Mounting and panel fit
The 5SJ4301-8HG42: Three modular widths (54 mm) on a standard DIN rail – same footprint as higher-rated siblings in the 5SJ4 family. Mounting position any, which simplifies layout in crowded panels.
Breaking capacity and duty
Rated 10 kA and 15 kA, D-curve. Designed for mechanical engineering and industry use – suited for panel builders protecting feeder circuits with high inrush components.
Environmental tolerance
Operates from -40 °C to 75 °C, withstanding up to 95 % humidity. Halogen-free and silicon-free construction – fits clean-room or coated-panel requirements without outgassing concerns. IP20 with conductors connected, IP40 in the handle area – suitable for enclosed distribution boards where operator touch points need extra protection.
Sourcing and lifecycle
Current production – no end-of-life or last-time-buy pressure. Genuine Siemens SENTRON, sourced through authorized and cross-border channels. Let me be transparent: this breaker is widely available; we quote against an RFQ for committed BOM lines.