TMOV14R275M Littelfuse Inc, TMOV14R275M Datasheet - Page 5

• Manufacturer Part Number: TMOV14R275M
• Description: VARISTOR THERMAL 275V 6KA 14MM
• Manufacturer: Littelfuse Inc
• Series: iTMOV®r

Specifications of TMOV14R275M

• Varistor Voltage: 473V
• Current-surge: 4.5kA
• Number Of Circuits: 1
• Maximum Ac Volts: 275VAC
• Energy: 110J
• Package / Case: Disc 14mm 3-Lead
• Technology: Metal Oxide
• Capacitance Value: 450pF
• Clamping Current: 50A
• Clamping Voltage: 710V
• Lead Style: Radial
• Ac Voltage Rating (max): 275VAC
• Operating Temp Range: -55C to 85C
• Mounting: Through Hole
• Surge Current (max): 6000A
• Product Depth (mm): 9.5mm
• Product Height (mm): 22mm
• Product Diameter (mm): 17mm
• Product: MOV
• Voltage Rating Dc: 473 V
• Voltage Rating Ac: 275 V
• Peak Surge Current: 6 KA
• Capacitance: 450 pF
• Operating Temperature Range: - 55 C to + 85 C
• Dimensions: 14 mm Dia.
• Termination Style: Radial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Maximum Dc Volts: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Varistor Products
Thermally Protected
TMOV
Lead Configurations
Note: MOVs are non-polarized passive elements
i TMOV Varistor Application Examples
The application examples below show how the indicator lead on the
iTMOV can be used to indicate that the thermal element has been
opened. This signifies that the circuit is no longer protected from
transients by the MOV.
Application Example 1 (Figure 1)
In this case, the LED is normally on, and is off when the thermal
element opens.
Application Example 2 (Figure 2)
This circuit utilizes an optocoupler to provide galvanic isolations
between the iTMOV varistor and the indicating or alarm circuitry.
Application Example 3 (Figure 3)
This circuit illustrates the use of the monitoring lead of the iTMOV
varistor to ensure that equipment is only operated when overvoltage
protection present. In normal operation the load switch relay solenoid is
powered via the indicator lead of the iTMOV varistor. In the event of the
thermal element being activated, the relay will de-activate, cutting power
to the protected circuit and the fault LED will illuminate.
Please note: Indicator circuits are provided as a guideline only.
Verification of actual indicator circuitry is the responsibility of the end
user. Component values selected must be appropriate for the specific
AC line voltage service and application.
®
and iTMOV
TMOV Varistor
®
Varistor Series
Thermal
Fuse
Element
MOV
w w w . l i t t e l f u s e . c o m
1
Figure 1. Application example 1
Figure 2. Application example 2
Figure 3. Application example 3
Line
Line
Line
Line Fuse
2
Neutral
Neutral
Line Fuse
Line Fuse
Neutral
3
iTMOV Varistor
iTMOV Varistor
iTMOV Varistor
i TMOV Varistor
2
1
3
Fault LED
(Normallyoff)
Monitor Lead
Thermal
Fuse
Element
LED
MOV
R
R
AC OPTOCOUPLER
Load Switch Relay
(loss of protection)
R
"Load Powered"
neon lamp
TO STATUS
ANNUNCIATOR
LIGHT/ALARM
31
2