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OMRON K8DT-PH1TN | Phase-Sequence & Phase-Loss Monitoring Relay
- 17.5 mm-wide DIN-rail monitoring relay (3-phase, 3-wire)
- Detects phase sequence and phase loss
- Supply 200-480 VAC
- Transistor open-collector output
- Push-in terminals for efficient wiring
Datasheet: 
K8DT-PH1TN
Original price was: Rs 25,000.Rs 12,500Current price is: Rs 12,500.
K8DT-PH1TN is a 17.5 mm-wide DIN-rail monitoring relay from OMRON’s K8DT-PH series, designed to detect both phase sequence and phase loss in three-phase, three-wire systems across a wide supply range of 200–480 VAC. With a response time of 0.1 s (±0.05 s) and automatic reset, the device supports applications where immediate fault-detection is critical for motor protection.
Features
- Slim 17.5 mm width for space-efficient panel layouts
- Wide input voltage: 3-phase, 3-wire 200–480 VAC supply range
- Phase loss detection even while the motor is operating
- Transistor (open-collector) output version for enhanced reliability
- High immunity to inverter-noise environments (1,500 V common/normal mode noise immunity)
- Overload withstand up to 528 V continuously; dielectric 2,000 VAC between external terminals and case
- Compliance with EN 60947-5-1, UL 60947-5-1, CCC, LR marine standards
Technical Specifications
| Model | K8DT-PH1TN |
| Sensing function | Phase sequence & phase loss (3-wire, 3-phase) |
| Supply voltage | 200–480 VAC, 45–65 Hz |
| Response time | Phase sequence: 0.1 s ± 0.05 s Phase loss: 0.1 s max |
| Output type | Transistor (open-collector) |
| Terminal type | Push-in Plus or screw-clamp, compatible with ferrules/solid wire |
| Width / Depth / Height | 17.5 mm × 90 mm × 90 mm |
| Contact rating | 5 A at 250 VAC / 5 A at 30 VDC (resistive) / 3 A at 250 VAC/30 VDC (inductive) |
| Dielectric strength | 2,000 VAC for 1 min between terminals & case |
| Impulse withstand voltage | 6 kV between live terminals & exposed non-charged metal parts |
| Noise immunity | 1,500 V (power supply terminal common/normal mode) |
| Operating temperature | −20 to 60 °C (no condensation or icing) |
| Altitude | 2,000 m max. |
| Degree of protection (terminals) | IP20 |
| Applicable wire size | 0.25–1.5 mm² (AWG24–16), insertion force ≤ 8 N |
For more information, visit the OEM page for K8DT-PH series.
Brand
OMRON
OMRON, based in Japan, stands at the forefront of innovation in the electrical and automation industry. Renowned for its extensive range of products, Omron specializes in manufacturing sensors, relays, controllers, and automation systems.
Choose Omron for state-of-the-art solutions that bring precision and reliability to your electrical applications.
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