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Siemens SIMATIC 3RK1903-3BA00

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3RK1903-3BA00

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The Siemens 3RK1903-3BA00 is a power module specifically designed for failsafe motor starters, operating at a rated voltage of 24 V DC. It has a wide supply voltage tolerance, ranging from 20.4 V DC to 28.8 V DC, to accommodate fluctuation in input power.

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Technical specifications for 3RK1903-3BA00

ManufacturerSiemens
Product TypePower Module for Failsafe Motor Starters
Product LineSIMATIC
Part Number3RK1903-3BA00
EAN4011209547728
Weight0.13 lbs (0.06 kg)
SeriesPower Supplies
Rated Operating Voltage24 V DC
Supply Voltage Tolerance20.4 V DC (min.) to 28.8 V DC (max.)
Ingress Protection (IP) RatingIP20 (front panel)
Touch Safety ComplianceFinger-safe front protection (IEC 60529)
Mounting ConfigurationsVertical or horizontal orientation
Operational Temperature Range0°C to +60°C
Storage/Transport Temperature Range-40°C to +70°C
Vibration Resistance2g (tested per IEC 60947-1)
Shock Resistance5g peak acceleration (11 ms duration)
EMC Immunity ClassificationSeverity Level 3 (industrial environments, IEC 60947-1)
Surge Immunity (Conductor-Earth)2 kV (IEC 61000-4-5)
Number of Failsafe Tripping Groups6 independent tripping groups
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Siemens has developed the 3RK1903-3BA00 power module for failsafe motor starters, which functions effectively with a rated operating voltage of 24 V DC. This module is designed to tolerate supply voltages between 20.4 V DC and 28.8 V DC. It particularly excels in industrial settings, where environmental factors come into play. It meets the IP20 ingress protection rating for front panel safety, ensuring adequacy against dust and accidental contact. The module is designed with finger-safe front protection compliant with IEC 60529 standards.

For installation flexibility, the 3RK1903-3BA00 can be mounted vertically or horizontally, accommodating a variety of applications. It operates reliably in temperatures from 0°C to +60°C, while transport and storage conditions can range from -40°C to +70°C. Durability has been verified through tests that showcase its resistance to vibrations up to 2g and shocks with a peak acceleration of 5g over 11 milliseconds.

Due to its EMC immunity classification of Severity Level 3, this device can handle the electromagnetic disturbances present in industrial environments. Additionally, it offers surge immunity up to 2 kV as per IEC 61000-4-5 standards. For enhanced operational safety, the 3RK1903-3BA00 includes six independent failsafe tripping groups, reinforcing its reliability in critical applications.