Schneider G12T3A125 | Circuit breaker, GoPact MCCB 125, 3 poles, 10kA at 415VAC, 125A rating, TMD trip unit, adjustable thermal protection

1. Technical Specifications G12T3A125

1. Product Name:
   Molded Case Circuit Breaker (MCCB)

2. Model Number:
   G12T3A125

3. Product Series:
   GoPact MCCB 125 by Schneider Electric

4. Rated Current (In):
   125 Amperes

5. Number of Poles:
   3 poles – suitable for three-phase systems

6. Breaking Capacity:
   10 kiloamperes (kA) at 415 volts AC

7. Rated Operational Voltage (Ue):
   Up to 415 VAC (AC50/60Hz)

8. Trip Unit Type:
   TMD (Thermal Magnetic Trip Unit)

9. Thermal Protection:
   Adjustable thermal overload protection, enabling fine-tuning based on load requirements

10. Magnetic Protection:
    Fixed magnetic protection for fast reaction to short-circuit faults

11. Mounting Type:
    Fixed – designed for straightforward installation in switchboards or panels

12. Connection Compatibility:
    Cable or busbar terminals

13. Insulation Voltage (Ui):
    690 V AC

14. Pollution Degree:
    Category 3 (industrial-grade durability)

15. Certifications and Standards:

• IEC 60947-2

• CE Certified

• RoHS Compliant

16. Operating Temperature Range:
    -25°C to +70°C (may require derating at higher temperatures)

2. Key Features G12T3A125

1. High Current Protection (125A):
   Ideal for protecting high-load circuits such as feeders or machinery lines.

2. Adjustable Overload Settings:
   Thermal trip current is adjustable to match the installed load and cable capacity, reducing nuisance trips.

3. Quick Short-Circuit Response:
   Fixed magnetic trip protects the system against dangerous fault currents.

4. Compact and Robust Design:
   Space-saving design with durable construction for long-term industrial use.

5. Easy Integration:
   Compatible with GoPact accessories, such as rotary handles, terminal covers, and auxiliary contacts.

6. Reliable Switching Mechanism:
   Designed for high mechanical and electrical endurance with thousands of operations.

7. High Safety Standards:
   Tested and certified to international standards for industrial and commercial applications.

8. Front Access for Installation:
   All terminals and settings are accessible from the front, allowing quick wiring and maintenance.

9. Environmentally Friendly:
   Free from hazardous substances in compliance with RoHS regulations.

10. Wide Application Scope:
    Suitable for a broad range of industrial, commercial, and infrastructure systems.

3. Common Applications G12T3A125

1. Industrial Power Distribution:
   Used to protect and control main feeders and large equipment in manufacturing facilities.

2. Commercial Electrical Panels:
   Suitable for high-current circuits in malls, office buildings, and institutional campuses.

3. Motor Control Centers (MCCs):
   Provides circuit protection for high-power motor systems in heavy-duty environments.

4. Renewable Energy Installations:
   Ensures safety and control in solar inverter panels and hybrid energy systems.

5. Construction Site Boards:
   Offers protection in temporary site distribution panels with varying load demands.

6. Water Treatment and Utility Systems:
   Protects key infrastructure circuits in treatment plants and pumping stations.

7. Data Centers and Server Facilities:
   Used in main distribution units (MDUs) to ensure stable power delivery.

8. OEM and Custom Panels:
   Widely used by panel builders and OEMs in custom-designed power systems.