The C-curve tripping characteristic means it holds up to 5–10× rated current before instantaneous trip — suited for circuits with moderate inrush, like motor starters and small transformers, not for pure resistive loads where a B-curve would be tighter. Rated 400 V AC and 60 V DC, with a breaking capacity of 10 kA per EN 60898 and 15 kA per IEC 60947-2. The higher IEC figure means it can handle fault currents up to 15 kA in industrial installations where the standard is applied — a real advantage if the panel sits close to a large transformer with high prospective short-circuit current. Insulation voltage (Ui) is 440 V AC, so the breaker is rated for 400 V systems with margin. Overvoltage category 3 and pollution degree 3 confirm it's built for fixed installations in a typical industrial environment, not just clean residential panels.
Siemens 5SJ4306-7HG42 SENTRON MCB, 3P, C-Curve, 10kA EN 6089
Siemens SENTRON 5SJ4306-7HG42, 3-pole miniature circuit breaker, C-tripping characteristic, 10 kA per EN 60898, 15 kA per IEC 60947-2, rated 400 V AC / 60 V DC, 3 modular width units, snap-on DIN rail mounting.
Specifications
| Parameter | Value |
|---|---|
| Overvoltage category | 3 |
| Parameter | Value |
|---|---|
| Width | 54 mm |
| Height | 121 mm |
| Depth | 70 mm |
Product details
Frequently asked questions
Where can I buy 5SJ4306-7HG42 and get a price?
This part is sourced to order against an RFQ through independent distribution. Submit a quote request for current pricing and availability — no stock figures or lead-time numbers are published here.
What are the key electrical ratings for 5SJ4306-7HG42?
Rated 400 V AC / 60 V DC, 3-pole, C-curve. Breaking capacity: 10 kA per EN 60898, 15 kA per IEC 60947-2. Insulation voltage 440 V AC.
Will 5SJ4306-7HG42 drop into a panel designed for 5SY4140-7?
Both are 3-pole MCBs on standard DIN rail with the same 54 mm width (3 modular units). The 5SJ4 series uses combined terminals top and bottom; the 5SY series may differ in terminal design and breaking capacity. Check the terminal type and required interrupting rating before substituting — the physical rail fit is the same, but the wiring and fault ratings need verification against the panel schedule.