That AC-1 rating means it's sized for switching heater banks, lighting, or other non-inductive loads — not for motor starting, which would need an AC-3 rating. The 48 V coil is a common control voltage in older panels and some industrial machine centres. Mounts on DIN rail or a backplate, with a 56 mm width that takes up three standard 18 mm module spaces on the rail. The IP2X finger-safe front cover keeps live terminals out of reach during panel access.
The 55 A AC-1 rating governs the resistive load it can switch continuously. For a panel builder, that's the number to match against the heater or lighting bank full-load amps — not the motor FLA. The contact configuration is 2NO+2NC, giving flexibility for both main load switching and auxiliary interlocking without an extra block. Standards compliance covers EN/IEC 60947-4-1 (contactors and motor-starters) and GB/T equivalents, so it's accepted in both European and Chinese industrial installations.