ABB 1SDA066577R1 Molded Case Circuit Breaker

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• • • 1. Product Overview

      The ABB 1SDA066577R1 is a three-pole fixed molded case circuit breaker (MCCB) from the SACE Tmax XT series. It provides overload, short-circuit, and phase imbalance protection in low-voltage distribution systems. Featuring a thermal-magnetic trip unit (TMD), it is suitable for industrial, commercial, and infrastructure applications. Robust and reliable, it is designed for high breaking capacity and long-term operation.

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      2. Technical Specifications

      • Model: 1SDA066577R1

      • Series/Frame: SACE Tmax XT

      • Poles: 3P (Three-pole)

      • Rated Current (In): 100 A (adjustable 70–100 A)

      • Rated Operational Voltage (Ue): up to 690 V AC

      • Rated Insulation Voltage (Ui): 800 V

      • Ultimate Short-Circuit Breaking Capacity (Icu): 36 kA @ 380/415 V AC

      • Maximum Short-Circuit Breaking Capacity: 50 kA @ 220–240 V AC

      • Trip Unit: Thermal-Magnetic (TMD)

      • Mounting: Fixed / Panel / Base

      • Terminals: Bolt / Front connection

      • Mechanical Life: ≥ 10,000 operations

      • Electrical Life: ≥ 4,000 operations

      • Protection Class: IP20

      • Operating Temperature: -25°C ~ +70°C

      • Weight: ~16–18 kg

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      3. Features & Advantages

      1. High breaking capacity — Can withstand short-circuit currents of 36–50 kA for system safety.

      2. Comprehensive protection — Thermal-magnetic trip provides overload, short-circuit, and phase imbalance protection.

      3. Durable construction — Fixed installation design suitable for industrial and high-power systems.

      4. Adjustable current rating — Suitable for various load requirements.

      5. Standards compliant — IEC/EN standards for global applications.

      6. Modular and expandable — Compatible with auxiliary contacts and alarm modules for remote monitoring and signaling.

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      4. Typical Applications

      • Industrial low-voltage distribution panels and systems

      • Motor, pump, fan, and compressor protection

      • Commercial and infrastructure low-voltage distribution

      • Power plants and substations for low-voltage branches

      • Automation production lines and large equipment control cabinets

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      5. Precautions

      • Confirm load current matches the breaker’s rated current before installation.

      • Installation and wiring must be performed with power off.

      • Use protective measures in humid, corrosive, high-vibration, or high-temperature environments.

      • Regularly inspect terminals to ensure proper contact.

      • Consider mechanical life and maintenance intervals in frequent operation environments.

      • Optional auxiliary contacts and alarm modules improve monitoring and protection.

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