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MDS-D-SVJ3/SPJ3 Series Specifications Manual
6-2 Selection of circuit protector and contactor
6-2-2 Selection of contactor
Select the contactor selection current that is calculated from the rated output and the nominal input voltage of the
drive unit as in the expression below. And then select the contactor whose conventional free-air thermal current
meets the contactor selection current.
Contactor selection current [A]=
(Contactor selection current for 200V input [A] / Nominal input voltage [V]) × 200 [V]
Selection of contactor for 200V input
Option part: A contactor is not prepared as an NC unit accessory, so purchase the part from your dealer, etc.
Unit type
MDS-D-SVJ3-
03NA 04NA 07NA 10NA 20NA 35NA
Rated output 0.3kW 0.4kW 0.75kW 1.0kW 2.0kW 3.5kW
Contactor selection
current for 200V input
2.5A 5A 7A 8A 10A 15A
Selection example of contactor
(Mitsubishi Electric Corp.)
S-N12
-AC200V
S-N12
-AC200V
S-N12
-AC200V
S-N12
-AC200V
S-N18
-AC200V
S-N20
-AC200V
Conventional freeair thermal
current of the selection example of
contactor
20A 20A 20A 20A 25A 32A
Unit type
MDS-D-SPJ3-
075NA 22NA 37NA 55NA 75NA 110NA
Rated output 0.75kW 2.2kW 3.7kW 5.5kW 7.5kW 11kW
Contactor selection
current for 200V input
6A 9A 15A 23A 31A 45A
Selection example of contactor
(Mitsubishi Electric Corp.)
S-N12-
AC200V
S-N18-
AC200V
S-N20-
AC200V
S-N25-
AC200V
S-N25-
AC200V
S-N35-
AC200V
Conventional freeair thermal
current of the selection example of
contactor
20A 25A 32A 50A 50A 60A
1. Use an alternating contactor.
2. Select a contactor whose excitation coil does not operate at 15mA or less.
POINT