S203MR-K20

Name: S203MR-K20
Brand: ABB
SKU: S203MR-K20

The ABB S203MR-K20 is a high-performance, 3-pole mini circuit breaker rated for 20 amps, meeting UL 1077 standards. It offers reliable protection and efficient operation in various electrical applications.

Product ModelS203MR-K20

Material Number2CDS273437R0487

Product ID78128

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. High PerformanceThe ABB S203MR-K20 is engineered to provide exceptional performance, ensuring reliable operation and efficient protection in electrical systems.
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2. Compliance with UL 1077This circuit breaker meets the stringent standards of UL 1077, ensuring it is safe and reliable for use in a wide range of applications.
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3. 3-Pole DesignThe 3-pole design allows for versatile installation options, making it suitable for various electrical configurations and applications.
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4. 20 Amp RatingWith a rating of 20 amps, this circuit breaker is perfect for applications requiring moderate to high current handling, such as commercial and industrial settings.
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Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Standards

CSA 22.2 No. 235 IEC/EN 60947-2 UL 1077

Tripping Characteristic

Rated Operational Voltage

acc. to IEC 60898-1 400 V AC acc. to IEC 60898-1 400 V acc. to IEC 60947-2 400 V AC

Rated Insulation Voltage (Ui)

acc. to IEC/EN 60664-1 440 V

Rated Impulse Withstand Voltage (Uimp)

4 kV at 2000 m 5 kV at Sea Level 6.2 kV

Input Voltage Type

5. Efficient ProtectionThe S203MR-K20 offers efficient protection against short circuits and overcurrents, ensuring the safety of electrical systems and preventing potential damage.

Rated Current (In)

20 A

Rated Short-Circuit Capacity

(230 V AC) 10 kA (400 V AC) 10 kA

Rated Ultimate Short-Circuit Breaking Capacity (Icu)

(230 V AC) 10 kA (400 V AC) 15 kA (400 V) 6 kA

Rated Conditional Short-Circuit Current (Inc)

(230 V) 10 kA (400 V) 10 kA

Rated Service Short-Circuit Breaking Capacity (Ics)

(400 V AC) 11.2 kA

Rated Frequency (f)

50 / 60 Hz

Power Loss

7.5 W at Rated Operating Conditions per Pole 2.5 W

Energy Limiting Class

Number of Protected Poles

Number of Poles

Overvoltage Category

III

Accessories Available

Yes

Connecting Capacity

Flexible with Ferrule 0.75 ... 25 mmÂ² Flexible 0.75 ... 25 mmÂ² Flexible 0.75 ... 25 mmÂ² Rigid 0.75 ... 35 mmÂ² Stranded 0.75 ... 35 mmÂ²

Terminal Type

Double Clamp

Ambient Air Temperature

Operation -25 ... +55 Â°C

Degree of Protection

IP20

Pollution Degree

Interrupting Rating acc. to UL1077

(480Y / 277 V AC) 10 kA

Width in Number of Modular Spacings

3.0

Product Net Width

52.5 mm

Product Net Height

100 mm

Product Net Depth / Length

71 mm

Product Net Weight

0.42 kg

Built-In Depth (t2)

69 mm

ETIM 8

EC000042 - Miniature circuit breaker (MCB)

ETIM 9

EC000042 - Miniature circuit breaker (MCB)

WEEE Category

5. Small Equipment (No External Dimension More Than 50 cm)

WEEE B2C / B2B

Business To Business

CN8

8536 20 10

UNSPSC

39121603

eClass

V11.0 : 27141901

IDEA Granular Category Code (IGCC)

4899 >> Miniature circuit breaker (MCB) screw-in model

Manufacturer ID

2CDS273437R0487