Varistor Products
Thermally Protected
TMOV® and iTMOV® Varistor Series
The Littelfuse TMOV and iTMOV thermally protected varistors represent a new development in integrated circuit protection (patent pending). 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 over-voltage, limited current, conditions outlined in UL1449. 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. 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 over-voltage transients. Additionally, TMOV and iTMOV varistors are wave solderable, thus simplifying end product assembly by reducing the expense and rework associated with hand soldering operations. The TMOV and iTMOV varistors are both recognized surge suppression components to UL 1449. 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. TMOV and iTMOV varistors are compatible for use with industry standard wave-soldering processes or recommended hand-soldering methods.
®
®
2
VARISTOR PRODUCTS
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
Features
• Patent Pending Integrated Thermal Protection Device • Designed to facilitate compliance to UL1449 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 Temperature Range • Three-lead version available for indication purposes.
AGENCY APPROVALS:
Documented in UL file E75961. CSA recognized. Qualitfied to IEC-CECC for ratings from 115 - 625VAC
20mm Devices-Recognized under the components program of Underwriters Laboratories UL1449 and UL1414. Includes selected tests from UL1020, regarding thermal cutoffs for devices with voltage ratings up to 420VAC. 14mm Devices-Devices are approved as an MOV to UL1449 and UL1414. Approval to selected UL1020 requirements pending. Devices (14mm and 20mm) with ratings greater than 420VAC are not affected by these abnormal voltage conditions. Accelerated Aging Testing-14 and 20mm devices comply with Acclerated Aging Test requirements per. ANSI/IEEE C62.11 and may be used in secondary surge arrestors without repeating this test.
AGENCY FILE NUMBERS: ULE56529 (UL1414)
ULE75961 (UL1449) CSA LR91788 QC 42201-x001 Cert E1274/F (IEC-CECC)
27
w w w. l i t t e l f u s e . c o m
Varistor Products
Thermally Protected
TMOV® and iTMOV® Varistor Series
TMOV and iTMOV Varistor Series Absolute Maximum Ratings Absolute Maximum Ratings UNITS
V
For ratings of individual members of a series, see Device Ratings and Specifications chart
TMOV / iTMOV Varistor Continuous: Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 to 750 Transient: Peak Pulse Current (ITM) For 8x20µs Current Wave, single pulse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6000 to 10,000 Single-Pulse Energy Capability For 2ms Current Wave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 to 480
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85oC Storage Temperature Range (TSTG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to 125oC Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 420 V. See table on page 34.
20
R
150
E
Series Designator E: 2- Leaded TMOV Varistor Series Supplied in Bulk Pack with 7.5mm lead spacing. M: 3-Leaded iTMOV Varistor Series Supplied in Bulk Pack with 7.5mm lead spacing (between leads 1 & 2)
(Available in 20mm only)
Additional Options
Tape and Reel
• Add suffix L2T7 to the end of standard part number (ex. TMOV20R150EL2T7) • Tape and Reeled parts have in-line, crimped leads. This excludes the varistor lead on i TMOV devices which are not crimped and not in-line. See drawings on page 35.
Alternative Leadstyles:
• Contact factory for details
w w w. l i t t e l f u s e . c o m
33
VARISTOR PRODUCTS
Varistor Products
Thermally Protected
TMOV® and iTMOV® Varistor Series
General Dimensions, Bulk Pack Non-Crimped Devices
TMOV Varistor SYMBOL Vrms Model Voltage Model Size 14mm MIN mm (in) 17.0 (0.669) 13.5 (0.531) 6.5 (0.256) 1.5 (0.059) 2.0 (0.079) MAX mm (in) 22.0 (0.866) 17.0 (0.669) 8.5 (0.335) 4.0 (0.157) 6.0 (0.236) 20mm MIN MAX mm mm (in) (in) 23.0 28.0 (0.906) (1.10) 19.0 23.0 (0.748) (0.906) 6.5 8.5 (0.256) (0.335) 1.5 4.0 (0.059) (0.157) 2.0 6.0 (0.079) (0.236) 2.0 0 (0.079) 14mm MIN MAX mm mm (in) (in) 17.0 22.0 (0.669) (0.866) 13.5 17.0 (0.531) (0.669) 6.5 8.5 (0.256) (0.335) 1.5 4.0 (0.059) (0.157) 2.0 6.0 (0.079) (0.236) 20mm MIN mm (in) 23.0 (0.906) 19.0 (0.748) 6.5 (0.256) 1.5 (0.059) 2.0 (0.079) 0 4.0 (0.138) 0 9.0 (0.335) 9.5 (0.374) 11.0 (0.433) 9.0 (0.335) 9.5 (0.374) 11.0 (0.433) 12.0 (0.472) 13.0 (0.512) 25.4 (1.00) 25.4 (1.00) 6.0 (0.236) 0.76 (0.030) 0.86 (0.034) 0.76 (0.030) 0.95 (0.037) 0.86 (0.034) 1.05 (0.041) 0.76 (0.030)
Dia D ?
iTMOV Varistor
A Dia D e
ALL ALL ALL 115-175
e1
200-420 460-750
MAX mm (in) 28.0 (1.10) 23.0 (0.906) 8.5 (0.335) 4.0 (0.157) 6.0 (0.236) 2.0 (0.079) 6.0 (0.236) 2.0 (0.079) 9.0 (0.335) 9.5 (0.374) 11.0 (0.433) 12.0 (0.472) 13.0 (0.512)
e2 e3
ALL ALL 115-175 200-320
6.0 (0.236) 2.0 (0.079) 9.0 (0.335) 9.5 (0.374) 11.0 (0.433)
4.0 (0.157) 0
E
385-460 510-575 625-750
L L3
ALL ALL
25.4 (1.00)
25.4 (1.00) 6.0 (0.236) 0.86 (0.034) 0.76 (0.030) 0.95 (0.037) 0.86 (0.034) 0.76 (0.030)
Dia D
115-420 Dia b Dia c 460-750 ALL
0.76 (0.030)
0.86 (0.034) 1.05 (0.041) 0.86 (0.034)
Outside Lead Only
A
A
L3 L
Dia b
L
Dia c Dia b
e3
E e e1
E e e2 e1
For 14mm ratings above 420 Vrms contact factory for specifications. 34
w w w. l i t t e l f u s e . c o m
Varistor Products
Thermally Protected
TMOV® and iTMOV® Varistor Series
Tape and Reel Specifications - Additional Option L2T7
2
TMOV varistor with outer crimp
P P2 ∆P ∆P ∆H ∆H
B1
H1 H0
SEATING PLANE
W0 W2 W1 ∅b
∅D0 P P0 t
iTMOV varistor with inner crimp
• Reel capacity varies with voltage. • Leads are crimped and in-line. This excludes the varistor lead on i TMOV devices which are not crimped and not in-line. • To order tape and reel option please add suffix L2T7 to end of standard part number. • Tape and Reel option is available for rated voltages up to 420volts. Contact factory regarding availability of higher voltages. Contact Littelfuse for additional details.
Pack Quantities
NOTE: Tape and Reel available up to 420V only - please contact factory regarding availability of higher voltage parts.
w w w. l i t t e l f u s e . c o m
35
VARISTOR PRODUCTS
