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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

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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K8DT0031R

K8DT-VS2TD

K8DTVS2TD

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

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

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

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K8DT0035A

K8DT-VW2TA

K8DTVW2TA

Single-phase Voltage Max and Min 1-150VAC/DC 100-240VAC 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, 100-240 VAC

Monitoring relay 17.5mm wide, Single phase over and under voltage 1 to 150 V AC /DC, 1 x Transistor, 100-240 VAC

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K8DT0032G

K8DT-VS3TD

K8DTVS3TD

Single-phase Voltage Max or Min 20-600VAC/DC 24V AC/DC 1 transistor 17.5 mm Push-in+

Monitoring relay 17.5mm wide, Single phase over or under voltage 20 to 600 V AC /DC, 1 x Transistor, 24 V AC/DC

Monitoring relay 17.5mm wide, Single phase over or under voltage 20 to 600 V AC /DC, 1 x Transistor, 24 V AC/DC

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K8DT0033E

K8DT-VW2CA

K8DTVW2CA

Single-phase Voltage Max and Min 1-150VAC/DC 100-240VAC 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, 100-240 VAC

Monitoring relay 17.5mm wide, Single phase over and under voltage 1 to 150 V AC /DC, 1 x SPDT, 100-240 VAC

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K8DT0028R

K8DT-VS3TA

K8DTVS3TA

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

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

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

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K8DT0054H

K8DT-LS1TD

K8DTLS1TD

Level relay 10K-100K transistor 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 Transistor, 24 V AC/DC

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

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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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K8DT0020C

K8DT-AW2CD

K8DTAW2CD

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

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

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

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K8DT0022M

K8DT-AW1TD

K8DTAW1TD

Single-phase Current, Max, and Min 2-500mA transistor 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, 2 x Transistor, 24 V AC/DC

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

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K8DT0040H

K8DT-VW3TD

K8DTVW3TD

Single-phase Voltage Max / Min 20-600VAC/DC 24V AC/DC 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, 24 V AC/DC

Monitoring relay 17.5mm wide, Single phase over and under voltage 20 to 600 V AC /DC, 1 x Transistor, 24 V AC/DC

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K8DT0006H

K8DT-AS3TA

K8DTAS3TA

Single phase Current Max or Min 10-200 To transistor 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 Transistor, 100-240 VAC

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

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K8DT0042D

K8DT-PH1TN

K8DTPH1TN

Three-phase sequence+Loss phase transistor 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 Transistor

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

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K8DT0018A

K8DT-AW3TA

K8DTAW3TA

Single phase Current Max and Min 10-200 To transistor 100-240VAC 17.5 mm Push-in+

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

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

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K8DT0015G

K8DT-AW3CA

K8DTAW3CA

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

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

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

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K8DT0026B

K8DT-VS3CA

K8DTVS3CA

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

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

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

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K8DT0017C

K8DT-AW2TA

K8DTAW2TA

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

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

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

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K8DT0029G

K8DT-VS2CD

K8DTVS2CD

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

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

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

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K8DT0021A

K8DT-AW3CD

K8DTAW3CD

Single phase Current Max and Min 10-200 TO SPDT 24V AC/DC 17.5 mm Push-in+

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

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

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K8DT0009B

K8DT-AS3CD

K8DTAS3CD

Single phase Current Max or Min 10-200 TO SPDT 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 SPDT, 24 V AC/DC

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

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K8DT0014R

K8DT-AW2CA

K8DTAW2CA

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

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

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

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K8DT0013M

K8DT-AW1CA

K8DTAW1CA

Single-phase Current, Max, and Min 2-500mA SPDT 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 SPDT, 100-240 VAC

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

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