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SMA 28 Input Combiner Box
NEMA 4 Enclosure
Manufacturer Part Number: SCCB-28-4
SMA’s Sunny Boy / Sunny Central Combiner Boxes are ETL Listed to UL 1741 for countries requiring certification. Available in sizes ranging from six to 52 PV inputs, they provide greater flexibility and expandability in system design. Oversized bus-work adds high efficiency and dependability where it’s needed most. The large NEMA 3R/4 enclosure provides ample room for conductors, which reduces installation time. Designed with installers in mind, the Sunny Boy/Sunny Central Combiner Boxes save valuable time and resources while improving system design and reliability.
Features
Certified
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ELT Listed to UL 1741 for countries that require certification
Convenient
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Greatly simplifies input and output wiring
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Available in 6 to 52 circuit configurations
Reliable
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Reliable bus-work for efficient high current conductor combining
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Compact, rugged NEMA 3R/4 wall mount steel enclosure
Safe
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PV positive wires all land directly on Touch Safe fuse holders
Specifications
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SBCB-6 (Sunny Boy) |
SCCB-12 (Sunny Central) |
SCCB-28 (Sunny Central) |
SCCB-52 (Sunny Central)
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Number of Inputs (Positive & Negative) |
6 |
12 |
28 |
52
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Positive Input Wire Size |
10 to 6 AWG |
10 to 6 AWG |
10 to 6 AWG |
10 to 6 AWG
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Positive Input Terminal Torque |
14 in-lb. |
14 in-lb. |
14 in-lb. |
14 in-lb.
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Negative Input Wire Size |
10 to 6 AWG |
10 to 6 AWG |
10 to 6 AWG |
10 to 6 AWG
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Negative Input Terminal Torque |
35 in-lb. |
35 in-lb. |
35 in-lb. |
35 in-lb.
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Output Wire Size |
6 AWG to 350 KCMIL |
6 AWG to 350 KCMIL |
6 AWG to 350 KCMIL |
6 AWG to 300 KCMIL
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Output Terminal Torque |
350 in-lb. |
350 in-lb. |
350 in-lb. |
350 in-lb.
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Max. Input Fuse Rating (Midget) |
15 A, 600 VDC |
20 A, 600 VDC |
15 A, 600 VDC |
8 A, 600 VDC
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Max. Output Current |
90 ADC |
240 ADC |
420 ADC |
416 ADC
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Max. Continuous Output Current |
72 ADC |
192 ADC |
336 ADC |
333 ADC
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Max. Number of Output Wires |
1 Pos, 1 Neg |
1 Pos, 1 Neg |
2 Pos, 2 Neg |
2 Pos, 2 Neg
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PV Array Configuration |
Negative Grounded |
Negative Grounded |
Negative Grounded |
Negative Grounded
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Enclosure Type |
NEMA 3R/4, Steel |
NEMA 3R/4, Steel |
NEMA 3R/4, Steel |
NEMA 3R/4, Steel
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Weight (Approximate) |
11 lbs |
48 lbs |
56 lbs |
70 lbs
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Dimensions W x H x D in inches |
8 x 10 x 6 |
16 x 16 x 6 |
20 x 20 x 8 |
30 x 42 x 12
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