The Siemens 3VL3720-1TH46-0AA0 is a SENTRON 3VL series molded case circuit breaker rated at 200A with 3-pole configuration and an electronic trip unit (ETU) providing precise overload and short-circuit protection. This Frame Size 3 MCCB delivers 80kA rated ultimate breaking capacity (Icu) at 415V AC with Ics = 100% of Icu, ensuring reliable service continuity. The electronic release (identified by the "T" suffix) features adjustable L (long-delay overload, 0.4–1.0 × In), S (short-delay short-circuit), and I (instantaneous short-circuit) protection settings, making it suitable for selective coordination in complex distribution networks. Rated for operation up to 690V AC with 800V rated insulation voltage and 8kV impulse withstand, the 3VL3720 complies with IEC 60947-2. With approximate dimensions of 105mm (W) × 155mm (H) × 86mm (D) and a weight of ~1.8 kg, it supports fixed or plug-in/draw-out mounting and is compatible with PROFIBUS DP and Modbus TCP communication modules. Typical applications include distribution feeder protection, motor control center (MCC) incoming units, and industrial sub-distribution boards requiring precise electronic protection and selectivity.
FAQ
Q: What is the rated current of the Siemens 3VL3720-1TH46-0AA0?
A: The rated current (In) is 200A. The "20" in the part number indicates the 200A rating.
Q: What type of trip unit does this model use?
A: It uses an Electronic Trip Unit (ETU, designated by the "T" in the part number), typically the ETU45B, with adjustable L/S/I protection settings. The LCD display allows precise current dialing and readout.
Q: What is the breaking capacity of the 3VL3720-1TH46-0AA0?
A: The rated ultimate breaking capacity (Icu) is 80kA at 415V AC. At 690V AC it derates to 10kA. The service breaking capacity (Ics) equals 100% of Icu.
Q: Can the overload setting be adjusted?
A: Yes, the electronic trip unit allows adjustment of the long-delay (L) overload setting typically in the range of 0.4 to 1.0 × In (80A to 200A).
Q: Does the 3VL3720 include auxiliary contacts or shunt trips?
A: The "0AA0" suffix indicates a standard configuration without factory-installed auxiliary contacts or shunt trips. These accessories can be ordered separately (e.g., 3VL9800-... series).
Q: What communication options are supported?
A: The 3VL series is compatible with PROFIBUS DP and Modbus TCP communication modules, though these are not included in the base model and must be added as external accessories.
Q: What are the physical dimensions of this breaker?
A: Approximately 105mm (W) × 155mm (H) × 86mm (D) with a weight of ~1.8 kg. This is for the 3-pole fixed-mount version without additional accessories.
Q: Is this model suitable for use in North America?
A: The 3VL3720-1TH46-0AA0 (ending in 0AA0) is configured for IEC standards. For North American installations, verify UL 489 compliance requirements before deployment.
