Littelfuse iTMOV Varistor Series - Manual

© 2013 Littelfuse, Inc. 207
Revised: October 21, 2013
Varistor Products
TMOV ® and i TMOV ® Varistor Series
Radial Lead Varistors > TMOV ® and iTMOV ® Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
TMOV
®
/iT
MOV
®
S
eries
RoHS
Description
Features
• RoHS compliant and
Lead–free available
• Patented integrated
thermal protection device
- Patent #US6636403
• Designed to facilitate
compliance to
UL1449 3nd Edition
for SPD product
• High peak surge current
rating up to 10kA
• Wave solderable
• Standard lead form
and spacing option
• Low leakage
• -55°C to +85°C
operating temp range
• Three-lead version
available for indication
purposes
Agency Approvals
Applications
• SPD Products
• AC Panel Protection
Modules
• AC Line Power Supplies
• Surge Protected
Strip Connectors
• AC Power Meters
• Relocatable AC
Power Taps
• GFCI (Ground Fault
Current Interupter)
• UPS (Uninterruptable
Power Supply)
• White Goods
• Plug-in SPD
• Inverters
• AC/DC Power Supplies
Agency Approval Agency File Number
UL1414 E56529
UL1449 E320116
QC 42201-C001,
QC42201-A001,
IEC 60950-1 (Annex Q)
E1274/F
IEC 61051-1,
IEC 61051-2,
IEC 60950-1 (Annex Q)
40021525
TMOV
®
and iTMOV
®
Varistor Series
The Littelfuse TMOV ® and iTMOV ® thermally protected
varistors represent a new development in integrated
circuit protection. Both versions are comprised of radial
leaded MOVs (Metal Oxide Varistors) with an integrated
thermally activated element designed to open in the
event of overheating due to the abnormal overvoltage,
limited current, conditions outlined in UL1449. The TMOV ®
and iTMOV ® varistor’s integrated thermal element, in
conjunction with appropriate enclosure design, helps
facilitate SPD module compliance to UL1449 for both cord
connected and permanently connected applications.
The TMOV ® and iTMOV ® varistors offer quick thermal
response due to the close proximity of the integrated
thermal element to the MOV body. The integrated
configuration also offers lower inductance than most
discrete solutions resulting in improved clamping
performance to fast overvoltage transients.
The iTMOV ® varistor differs from the TMOV ® varistor by the
inclusion of a third lead for the purpose of indicating that
the MOV has been disconnected from the circuit. This lead
facilitates connection to monitoring circuitry.
Additionally TMOV ® and iTMOV ® varistors are wave
solderable, thus simplifying end product assembly by
reducing the the expense and rework associated with hand
soldering operations.