Schneider Circuit Breaker IC65N-3P/C20A

1. Core Parameters and Technical Characteristics

Basic Specifications

  Poles: 3P (three poles), suitable for three-phase four-wire power distribution systems, capable of切断 three-phase power simultaneously.

  Rated Current: 20A (under AC-3 duty category, can protect approximately 11kW loads at 400V).

  Tripping Curve: Type C (instantaneous tripping at 5-10 times the rated current), suitable for conventional loads such as lighting and sockets, and can withstand short-term inrush currents (e.g., fluorescent lamp startup).

  Breaking Capacity: 6kA (400V AC), meeting the short-circuit protection requirements of most low-voltage power distribution scenarios.

Electrical Performance

  Rated Operating Voltage: 400V AC, supporting 50/60Hz frequency.

  Current Limiting Class: Class 3, which can quickly limit the rise of short-circuit current and reduce the risk of equipment damage.

  Mechanical Life: 200,000 operations; Electrical Life: 100,000 operations, ensuring long-term stability and reliability.

Environmental Adaptability

  Operating Temperature: -35℃ to +70℃, suitable for harsh industrial environments.

  Moisture and Heat Resistance: Class 2 (55℃, 95% relative humidity), suitable for use in humid areas.

2. Certifications and Standards

Domestic Certification: Passed CCC certification, compliant with GB10963.1 "Overcurrent Protection Circuit Breakers for Household and Similar Premises" standard.

International Certification: CE certified, compliant with IEC 60898-1 "Overcurrent Protection Circuit Breakers for Household and Similar Premises" standard, applicable to global markets.

Isolation Function: The handle displays a green indicator when disconnected, meeting the isolation requirements of IEC 60947-2 to ensure maintenance safety.

3. Application Scenarios

Industrial Automation: Used for short-circuit and overload protection in three-phase motor control circuits, cooperating with contactors to realize motor start-stop control.

Commercial Building Power Distribution: Protection for three-phase lighting systems, air conditioning units, and elevator power supplies in places such as shopping malls and office buildings.

Energy Infrastructure: Protection for output terminals of distributed energy equipment such as photovoltaic inverters and small generators.

Residential Three-Phase Incoming Line: Comprehensive protection of three-phase power for main distribution boxes in high-end residences or small factories.

4. Installation and Wiring

Installation Method: Supports 35mm standard DIN rail mounting, with a width of only 54mm (3 poles), saving distribution box space.

Wiring Specifications

  Main Circuit: Supports 1-25mm² single-strand hard wires or 1-16mm² flexible wires (with terminals), tightening torque is 2.5N·m.

  Terminal Type: Tunnel-type terminal design, anti-misoperation and firm wiring, suitable for quick construction.

5. Model Selection and Alternative Solutions

Same Series Alternatives

  IC65N-3P/D20A: Type D curve (instantaneous tripping at 10-14 times), suitable for impulsive loads such as motors.

  IC65H-3P/C20A: Breaking capacity increased to 10kA, suitable for industrial scenarios with high short-circuit currents.

International Brand Alternatives

  ABB S263-C20: Compatible parameters, similar installation dimensions, breaking capacity 6kA.

  Siemens 5SJ6 320-C20: Type C curve, breaking capacity 6kA, with overload alarm function.

6. Price and Purchase Suggestions

Market Reference Price: Approximately 25-30 yuan for single-pole, 70-90 yuan for 3P model (domestic channels in 2025).

Purchase Channels

  Official Authorized Distributors: Such as Schneider WhatsApp: 0086-13811255435

Precautions

  - For leakage protection, it is necessary to match the Vigi IC65N module (e.g., A9D65232) to achieve 30mA leakage action protection.

  - Derating is required in high-temperature environments (>40℃). It is recommended to consult the technical manual or Schneider engineers.

7. Maintenance and Troubleshooting

Regular Inspection

  - Clean the oxide layer on the contact surface every 6 months to ensure good contact.

  - Check the flexibility of the handle operation to avoid tripping failure caused by mechanical jamming.

Troubleshooting

  Frequent Tripping: May be caused by overload, short circuit, or loose wiring; need to check the load and线路 one by one.

  Contact Ablation: If blackening or adhesion of contacts is found, the circuit breaker must be replaced in time to avoid fire risks.

Based on the above information, IC65N-3P/C20A has become one of the mainstream choices in the low-voltage power distribution field due to its high reliability, flexible expandability, and wide applicability. In practical applications, a comprehensive evaluation based on load characteristics, environmental conditions, and installation space is required to ensure the safe and stable operation of the system.