Mitsubishi Electric MELSERVO-J3 Series Handbook page 514

Part 8: Review on Replacement of Optional Peripheral Equipment
(2) For control circuit power supply
When the wiring for the control circuit power supply (L11, L21) is thinner than that for the main circuit
power supply (L1, L2, L3), install an overcurrent protection device (molded-case circuit breaker or fuse)
to protect the branch circuit.
Molded-case circuit breaker (Note)
Servo amplifier
Frame, rated current
MR-J4-10_
MR-J4-20_
MR-J4-40_
MR-J4-60_
MR-J4-70_
MR-J4-100_
MR-J4-200_ 30 A frame 5 A
MR-J4-350_
MR-J4-500_
MR-J4-700_
MR-J4-11K_
MR-J4-15K_
MR-J4-22K_
MR-J4-60_4
MR-J4-100_4
MR-J4-200_4
MR-J4-350_4
MR-J4-500_4 30 A frame 5 A
MR-J4-700_4
MR-J4-11K_4
MR-J4-15K_4
MR-J4-22K_4
MR-J4-10_1
MR-J4-20_1 30 A frame 5 A
MR-J4-40_1
Note. In order for the servo amplifier to comply with the UL/CSA standard, refer to the Servo Amplifier Instruction Manual.
Molded-case circuit breaker, fuse
Fuse (Class T)
Voltage AC [V] Current [A]
240 1
480 1
240 1
8 - 29
Fuse (Class K5)
Voltage AC [V] Current [A]
300 1
600 1
300 1
Voltage AC [V]
250
600
250