The MGN61690 is a 2-pole switch disconnector from the C60NA-DC range, purpose-built for photovoltaic PV array isolation. It carries a DC-21A utilisation category rating — that means it's designed for switching resistive and lightly inductive DC loads, typical of solar string combiner boxes and inverter DC inputs. The rated operational current steps with voltage: 50 A at 300 V DC, 40 A at 400 V DC, 30 A at 500 V DC, and 20 A at 650 V DC. Rated insulation voltage is 1000 V DC, and it meets EN/IEC 60947-3 for isolation suitability.
Lifecycle reality — obsolete, but findable
This part is marked obsolete. If you're planning a new PV array design, look at the current C60NA-DC catalog; the form factor and ratings may have shifted.
Mechanical and mounting
Dimensions: 132.7 mm high, 72 mm wide, 77.4 mm deep. Pollution degree 2.
Performance and durability
Voltage drop varies with current — expect 100 mV at 20 A, climbing to 251 mV at 60 A. Impulse withstand voltage is 6 kV. The toggle control gives positive visual indication of contact position.