self-protected device. It consists of a 25mm square varistor
with an integral thermal disconnect designed to open in the
event of overheating due to abnormal overvoltage as outlined
in UL1449. The SMOV
®
helps facilitate SPD module compliance
to UL1449 and offers quick thermal response due to the close
proximity of the integrated thermal element to the MOV body.
This configuration also offers lower inductance than most discreet
solutions resulting in improved clamping performance to fast over
voltage transients.
The device has a separate micro-switch, which can be used to
indicate that the MOV has been disconnected from the circuit. This
separate switch makes the monitoring circuitry completely isolated
from the main power which ensures indicator circuit safety and
simplifies the customers circuit design.
Agency File Number
Agency Approvals
Agency
Agency Approval
Features
• Maximum single
surge capability 20 kA,
8/20 waveshape.
• Nominal Discharge
Current Value: 10kA.
• Intermediate current
rating: 50A/150A.
• Recognized to UL 1449.
• Lead-Free and RoHS
compliant.
• Integrated micro-switch for
indication circuitry/design.
UL1449
E320116
Additional Information
Datasheet
Resources
Samples
• -45°C to +75°C operating
temperature.
Applications
• SPD applications
• AC/DC distribution
• IT/Data center
• Power supplier
• Telecommunication
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart.
SMOV25S Varistor Series
Continous:
Steady State Applied Voltage:
DC Voltage Range (VM(DC))
AC Voltage Range (V
M(AC)RMS
)
Transient:
Non-Repetitive Surge Current, 8/20µs Waveform (I
TM
)
Non-Repetitive Energy Capability, 2ms Waveform (W
TM
)
Operating Ambient Temperature Range (T
A
)
Storage Temperature Range (T
STG
)
Hi-Pot Encapsulation (Isolation Voltage Capability)
Isolation Voltage Capability (when the thermal disconnect opens)
Housing Insulation Resistance
Units
150 to 970
115 to 750
20,000
170 to 670
-45 to +75
-45 to +85
2500
1500
>1,000
V
V
A
J
°C
°C
V
V
MΩ
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.
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