What this 2 A D-curve MCB is for
It is designed for mechanical engineering and industrial panel applications.
Breaking capacity and approvals
For UL 1077 and CSA C22.2 No. 235 the rating is 5 kA; if the installation requires UL listing, that 5 kA figure governs the maximum available fault current. Overvoltage category III confirms it is rated for fixed-installation distribution boards, not just downstream equipment.
Thermal derating and ambient range
The 2 A rating holds at 35 °C ambient. Above that, derate: 1.85 A at 40 °C, 1.78 A at 45 °C, 1.69 A at 50 °C, 1.61 A at 55 °C (–).
Width is 18 mm — one modular unit. Supply feed can enter from either top or bottom.