ABB S503-K1.5 Miniature Circuit Breaker

We will arrange delivery within 3-5 days after receiving the payment.

Our express delivery: DHL and FedEx.

Quality packing for each product

Destination country all taxes & duty to be paid by buyer

Only part of the brand and model, if you have other product needs, please contact us.

1. Product Overview

The ABB S503-K1.5 is a Miniature Circuit Breaker (MCB) designed for low-voltage distribution systems to protect circuits and equipment from overloads and short circuits.
It features a highly reliable thermal-magnetic trip unit, suitable for residential, commercial, and industrial applications, with easy operation and flexible installation.

2. Main Technical Specifications (Typical)

• Model: S503-K1.5

• Product Type: Miniature Circuit Breaker (MCB)

• Rated Current: 1.5 A

• Poles: Single, Double, or Three-pole options

• Trip Characteristic: K type (suitable for general industrial and commercial loads)

• Rated Operational Voltage: AC 230/400 V

• Short-Circuit Breaking Capacity: 6 kA

• Mounting: DIN rail

• Protection Class: IP20

• Operating Temperature Range: -25 ℃ to +60 ℃

• Width: 17.5 mm per pole

• Enclosure Material: Flame-retardant engineering plastic

3. Key Advantages and Features

1. Reliable Protection

   • Provides overload and short-circuit protection to safeguard circuits

2. Fast Trip Response

   • Thermal-magnetic trip unit reacts quickly to protect equipment

3. Modular Design

   • DIN rail mounting saves panel space

   • Easy to expand and maintain

4. Suitable for Industrial and Residential Use

   • K-type trip characteristic for various load types

   • Complies with IEC/EN 60898 standards

5. Safe Operation

   • Clear ON/OFF handle indication

   • Flame-retardant enclosure enhances safety

4. Typical Applications

• Low-voltage distribution in residential and commercial buildings

• Industrial control systems

• Motor, lighting, and socket circuit protection

• Distribution panels and switchgear

• Power, chemical, mining, and manufacturing industries

5. Installation and Maintenance Notes

1. Rated Current Matching

   • Select rated current according to circuit load

   • Avoid prolonged overload

2. Power-Off Operation

   • Disconnect power before installation, wiring, or maintenance

3. Installation Guidelines

   • DIN rail mounting for secure installation

   • Avoid high temperature, humidity, and dust

4. Periodic Inspection

   • Check breaker status and terminal connections

   • Operate handle periodically to maintain mobility

5. Safety Precautions

   • Do not disassemble under live conditions

   • Ensure personnel safety