siemens
Siemens SIRIUS 3RT Power Contactor
Model: 3RT2025-1AP00
4-hour response · Pricing in SAR · Delivery across all KSA regions
3RT2025-1AP00 — Siemens SIRIUS 3RT Power Contactor
The Siemens SIRIUS 3RT power contactor is the backbone of Siemens motor control, the most widely installed Siemens contactor in Saudi Arabia and across the GCC, and a product whose reputation for reliability in demanding thermal and electrical environments has been validated across decades of operation in the Kingdom's oil & gas, petrochemical, water, and heavy industry sectors. Available from 4 A to 2000 A in AC-3 utilisation class, the 3RT range covers every LV motor control application from a fractional-kilowatt auxiliary pump to a 1000 kW main process pump drive. The 3RT's compact DIN-rail form factor and uniform depth across the current range allows modular motor control centre assembly with consistent panel depth, simplifying engineering for large MCC projects.
The 3RT's defining technical feature is its integrated arc quenching system — blow-out magnets that deflect the switching arc away from the contact surface immediately on opening, reducing contact erosion and extending electrical life to over 10 million operating cycles in AC-3 duty. This translates directly to lower maintenance costs and fewer unplanned outages in high-cycle applications such as batch process pumps and compressor staging systems. The spring-loaded contact carrier eliminates contact bounce, and the SIRIUS auxiliary contact ecosystem — snap-on blocks for 1NO+1NC, 2NO, 2NC, and latching configurations — allows any required control circuit function to be assembled from standard parts without bespoke engineering. The optional electronic coil (VS auxiliary) suppresses inrush current to the coil on AC supplies, enabling switching from PLC transistor outputs without intermediate relays.
In Saudi Arabia, the SIRIUS 3RT is the standard contactor specification in ARAMCO-approved MCC panels, SABIC process plant motor control centres, SEC substation auxiliary power systems, and NEOM infrastructure motor starters. Panel builders holding SEC and ARAMCO vendor approval routinely build 3RT-based DOL, star-delta, and reversing starter assemblies as standard panel modules, stocking 3RT contactors in common sizes for fast-turnaround panel assembly and site spares. The 3RT's inclusion in Siemens' TIA Selection Tool facilitates Bill of Materials generation for complete motor control systems, streamlining project documentation for large Saudi infrastructure and industrial procurement projects.
Razz Middle East maintains comprehensive stock of 3RT contactors from size S00 (4A) through size S12 (2000A) in 24 V, 110 V, and 220 V AC/DC coil voltages for immediate delivery to panel builders, contractors, and industrial maintenance teams throughout Saudi Arabia.
Technical Specifications
Full specifications for the 3RT2025-1AP00
- Rated Current
- 4–2000 A (AC-3 utilisation class)
- Voltage
- Up to 1000 V AC
- Coil Voltage
- 24 V, 110 V, 220 V AC/DC
- Poles
- 3-pole main + snap-on auxiliary contacts
- Electrical Life
- >10 million operations (AC-3)
- Mounting
- DIN rail TS35 / panel screw
- Standard
- IEC 60947-4-1
- Sizes
- S00 (4A) through S12 (2000A)
Key Features & Benefits
- Blow-out magnet arc quenching system deflects the switching arc immediately on contact opening, reducing contact erosion and extending electrical life to over 10 million AC-3 operations — cutting maintenance intervals in high-cycle pump and fan applications.
- Spring-loaded contact carrier eliminates contact bounce on make and break, reducing re-strike arcing that degrades contact surfaces and causes intermittent voltage transients on sensitive control circuits.
- Snap-on auxiliary contact ecosystem — 1NO+1NC, 2NO, 2NC, latching, and delay variants — assembles any required control circuit function from standard parts without bespoke components, simplifying MCC panel engineering and spare parts management.
- Optional electronic coil (VS) suppresses coil inrush current, enabling direct switching from PLC transistor outputs (24 V DC) without intermediate interposing relays — reducing panel component count and wiring in modern automation panels.
- Uniform housing depth across the full size range (S00 to S6) simplifies MCC panel engineering by maintaining consistent module depth, allowing standardised panel back-plate and busbar designs across multiple current ratings.
- Mechanically and electrically interlocked reversing contactor pairs are available as factory-assembled units, eliminating the mechanical interlocking work that increases assembly cost and error risk when building reversing starters from individual contactors.
- Direct-mount interface with SIRIUS 3RU overload relays and 3RV motor protection circuit breakers creates a complete motor starter assembly without inter-device wiring, reducing assembly time and improving starter compactness.
Industrial Applications in Saudi Arabia
- Direct-on-line motor starters in ARAMCO-approved MCCs at upstream and downstream processing facilities in the Eastern Province, where 3RT contactors with 220 V AC coils are the standard motor switching device in ARAMCO-spec panel assemblies.
- Star-delta reduced voltage starters for large induction motors at SABIC Jubail petrochemical plants, where the 3RT's extended electrical life supports the frequent start-stop cycling required during batch process operations.
- Reversing starters for valve actuators, hoists, and craneage systems at industrial facilities across Dammam and Al Khobar, where factory-assembled interlocked pairs eliminate site wiring errors during panel commissioning.
- Capacitor bank switching contactors in power factor correction systems at large industrial facilities, where 3RT contactors with damping resistors provide controlled capacitor switching without nuisance voltage transients.
- DOL motor starters in NEOM utility infrastructure MCCs, where 3RT contactors with PROFINET-compatible auxiliary contacts integrate with the project's S7-1500 PLC-based motor management system.
- Auxiliary power system switching in SEC grid substations and private industrial power substations, where the 3RT's proven reliability record in high-ambient-temperature environments is backed by decades of in-Kingdom service history.
- MCC motor starters in NWC water pumping stations across the Kingdom, where 24 V DC coil versions allow direct PLC transistor output switching in modern SCADA-integrated pump control panels.
Industrial Supplier in Saudi Arabia
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Frequently Asked Questions — 3RT2025-1AP00
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