11. OPTIONS AND AUXILIARY EQUIPMENT 
 
11 -  6 
 
11.2 Regenerative options 
 
CAUTION 
Do not use servo amplifiers with regenerative options other than the combinations 
specified below. 
Otherwise, it may cause a fire. 
 
 
11.2.1 Combination and regenerative power 
The power values in the table are resistor-generated powers and not rated powers. 
 
(1)  200 V class 
 
      Regenerative Power [W]       
Servo 
amplifier 
Built-in 
regenerative 
resistor 
MR-RB032 
[40 Ω] 
MR-RB12 
[40 Ω] 
MR-RB30
[13 Ω] 
MR-RB3N
[9 Ω] 
MR-RB31
[6.7 Ω] 
MR-RB32
[40 Ω] 
(Note 1) 
MR-RB50 
[13 Ω] 
(Note 1) 
MR-RB5N
[9 Ω] 
(Note 1) 
MR-RB51
[6.7 Ω] 
MR-J4-10A 
(-RJ) 
 30      
MR-J4-20A 
(-RJ) 
10 30 100    
MR-J4-40A 
(-RJ) 
10 30 100    
MR-J4-60A 
(-RJ) 
10 30 100    
MR-J4-70A 
(-RJ) 
20 30 100       300      
MR-J4-100A 
(-RJ) 
20 30 100       300      
MR-J4-200A 
(-RJ) 
100     300      500    
MR-J4-350A 
(-RJ) 
100      300  500  
MR-J4-500A 
(-RJ) 
130       300  500 
MR-J4-700A 
(-RJ) 
170       300  500 
 
(Note 2) Regenerative power [W] 
Servo 
amplifier 
External regenerative 
resistor (accessory) 
MR-RB5R 
[3.2 Ω] 
MR-RB9F
[3 Ω] 
MR-RB9T
[2.5 Ω] 
MR-J4-11KA 
(-RJ) 
500 (800)  500 (800)     
MR-J4-15KA 
(-RJ) 
850 (1300)    850 (1300)  
MR-J4-22KA 
(-RJ) 
850 (1300)      850 (1300)
 
Note   1.  Always install a cooling fan. 
    2.  Values in parentheses assume the installation of a cooling fan.