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SCHNEIDER IEC

Schneider Electric is a multinational corporation with origins in France, established in the 19th century and now a major player in energy management and industrial automation. The IEC supplementary protectors offered by 3G Electric under the SCHNEIDER brand are part of the C60SP series, designed for DIN rail mounting and compliant with UL1077 standards. These devices are intended for supplementary overcurrent protection in branch circuits, typically used in control panels, HVAC equipment, and industrial machinery where space is constrained and reliable protection is required. The D-curve characteristic provides a higher magnetic trip threshold (10 to 20 times the rated current), making them suitable for loads with high inrush currents such as motors, transformers, and solenoid valves. The product range available from 3G Electric includes 2-pole models with current ratings from 1 A to 40 A, all featuring screw clamp terminals for secure wiring. The interrupting capacity is rated at 14 kA at 240 V AC for most models, with the 40 A variant rated at 10 kA at 240 V AC. The voltage rating extends to 240/415/440 V AC, accommodating various single-phase and three-phase applications. These protectors are built to withstand industrial environments, with a compact design that fits standard 35 mm DIN rails. 3G Electric stocks these units to support maintenance and new installations in facilities that require standardized, globally sourced components. The supplementary protectors are not intended to replace main circuit breakers but serve as additional protection for specific equipment, reducing downtime by isolating faults at the device level. The screw clamp connection simplifies installation and maintenance, allowing for secure terminations without special tools. The D-curve ensures that nuisance tripping is minimized in circuits with transient surges, while still providing adequate short-circuit protection. These units are suitable for use in panel boards, motor control centers, and distribution boards where space is at a premium. 3G Electric provides these products as part of a broader catalog of industrial electrical components, ensuring that engineers and procurement specialists can source consistent, specification-compliant parts for global operations.

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About SCHNEIDER IEC

Schneider Electric is a multinational corporation with origins in France, established in the 19th century and now a major player in energy management and industrial automation. The IEC supplementary protectors offered by 3G Electric under the SCHNEIDER brand are part of the C60SP series, designed for DIN rail mounting and compliant with UL1077 standards. These devices are intended for supplementary overcurrent protection in branch circuits, typically used in control panels, HVAC equipment, and industrial machinery where space is constrained and reliable protection is required. The D-curve characteristic provides a higher magnetic trip threshold (10 to 20 times the rated current), making them suitable for loads with high inrush currents such as motors, transformers, and solenoid valves. The product range available from 3G Electric includes 2-pole models with current ratings from 1 A to 40 A, all featuring screw clamp terminals for secure wiring. The interrupting capacity is rated at 14 kA at 240 V AC for most models, with the 40 A variant rated at 10 kA at 240 V AC. The voltage rating extends to 240/415/440 V AC, accommodating various single-phase and three-phase applications. These protectors are built to withstand industrial environments, with a compact design that fits standard 35 mm DIN rails. 3G Electric stocks these units to support maintenance and new installations in facilities that require standardized, globally sourced components. The supplementary protectors are not intended to replace main circuit breakers but serve as additional protection for specific equipment, reducing downtime by isolating faults at the device level. The screw clamp connection simplifies installation and maintenance, allowing for secure terminations without special tools. The D-curve ensures that nuisance tripping is minimized in circuits with transient surges, while still providing adequate short-circuit protection. These units are suitable for use in panel boards, motor control centers, and distribution boards where space is at a premium. 3G Electric provides these products as part of a broader catalog of industrial electrical components, ensuring that engineers and procurement specialists can source consistent, specification-compliant parts for global operations.

Common Applications

  • Motor control centers — SCHNEIDER IEC C60SP D-curve protectors for motor branch circuit supplementary protection
  • HVAC equipment — 2-pole supplementary protectors for compressor and fan motor circuits in commercial units
  • Industrial panel boards — DIN rail-mount protectors for control transformers and solenoid valve circuits
  • Machine tool control — Supplementary overcurrent protection for PLC power supplies and relay panels
  • Lighting control systems — D-curve protectors for high-intensity discharge lamp ballasts with high inrush
  • Process automation — 6 A to 40 A protectors for conveyor motor starters and pump control circuits

Frequently asked questions

Common questions about SCHNEIDER IEC from 3G Electric.

What is the difference between a UL1077 supplementary protector and a UL489 circuit breaker for SCHNEIDER IEC products?

UL1077 supplementary protectors, such as the SCHNEIDER C60SP series, are designed for use in circuits that already have a UL489 listed branch circuit overcurrent protective device. They provide additional protection for specific equipment or loads, and are not intended to replace the main branch circuit protection. UL489 circuit breakers are listed for use as primary overcurrent protection in branch circuits. The SCHNEIDER IEC supplementary protectors are suitable for applications where space and cost constraints require a compact device, but they must be installed downstream of a UL489 breaker.

What does the D-curve mean on SCHNEIDER IEC supplementary protectors?

The D-curve on SCHNEIDER IEC supplementary protectors indicates a magnetic trip threshold of 10 to 20 times the rated current (In). This characteristic is designed for loads with high inrush currents, such as motors, transformers, and inductive loads. For example, a 6 A D-curve protector will trip magnetically between 60 A and 120 A. This reduces nuisance tripping during startup while still providing short-circuit protection. The thermal trip element handles overloads, while the magnetic element responds to short circuits.

Can SCHNEIDER IEC supplementary protectors be used in three-phase applications?

Yes, the SCHNEIDER IEC supplementary protectors available from 3G Electric are 2-pole models rated for voltages up to 440 V AC. They can be used in single-phase or three-phase applications by combining multiple units. For three-phase loads, three 2-pole protectors or a combination of single-pole units can be used, provided the voltage rating matches the line-to-line voltage. The 240/415/440 V AC rating covers common three-phase systems, including 240 V delta and 415 V star configurations.

What is the interrupting capacity of the SCHNEIDER IEC supplementary protectors?

Most SCHNEIDER IEC supplementary protectors in the C60SP series offered by 3G Electric have an interrupting capacity of 14 kA at 240 V AC. The 40 A model (SKU 482L81) has a lower interrupting capacity of 10 kA at 240 V AC. This rating indicates the maximum fault current the device can safely interrupt without damage. For systems with higher available fault currents, additional upstream protection may be required to ensure the protector operates within its rated capacity.

Are SCHNEIDER IEC supplementary protectors suitable for DC applications?

The SCHNEIDER IEC supplementary protectors listed in the 3G Electric catalog are specified for AC voltages only, with ratings up to 440 V AC. They are not rated for DC applications. For DC circuits, Schneider Electric offers specific DC-rated supplementary protectors or miniature circuit breakers. Using AC-rated protectors in DC circuits can result in inadequate arc extinguishing and potential failure. Always verify the voltage type and rating before installation.

Does 3G Electric supply SCHNEIDER IEC products?

Yes — 3G Electric (S) Pte. Ltd. supplies SCHNEIDER IEC products. We stock the SCHNEIDER IEC catalog and supply genuine factory-original products with full manufacturer warranty and technical support.