ABB 1SDA127160R1 Moulded Case Circuit Breaker -IEC60947-2

Current rating and configuration establish the core protection level for DC distribution. With 100 A nominal current and a fixed 3P contact arrangement, the device fits standard 3-phase DC rails in automation cabinets, reducing the need for oversized components. This translates to smaller panel footprints and more efficient wiring, which is especially valuable in space-constrained control rooms and machine enclosures. Release and trip characteristics ensure fast, predictable disconnection under fault. The Tmax TM/TMD release in XT4 family delivers selective protection with clear coordination, helping prevent unnecessary trips in healthy subcircuits. In practice, engineers rely on consistent arc-quenching performance to improve safety margins and uptime during high-energy DC faults. Electrical strength and protection ratings are designed for demanding DC bus architectures. Rated Operational Voltage is 750 V DC, with Rated Insulation Voltage of 1000 V and 8 kV rated impulse withstand, giving designers headroom to protect critical loads. Service and Ultimate Short-Circuit Capacities are up to 50 kA depending on voltage and pole configuration, ensuring robust fault clearance across multiple circuit branches. Mechanical durability is substantial, with 25,000 cycles at 240 cycles per hour. The unit weighs 2.5 kg and uses Fixed Circuit-Breaker terminals, enabling a solid, vibration-resistant connection and straightforward installation. The compact dimensions (105 mm wide, 160 mm high, 82.5 mm deep) support dense panel layouts while maintaining reliable contact integrity. Sustainability and compliance features are built in. ABB EcoSolutions support disassembly instructions for end-of-life handling, plus an Environmental Product Declaration (EPD) for Tmax XT4 TM. Recyclability is designed per EN45555 at 56.3%, and the RoHS declarations confirm compliance with EU directives; Customs tariff number is 85362000. Practical installation considerations help installers and buyers choose confidence. The fixed-terminal design reduces wiring errors and simplifies field wiring in new builds or retrofits, while the 100 A / 750 V DC rating aligns with common DC power rails found in automation plants. For system integrators, the XT4 family provides consistent trip curves, predictable maintenance intervals, and long-term reliability.