Schneider G12T3A40 | Circuit breaker, GoPact MCCB 125, 3 poles, 10kA at 415VAC, 40A rating, TMD trip unit, adjustable thermal protection

1. Technical Specifications G12T3A40

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

2. Model Number:
   G12T3A40

3. Product Series:
   GoPact MCCB 125

4. Number of Poles:
   3 Poles

5. Rated Current (In):
   40 A

6. Rated Operating Voltage (Ue):
   Up to 415 VAC, 50/60 Hz

7. Breaking Capacity (Icu):
   10 kA at 415 VAC (IEC 60947-2)

8. Trip Unit Type:
   TMD (Thermal Magnetic)

9. Thermal Protection:
   Adjustable — enables custom overload settings for system optimization

10. Magnetic Protection:
    Fixed — for immediate short-circuit response

11. Mounting Type:
    Fixed mounting in distribution boards or control panels

12. Connection Terminals:
    Standard screw-type terminals for easy wiring

13. Operating Temperature Range:
    -25°C to +70°C

14. Ingress Protection:
    IP20 (with front cover), higher when installed in an enclosure with accessories

15. Compliance & Certifications:

• IEC 60947-2

• CE Marked

• RoHS & REACh Compliant

2. Key Features G12T3A40

1. Customizable Thermal Protection:
   Thermal trip settings can be adjusted to match the protection needs of various loads, improving energy safety.

2. Fast Short-Circuit Response:
   The magnetic trip unit instantly disconnects the circuit in short-circuit events, preventing equipment damage.

3. Durable and Compact Design:
   Space-saving construction suitable for confined panel spaces while maintaining rugged durability.

4. Quick and Flexible Installation:
   Designed for fast and secure mounting with minimal tools and configuration.

5. Enhanced System Safety:
   Integrated insulation and IP20 rating at terminals protect users and equipment during maintenance.

6. Long Operational Life:
   Mechanically robust with a long service life in demanding electrical environments.

7. Accessory Compatibility:
   Works seamlessly with GoPact accessories such as rotary handles (direct/extended), auxiliary contacts, and trip alarms.

8. Stable Tripping Performance:
   Maintains accurate and reliable operation across various temperature ranges and load types.

9. Cost-Effective Solution:
   Provides high-level protection at a competitive price for general-purpose low-voltage applications.

10. Versatile for Global Use:
    Compliant with international standards and compatible with a wide range of system voltages and frequencies.

3. Typical Applications G12T3A40

1. Power Distribution Boards:
   Ideal for branch circuit protection in commercial, industrial, and residential installations.

2. Control and Automation Panels:
   Protects sensitive control systems, sensors, and logic devices from overloads and faults.

3. Industrial Machinery:
   Used in machine panels to safeguard internal circuits and auxiliary systems.

4. Motor Circuits:
   Provides primary protection for small motors and motor starters in light industrial processes.

5. Renewable Energy Systems:
   Applied in AC output protection for solar, wind, and hybrid energy solutions.

6. Public Infrastructure Panels:
   Suitable for lighting, pump, or HVAC control panels in public sector projects.

7. Data Centers & IT Facilities:
   Ensures safe and reliable power protection for servers, routers, and network devices.

8. OEM Applications:
   Frequently used by equipment manufacturers in standardized enclosures and compact systems.