Breaking capacity and trip curve — what fits your fault duty
The 5SJ4220-7HG42: Rated 10 kA per EN 60898 and 15 kA per IEC 60947-2 — the higher figure applies when the breaker is used as an industrial circuit breaker under the product standard, not just a domestic MCB. For a panel feeding a machine with a transformer upstream that can deliver 12 kA fault current, the 15 kA rating under IEC 60947-2 gives the headroom; the 10 kA rating is the limit if the installation is declared per EN 60898 only. C-curve characteristic means the magnetic trip operates at 5 to 10 times In — typical for motor and lighting loads with moderate inrush. The 2-pole design (2P) switches both phases simultaneously; neutral conductor switching is not included, so the neutral must be handled separately or via a 4-pole device if isolation is required.
Panel fit — DIN rail, width, and mounting
Occupies 2 modular width units (36 mm wide) on standard 35 mm DIN rail (EN 60715). Depth is 70 mm, height 121 mm — the 70 mm installation depth is the dimension behind the panel cutout, so factor that into enclosure depth when the door is closed.
Environmental and compliance — shop-floor and documentation
Rated IP20 with connected conductors, IP40 in the handle range — sufficient for enclosed panels but not for washdown zones. Ambient temperature range -40 °C to +75 °C, with max 95 % humidity; vibration resistance 50 m/s² at 25 to 150 Hz and 60 m/s² at 35 Hz (4 seconds). Halogen-free and silicon-free construction — important for clean-room or semiconductor fab environments where outgassing from the plastic housing would contaminate optics or process gases. Sealable design allows the installer to lock the toggle in the off position with a padlock. Overvoltage category 3, pollution degree 3 — suitable for fixed installations in industrial environments where transient overvoltages from switching and lightning are expected.
Sourcing and lifecycle — current production, quoted to order
For a BOM freeze or a panel that was originally specified around the 5SY7206-7CC family: the 5SJ4220-7HG42 shares the same 2-pole, C-curve, 10 kA class and the same 2 MW DIN footprint, so it drops into the same panel slot without rewiring. The 5SY series is a different generation with slightly different breaking capacities — confirm the fault level matches your SCCR study before substituting.