Mitsubishi Electric Melservo MR-J3-100B, Handbook

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Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_
5 - 56
(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.
(a) Converter unit
Converter unit
Molded-case circuit breaker (Note) Fuse (Class T) Fuse (Class K5)
Frame, rated current Voltage AC [V]
Current [A] Voltage AC [V] Current [A] Voltage AC [V]
MR-CR55K 30 A frame 5 A 240 1 300 1 250
MR-CR55K4 30 A frame 5 A 480 1 600 1 600
Note. When having the converter unit comply with the IEC/EN/UL/CSA standard, refer to "MR-CV_/MR-CR55K_/MR-J4-DU_(-
RJ) instruction manual".
(b) Drive unit
Drive unit
Molded-case circuit breaker (Note) Fuse (Class T) Fuse (Class K5)
Frame, rated current Voltage AC [V] Current [A] Voltage AC [V] Current [A] Voltage AC [V]
MR-J4-DU30K_
30 A frame 5 A 240 1 300 1 250
MR-J4-DU37K_
MR-J4-DU30K_4
30 A frame 5 A 480 1 600 1 600
MR-J4-DU37K_4
MR-J4-DU45K_4
MR-J4-DU55K_4
Note. When having the drive unit comply with the IEC/EN/UL/CSA standard, refer to "MR-CV_/MR-CR55K_/MR-J4-DU_(-RJ)
instruction manual".