Siemens 3VL5763-1DC36-0AA0 Molded Case Circuit Breaker
The Siemens 3VL5763-1DC36-0AA0 is a high-performance molded case circuit breaker (MCCB) from the 3VL5 series. It is designed for main switchgear, motor protection, and feeder circuits up to 630 A. The fixed thermal-magnetic trip unit ensures reliable overcurrent and short-circuit protection.
Electrical Specifications
Rated current (In): 630 A at 40°C ambient. Number of poles: 3. Rated insulation voltage (Ui): 800 V AC. Rated impulse withstand voltage (Uimp): 8 kV. Breaking capacity (Icu) at 415 V AC: 50 kA (Icu = 100% of Ics). Utilization category: A (no short-time delay). Rated frequency: 50/60 Hz.
Trip Unit Features
The ETU (Electronic Trip Unit) offers adjustable overload protection (Ir: 0.7 to 1.0 x In) with a time delay class of 10s at 6x Ir. Short-circuit protection (Ii) is fixed at 10 x In (±20%). An instantaneous magnetic trip operates at 15 x In for high fault currents. The trip mechanism is sealed to prevent tampering.
Mechanical Design and Mounting
This breaker features a compact molded housing made of glass-fiber reinforced polyamide (UL94 V-0). Dimensions (W x H x D): 140 mm x 257 mm x 110 mm. Standard mounting is on a DIN rail (EN 60715) or via four M5 screws on the backplate. Terminal type: box lug connectors accepting copper cables up to 2x 185 mm². The toggle handle indicates ON/OFF/TRIPPED positions with a red/green flag.
Accessories and Interlocks
The 3VL5763-1DC36-0AA0 accepts rotary handle operators (door coupling), shunt trip (24 V DC or 230 V AC), undervoltage release, and auxiliary contacts (1NO+1NC). Key interlocks prevent unauthorized closing. The breaker is compatible with Siemens SENTRON power monitoring systems via a plug-in communication module.
Standards and Certifications
Certified to IEC 60947-2, EN 60947-2, and UL 489 (for specific variants). CCC and CE marked. Operating temperature: -25°C to +70°C. Storage temperature: -40°C to +85°C. The unit withstands vibration according to IEC 60068-2-6 (2 g at 10–150 Hz).
