Description
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
TVSS 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.
Features
• RoHS compliant and Lead–free available
• Patented integrated thermal protection device - Patent #US6636403
• Designed to facilitate compliance to UL1449 2nd Edition for TVSS
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
Applications
• TVSS 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 TVSS
• Inverters
• AC/DC Power Supplies
