Are Eaton BR 2-pole breakers the only breakers approved for use in the IQ Combiner box?

• A. True
• B. False
• C. Not specified
• D. Only for certain models

Answer: (A)

Breakers in an enclosure must be listed for that enclosure to preserve the listing and safety. The IQ Combiner Box is UL-listed for use specifically with Eaton BR 2-pole breakers. That means the internal design, bus, mounting, and clearance are all matched to that exact breaker family, and using a different brand or a different pole count would void the listing and could lead to poor contact, overheating, or improper tripping. The two-pole design also ensures both hot legs can be disconnected together, which is important for safely isolating the circuit in PV system wiring. So Eaton BR 2-pole breakers are the only breakers approved for use in the IQ Combiner Box.