COMBINER BOXES. SMA America, LLC

Simplify wiring for added convenience and safety

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.

Certified

ELT Listed to UL 1741 for countries that require certification

Convenient

Greatly simplifies input and output wiring
Available in 6 to 52 circuit configurations

Reliable

Reliable bus-work for efficient high current conductor combining
Compact, rugged NEMA 3R/4 wall mount steel enclosure

Safe

PV positive wires all land directly on Touch Safe™ fuse holders

	SBCB-6 (Sunny Boy)	SCCB-12 (Sunny Central)	SCCB-28 (Sunny Central)	SCCB-52 (Sunny Central)
Number of Inputs (Positive & Negative)	6	12	28	52
Positive Input Wire Size	10 to 6 AWG	10 to 6 AWG	10 to 6 AWG	10 to 6 AWG
Positive Input Terminal Torque	14 in-lb.	14 in-lb.	14 in-lb.	14 in-lb.
Negative Input Wire Size	10 to 6 AWG	10 to 6 AWG	10 to 6 AWG	10 to 6 AWG
Negative Input Terminal Torque	35 in-lb.	35 in-lb.	35 in-lb.	35 in-lb.
Output Wire Size	6 AWG to 350 KCMIL	6 AWG to 350 KCMIL	6 AWG to 350 KCMIL	6 AWG to 300 KCMIL
Output Terminal Torque	350 in-lb.	350 in-lb.	350 in-lb.	350 in-lb.
Max. Input Fuse Rating (Midget)	15 A, 600 VDC	20 A, 600 VDC	15 A, 600 VDC	8 A, 600 VDC
Max. Output Current	90 ADC	240 ADC	420 ADC	416 ADC
Max. Continuous Output Current	72 ADC	192 ADC	336 ADC	333 ADC
Max. Number of Output Wires	1 Pos, 1 Neg	1 Pos, 1 Neg	2 Pos, 2 Neg	2 Pos, 2 Neg
PV Array Configuration	Negative Grounded*	Negative Grounded*	Negative Grounded*	Negative Grounded*
Enclosure Type	NEMA 3R/4, Steel	NEMA 3R/4, Steel	NEMA 3R/4, Steel	NEMA 3R/4, Steel
Weight (Approximate)	11 lbs	48 lbs	56 lbs	70 lbs
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

Other sizes and designs available upon request. *Fusing available on positive or negative input, specify when ordering