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12. CHARACTERISTICS
12.2 Power supply equipment capacity and generated loss
(1) Amount of heat generated by the servo amplifier
Table 12.1 indicates servo amplifiers' power supply capacities and losses generated under rated load.
For thermal design of an enclosure, use the values in Table 12.1 in consideration for the worst
operating conditions. The actual amount of generated heat will be intermediate between values at
rated torque and zero torque according to the duty used during operation. When the servo motor is run
at less than the maximum speed, the power supply capacity will be smaller than the value in the
table, but the servo amplifier's generated heat will not change.
Table 12.1 Power supply capacity and generated heat per servo amplifier at rated output
(Note 2)
Servo amplifier-generated heat[W]
Area required for heat dissipation
Servo amplifier Servo motor
(Note 1)
Power supply
capacity[kVA]
At rated torque With servo off [m
2
] [ft
2
]
HC-KFS053 13 0.3 25 15 0.5 5.4
HC-MFS053 13 0.3 25 15 0.5 5.4
MR-J2S-10A(1)
HC-UFS13 0.3 25 15 0.5 5.4
HC-KFS23 0.5 25 15 0.5 5.4
HC-MFS23 0.5 25 15 0.5 5.4MR-J2S-20A(1)
HC-UFS23 0.5 25 15 0.5 5.4
HC-KFS43 0.9 35 15 0.7 7.5
HC-MFS43 0.9 35 15 0.7 7.5MR-J2S-40A(1)
HC-UFS43 0.9 35 15 0.7 7.5
HC-SFS52 1.0 40 15 0.8 8.6
MR-J2S-60A
HC-SFS53 1.0 40 15 0.8 8.6
HC-KFS73 1.3 50 15 1.0 10.8
HC-MFS73 1.3 50 15 1.0 10.8MR-J2S-70A
HC-UFS72
73 1.3 50 15 1.0 10.8
HC-SFS81 1.5 50 15 1.0 10.8
MR-J2S-100A
HC-SFS102
103 1.7 50 15 1.0 10.8
HC-SFS121 2.1 90 20 1.8 19.4
HC-SFS201 3.5 90 20 1.8 19.4
HC-SFS152 153 2.5 90 20 1.8 19.4
HC-SFS202 203 3.5 90 20 1.8 19.4
HC-RFS103 1.7 50 15 1.0 10.8
HC-RFS153 2.5 90 20 1.8 19.4
MR-J2S-200A
HC-UFS152 2.5 90 20 1.8 19.4
HC-SFS301 4.8 120 20 2.7 29.1
HC-SFS352 353 5.5 130 20 2.7 29.1
HC-RFS203 3.5 90 20 1.8 19.4
MR-J2S-350A
HC-UFS202 3.5 90 20 1.8 19.4
HC-SFS502 7.5 195 25 3.9 42.0
HC-RFS353 5.5 135 25 2.7 29.1
HC-RFS503 7.5 195 25 3.9 42.0
HC-UFS352 5.5 195 25 3.9 42.0
MR-J2S-500A
HC-UFS502 7.5 195 25 3.9 42.0
MR-J2S-700A HC-SFS702 10.0 300 25 6.0 64.6
Note:1. Note that the power supply capacity will vary according to the power supply impedance.
2. Heat generated during regeneration is not included in the servo amplifier-generated heat. To calculate heat generated by
the regenerative brake option, use Equation 13.1 in Section 13.1.1.