The Schneider Electric A9N61654 is a C60PV-DC miniature circuit breaker rated 2 A with a C tripping curve, 2-pole, designed for DC networks up to 800 V DC. It carries a breaking capacity of 3 kA Icu at 650 V DC and 1.5 kA Icu at 800 V DC, certified to EN/IEC 60947-2. The part is polarity-insensitive, meaning it can protect against bi-directional current — a key feature for PV strings where reverse current is possible.
The 3 kA / 1.5 kA breaking capacity at 650 V / 800 V DC tells you the maximum fault current it can safely interrupt — if your array's short-circuit current exceeds that, you need a higher-rated breaker upstream. The 1000 V DC insulation voltage (Ui) confirms the internal clearance is rated for the full system voltage.
This MCB is made for DC circuits in small commercial and residential solar PV arrays, battery banks, or DC distribution panels. The tunnel terminals accept 1...25 mm² rigid or 1...16 mm² flexible wire; strip length is 14 mm, torque to 2.5 N·m. The white housing and toggle control make it easy to identify and operate in a crowded panel.