Littelfuse UltraMOV 25S Varistor Series - Manual

© 2013 Littelfuse, Inc. 107
Revised: May 8, 2013
Varistor Products
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
UltraMOV™ 25S Varistor Series
Radial Lead Varistors > UltraMOV TM 25S Series
UltraMOV
™
25S
Series
RoHS
Description
Features
• Lead–free and
RoHS compliant.
• High peak surge
current rating (I
TM
)
22kA, single 8/20μs
pulse, (25mm)
• 40kA rating when 2
devices paralleled
(VN(DC) matched
within +/- 5%,
contact factory for
special selections
• Standard operating
voltage range
compatible with
common AC line
voltages (115 to
750VAC)
• Characterized for
maximum standby
current (Leakage)
• Custom voltage
types available
• Standard lead form
and lead space options
Agency Approvals
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Agency Agency FIle Number Status
E320116 Approved
091788 Approved
Continuous UltraMOV TM 25S Series Units
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
) 115 to 750 V
DC Voltage Range (V
M(DC)
) 150 to 970 V
Transients:
Peak Pulse Current (I
TM
) 8x20μs Current Wave Single Pulse 22,000 A
Single-Pulse Energy Capability (W
TM
) 2ms Current Wave 230 to 890 J
Operating Ambient Temperature Range (T
A
) -55 to +85 ºC
Storage Temperature Range (T
STG
) -55 to +125 ºC
Temperature Coefficient (a V ) of Clamping Voltage (V
C
) at Specified Test Current <0.01 %/C
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
Dielectic Withstand DC for 1 min per MIL–STD–202, Method 301
2500 V
Insulation Resistance of the Epoxy Coating 1000 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.
The UltraMOV TM 25S Varistor Series is designed for
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.
UltraMOVs 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.
UltraMOV TM 25S Varistor Series