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11. OPTIONS AND PERIPHERAL EQUIPMENT
11 - 87
(f) 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
supply
voltage
Varistor
Maximum rating
Maximum
limit
voltage
Static
capacity
(reference
value)
Varistor voltage rating
(range)
V1 mA
Permissible circuit
voltage
Surge
current
immunity
Energy
immunity
Rated pulse
power
[A] [V]
AC [Vrms] DC [V] 8/20 µs [A] 2 ms [J] [W] [pF] [V]
200 V
class/
100 V
class
TND20V-431K 275 350
10000/1
times
195
1.0 100
710 1300 430 (387 to 473)
TND20V-471K 300 385
7000/2
times
215 775 1200 470 (423 to 517)
400 V
class
TND20V-102K 625 825
7500/1
time
6500/2
times
400 1.0 100 1650 560 1000 (900 to 1100)
[Unit: mm]
WE
H
D
L
T
φd
Model
D
Max.
H
Max.
T
Max.
E
±1.0
(Note)
L
min.
φd
±0.05
W
±1.0
TND20V-431K
21.5 24.5
6.4 3.3
20 0.8 10.0
TND20V-471K 6.6 3.5
TND20V-102K 22.5 25.5 9.5 6.4 20 0.8 10.0
Note. For special purpose items for lead length (L), contact the manufacturer.