S203-B20

Name: S203-B20
Brand: ABB
SKU: S203-B20

The ABB S203-B20 is a 3-pole, 20A/480V miniature circuit breaker with dual tripping mechanisms for overload and short circuit protection. It meets UL1077 and IEC standards, suitable for DIN rail mounting.

Product ModelS203-B20

Material Number2CDS253001R0205

Product ID79154

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Dual Tripping MechanismsThe ABB S203-B20 features both delayed thermal tripping for overload protection and electromechanical tripping for short circuit protection, ensuring comprehensive safety.
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2. Compliance with International StandardsThis circuit breaker complies with UL1077 and IEC standards, making it suitable for a wide range of applications including residential, commercial, and industrial settings.
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3. DIN Rail MountingDesigned for easy installation on DIN rail, the S203-B20 offers a compact and space-efficient solution for your electrical distribution needs.
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4. Current LimitingAs a current-limiting device, the S203-B20 helps reduce the impact of short circuits by limiting the current flow, thereby minimizing damage to equipment.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Standards

IEC/EN 60898-1 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 60947-2 440 V AC

Operational Voltage

Maximum (Incl. Tolerance) 440 V AC Minimum 12 V AC Minimum 12 V DC

Rated Insulation Voltage (Ui)

acc. to IEC/EN 60664-1 440 V

Rated Impulse Withstand Voltage (Uimp)