Product Description
Heavy-duty 24VDC contactor assembly with 300A continuous rating, designed for forward/reverse switching of electric lift trucks. Features DPDT configuration, 0.400 inch copper alloy tips, and compatibility with Komatsu, Allis Chalmers, and Tusk electric forklifts using GE EV100 controls. Includes multiple cross-reference part numbers for GE, Mitsubishi, and Caterpillar equivalents.
Specifications
Electrical Specifications
| Nominal Voltage | 24VDC (direct current operation) |
| Control Voltage | 24VDC nominal (coil) |
| Continuous Current Rating | 300A continuous |
| Contact Configuration | DPDT (Double Pole Double Throw) |
| Contact Material | Copper alloy tips, 0.400 inch |
| Maximum Duty Cycle | 100% continuous (no derating at nominal load) |
| Interruption Rating | Capable of switching full-rated load with inductive DC motor field |
Part Numbers
| Manufacturer Part Number | 3BB-47-A3910 |
| Alternate Part Number | AC3BB-47-A3910 |
| Cross-Reference Part Numbers | GE300AA124XN-GE, INT968-24, MB300A-24B1M4RS01-30E, MB300A-24B5M48RS02-18A, MB300A-24D2M10RS03-18A, CT300A-24D2M10RS03-18A |
Compatibility
| Compatible Equipment | Komatsu electric forklifts; Allis Chalmers and Tusk lift trucks with GE EV100 controls |
| Reference Application | Komatsu FB20, FB25, FB30 (SHH series with variants), Allis Chalmers electric forklifts, Caterpillar Towmotor (via cross-reference interchanges) |
Frequently Asked Questions
Q: What voltage does the 3BB-47-A3910 contactor operate at?
A: This contactor is rated for 24VDC continuous operation. It is designed for forward and reverse switching in 24-volt electric lift truck circuits.
Q: Which electric lift trucks are compatible with this 300A contactor?
A: This contactor fits Komatsu, Allis Chalmers, and Tusk electric forklifts using GE EV100 control systems. Verify your lift truck model number before ordering to confirm compatibility.
Q: What is the continuous current rating for this contactor?
A: The 3BB-47-A3910 has a 300A continuous current rating. This handles the high amperage demand of electric traction and hydraulic motors in heavy-duty lift applications.
Q: What cross-reference part numbers interchange with 3BB-47-A3910?
A: Cross-reference equivalents include GE300AA124XN-GE, INT968-24, MB300A-24B1M4RS01-30E, MB300A-24B5M48RS02-18A, MB300A-24D2M10RS03-18A, and CT300A-24D2M10RS03-18A. Use these when sourcing replacement parts from different suppliers.
Q: What type of switching configuration does this contactor have?
A: This is a DPDT (double pole double throw) contactor with 0.400 inch copper alloy contact tips, designed for forward and reverse motor control in electric lift trucks.
Q: How do I verify this contactor fits my lift truck control panel?
A: Check your lift truck wiring diagram for the EV100 control system and confirm the coil voltage is 24VDC and the terminal configuration matches your panel layout. Contact technical support with your lift truck model number and serial range if you need verification.