Midnite Solar Surge Protection Devices

MidNite Solar offers a range of surge protection devices (SPDs) designed to protect solar power systems and their components from voltage spikes and transient surges. Surge protection is critical in solar installations as it helps safeguard expensive equipment like inverters, charge controllers, and solar panels from potential damage caused by lightning strikes, grid voltage fluctuations, or other electrical disturbances.

Nominal Voltage- 

  • MNSPD300-DC- 0-300VDC
  • MNSPD300-AC- 0-250VDC
  • MNSPD-600- 0-480VAC, 0-600VDC


  • MNSPD300-DC- 470V
  • MNSPD300-AC- 470V
  • MNSPD-600- 780V

VPR Line To Ground- 

  • MNSPD300-DC- 1200V
  • MNSPD300-AC- 1200V
  • MNSPD-600- 1800V

Suggested Placement- 

  • MNSPD300-DC- Off-grid PV combiners Charge Controller inputs up to 300VDC
  • MNSPD300-AC- 120/240 VAC Circuits
  • MNSPD-600- 316V/480 VAC circuits Grid-tie PV combiners Grid-tie inverter input Non-isolated inverters

Type- UL1449 4th Ed. Type 1

Thermal Disconnector- Internal Fuse

Response Time- <1 Micro Second


Surge Current Rating per Phase- 80kA

Short Circuit Current Rating- 10kA

Fusing- Individually fused MOVs

Thermal Fusing- Yes

Over Current Fusing- Yes

Operating Frequency- 0-500Hz

Mechanical Description

Enclosure- Polycarbonate UL94V-0

Environmental Rating- Type 4X

Connection Method- #12 AWG

Weight- 1lbs

Dimensions- 4.4"L x 3.8"W x 3.5"D

Mounting Method- 1/2" Conduit Knockout

Operating Altitude- Sea Level- 12,000' (3,658 Meters)

Storage Temperature- -40°F- 185°F (-40°C-85°C)

Operating Temperature- -40°F-185°F (-40°C-85°C)


Blue Status LED, One Per Leg

Listings and Performance-

UL Standard for Safety, UL 1449 Surge Protective Devices-Fourth Edition CSA C22.2 No. 8-M1986 Electromagnetic Interference (EMI) Filters, Fourth Edition.