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Phase-sequence Phase-loss Relay


Our Value Design Products Increase the Value of Your Control Panels. Protect motors and other equipment from unstable voltages in the power supply system. Protect motors and other equipment by detecting phase sequence and phase loss for three-phase power supplies.


Rated input voltage 3-phase, 200 to 480 VAC (3-wire)
Input load Approx. 2.6 VA
Rated insulation
528 VAC
0.1 s±0.05 s
Phase loss 0.1 s max.
(when the voltage changes rapidly from 100% to 0% of rated voltage)
Reset method Automatic reset
Indicators Power (PWR): Green,
Output (OUT): Yellow
Output form Relay Output: SPDT contact
Transistor Output: 1
Output relay ratings Rated load
5 A at 250 VAC (Resistive load)
5 A at 30 VDC (Resistive load)
1 A at 250 VAC (Inductive load)
0.2 A at 48 VDC (Inductive load)
Minimum load: 5 VDC, 10 mA (reference values)
Mechanical life: 10 million operations min.
Electrical life: 5 A at 250 VAC or 30 VDC:
50,000 operations
3 A at 250 VAC or 30 VDC:
100,000 operations
Transistor output
Rated voltage: 24 VDC (maximum voltage: 26.4 VDC)
Maximum current: 50 mA DC
Ambient operating
-20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating
25% to 85% RH (with no condensation)
Storage humidity 25% to 85% RH (with no condensation)
Altitude 2,000 m max.
Applicable wires Stranded wires, solid wires, or ferrules
Applicable wire size 0.25 to 1.5 mm2 (AWG24 to AWG16)
Wire insertion force 8 N max. for AWG20 wire
insertion force
15 N max.
Wire stripping length 8 mm
Ferrule length 8 mm
Recommended flatblade
XW4Z-00B (Omron)
SZF 0.4 × 2.5 (Phoenix Contact)
210-719 (Wago)
SDI 0.4 × 2.5 × 75 (Weidmuller)
Current capacity 10 A (per pole)
Number of
50 times
Case color N1.5
Case material PC, UL 94 V-0
Weight Approx. 100 g
Mounting Mounts to DIN Track, or screw mounting
Dimensions 17.5 × 90 × 90 mm (W×D×H)


Input frequency
45 to 65 Hz
Overload capacity Continuous 528 V
Phase loss detection
80%±10% of rated input Calculation Formula
= 1 - ((Highest phase-to-phase voltage - Lowest phase-to-phase voltage)/
Average three-phase phase-to-phase voltage)
EN 60947-5-1
Installation environment (pollution level 2, Overvoltage category III)
EMC EN 60947-5-1
UL 60947-5-1 (Listing), Korean Radio Waves Act (Act 10564),
CCC (GB/T 14048.5), LR (Category ENV1.2)
Insulation resistance 20 MΩ min.
Between external terminals and case
Between input terminals and output terminals
Dielectric strength 2,000 VAC for one minute
Between external terminals and case
Between input terminals and output terminals
Impulse withstand
6 kV (between live terminals and exposed, non-charged metal parts)
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of 1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, 0.35-mm single amplitude
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 100 m/s2, 3 times each in 6 directions along 3 axes
Degree of protection Terminals: IP20