Littelfuse TCMOV Varistor Series - Manual

© 2014 Littelfuse, Inc. 231
Revised: January 16, 2014
Varistor Products
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tcmov34s.html for current information.
TCMOV Varistor Series
Thermally Protected Varistors > TCMOV Series
Hi–En
E
rgy Mo
V’s
TCMOV S
eries
Description
The Littelfuse TCMOV is a thermally self protected device. It
consists of a 34mm varistor with an integral thermal disconnect
system designed to open in the event of overheating due to
abnormal over-voltage conditions, outlined in UL 1449. The TCMOV
helps facilitate SPD module compliance to UL1449 for type 1 and
type 2 applications.
The device integrates a micro-switch which is triggered by a
mechanical structure that makes the indicator circuit isolated from
the main power. If the device disconnects from the system power
the switch will change status. These features simplify the design
and save cost for the customer.
The TCMOV devices offer quick thermal response due to the close
proximity of the integrated thermal element to central section of
the MOV body. This configuration also offers lower inductance
than most discreet solutions resulting in improved clamping
performance to fast over-voltage transients.
Features
• Maximum single surge
capability up to 50kA,
8/20 waveshape.
• Nominal Discharge
Current Value: 20kA.
• SCCR: 200kA
• Integrated micro-switch
for indication
circuitry/design.
• Designed to facilitate
compliance to UL1449
for Type 1 and Type 2
SPD application.
• -45°C to +75°C operating
temperature.
• Recognized to UL
1449 3rd edition.
• RoHS compliant.
Applications
RoHS
• SPD applications
• AC/DC power
distribution systems
• High voltage
power supplies
• Photovoltaic systems
• Wind power systems
• Telecommunication
systems
• PLC Applications
• Power Transfer Switch
• Inverter
• UPS
TCMOV Varistor Series
Agency Approvals
Agency Agency File Number
E320116
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Contact your Littelfuse product representative for additional information.
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
TCMOV Series Units
Continous:
Steady State Applied Voltage:
DC Voltage Range (VM(DC)) 150 to 700 V
AC Voltage Range (V
M(AC)RMS
) 115 to 550 V
Transient:
Non-Repetitive Surge Current, 8/20µs Waveform (I
TM
) up to 50,000 A
Non-Repetitive Energy Capability, 2ms Waveform (W
TM
) 280 to 960 J
Operating Ambient Temperature Range (T
A
) -45 to +75 °C
Storage Temperature Range (T
STG
) -45 to +85 °C
Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current < 0.01% °C
Hi-Pot Encapsulation (Isolation Voltage Capability) 2500 V
Isolation Voltage Capability (when the thermal disconnect opens) 1500 V
Housing Insulation Resistance >1,000 MΩ
1. cUR and UR approved for Type 2 SPD Application
2. UR approved for Type 1 SPD Application