Request a Quote!

Customer Reviews
" is the best! They are such a pleasure to work with! Great brands at the best prices. Special thanks to Renée who always answered my questions on the spot, and giving thoughtful advice." Serge (Tahiti, French Polynesia)
"The experience I had with my purchase was very good. The items I ordered arrived when I expected & were packaged well. My overall purchasing experience was very positive."

- Thank you,
"I recently found EcoDirect & have been extremely happy with their service. They have had all the PV modules, inverters, optimizers and accessories I needed. They provide excellent customer service & turn orders around very quickly. I have switched to EcoDirect for all my parts & materials orders. Highly recommended."

- Zeno
"I wanted to let you know I am very pleased with the service you gave & the quality & condition of the solar panels I received from EcoDirect. I will purchase more items in the future from EcoDirect and will be sure to tell others about your fine operation."

"Thanks EcoDirect! My solar system is up and running; waiting for City and San Diego Gas & Electric inspections this week; so far so good!"

- J.L.,
Oceanside, CA
"I enjoyed ordering what I needed. It was simple and fast, no issues what so ever. If I need something else and its at a good price, I will defiantly order from here again. Also the shipping is at a good price."

- Simon
My shipment arrived on time, as predicted. Very, very good performance by EcoDirect. What more could you ask for from an online material supplier? Looks like the quantity from Quick Mount is spot on & the rails were bundled safely. EcoDirect will be my recommended source to my friends & neighbors for solar.
- Thank you, Jim Lake
Escondido, CA
"Over the past couple of years, I have purchased several items from Ecodirect and I have always been happy with their customer service and prompt delivery of products."

- Chris
"I am very satisfied, everything was as expected."

- Anon

  Home >

SMA SCCB-12-3R > 12 Input Combiner Box for Sunny Boy > NEMA 3R Enclosure
SMA 12 Input Combiner Box for Sunny Boy - NEMA 3R Enclosure - SCCB-12-3R

Warranty: 5 Years
Compliance: Buy American

Stock Status:(Out of Stock)
Availability: This item is no longer available.
Product Code: SMA-SCCB-12-3R


SMA 12 Input Combiner Box

NEMA 3R Enclosure
Manufacturer Part Number: SCCB-12-3R

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.



  • ELT Listed to UL 1741 for countries that require certification


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


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


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


(Sunny Boy)
(Sunny Central)
(Sunny Central)
(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

Share your knowledge of this product with other customers... Be the first to write a review