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Midnite Solar MNSPD-300 > 300 Volt DC Surge Protection Device

Midnite Solar 300 Volt DC Surge Protection Device - MNSPD-300-DC

Our Price: $95.00
Warranty: 5 Years
Compliance: Buy American

Product Code: MS-MNSPD-300-DC

Description Videos Datasheet

Midnite Solar 300V DC Surge Protection Device

Manufacturer Part Number: MNSPD-300-DC

The MidNite SPD is a welcome replacement for less sophisticated arrestors that have been the mainstay of the industry for many years.

It is a 300V Surge Protector Device (MNSPD) is a Type 1 device designed for indoor and outdoor applications. Engineered for both AC and DC electric systems, it provides protection to service panels, load centers or where the SPD is directly connected to the electronic device requiring protection. Protection for Classic and other charge controllers, off grid PV combiners and 120/240 VAC circuits.

The DC SPD will work well on all DC circuits up to 300 volts as well as any 120/240 VAC circuits. The difference between the AC and DC SPD is the way the LED’s are powered. The protection side of things are identical.


Part No. MNSPD-300-DC
Nominal Voltage 0 to 300 VDC
MCOV VRMS @1mA 470V (423-517)
ClampV @ 100A Current 8/20µs 775V
I peak (8/20µs) (Current) 115kA (Full Device)
57.5kA (Each Section)
Energy Absorption 3130 J (Full Device)
1560 J (Each Section)
Suggested Placement Offgrid PV combiners
Charge controller inputs up to 300 VDC
Diagnostics Dual Operating LED Indicators. When voltage is present Operating Temperature Range -40°c to +85°c
Nominal Discharge Current INA 57.5kA
Thermal Disconnector Internal
Response time <1micro sec

Detailed Description

The SPD is offered in three different voltages to maximize the required protection level. Protection is achieved by reducing the clamping voltage to a safe level that your system can sustain without damaging any electronics in the system. The MNSPD is designed to clamp a 115,000 amp surge! Blue LED’s provide visual indication of operation from a distance.

The MidNite Solar Advantage

Due to the growing solar industry, there are numerous listed SPDs entering the market. These new din rail mount SPDs, like the MidNite versions, are much better at clamping surges to a safe voltage level than previously available lightning arrestors. However, din rail SPDs are physically small and typically can only provide 1/8th the protection of the MidNite product.

When exposed to transients above their capability, permanent damage occurs. Din rail SPDs are always mounted inside of a box such as a PV combiner up on a roof top. When the din rail SPD fails from a near lightning strike, it just quits working. This means that it also quits protecting. Since it is locked away inside of a box, you have no way of knowing it has failed until your next lightning storm!

The Midnite SPDs are mounted on the outside of a PV combiner and have blue LEDs viewable from a distance that show your system is still protected.

The MidNite SPDs are built to last. Each MNSPD is capable of clamping a 115,000 amp surge. In the event that the MNSPD does eventually wear out, they can easily be repaired.

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