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OutBack & Midnite Solar Breakers & Fuses

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Overcurrent Protection; National Electric Code, 690.9

Circuits and Equipment. solar source circuit, solar output circuit, inverter output circuit, and storage battery circuit conductors and equipment shall be protected in accordance with the requirements of Article 240. Protection devices for solar source circuits and PV output circuits shall be in accordance with the requirements of 690.9(B) through (E). Circuits, either ac or dc, connected to current-limited supplies (e.g., solar modules, ac output of utility-interactive inverters), and also connected to sources having significantly higher current availability (e.g., parallel strings of modules, utility power), shall be protected at the source from overcurrent.

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DIN Mount AC Circuit Breakers
These are DIN mount AC breakers with set-screw compression terminals for 14 to 2 AWG wire. Use these for AC in OutBack FLEXware, MidNite E-Panels, and Magnum panels. DIN rail mount with set-screw compression terminals, #14 to 2 AWG (1.62 mm to 6.54 mm)
Breaker Amps Voltage Rating OutBack Model MidNite Model Part Number   Price  
10 120 DIN-10-AC-277 MNEAC10 05303060 breaker
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15 120 DIN-15-AC MNEAC15 03004415 breaker
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15 120/240 DIN-15D-AC MNEAC15-2P 03004416 breaker
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20 120 DIN-20-AC MNEAC20 5300019 breaker
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20 120/240 DIN-20D-AC MNEAC20-2P 5300117 breaker
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25 120/240 DIN-25D-AC -- 5300051 breaker
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15 277 DIN-15-AC-277 MNEAC15QZD 5300096 breaker
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30 277 DIN-30-AC-277 MNEAC30QZD 5300053 breaker
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30 277 DIN-30D-AC-480 MNEAC30QZD2P 5300054 breaker
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30 277/480 DIN-30T-AC-480 MNEAC30QZD3P 03004435 breaker
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50 277 DIN-50-AC-277 MNEAC50QZD 5300061 breaker
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50 277 DIN-50D-AC-480 MNEAC50QZD2P 5300063 breaker
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50 277/480 DIN-50T-AC-480 MNEAC50QZD3P 5300116 breaker
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60 277 DIN-60-AC-277 -- 5300097 breaker
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60 277 DIN-60D-AC-277 MNEAC60QZD2P 05303036 breaker
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60 120/240 VAC -- MNEAC60-2P 05304038 breaker
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DIN Mount 150 VDC Circuit Breakers
DIN rail mount breakers fit MidNite and Magnum enclosures, and MNPV and OutBack PV array combiners. The positive line should be connected to the + pole of the breaker. The maximum PV array voltage must not exceed the voltage rating of the breakers used. Width (inches) 0.5
MidNite’s breakers are rated to break the full rated load at the rated voltage repeatedly, with NO DAMAGE. Always use a properly sized breaker for disconnecting.
MNEPV breakers are the same as CBI QY breakers except the standard used is inadequate for the solar industry. MidNite breakers have been evaluated by ETL to 150VDC and are listed for US and Canada. All of the NRTL listings still apply. Breakers ordered under the CBI part numbering system will not be listed for 150VDC and in many cases are not suitable for the solar industry. 150VDC ETL listed in the US and Canada.
Breaker Amps OutBack Model MidNite Model Part Number   Price  
1 DIN-1-DC MNEPV1 5300099 breaker
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2 DIN-2-DC MNEPV2 5300100 breaker
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3 DIN-3-DC MNEPV3 5300101 breaker
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4 DIN-4-DC MNEPV4 5300102 breaker
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5 DIN-5-DC MNEPV5 5300103 breaker
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6 DIN-6-DC MNEPV6 5300104 breaker
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8 DIN-8-DC MNEPV8 5300091 breaker
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9 DIN-9-DC MNEPV9 5300106 breaker
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10 DIN-10-DC MNEPV10 5300030 breaker
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12 -- MNEPV12 5300107 breaker
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15 DIN-15-DC MNEPV15 5300031 breaker
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20 -- MNEPV20 5300032 breaker
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30 -- MNEPV30 5300033 breaker
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40 -- MNEPV40 5300108 breaker
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50 -- MNEPV50 5300109 breaker
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63 -- MNEPV63 5300034 breaker
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DIN Mount 300 VDC Circuit Breakers
These breakers fit MidNite MNPV and OutBack combiners. Use breakers for arrays with maximum voltage of 300 or less 200 - 250 VDC charge controllers. 20/50 Amp 300 VDC 4 Pole Din Rail Mount Breaker. Width (inches) 2"
Breaker Amps Mount type Data MidNite Model Part Number   Price  
20 DIN rail with screw lugs dc MNEPV20-300 5301085 breaker
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30 DIN rail with screw lugs dc MNEPV30-300 05303125 breaker
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50 DIN rail with screw lugs dc MNEPV50-300 05303130 breaker
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Din Rail Mounted Fuses and Fuse Holders

fuse box

The fuse holder and fuses listed here fit MidNite MNPV and OutBack FLEXPV combiners and other 600 VDC solar combiners but do NOT fit Soladeck combiners. These UL listed fuses are used in many grid tied high voltage residential and commercial systems.

Fuse Holder / Fuses breakers Volts VDC AMPS Mount Price Select Size from Drop Down Menu
 FUSE HOLDER FOR KLKD DIN MOUNT 600 VDC 30A Max BP8960309  busbar 600 1 - 30  Din Rail Mount 
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 1 - 30 Amp FUSE KLKD  busbar 600 1 - 30  Din Rail Mount 
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Fuse

 

OutBack DC DIN Mount Breakers

DIN rail mount breakers are hydraulic-magnetic type and are not affected by high ambient temperatures.

Model Current Rating Voltage Rating* Terminals Width
OBB-1-125VDC-DIN 1 Amp 125VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-2-150VDC-DIN 2 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-3-150VDC-DIN 3 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-4-150VDC-DIN 4 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-5-150VDC-DIN 5 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-6-150VDC-DIN 6 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-8-150VDC-DIN 8 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-9-150VDC-DIN 9 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-8-150VDC-DIN 8 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-10-150VDC-DIN 10 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-15-150VDC-DIN 15 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-20-150VDC-DIN 20 Amp 125VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-30-125VDC-DIN 30 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-50-150VDC-DIN 50 Amp 125VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)
OBB-60-125VDC-DIN 60 Amp 150VDC #14 to 2 AWG clamp terminals 0.5" (13 mm)

 

* Approved for maximum VOC of 15O VDC by ETL for PV array applications only.

OutBack High Voltage DIN Mount Fuse Holders and Fuses

Fuse holders are DIN rail mount with #8 AWG set-screw type compression terminals. Touch-safe design and not rated for load make or load break usage. Maximum of eight fuse holders in one PSPV enclosure.

Model Description Current Rating Voltage Rating Width
OBF-6-600VDC Fuse 6 Amp 600VDC N/A
OBF-10-600VDC Fuse 10 Amp 600VDC N/A
OBF-15-600VDC Fuse 15 Amp 600VDC N/A
OBFH-30-600VDC-DIN Fuse Holder 30 Amp 600VDC 0.7 " (18 mm)

 

Terminal Bus Bars

Used for adding more wire terminations or for isolating multiple positive/negative circuits. All TBB models have three #1/0 to 14 AWG and eight #6 to 14 AWG screw type compression terminals, which means no ring lugs are required. Available with black, white, red, blue and brown insulators. All required TBBs are included with the AC Input-Output-Bypass Assemblies.

Model Description Terminals
TBB-GROUND Ground/Neutral terminal bus bar and mounting screws (no insulators) Three #1/0 to 14 AWG and Eight #6 to 14 AWG screw type compression
TBB-BLACK Bus bar with black insulators and mounting screws Three #1/0 to 14 AWG and Eight #6 to 14 AWG screw type compression terminals
TBB-BLUE Bus bar with blue insulators and mounting screws Three #1/0 to 14 AWG and Eight #6 to 14 AWG screw type compression terminals
TBB-RED Bus bar with red insulators and mounting screws Three #1/0 to 14 AWG and Eight #6 to 14 AWG screw type compression terminals
TBB-WHITE Bus bar with white insulators and mounting screws Three #1/0 to 14 AWG and Eight #6 to 14 AWG screw type compression terminals
TBB-BROWN Bus bar with brown insulators and mounting screws Three #1/0 to 14 AWG and Eight #6 to 14 AWG screw type compression terminals

MidNite Solar DC Breakers

 

 

Circuit Breakers and Fuses over current protection; electrical distribution

Circuit breakers and fuses are called over-current protection equipment because they do exactly that. Located in combiners, main breaker panels, subpanels and occasionally sometimes inside inverters they protect the house wiring from overloads which can be a fire hazard. A circuit or wire overload occurs when the load placed on the circuit is greater than the rating of the overcurrent breaker or fuse. A direct short is when the hot and neutral wires are either directly or in a roundabout way touching. A ground fault is a short in which the hot wire touches a piece of metal or human that is grounded.

Circuit breakers are the most common use of overcurrent protection because they are safe and easy to disconnect or reset. A circuit breaker acts in a similar fashion to a fuse in that it measures overcurrent in a circuit but instead of blowing the fuse it opens the circuit. Breakers are unique in that not only do they detect overcurrent in a circuit, they are designed to be ambient compensated. That is they are engineered to de-rate as the air around the breaker heats up. Example, a 20 amp breaker is sitting between two other breakers generating a great deal of heat, the 20 amp breaker may trip at 16 amps. MidNite Solar breakers are unique and especially well-suited for PV systems because they are rated to break the full rated load at the rated voltage repeatedly, with NO DAMAGE.

Single-pole breakers control the amps on loads that use only one leg of the incoming 240 volts AC. Double-pole breakers rated at 120/240 VAC control amps on both legs of the load. Double-pole breakers normally consist of two single-pole breakers with a shared handle and internal trip. On high voltage DC circuits single pole breakers are stack from two to four to achieve a safe and code compliant over-current protection.