Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 426

■Varistor for input power supply (recommended)
Varistors are effective to prevent exogenous noise and lightning surge from entering the servo amplifier. When using a
varistor, connect it between each phase of the input power supply of the equipment. For varistors, the TND20V-431K,
TND20V-471K and TND20V-102K, manufactured by Nippon Chemi-Con, are recommended. For detailed specification and
usage of the varistors, refer to the manufacturer catalog.
Power Varistor
supply
voltage
100 V TND20V-431K
class/200
TND20V-471K
V class
400 V TND20V-102K
class
T
D
W E
d
[Unit: mm]
Model D Max.
TND20V-431K 21.5
TND20V-471K
TND20V-102K 22.5
*1 For special purpose items for lead length (L), contact the manufacturer.
11 OPTIONS AND PERIPHERAL EQUIPMENT
424
11.14 Noise reduction techniques
Maximum rating
Permissible Surge
circuit voltage current
immunity
DC [V] 8/20 s [A] 2 ms [J]
AC
[Vrms]
275 350 10000/1
time
300 385
7000/2
times
625 825 7500/1 time
6500/2
times
H Max. T Max.
24.5 6.4
6.6
25.5 9.5
Maximum
limit voltage
Energy Rated [A]
immunity pulse
power
[W]
195 1.0 100
215
400 1.0 100
E  1.0
L Min.
3.3 20
3.5
6.4 20
Static Varistor voltage
capacity rating (range) V1
(reference mA
[V]
value)
[pF] [V]
710 1300 430 (387 to 473)
775 1200 470 (423 to 517)
1650 560 1000 (900 to 1100)
*1
d  0.05 W  1.0
0.8 10.0
0.8 10.0