What the ratings mean for fit
The 5SP3420-3: E-curve means the magnetic trip operates between 10× and 20× In — designed for transformer inrush or high-inductive loads where a C-curve would nuisance-trip. The 25 kA breaking capacity (per EN 60898) at 400 V gives selectivity headroom downstream; it also carries a 25 kA rating per IEC 60947-2, so it's rated for industrial distribution panels, not just residential. Rated insulation voltage is 690 V, surge voltage resistance 6 kV, overvoltage category IV, pollution degree 3 — that's a main-panel rating, not a sub-feed. Snap it onto 35 mm DIN rail per EN 60715; 6 MW wide (108 mm) leaves room for a 2-pole isolator alongside in a standard 12-MW enclosure. IP40 with connected conductors — fine for a dry indoor panel; not for washdown. Terminal capacity accepts 2.5–50 mm² solid or stranded, saddle terminals included. Lockable via integrated slide (padlock, wire seal, or cable tie).
Lifecycle & sourcing
Lifecycle stage is current — no phase-out notice, no successor assigned. This is a standard catalog item; quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time.