Date:
2/19/2008
MAIDA STYLE NUMBER
VARISTOR
SPECIFICATION SHEET
8S17SM251
SMT 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 Voltage1
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
250
VAC
330
VDC
Length
Length Tolerance
Width
Width Tolerance
Max. Height
Termination Spacing
Termination Tolerance ±
Pad Length
Pad Width
Pad Thickness
±
±
0.32
0.012
in.
in.
in.
in.
in.
in.
200
uA
354
VDC
429
VDC
390
VDC
0.2
0.012
0.064
1
mA
650
V
10
A
0.03
500
A
0
A
0
J
0.02
in.
in.
in.
in.
21
J
78
pF
50
ns
0
VDC
0
ΜΩ
H
W
T
L
Thermal Specifications
Minimum Operating Temperature
Maximum Operating Temperature
Varistor Voltage Temperature Coeff
Minimum Storage Temperature
Maximum Storage Temperature
Current/Energy Derating Above 85°C
-40
°C
85
°C
Land Pad Layout
PL
-0.05
%/°C
-50
°C
PW
125
°C
-2.5
%/°C
PT
* 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
UL 497B File Number
CSA File Number
VDE File Number
SEV File Number
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