87
Varistor Products
©2009 Littelfuse, Inc.
Revision: November 5, 2009
87
Revision: November 5, 2009
©2008 Littelfuse, Inc.
UltraMOVTM Varistor Series
Radial Lead Varistors > UltraMOV
TM
Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
TMO
V
®
/
iTMO
V
®
SERIES
UL
TRAMO
V
TM
S
eries
RoHS
Description
The UltraMOVTM Metal Oxide Varistor Series is designed
for applications requiring high peak surge current ratings
and high energy absorption capability. UltraMOVTM
varistors are primarily intended for use in AC Line Voltage
applications such as Transient Voltage Surge Suppressors
(TVSS), 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 are produced in radial lead package sizes of
7, 10,14 and 20mm and offered in a variety of lead forms.
UltraMOVsTM are manufactured with recognized epoxy
encapsulation and are rated for ambient temperatures up
to 85ºC with no derating. This Series is LASER-branded and
is supplied in bulk, ammo pack (fan-fold), or tape and reel
packaging.
Features
· Leadfree and RoHS
compliant option available.
Please see the device
and ratings specifications
table for more information
· High peak surge
current rating (I
TM
) up
to 10kA, single 8 x
20 pulse, (20mm)
· Standard operating
voltage range compatible
with common AC
line voltages (130
V
AC
to 625 V
AC
)
· 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
E320116
116895E
LR91788
42201-006
Continuous
UltraMOVTM Series
Units
Steady State Applied Voltage:
DC Voltage Range (V
M(AC)RMS
)
130 to 625
V
Transients:
Single-Pulse Peak Current (I
TM
) 8x20s Wave (See Figure 2)
1,750 to 10,000
A
Single-Pulse Energy Range (W
TM
) 2ms Square Wave
12.5 to 400
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
%/ºC
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
2500
V
COATING Insulation Resistance
1000
M
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.
UltraMOVTM Varistor Series