ABB A185-30-11 3-Pole Contactor

ABB A185-30 3-Pole Contactor (Ith=275A) – Heavy Duty Motor Control

ABB A185-30 is a 3-pole block contactor in the premium category for demanding industrial and maritime applications. It has a traditional free-air thermal current rating of 275A and a rated operational current of 185A on AC-3 duty (up to 415V) to handle tough electrical loads.

Whether controlling high-inertia naval thruster motors, huge centrifugal pumps or heavy-duty industrial compressors, the A185-30 offers excellent switching reliability, arc suppression and thermal endurance. Its compact footprint for its power rating makes it a perfect choice for space-constrained switchboards and engine room motor control centres (MCCs).

Model Details

• Model/Series: A185-30 (Common variants include A185-30-11)
• Manufacturer Product Number: 1SFL491001R8511 (Standard 110-120V AC / 50-60Hz coil variant—Note: Please verify coil voltage suffix when ordering).
• Part Number Cross-References: ABB 1SFL491001R8511, A185-30-11, 7320500203927 (EAN)

Specifications

Features and Benefits

1. High Thermal Tolerance: Rated for 275A free-air thermal current, enabling it to endure extreme ambient temperatures prevalent in confined engine rooms.
2. Advanced Arc Chute Design: Maximises arc-extinguishing capability, greatly increasing contact life and minimising localised thermal stress during high-load switching.
3. Flexible Auxiliary Configuration: Auxiliary signalling to automation systems (e.g. IAM, PLC or Alarm Monitoring Systems) via conveniently available add-on blocks.
4. Strong Double-Break Contacts: Provides reliable circuit isolation and reduces potential for phase-to-phase faults with strong inductive loads.
5. Global Marine Approvals Designed and designed to meet the severe standards of marine certification for resilience to high vibration and high pitch/roll situations.

Compatibility

Directly compatible with ABB A-Series control infrastructure. It can seamlessly replace older legacy contactor footprints with minimal modification to mounting rails. Fully integrable with ABB thermal overload relays (e.g., TA200DU) and electronic overload relays (e.g., EF190 or EF205) for comprehensive motor protection.

Marine Engineer’s Insight:

For quite a few years the ABB A-Series has been an absolute workhorse in handling naval power distribution. But the severe conditions at sea, with continual low-frequency hull vibrations and salty and humid air, require special maintenance to prevent premature contact welding or coil breakdown.

Lead Time & Shipping Info

In-Stock Items: Dispatched within 24–48 hours.

Global Marine Logistics: Express delivery directly to major worldwide ports or freight forwarders to minimise vessel downtime during port stays or dry-docking.