Siemens HEB3B015B Molded Case Circuit Breaker

This breaker is compatible with Siemens P1, P2, P3, P4, and P5 series panelboards. As a bolt-on unit, your panelboard interior must be configured to accept NEB or HEB frame breakers.

The included lugs accept copper wire ranging from 14 AWG to 1/0 AWG and aluminum wire from 12 AWG to 1/0 AWG. Verify your conductor size matches the 15-amp load requirements and properly torque all connections during installation.

The slash rating of 600Y/347VAC indicates the breaker is certified only for solidly grounded wye systems where the line-to-ground voltage does not exceed 347V. It is not rated for use on 600V ungrounded or corner-grounded delta systems.

No, the HEB3B015B has a fixed thermal and fixed magnetic trip unit. Both the long-time overload and instantaneous short-circuit protection thresholds are factory-calibrated for a 15-amp continuous load and cannot be field modified.

Yes, this Sentron series breaker carries a direct current rating of 42kAIC at 250VDC. When applying a 3-pole breaker in a DC circuit, ensure you follow the manufacturer guidelines for series wiring the poles if required by your specific system voltage.

NEB and HEB frame breakers have the same physical dimensions and panelboard compatibility. However, the HEB series has a significantly higher interrupting rating. You can safely replace an NEB with an HEB, but you should only replace an HEB with an NEB if a fault current analysis confirms the lower AIC rating is adequate for your system.

The LI designation means the breaker provides Long-Time and Instantaneous protection. The long-time thermal element trips on sustained overloads to prevent wire overheating, while the instantaneous magnetic element trips without intentional delay to clear severe short circuits.