Siemens 5SJ4311-8HG42 Miniature Circuit Breaker
Application Context
The 5SJ4311-8HG42 is a DIN rail-mounted, three-pole thermal-magnetic circuit breaker used to protect individual branch circuits in industrial and commercial distribution panels. The lever actuator provides local manual operation and reset. This part sits in the Siemens 5SJ4 family, which uses a standardized footprint and switching mechanism across multiple current ratings and trip characteristics.
Product Specifications
| Parameter | Value |
|---|---|
| Current Rating | 5 A |
| Number of Poles | 3 |
| Mounting | DIN Rail |
| Actuator Type | Lever |
| Illumination | None |
| Product Status | Active |
| RoHS Compliance | Non-compliant |
Agency Coverage
The following approval agencies are listed for the 5SJ4311-8HG42: CCC, CE, CSA, EAC, UL, VDE.
Trip Characteristic and Interrupting Rating
The part designation carries the "D-TRI" suffix, indicating a D-curve trip characteristic. The "10K" in the catalog title refers to a 10 kA interrupting rating. The title "480/277" denotes the voltage system compatibility for three-pole protection: 480 V AC for three-phase circuits and 277 V AC for single-phase line-to-neutral branch protection.
In-Catalog Comparison (5 A, D-Curve, 480/277 V Series)
This comparison includes other 5SJ4 devices sharing the same voltage class and trip curve. All listed parts require reader qualification before use.
| MPN | Current | Poles | Encapsulation | Similarity |
|---|---|---|---|---|
| 5SJ4311-8HG42 | 5 A | 3 | Bulk | Primary |
| 5SJ4311-8HG41 | 5 A | 3 | Box | 1.00 |
Why 5SJ4311-8HG41 is catalog-similar: It shares the same Siemens 5SJ4 series, identical current rating, pole count, and D-curve trip characteristic. The difference lies in encapsulation (Box versus Bulk) and a slightly different voltage listing in the title (240 V). Both share the same lever actuator and DIN rail mounting.
Full 5SJ4 D-Curve Catalog Range
The following catalog entries share the 480/277 V rating and D-curve but differ in current rating:
| MPN | Current | Encapsulation | Approval Agencies |
|---|---|---|---|
| 5SJ4315-8HG42 | 1.6 A | Box | CCC, CE, EAC, UL489, VDE |
| 5SJ4313-8HG42 | 13 A | Box | CCC, CE, EAC, UL489, VDE |
| 5SJ4318-8HG42 | 15 A | Box | CCC, CE, EAC, UL489 |
| 5SJ4316-8HG42 | 16 A | Box | CCC, CE, EAC, UL489 |
| 5SJ4310-8HG42 | 10 A | Box | CCC, CE, EAC, UL489, VDE |
Why these are catalog-similar: All share the 5SJ4 family prefix, three-pole configuration, 480/277 V compatibility, D-curve trip, lever actuator, and DIN rail mounting. They form a parametric series covering 1.6 A through 16 A in the same physical package form.
C-Curve Variants in Same Series
Two catalog entries carry the C-curve designation instead of D-curve:
| MPN | Current | Voltage Class | Encapsulation |
|---|---|---|---|
| 5SJ4311-7HG42 | 5 A | 480/277 V | Bulk |
| 5SJ4311-7HG41 | 5 A | 240 V | Box |
Why they are catalog-similar: Both are 5SJ4 series, three-pole, 5 A rated, and share the same physical form. The C-curve (7-series) activates the magnetic trip at approximately 5–10 times nominal current, providing faster response than the D-curve (8-series) used in the primary part. Agency listings also differ slightly by voltage class.