applications requiring high peak surge current ratings and
high energy absorption capability. UltraMOV™ varistors are
primarily intended for use in AC Line Voltage applications
such as Surge Protective Devices (SPD), Uninterruptable
Power Supplies (UPS), AC Power Taps, AC Power Meters,
or other products that require voltage clamping of high
transient surge currents from sources such as lightning,
inductive load switching, or capacitor bank switching.
These devices have 25mm square forms are produced
in a radial lead package and offered with straight leads.
UltraMOV
®
25S varistors are manufactured with
recognized epoxy encapsulation and are rated for ambient
temperatures up to 85°C with no derating. This 25S Series
is LASER-branded and is supplied in bulk packaging.
Features
• Lead–free and
RoHS compliant.
• High peak surge
current rating (I
TM
)
22kA, single 8/20µs
pulse, (25mm)
Samples
Agency Approvals
Agency
Agency Approval
Agency File Number
UL1449
22.2-1
IEC 61051-1, IEC61051-2,
IEC 60950-1 (Annex Q)
E320116
091788
116895
• Custom voltage
types available
• Standard lead form
and lead space options
Additional Information
Datasheet
Resources
• Standard operating
voltage range
compatible with
common AC line
voltages (115 to
750VAC)
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
)
DC Voltage Range (V
M(DC)
)
Transients:
Peak Pulse Current (I
TM
) 8x20µs Current Wave Single Pulse
Single-Pulse Energy Capability (W
TM
) 2ms Current Wave
Operating Ambient Temperature Range (T
A
)
Storage Temperature Range (T
STG
)
Temperature Coefficient (a ) of Clamping Voltage (V
C
) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
Dielectic Withstand DC for 1 min per MIL–STD–202, Method 301
Insulation Resistance of the Epoxy Coating
V
UltraMOV
®
25S Varistor Series
115 to 750
150 to 970
22,000
230 to 890
-55 to +85
-55 to +125
<0.01
2500
1000
Units
V
V
A
J
ºC
ºC
%/C
V
MΩ
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any
other conditions above those indicated in the operational sections of this specification is not implied.
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