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The MidNite Solar 300V DC Surge Protector Device (MNSPD) is a Type 2 device per UL1449 rev3 and has an outdoor rating of 4X for outdoor use. Protection for Classic and other charge controllers, off grid PV combiners and 120/240 VAC circuits.


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Midnite Solar Surge Protection Device
Nominal Voltage0 to 90 VAC0 to 250 VAC (AC model)0 to 485 VAC
0 to 115 VDC0 to 300 VDC (DC model)0 to 600 VDC
MCOV180V (162-198)470V (423-517)780V (702-858)
ClampV @100A295V775V1290V
Current 8/20μs
I peak (8/20μs)100kA (Full Device)100kA (Full Device)100kA (Full Device)
(Current)50kA (Each Section)50kA (Each Section)50kA (Each Section)
Energy Absorption1120 J (Full Device)3130 J (Full Device)4320 J (Full Device)
560 J (Each Section)1560 J (Each Section)2160 J (Each Section)
Suggestes PlacementUp to 90 VAC circuits, 12V, 24V, 48V DC battery circuits120/240VAC circuits, offgrid PV combiners and charge controller inputs up to 300VDC316V/480VAC circuits Grid tie PV combiners Grid tie inverter input
DiagnosticsSPD300 AC – LED indicators when voltage is present between L1+Ground and L2+Ground
SPD115, 300DC and 600 – LED indicators when voltage is present between DC+ and DC-
Operating Temperature Range-40°c to +85°c
Nominal Discharge Current INA20kA
Thermal Disconnector InternalInternal
Response Time<15n sec.


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