Date:
2/18/2008
VARISTOR
SPECIFICATION SHEET
D7777ZOV181RA630
MAIDA STYLE NUMBER
HIGH ENERGY SERIES
Electrical Specifications
Continuous AC Voltage
Continuous DC Voltage
Maximum DC Leakage @ Rated VDC
Low Varistor Voltage Limit
High Varistor Voltage Limit
Nominal Varistor Voltage
Current for Varistor Voltage
Maximum Clamp Voltage
Maximum Clamp Voltage Test Current
Peak Current Rating (1 Pulse)
Peak Current Rating (2 Pulse)
Energy Rating (8X20us)
Energy Rating (10X1000us)
Typical Capacitance
Impulse Response Time
Minimum Hipot of Coating
Minimum I.R. of Coating
Physical Specifications
180
VAC
230
VDC
200
uA
Lead Style
Z Nominal
Z Tolerance
Lead Length Nominal
Lead Length Tolerance
Y Nominal
Y Tolerance
d Nominal
Wire Gauge
Minimum Marking
Nominal Disk Size
D Maximum
T Maximum
H Maximum
156
1
in.
0.02
in.
in.
in.
255
VDC
311
VDC
283
VDC
0.371
in.
0.04
in.
1
mA
465
V
500
A
0.02
in.
24
AWG
Z181-630UL
70000
A
A
J
53
mm
2.4
in.
0.267
in.
630
J
10000
pF
<
2.675
in.
50
ns
2500
VDC
1000
ΜΩ
D MAX.
T MAX.
Thermal Specifications
Minimum Operating Temperature
Maximum Operating Temperature
Varistor Voltage Temperature Coeff
Minimum Storage Temperature
Maximum Storage Temperature
Current/Energy Derating Above 85°C
H MAX.
-40
°C
C TYP.
L TYP.
Z NOM.
W NOM.
85
°C
-0.05
%/°C
-50
°C
125
°C
Y NOM.
-2.5
%/°C
* Contact Maida for a more detailed configuration drawing.
Safety Agency Recognitions
UL 1449 File Number
UL 1414 File Number
DEVELOPMENT COMPANY
20 Libby Street
P.O. Box 3529
Hampton, Virginia 23663
(757) 723-0785
Fax (757) 722-1194
E86730
E38785
UL 497B File Number
CSA File Number
VDE File Number
SEV File Number
LR33468