Data Sheet

 User's Guide


 Universal Alarm Box


Solar Pass Through Box - Fused Positive Side
Solar Power Pass Through Box
Series: SPTB-3R


     Models For 2 or 3-String Connection

     Rated at 600 Vdc, 30 Amps Per String

     Positive Side Fuse Holder

     NEMA 3R, Painted Steel Box

     Includes Input/Output 3-hole Cable Glands


  • Multi String Solar Power Systems
  • Adds Fusing Before Inverter

SPTB-3R Series Solar Power Pass Through Boxes are rugged units that feature a weatherproof, Painted Steel, UL listed NEMA 3R rated enclosure. Models are available in 2 and 3 string Positive side fused setup and are rated for 600 Vdc continuous duty at up to 30 Amps per string.

General Specifications
Operating Temperature: -40 to 130 F (-40 to 60 C)
Enclosure Size: 9 x 5.5 x 3"
Enclosure: Material: Painted Steel
Enclosure Rating: NEMA 3R, UL Listed
Fuse Size: 10 x 38mm (30A Max)

Available Models
Model Number SPTB-3R-2 SPTB-3R-3
Input Circuits (Positive Only) 2 3
Input Wire Size 8-14 AWG 8-14 AWG
Output Wire Size 8-14 AWG 8-14 AWG
Earth Ground Terminals 2 Ea, 8-14 AWG 2 Ea, 8-14 AWG
Max Voltage Rating 600 Vdc 600 Vdc
Max Current Per Circuit 30 Amps 30 Amps
Note: This box will provide a fused pass through connection for the Positive PV side of your circuit. The Negitive circuit does not enter this box.

Note: Continued product improvements make specifications subject to change without notice.