The B-curve trips between 3 and 5 times rated current — 189 A to 315 A for this 63 A breaker — making it the right choice for resistive and general-purpose loads where inrush is modest. Insulation voltage is rated 440 V AC, with multi-phase operation also maxed at 440 V, so it handles standard 400 V three-phase panels with headroom. On the DC side, the 5SJ6263-6 is rated for a maximum of 60 V DC, which covers common 48 V and 24 V DC control circuits but not higher-voltage DC buswork. The 20 000 mechanical switching cycles typical service life is adequate for most panel applications where the breaker sees infrequent manual operation; it is not a switching device for cyclic loads. Mounting position is unrestricted, and the breaker is sealable — useful for installations requiring tamper-evident covers. Touch protection is built in, meeting the requirements for finger-safe terminals when conductors are connected. The IP20 rating applies with conductors connected, so the panel enclosure provides the environmental seal.
Environmental and compliance profile
Vibration resistance is tested to IEC 60068-2-6 at 50 m/s² from 25 to 150 Hz and 60 m/s² from 10 to 150 Hz, so it holds up on machinery with moderate vibration. Energy limiting class 3 indicates it restricts let-through energy effectively, which aids downstream component coordination.