Siemens 3VA4170-6ED34-0AA0 Molded Case Circuit Breaker

The rated current is 70A. Select it using the circuit's calculated load and conductor ampacity, including applicable continuous-load requirements, rather than treating 70A as the allowable load for every installation.

The voltage ratings are 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC and 250VDC. Match the rating to the circuit voltage and system configuration. The Y ratings refer to wye systems, with line-to-line voltage before the slash and line-to-neutral voltage after it.

The interrupting ratings are 65kAIC at 480Y/277VAC and 25kAIC at 600Y/347VAC. Compare the available fault current at the installation point with the interrupting rating for the applicable voltage; the available fault current must not exceed that rating.

Both the thermal and magnetic trip settings are fixed. The thermal-magnetic LI trip provides long-time overload protection and instantaneous short-circuit protection. Choose this breaker when fixed settings meet the circuit's protection requirements.

The load-side lug has a conductor range of 14 AWG through 3/0 AWG. Use that range to check terminal acceptance, then select conductor size according to the circuit load and applicable ampacity requirements.

Yes, this breaker has a reverse-feed feature. That permits a circuit arrangement with power entering from the side normally used as the load side, giving you flexibility in feed direction.

The HACR rating applies to heating, air-conditioning and refrigeration applications. Use it when the equipment calls for HACR-rated circuit protection, and select the breaker current rating according to the equipment's overcurrent-protection requirements.

Three poles provide overcurrent protection for three circuit conductors. Base selection on the required pole count together with the circuit current, operating voltage and available fault current.