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MidNite Solar MNSOB3R-4P-PSB Combiner Box w/ Disc

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MidNite Solar
MSRP: $917.00
$539.80 (You save $377.20)
SKU: ALG-053-02967
Note: 2-3 Week Lead Time
Condition: New
Weight: 10.00 LBS
Shipping: Calculated at checkout

 Product Description

MidNite Solar Disconnect Combiner Box - MNSOB3R-4P-PSB

Midnite Solar, Shut Off Box, 4 Pole Disconnect Control Switch, 20A per pole, 600VDC, for Birdhouse compatibility, includes MNDiscoPSB, NEMA 3R, MNSOB3R-4P-PSB

4 strings into the combiner with 2 separate 30 amp strings out. Specifically designed for the new dual channel MPPT on transformer-less inverters. This configuration will break the Positive and Negative of 2 separate 600vdc strings.

The difference between the regular Disco combiner and the DLTL version is that the MNPV8HV-Disco-4X is made for a single 8 string inverter, two 4 string inverters or one 4 string transformerless where as the DLTL is set up for 4 strings in and 2 strings out for Dual MPPT on transformerless.

The MidNite Disco line of PV combiners with disconnects are made to meet NEC requirements. The disconnect handle is bright red for visibility and can be locked in the off position. Several models can be configured for bi-polar or non-isolated inverters where both the positive and negative legs of the array need circuit protection. Models are available for 150 VDC, 300 VDC, or 600 VDC arrays. All of the combiners are made from powder-coated aluminum for long life in harsh conditions. A clear see-through dead front is supplied with all Disco combiners. Models are available with either NEMA 3R or NEMA 4X ratings. Many of these come with a shunt-trip disconnect and when supplied with the PSB circuit board, are compatible with the MidNite Rapid-Shutdown system to meet NEC 2014 requirements. Breaker versions do not include breakers. HV versions come with fuse holders except for the MNPV4HV Disco 3R Basic which needs fuse holders added.

The MidNite DLTL disconnect combiners have both dual-string fusing and dual-channel output. These work for inverters with ungrounded conductors and dual-MPPT input channels which are becoming common. Both the positive and negative legs are fused, and the fuse holders are included. They are also available with the Rapid-Shutdown PSB circuit board installed.

The MidNite SOB disconnect boxes, are not actually combiners but are used to transition from array to conduit wiring with an array disconnect. They have either two or four poles, so can disconnect dual channel output, either one or two strings. These work for inverters with grounded or ungrounded conductors and dual-MPPT input channels. The MNSOB boxes with suffix “-75A” are rated at 75A per pole for use with combined circuits. They are also available with the Rapid-Shutdown PSB circuit board installed.

The MidNite MNPV6-DISCO AC MIC is a basic disconnecting combiner for up to three 120/240 VAC micro-inverter circuits. The disconnect handle is bright red for visibility and can be locked in the off position. Made form powder-coated aluminum for long life in any environment. Add two pole AC DIN mount breakers from page 176. Add one two-pole breaker for each micro-inverter circuit, up to three circuits.


  • Highlights - Rapid shutdown system compliant. Birdhouse compatible. Type 3R aluminum enclosure (No Rust). Number of Fuse Holders (MNTS) installed - 8. 8 - 15 amp fuses installed. Current Rating - 60A. Max. Output Wire Size - 2/0. Output Circuits - 2. 90 degree C connections. See through dead front and color coded bus bar guards. #10 AWG wire internally. Meets 2014 NEC 690.12. Warranty - 5 yrs. Listed by ETL for US & Canada. Made in the USA.
  • Hardware Includes - Four - Strain Reliefs. Four - 1/2" LOCKNUTS. One BLUE WRENCH (MNWRENCH).


General Information  
Manufacturer: MidNite Solar
Product Line:
PV Combiners
Model ID:
Manufactured In: United States of America
Certifications and Safety Ratings: ul.jpg etl.jpg ce.gif fcc.jpg made-in-america.png


Mechanical Data
Technology: Combiner Box with Envoy
19.00 x 5.00 x 16.00 inches
Weight: 10.00 lbs
Maximum Volts: 600 Volts
Fuse/Fuse Holders: Not Required
Lug Temperature Rating: 90°C
Strain Reliefs & Hole Plugs: No
Enclosure Rating:
Type 3R
Enclosure: Powder Coated Aluminum
Number of PV Circuits: Four 2+ & 2-
Maximum String Fuse Rating: 20 Amp
Output Switch Rating: 100 Amp Switch
Positive Feed-Back: Yes
Optional Power Supply Board (MNDiscoPSB): Yes
Strings In/Out: Two/Two
Lockable: Yes
Listed to UL & CSA: UL1741 & C22.2
Output Wire Range: 10 AWG
Wire Range for String Input: 14 to 10 AWG
Mounting Options and Angle: Vertical Wall Mount, Pole Mount or Sloped Roof Mount to 14 Degrees Incline


Document Type
logo-adobe-pdf-2.jpgMidNite Solar MNPVSOB3R-4P-PSB Specs Specifications
logo-adobe-pdf-2.jpgMidNite Solar MNPVSOB3R-4P-PSB Installation Installation Guide
Warranty 5 Year Standard Warranty
logo-adobe-pdf-2.jpgMidNite Solar MNPVSOB3R-4P-PSB Warranty Warranty


Terms & Conditions
Shipping: Shipping Policy
Returns: Returns Policy
Payments: We accept: Visa, MasterCard, Discover, and American Express. We also accept checks, direct deposit and wire transfers for large orders.


MidNite Solar - MidNite Solar MNSOB3R-4P-PSB Combiner Box w/ Disc
Price: 539.8
Condition: new
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 Warranty Information

Warranty: 5 Year Standard Warranty

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