ABB 1SDA123557R1 Moulded Case Circuit Breaker - IEC 60947-2
Part Number: 1SDA123557R1
Quick Summary
ABB 1SDA123557R1 is a DC four-pole moulded case circuit breaker designed for safe DC power distribution in industrial automation panels. For engineers and technicians, protecting high-energy DC networks from short circuits while minimizing nuisance trips is essential, and this device delivers reliable performance under demanding duty cycles. It aligns with IEC 60947-2 and GB/T 14028.2 standards, with a CE declaration and RoHS/REACH compliance that support sustainable, regulation-ready installations. The unit’s compact footprint, front-terminal design, and modest power loss simplify panel layouts, reduce wiring time, and improve system uptime and maintenance efficiency across critical control and drive applications.
Product Information
Extended Description
1SDA123557R1 ABB: C.BREAKER TMAX XT2L 160 DC FIXED FOUR-POLE WITH FRONT TERMINALS AND THERMOMAGNETIC RELEASE TMA R 50
ABB EcoSolutions
Yes
ABB Site Meeting Group Waste To Landfill Target
UL 2799 Zero Waste To Landfill Validation available
End Of Life Disassembling Instructions
Disassembly instructions Tmax XT XT2 TM
Environmental Product Declaration - EPD
EPD Tmax XT XT2 TM (CN)
Recyclability Rate of the Product acc. to EN45555
Design for Closing Resource Loops - Standard EN45555 - 55.7 %
REACH Declaration
REACh Declaration ABB Sace circuit breakers
RoHS Information
RoHS Declaration ABB Sace circuit breakers
RoHS Status
Following EU Directive 2011/65/EU and Amendment 2015/863 July 22, 2019
Conflict Minerals Reporting Template (CMRT)
Document availability on demand
Customs Tariff Number
85362000
Product Net Width
120 mm
Product Net Height
130 mm
Product Net Depth / Length
82.5 mm
Product Net Weight
1.6 kg
Product Name
Moulded Case Circuit Breaker
Product Type
CB
Version
F
Current Type
DC
Mechanical Durability
25000 cycle | ;240 cycles per hour
Number of Poles
4P
Power Loss
at Rated Operating Conditions per Pole 4.09 W
Rated Current (In)
50 A
Rated Impulse Withstand Voltage (Uimp)
8 kV
Rated Insulation Voltage (Ui)
1000 V
Rated Operational Voltage
500 V DC
Rated Service Short-Circuit Breaking Capacity (Ics)
(250 V DC) 2 Poles in Series 85 kA | (500 V DC) 3 Poles in Series 85 kA
Rated Ultimate Short-Circuit Breaking Capacity (Icu)
(250 V DC) 2 Poles in Series 85 kA | (500 V DC) 3 Poles in Series 85 kA
Rated Uninterrupted Current (Iu)
160 A
Release
TMA
Release Type
TM
Short-Circuit Performance Level
L
Standards
IEC 60947-2 | GB/T 14028.2
Sub-type
XT2
Terminal Connection Type
Fixed Circuit-Breakers
Declaration of Conformity - CE
EC Declaration of Conformity Tmax XT2
Instructions and Manuals
Installation instructions XT2 DC IEC
WEEE Category
5. Small Equipment (No External Dimension More Than 50 cm)
Feature: rated current of 50 A positions ABB 1SDA123557R1 to protect medium-sized DC circuits without nuisance tripping. The four-pole configuration ensures consistent protection across all phases, while fixed rear/front terminals simplify wiring and facilitate clean, reliable panel assembly. In practice, this means fewer field adjustments and more predictable performance under load transients. Feature: rated operational voltage of 500 V DC and rated insulation voltage of 1000 V support safe separation between circuits in industrial DC power rails. This enhances insulation coordination in panels hosting motor drives, DC buses, and energy storage solutions. The result is reduced risk of arcing and improved operator safety during maintenance and fault scenarios. Feature: short-circuit performance with Ics and Icu ratings of up to 85 kA in the specified configurations. The Tmax XT2 TM release provides accurate tripping thresholds and fast disconnection, protecting expensive drives and feeders. The four-pole design ensures simultaneous isolation of all conductors, preserving system integrity during faults. Feature: mechanical durability rated at 25,000 cycles supports frequent switching in automated environments, reducing replacement costs and unscheduled downtime. Power loss of 4.09 W per pole minimizes heat generation within enclosures, enabling denser cabinet layouts and lower thermal management costs. Feature: compliance with IEC 60947-2 and GB/T 14028.2, plus CE declarations, RoHS and REACH adherence. These certifications simplify cross-border procurement and ensure regulatory alignment for industrial automation projects. The front-terminal, fixed-connection design supports straightforward installation in both new builds and retrofit projects. Feature: compatibility with ABB EcoSolutions and standard MCCB installations; installation benefits include straightforward wiring, predictable thermal behavior, and clear fault signaling. In practice, engineers can specify this unit with confidence for DC control panels, power distribution in factories, and data-center infrastructure.
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FAQs
Begin by selecting a panel with suitable DC rating and space for a four-pole unit. Use the front-terminal connections and tighten to the manufacturer’s torque specification to ensure secure wiring. Mount upright in a ventilated area, and connect the line and load conductors following the device marking; verify the TM release operation with a safe test.
Key ratings include a 50 A current rating, 500 V DC operational voltage, 1000 V insulation voltage, 8 kV impulse withstand, and 85 kA service/ultimate short-circuit capacity for the specified pole arrangements. The four-pole TM/TMA release provides coordinated protection across all conductors in automation panels.
Yes. Designed for DC distribution, motor drives, and energy storage in industrial settings, this MCCB provides reliable protection against short-circuits and overloads while enabling compact, front-terminal installations. The 4P design supports coordinated disconnection of all phases, improving safety and reducing fault propagation in control cabinets.
It aligns with IEC 60947-2 and GB/T 14028.2 standards and carries a CE declaration of conformity. RoHS and REACH compliance are documented, supporting environmental and regulatory requirements. These certifications simplify global procurement and ensure regulatory alignment across international projects.
With 25,000 mechanical cycles and low per-pole power loss of 4.09 W, maintenance intervals extend and cabinet cooling needs shrink. The unit’s robustness reduces unplanned downtime, while recyclability and EPD data support sustainable procurement and potential lifecycle cost savings in industrial DC installations.