Siemens 3VA4170-5ED34-0AA0 Molded Case Circuit Breaker

The Siemens 3VA4170-5ED34-0AA0 is a 3-pole, 70A molded case circuit breaker for three-phase circuits. Use the 70A rating when coordinating circuit load and conductor protection, and check the voltage and interrupting ratings for the installation.

Compare available fault current with the rating at your circuit voltage: UL 85kA at 240VAC, UL 35kA at 480Y/277VAC, and UL 18kA at 600Y/347VAC. The interrupting rating must be at least the available fault current at the installation point.

It is rated for 250VDC with a UL interrupting rating of 85kA at that voltage. For DC selection, check both circuit voltage and available fault current against those DC ratings rather than using the AC ratings.

No. The thermal and magnetic trip settings are fixed. The thermal-magnetic LI trip provides long-time overload and instantaneous short-circuit protection, so select it when fixed trip settings meet the circuit's protection requirements.

The load-side lug accepts copper or aluminum conductors from 8 AWG through 3/0 AWG. Select a conductor within that range, with ampacity appropriate for the circuit; lug acceptance alone does not determine conductor ampacity.

The body measures 5.09 in high, 3 in wide and 2.96 in deep. Use these dimensions when planning the physical layout, while accounting separately for conductor routing and termination space.

The operating temperature range is -25C to 70C. Check expected temperatures at the breaker location against this range when evaluating the installation environment.

HACR refers to heating, air conditioning, and refrigeration. This rating is relevant when selecting protection for those equipment circuits; check the equipment's required breaker rating along with circuit voltage and available fault current.