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ABB CB300 Contactor Block for MCB Motor Control
Model: CB300G-20
4-hour response · Pricing in SAR · Delivery across all KSA regions
CB300G-20 — ABB CB300 Contactor Block for MCB Motor Control
The ABB CB300 contactor block is a snap-on accessory that clips directly to the load side of ABB S200M or S800N miniature circuit breakers, converting a standard protective MCB into a remote-operated motor starter with built-in short-circuit and overload protection in a space envelope barely larger than the MCB alone. The combination of CB300 contactor block and MCB provides the same electrical functions as a separate contactor and manual motor protector (MMP) — remotely controlled switching, overcurrent protection, and short-circuit protection coordinated to Type 1 (IEC 60947-4-1) — but in approximately 40% less panel DIN-rail space and with a single wiring connection to the control voltage supply rather than separate wiring to a contactor coil and an MCB auxiliary contact.
The CB300 contactor coil is available in 24 V DC, 24 V AC, 110 V AC, and 230 V AC variants to match the control voltage of the panel. Mechanical interlock between the CB300 contactor block and the MCB prevents the contactor from closing when the MCB is in the tripped position, providing safe operation without the need for a separate electrical interlock relay. An integral 1NO + 1NC auxiliary contact on the CB300 provides feedback to the PLC or control system confirming contactor status. The motor rating extends to 7.5 kW at 400 V in the most common configuration, covering the majority of machine tool motor circuits and automation auxiliary motors.
In Saudi Arabia's machine building and industrial automation sector — concentrated at MODON industrial estates in Riyadh, Jeddah, and Eastern Province — the CB300 is the standard motor control building block for compact machine control panels produced by local machine builders and automation panel builders. The 40% space saving compared to separate contactor and MCB is particularly valuable in the compact DIN-rail panels characteristic of CNC machine tools, packaging machines, and robotic work cells where every millimetre of panel space is allocated. System integrators building automation panels for ARAMCO and SABIC field instrument panels also use the CB300 for 24 V DC motor control circuits for small actuators and valve drives where a full-size contactor and circuit breaker combination would be disproportionately large.
Razz Middle East stocks ABB CB300 contactor blocks in the most common coil voltage and current ratings, compatible with S200M-C curve and S800N-C curve MCBs. We supply to panel builders, machine builders, and automation integrators across Saudi Arabia, and can advise on correct MCB frame size selection and Type 1 coordination verification for specific motor ratings.
Technical Specifications
Full specifications for the CB300G-20
- Motor Rating
- Up to 7.5 kW at 400 V AC
- Short-Circuit Protection
- Type 1 coordination (IEC 60947-4-1)
- Coil Voltage
- 24 V DC / 24 V AC / 110 V AC / 230 V AC
- Coil Consumption
- ~4 W (sealed); ~8 W (pick-up)
- Compatibility
- ABB S200M-C curve; S800N-C curve MCBs
- Auxiliary Contacts
- 1NO + 1NC integrated
- Mechanical Interlock
- Prevents closure on tripped MCB
- Mounting
- Snap-on to MCB load side (no screws)
- Operational Life
- 1 million mechanical operations
- Standard
- IEC 60947-4-1 / IEC 60947-2
Key Features & Benefits
- Snap-on DIN rail mounting converts any ABB S200M or S800N MCB into a complete remote-operated motor starter without additional DIN rail space or wiring — reducing panel assembly time by approximately 30 minutes per motor circuit versus installing separate contactor and MMP components.
- 40% smaller panel footprint versus a separate contactor and manual motor protector on the same DIN rail, enabling more motor circuits per panel in the compact machine tool and automation cabinets characteristic of CNC machinery, packaging machines, and robotic work cells.
- Type 1 coordination certification to IEC 60947-4-1 confirms the CB300-MCB combination provides coordinated short-circuit protection compliant with IEC 60947-4-1 for motor starters — the minimum protection coordination level required for motor control components in machine tools conforming to IEC 60204-1 (Safety of Machinery).
- Mechanical interlock between CB300 contactor block and MCB trip mechanism prevents the contactor from closing when the MCB is in the tripped position, eliminating the need for a separate electrical anti-restart interlock relay in the circuit — reducing component count and wiring complexity per motor circuit.
- 1NO + 1NC integrated auxiliary contact provides PLC or SCADA feedback of contactor on/off status without additional auxiliary contact blocks, enabling motor control and monitoring circuits to be completed with minimal additional wiring — an important advantage for dense automation panels with many motor circuits.
- Wide coil voltage range (24 V DC through 230 V AC) from a single product family allows panel builders to use CB300 in panels with different control voltage standards — from 24 V DC PLC output-driven circuits to 230 V AC relay logic panels — without stocking different contactor types for each control voltage.
- One million mechanical operation rating provides sufficient service life for moderate-duty cycling applications including fan motor start/stop, valve actuator control, and conveyor jog functions in machine tool and automation panels where daily start/stop cycles may reach several hundred operations.
Industrial Applications in Saudi Arabia
- Motor control circuits in CNC machine tool panels at manufacturing facilities in MODON Riyadh and Jeddah Second Industrial City, where the CB300's 40% space saving versus separate contactor and MCB allows more motor circuits in the compact panel format of typical machining centre electrical panels.
- Automation panel motor circuits for packaging machine builders at Saudi food and beverage equipment suppliers, where CB300 snap-on installation reduces panel assembly labour cost and the Type 1 coordination certification satisfies IEC 60204-1 machine safety requirements for the CE marking required on machines exported to European markets.
- Small fan and pump motor control in commercial building control panels at HVAC contractors, where 24 V DC CB300 units directly switch auxiliary pump and fan motors from PLC relay outputs without a separate power relay stage, reducing panel component count and simplifying the building management system wiring.
- Valve actuator motor control at ARAMCO and SABIC field control panels, where the compact CB300 in a 24 V DC coil version provides remotely commanded actuator switching in small stainless steel field junction boxes where a full-size contactor would not physically fit.
- Conveyor belt motor starters in automated warehouse and logistics centre conveyor systems at Aramex, DHL, and Saudi Post distribution facilities, where the high motor circuit density (dozens per control panel) makes the CB300's space-saving advantage directly translatable into a smaller panel enclosure and lower panel fabrication cost.
- Lighting control panels for commercial and industrial facilities, where CB300 units switch fluorescent and LED lighting circuits with manual-ON-OFF-automatic control in a compact DIN rail format that fits the space-constrained panel enclosures used in commercial building electrical distribution boards.
- Training panel motor control circuits at Saudi technical and vocational colleges, where CB300 clip-on installation provides a safe, hand-friendly demonstration of motor starter construction without the risk of high-voltage exposure from unshrouded contactor terminals — a practical advantage for student training exercises on live panels.
Industrial Supplier in Saudi Arabia
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Frequently Asked Questions — CB300G-20
Common questions from buyers in Saudi Arabia and the GCC