

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K8DT0053M

K8DT-LS1CD

K8DTLS1CD

Level relay 10K-100K SPDT 24V AC/DC 17.5 mm Push-in+

Monitoring relay 17.5 mm wide, Conductive level control for liquid, 10k to 100k Ohm, 1 x SPDT, 24 V AC/DC

Monitoring relay 17.5 mm wide, Conductive level control for liquid, 10k to 100k Ohm, 1 x SPDT, 24 V AC/DC

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K8DT0003C

K8DT-AS3CA

K8DTAS3CA

Single phase Current Max or Min 10-200 TO SPDT 100-240VAC 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over or under current 10 to 200 A AC /DC, 1 x SPDT, 100-240 VAC

Monitoring relay 17.5mm wide, Single phase over or under current 10 to 200 A AC /DC, 1 x SPDT, 100-240 VAC

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K8DT0062R

K8DT-TH2TD

K8DTTH2TD

Relay monitoring Temperature 0-1700 degrees celsius/F 24V AC/DC transistor 17.5 mm Push-in+

Monitoring relay 17.5mm wide, over or under temperature, 0 to 1700 °C/F(minimum setting 10 °C), Thermocouple input type, 1 x Transistor, 24 V AC/DC

Monitoring relay 17.5mm wide, over or under temperature, 0 to 1700 °C/F(minimum setting 10 °C), Thermocouple input type, 1 x Transistor, 24 V AC/DC

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K8DT0052A

K8DT-LS1TA

K8DTLS1TA

Level relay 10K-100K transistor 100-240VAC 17.5 mm Push-in+

Monitoring relay 17.5 mm wide, Conductive level control for liquid, 10k to 100k Ohm, 1 x Transistor, 100-240 VAC

Monitoring relay 17.5 mm wide, Conductive level control for liquid, 10k to 100k Ohm, 1 x Transistor, 100-240 VAC

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K8DT0037H

K8DT-VW2CD

K8DTVW2CD

Single-phase Voltage Max and Min 1-150VAC/DC 24V AC/DC 1 SPDT 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over and under voltage 1 to 150 V AC /DC, 1 x SPDT, 24 V AC/DC

Monitoring relay 17.5mm wide, Single phase over and under voltage 1 to 150 V AC /DC, 1 x SPDT, 24 V AC/DC

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