SPD Manual

Page 2 of 7 10-055-1 REV E Date: 08/27/2018
The MidNite Solar SPD is offered in three different voltages to maximize the required protection level.
Protection is achieved by reducing the clamping voltage to a safe voltage that your system can sustain
without damaging any electronics in the system. By using the chart on page 2 select the SPDs that
provide the protection your system requires.
The maximum operating voltage of the SPD must be higher than the system voltage.
If the SPD operating voltage is equal to or lower than the system voltage the SPD will see this as an
overvoltage event and begin shunting current to ground.
This can result in degraded performance, or failure of the SPD, and it is not so good for the system
either. Selecting the correct voltage SPD will provide excellent protection and peace of mind for years
to come.
Midnite Solar Surge Protection Device. 8-009-1
Part No.
MNSPD115
MNSPD300AC and DC
MNSPD600
Nominal Voltage
0 to 90 VAC
0 to 115 VDC
0 to 250 VAC (AC model)
0 to 300 VDC (DC model)
0 to 485 VAC
0 to 600 VDC
MCOV
VRMS @1mA
180V (162-198)
470V (423-517)
780V (702-858)
ClampV @ 100A
Current 8/20µs
295V
775V
1290V
I peak (8/20µs)
(Current)
100kA (Full Device)
50kA (Each Section)
100kA (Full Device)
50kA (Each Section)
100kA (Full Device)
50kA (Each Section)
Energy Absorption
1120 J (Full Device)
560 J (Each Section)
3130 J (Full Device)
1560 J (Each Section)
4320 J (Full Device)
2160 J (Each Section)
Suggested Placement
Up to 90 VAC circuits,
12V,24V,48V DC battery
circuits
120/240VAC circuits, offgrid PV
combiners and charge controller
inputs up to 300VDC,
316V/480VAC circuits
Grid tie PV combiners
Grid tie inverter input
Diagnostics
SPD300AC -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
INA
20kA
Thermal Disconnector Internal
Internal
Response time
<15n sec.