ABB 2CDS283001R0577 S203P-K50 3-Pole 50A K-Curve Miniature Circuit Breaker

The S203P-K50 is a three-pole circuit breaker with a rated current of 50 A and a K tripping characteristic. ABB product documentation identifies the corresponding order number as 2CDS283001R0577 and the product type as S203P-K50. :contentReference[oaicite:1]{index=1}

Product Identification

• Manufacturer: ABB
• Part Number: 2CDS283001R0577
• Product Type: S203P-K50
• Product Family: S200P
• Product Type: Miniature Circuit Breaker
• Number of Poles: 3
• Protected Poles: 3
• Rated Current: 50 A
• Tripping Characteristic: K
• Rated Voltage: 230/400 V AC
• Rated Frequency: 50/60 Hz
• Mounting: DIN Rail
• Protection Rating: IP20
• Rated Insulation Voltage: 440 V
• Rated Impulse Withstand Voltage: 4 kV

ABB S203P-K50 Overview

ABB 2CDS283001R0577 is configured as a three-pole S203P miniature circuit breaker. The S200P range provides circuit protection for electrical installations where the selected current rating, tripping characteristic and breaking capacity match the requirements of the application.

The S203P-K50 configuration is specifically rated at 50 A and uses a K tripping characteristic. Product data identifies the device as a three-pole MCB with a 52.5 mm product width, 88 mm height and 69 mm depth. :contentReference[oaicite:2]{index=2}

Three-Pole Configuration

ABB 2CDS283001R0577 has three poles, with all three poles protected by the circuit breaker. This configuration is intended for three-phase electrical circuits where coordinated protection and switching of the three conductors is required.

The three-pole construction allows the circuit breaker to occupy three modular positions on a DIN rail. The specified product width is approximately 52.5 mm. :contentReference[oaicite:3]{index=3}

50A Rated Current

The rated current of the ABB S203P-K50 is 50 A. This is the nominal current rating used to define the circuit breaker’s operating characteristics under the specified reference conditions. ABB’s catalog directly lists S203P-K50 with a 50 A rated current and order number 2CDS283001R0577. :contentReference[oaicite:4]{index=4}

The 50 A rating must be coordinated with conductor ampacity, installation conditions, load characteristics and the requirements of the electrical system. A circuit breaker should not be selected solely from the nominal load current.

K Tripping Characteristic

ABB 2CDS283001R0577 uses a K tripping characteristic. The K characteristic is intended for applications where the circuit may experience higher starting or inrush currents while still requiring defined overcurrent protection.

The K characteristic distinguishes the S203P-K50 from B-, C- and D-characteristic versions of ABB miniature circuit breakers. The complete product designation should therefore be checked when selecting a replacement.

The K characteristic is documented for the S203P-K50 product. :contentReference[oaicite:5]{index=5}

230/400V AC Electrical Rating

The S203P-K50 is specified for electrical systems including 230/400 V AC. Product information also identifies AC/DC operating configurations under the applicable conditions. :contentReference[oaicite:6]{index=6}

When applying the circuit breaker, the actual system voltage, phase configuration and applicable installation requirements should be verified against the technical documentation.

Short-Circuit Protection

ABB 2CDS283001R0577 provides protection against short-circuit conditions through its thermal-magnetic tripping system.

Technical product data specifies an ultimate short-circuit breaking capacity of 15 kA at 400 V AC according to IEC/EN 60947-2. At 230 V AC, the corresponding Icu value is listed as 25 kA. :contentReference[oaicite:7]{index=7}

Under IEC/EN 60898-1, the published Icn value is listed as 12.5 kA at both 230 V and 400 V in the referenced product data. :contentReference[oaicite:8]{index=8}

The applicable breaking-capacity value depends on the standard, system voltage and installation conditions. The prospective short-circuit current should therefore be evaluated before selecting the device.

Thermal Overload Protection

The thermal portion of the circuit breaker responds to sustained overcurrent conditions. When current exceeds the appropriate operating level for a sufficient period, the thermal mechanism trips the circuit and interrupts the protected load.

This function is intended to protect conductors and connected equipment against prolonged overload conditions.

Magnetic Short-Circuit Protection

The magnetic portion of the S203P-K50 provides rapid response to high fault currents. This mechanism operates in the instantaneous tripping region associated with short-circuit events.

The combination of thermal and magnetic protection provides two complementary forms of overcurrent protection within the same miniature circuit breaker.

DIN-Rail Mounting

ABB 2CDS283001R0577 is designed for mounting on standard DIN rails. The documented mounting options include TH35-7.5 and TH35-15 rails in accordance with IEC 60715. :contentReference[oaicite:9]{index=9}

This mounting arrangement allows the S203P-K50 to be integrated into modular distribution boards, industrial control cabinets and low-voltage switchgear assemblies.

Terminal Connections

The S203P-K50 uses screw terminals. Product information specifies a tightening torque of approximately 2.8 N·m. :contentReference[oaicite:10]{index=10}

The appropriate conductor type and cross-section should be selected according to the installation design and ABB technical requirements. Proper terminal tightening is important for maintaining the electrical connection during operation.

Protection Rating

ABB 2CDS283001R0577 has an IP20 degree of protection. :contentReference[oaicite:11]{index=11}

When installed in a suitable electrical enclosure, additional enclosure-level protection can be provided according to the requirements of the installation environment.

Operating Temperature

The documented ambient operating temperature range for the S203P-K50 is approximately -25°C to +55°C, with a storage temperature range of approximately -40°C to +70°C. :contentReference[oaicite:12]{index=12}

The installation environment should remain within the specified temperature limits, particularly when the circuit breaker is installed inside a densely populated control cabinet.

Electrical Characteristics

The rated insulation voltage of the S203P-K50 is 440 V according to IEC/EN 60664-1. Its rated impulse withstand voltage is specified as 4 kV under the applicable conditions. :contentReference[oaicite:13]{index=13}

The device is identified with overvoltage category III and pollution degree 3 in the referenced product information. :contentReference[oaicite:14]{index=14}

Power Loss

The product data specifies approximately 9 W total power loss at rated operating conditions, corresponding to approximately 3 W per pole. :contentReference[oaicite:15]{index=15}

Power loss should be considered when determining cabinet thermal conditions, especially when multiple protective devices are installed together.

Mechanical Dimensions

ABB 2CDS283001R0577 has a compact modular form factor suitable for DIN-rail assemblies.

• Width: Approximately 52.5 mm
• Height: Approximately 88 mm
• Depth: Approximately 69 mm
• Weight: Approximately 0.42 kg
• Number of Modules: 3

These dimensions are documented for the S203P-K50 configuration. :contentReference[oaicite:16]{index=16}

Standards

ABB documentation identifies the S200P product family with standards including IEC/EN 60898-1, IEC/EN 60947-2 and UL 1077. Product information for the S203P-K50 also lists CSA 22.2 No. 235. :contentReference[oaicite:17]{index=17}

The applicable standard should be determined according to the electrical installation, jurisdiction and intended use.

Application Areas

ABB 2CDS283001R0577 can be applied in low-voltage electrical systems requiring a three-pole, 50 A miniature circuit breaker with a K tripping characteristic.

Potential applications include industrial distribution systems, control cabinets, machine electrical systems, motor-related circuits and other installations where the electrical characteristics of the S203P-K50 correspond to the circuit requirements.

Industrial Control Cabinets

In industrial control cabinets, the S203P-K50 can be used as a protective device for appropriately designed three-phase circuits.

Its three-pole construction provides coordinated switching and protection across the three protected poles. The K characteristic can be useful in circuits where the connected load produces higher starting currents, provided that the complete protection design is compatible.

Three-Phase Distribution

The three-pole configuration makes ABB S203P-K50 suitable for three-phase distribution applications where a 50 A protective device is required.

The circuit breaker should be coordinated with upstream and downstream protective devices to achieve the required protection and selectivity characteristics.

Technical Specification Summary

S200P Product Family

ABB 2CDS283001R0577 belongs to the S200P range of miniature circuit breakers. The ABB catalog lists the S203P-K family in multiple current ratings, including 32 A, 40 A, 50 A and 63 A. The corresponding 50 A model is identified as S203P-K50 with order number 2CDS283001R0577. :contentReference[oaicite:18]{index=18}

This makes the complete part number important when distinguishing the S203P-K50 from other S203P variants with different current ratings.

Product Identification and Ordering

The primary ABB identification number is 2CDS283001R0577, while the associated product designation is S203P-K50. Both identifiers can be used when searching technical documentation and maintaining industrial inventory records. :contentReference[oaicite:19]{index=19}

The referenced product data also lists EAN 4016779597562. :contentReference[oaicite:20]{index=20}

Compatibility Verification

Before selecting ABB 2CDS283001R0577 for an installation or replacement application, verify the following parameters:

• ABB part number: 2CDS283001R0577
• Product type: S203P-K50
• Three-pole configuration
• Rated current: 50 A
• Tripping characteristic: K
• Rated voltage: 230/400 V AC
• Short-circuit breaking capacity
• DIN-rail mounting requirements
• Terminal requirements
• Conductor cross-section
• Ambient temperature
• Applicable electrical standards

These parameters should be compared with the original circuit breaker and the complete electrical design before selecting a replacement.

Installation Considerations

The S203P-K50 should be installed on a compatible DIN rail and wired according to the applicable ABB installation requirements.

The 50 A rating must be coordinated with the current-carrying capacity of the conductors and the expected load. The K tripping characteristic should also be considered in relation to equipment starting current and transient current conditions.

The prospective short-circuit current at the installation point should be evaluated against the applicable interrupting capacity of the circuit breaker.

Maintenance Considerations

Routine inspection can include checking the mechanical mounting, terminal connections, actuator operation and visible condition of the circuit breaker.

If repeated tripping occurs, the underlying overload or fault condition should be investigated before restoring the circuit to normal operation.

Electrical installation and maintenance should be performed using appropriate isolation procedures and in accordance with applicable electrical safety requirements.

Product Identification for Inventory

For industrial inventory records, the recommended product description is ABB 2CDS283001R0577 S203P-K50 3-Pole 50A K-Curve Miniature Circuit Breaker.

Additional searchable descriptions can include ABB S203P-K50, ABB 2CDS283001R0577 MCB, ABB S200P 50A Circuit Breaker, ABB 3 Pole K50 MCB and ABB DIN Rail 50A K-Curve Circuit Breaker.

The complete part number 2CDS283001R0577 should remain the primary identification reference for product matching and inventory management.

Conclusion

ABB 2CDS283001R0577 is the S203P-K50 three-pole 50 A K-characteristic miniature circuit breaker from the ABB S200P series. It is designed for thermal-magnetic protection of low-voltage electrical circuits.

The device has three protected poles, a 50 A rated current, K tripping characteristic and a 230/400 V AC system rating. Technical data specifies a 15 kA ultimate short-circuit capacity at 400 V AC according to IEC/EN 60947-2 and a 25 kA value at 230 V AC under the same standard. :contentReference[oaicite:21]{index=21}

Its DIN-rail mounting, compact modular construction and three-pole configuration make the S203P-K50 suitable for appropriately designed industrial distribution and control applications.

The recommended technical product name is ABB 2CDS283001R0577 S203P-K50 3-Pole 50A K-Curve Miniature Circuit Breaker. When selecting or replacing this device, the complete ABB part number, pole configuration, rated current, K characteristic, system voltage and required short-circuit capacity should be verified.