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Littelfuse iTMOV Varistor Series User Manual

Varistor products, Tmov, Varistor series

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© 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.