KVM6 - KVM Series

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Littelfuse Voltage Monitoring Relays
The KVM Series is a single-phase undervoltage monitor designed to protect sensitive equipment against brownout undervoltage conditions. The compact design and encapsulated construction make the KVM an excellent choice for OEM equipment.

The output relay is energized and the LED glows green when the input voltage is above the reset voltage threshold. If the input voltage drops below the undervoltage setpoint, the output relay and LED will de-energize. The output relay will remain de-energized as long as the input voltage is below the reset voltage. Reset is automatic when the input voltage returns to a normal range.

Property (Mouseover for details) Value
Input Voltage (V) 110 to 120VAC or 220 to 240VAC
Input Type Single phase
Input AC Line Frequency (Hz) 50/60Hz
Output Form SPDT
Output Load Rating (VA) 8A resistive @ 120VAC; 1/3hp @ 120/240VAC
Reset Time (ms) Power off reset time ≤150ms
Repeat Accuracy (%) ±0.5% under fixed conditions; ±1% over temperature range
Undervoltage Reset Point (%) Fixed at 209VAC
Undervoltage Sensing Range (V) Undervoltage setpoint: 156 to 199VAC
Voltage Sensing Accuracy (%) ±2% at 25C
Power Consumption 2.5W @ 132VAC; 4.5W @ 264VAC
Indication LED glows green when output is energized
Insulation Resistance ≥100 MΩ
Isolation Voltage (V) ≥1500V RMS input to output
Surge Protection IEEE C62.41-1991 Level A
Circuitry Encapsulated
Life Mechanical - 1 x 106; Electrical - 1 x 105
Termination Type 0.25 in. (6.35mm) male quick connect terminals
Mounting Method Surface mount with one #10 (M5 x 0.8) screw
Operating Temperature -25° to 55°C (-13°F to 131°F)
Storage Temperature (F/C) -40° to 85°C (-40°F to 185°F)
Humidity 95% relative non-condensing
Dimensions 2.00 x 2.00 x 1.21 in. (50.8 x 50.8 x 30.7mm)
Weight (lbs/g) 2.6oz (74g)