Siemens SENTRON 5SY4301-5, 3-pole miniature circuit breaker, 400 V AC, characteristic A, 10 kA (EN 60898) / 35 kA (IEC 60947-2) breaking capacity, 3 MW wide.
| Parameter | Value |
|---|---|
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Width | 54 mm |
| Height | 90 mm |
| Depth | 76 mm |
The 5SY4301-5: Under UL 1077 it is rated 5 kA.
The breaker is rated 400 V AC for multi-phase operation and 440 V AC for single-phase; DC rating is 60 V (72 V max) with 15 kA breaking capacity.
The sealable option (padlockable toggle) allows positive lockout per LOTO procedure. If the panel is tight on width, note that three poles at 54 mm is the standard footprint — no width surprise.
Engineers need to validate fit (ratings, curve, dimensions) before design-in.
Buyers compare costs for BOM pricing and budget approval.
Sourcing buyers need immediate stock to avoid production delays.
Maintenance techs and brokers need alternative when part is unavailable or obsolete.
Design engineers must ensure the MCB can interrupt fault currents safely.
Techs need to confirm if it can be used in DC circuits (rated at 60V DC).
Alternative models and sibling configurations in the same Siemens series. For obsolete or discontinued parts, these models can serve as compatible replacements or functional alternatives for plant maintenance.
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