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J7TC Series

Thermal overload relay

J7TC Series

Motor Protection from Overload and Phase -loss by Combination with J7KC for up to 2.2 kW (240 VAC) *, 5.5 kW (440 VAC) * Based on JIS C 8201-4-1

Ratings/Specifications

Main
circuit
rating
Trip class 10 A
3-pole load operation
(At 20°C ambient
temperature)
IEC 60947-4-1/
JIS C 8201-4-1
Limit
operation
No operation (cold start) 105% (less than 2 hours) *1
Operation (hot start) 120% (less than 2 hours) *1
Operation when overload occurs
(hot start)
150% (less than 2 minutes) *1
Operation when locking occurs
(cold start)
720% (over 2 s up to 10 s) *1
2-pole load operation
(At 20°C ambient
temperature)
IEC 60947-4-1/
JIS C 8201-4-1
Phase less protection device With phase failure protection device
No operation (cold start) 2 poles 100%/1 pole 90% *1
Operation (hot start) 2 poles 115%/1 pole 0% (less than 2 hours) *1
Ambient temperature
compensation
performance
Ambient
temperature
40°C
No operation (cold start) 100% (less than 2 hours) *1
Operation (hot start) 120% (less than 2 hours) *1
Ambient
temperature
-5°C
No operation (cold start) 105% (less than 2 hours) *1
Operation (hot start) 130% (less than 2 hours) *1
Auxiliary
circuit
rating
Ratings based
on IEC 60947-5-1
Rated voltage range (V) 24 100-120 200-240 380-440 500-600
Rated
operational
current (A)
AC-15
(Coil load)
NC contact 3.0 (0.5) *2 2.5 (0.5) *2 2.0 (0.5) *2 1.0 (0.5) *2 0.6 (0.5) *2
NO contact 3.0 (0.5) *2 2.5 (0.5) *2 1.5 (0.5) *2 0.75 (0.5) *2 0.6 (0.5) *2
DC-13
(Coil load)
NC contact 1.1 (0.3) *2 0.28 0.14 --- ---
NO contact 1.1 (0.3) *2 0.28 0.14 --- ---
Conventional free air thermal current
(Rated carry current)
5 A
Ratings based
on UL 508
Rated carry current (A) 5 1
Rated voltage (V) 120 AC 240 AC 480 AC 600 AC 125 DC 250 DC
Contact closed current (A) 30 15 7.5 6 0.22 0.11
Breaking current (A) 3 1.5 0.75 0.6 0.22 0.11
Rating code B600 Q300
Minimum operate voltage/current (reference value) 5 VDC, 3 mA
Contact resistance (reference value) 50 mΩ max. (6 VDC, 1 A, voltage drop method)
Contact structure Single-break
Contact material Ag alloy
Rated insulation voltage 690VAC
Rated impulse dielectric strength 6 kV
Rated frequency 50/60 Hz
Vibration resistance Vibration: 10 to 55 Hz, acceleration: 15m/s2
Shock resistance Shock value 50 m/s2
Degree of protection IP20 (IEC60529)
Operating temperature -10 to +55°C (however, daily average shall not exceed 35°C)
Ambient storage temperature -40 to +65°C (no condensation or icing)
Relative humidity 45% to 85% RH (no condensation or icing)
Altitude 2000 m max.
Weight 110 g
Applicable standards Safety standard EN 60947-4-1 (IEC 60947-4-1), UL 60947-4-1, CSA 22.2 No.60947-4-1, CCC GB/T 14048.4

*1. Ratio to dial settling current
*2. () indicates the contact rating when set to auto release