Siemens 5SJ4306-7HG42 Miniature Circuit Breaker
Key Specifications — 5SJ4306-7HG42
| Parameter | Value |
|---|---|
| Current Rating | 6A |
| Number of Poles | 3 |
| Voltage Rating | 480Y/277V |
| Trip Characteristic | C-Curve |
| Interrupt Rating | 10kA |
| Mounting Type | DIN Rail |
| Actuator Type | Lever |
| Illumination | None |
| Encapsulation | Bulk |
| Approvals | CCC, CE, CSA, EAC, UL, VDE |
| RoHS Status | Non-compliant |
| Product Status | Active |
Design and Application Trade-offs — 5SJ4 3-Pole 480/277V Series
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C-Curve magnetic trip point: Suits general-purpose loads (lighting, wiring, small motors); moderate inrush tolerance. For high-locked-rotor inductive loads, a D-curve variant may be needed.
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480Y/277V Wye-system voltage: Enables North American commercial 3-phase Wye distribution. Two of the alternates listed operate at 240V max—verify system voltage matches before specifying.
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Bulk packaging: May reduce per-unit cost for large panel builds; lacks individual pocket protection compared to box-packaged alternatives in the same family.
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RoHS non-compliant: EU installations requiring RoHS 2 compliance must look elsewhere; all alternates share this status.
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CCC, CSA, VDE, UL, CE, EAC approvals: Broad multi-standard coverage, but confirm which specific standards apply at the exact system voltage—approval scope can vary by rating tier.
Compare — 5SJ4306-7HG42 and Similar Siemens 5SJ4 MCBs
Readers must qualify alternates independently; similarity scores reflect parametric overlap, not quality or fitness.
| Spec | 5SJ4306-7HG42 | 5SJ4306-7HG41 | 5SJ4306-8HG42 | 5SJ4303-7HG42 |
|---|---|---|---|---|
| Current | 6A | 6A | 6A | 3A |
| Poles | 3 | 3 | 3 | 3 |
| Voltage | 480Y/277V | 240V | 480Y/277V | 480Y/277V |
| Trip | C-Curve | C-Curve | D-Curve | C-Curve |
| Interrupt | 10kA | 14kA | 10kA | 10kA |
| Mount | DIN Rail | DIN Rail | DIN Rail | DIN Rail |
| Package | Bulk | Box | Bulk | Bulk |
| Similarity | — | 1.0 | 1.0 | 1.0 |
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5SJ4306-7HG41: Identical electrical rating; differs in max voltage (240V) and package (Box). Matches where lower system voltage and individual packaging are acceptable.
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5SJ4306-8HG42: Same voltage, poles, and interrupt rating; D-Curve trip characteristic provides faster magnetic tripping—better for inductive loads but potentially nuisance trips on normal inrush.
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5SJ4303-7HG42: Same mechanical and voltage specs; rated current is 3A—useful for lower-amperage branches within the same form factor and DIN mounting.