The Siemens 3VT1703-2EC46-0AA0 is a SENTRON 3VT series molded case circuit breaker, Siemens' economic/efficient MCCB line manufactured in accordance with IEC 60947-2 for global markets. This Frame Size 160 model is rated at 63A with a 3-pole configuration and delivers a 36kA rated ultimate breaking capacity (Icu) at 415V AC. The electronic trip unit (ETU), identified by the "E" suffix, provides L (long-delay overload, adjustable 0.4–1.0 × In), S (short-delay short-circuit with adjustable time delay for selectivity), and I (instantaneous short-circuit) protection functions. Rated for operational voltage up to 690V AC with 800V insulation voltage and 8kV impulse withstand, the 3VT1703 features compact dimensions of approximately 105mm (W) × 165mm (H) × 86mm (D), supporting bolt-on terminal connections and DIN rail or direct plate mounting. As part of Siemens' value-line MCCB offering, the 3VT1703 is suitable for distribution feeder protection, motor branch circuit protection, lighting panel boards, and commercial building sub-distribution where cost-effective electronic protection is desired.
FAQ
Q: What is the rated current of the Siemens 3VT1703-2EC46-0AA0?
A: The rated current (In) is 63A. The "C" in the part number's 7th–8th position decodes to the 63A fixed thermal setting.
Q: What type of trip unit does this model use?
A: The "E" suffix indicates a basic Electronic Trip Unit (ETU) providing L (overload), S (short-circuit short delay), and I (instantaneous) protection functions.
Q: What is the breaking capacity of the 3VT1703?
A: The rated ultimate breaking capacity (Icu) is 36kA at 415V AC. Ics equals 100% of Icu for full reliability.
Q: What is the difference between the Siemens 3VT and 3VL series?
A: The 3VT series is Siemens' economic/efficient line of MCCBs, typically manufactured for value-oriented global markets, while the 3VL/3VA series offer higher breaking capacities and more advanced communication options for demanding applications.
Q: What are the physical dimensions of this 63A breaker?
A: Approximately 105mm (W) × 165mm (H) × 86mm (D) for the 3-pole 160 frame size. This is a compact form factor suitable for DIN rail or direct plate mounting.
Q: Can the overload setting be adjusted on this model?
A: Yes, the electronic ETU allows adjustment of the L (long-delay overload) setting, typically from 0.4 to 1.0 × In (approximately 25A to 63A).
Q: Can this breaker be mounted on a DIN rail?
A: Yes, the 3VT1703 160 frame size can be mounted on DIN rails using an adapter, or directly onto mounting plates for standard installation.
Q: What accessories are compatible with the 3VT1703?
A: Compatible accessories include auxiliary switches (e.g., 3VT9300-1A alarm switch, 3VT9300-2A auxiliary switch), shunt trips, and undervoltage releases, ordered separately from the base model.
