Product Description
The Allis Chalmers AC 4918022 is a bridge rectifier specifically designed for electric lift truck applications, rated for up to 36VDC and 160A peak current. It features a robust encapsulated chassis mount, screw terminal connections, and is constructed with high-dielectric epoxy and extruded aluminum for effective heat dissipation. Supersedes part numbers 7024918022 and 4918022, and can cross over to Clark 2770488 and Hyster 1174929 for compatible electric forklift systems.
Specifications
Dimensional Specifications
| Clearance Requirement | Minimum of 0.50 inch on all sides for air flow |
Electrical
| Rated Voltage | 36VDC maximum |
| Peak Current | 160 Amperes at 36VDC |
| Forward Voltage Drop per Diode | 1.1 VDC maximum |
| Terminal Type | Screw terminal, #10-32 UNC |
Material & Construction
| Body Material | Molded epoxy, high dielectric strength |
| Enclosure Finish | Anodized aluminum |
Part Numbers
| OEM Part Number | AC 4918022 |
| Cross-Reference Part Numbers | Replaces 7024918022, Supersedes 4918022, Interchangeable with Clark 2770488, Hyster 1174929 |
| Manufacturer Part Number | 4918022 |
Performance Specifications
| Service Factor | 1.0 at rated amperage |
Frequently Asked Questions
Q: What is the rated voltage and current capacity for the AC 4918022 bridge rectifier?
A: The AC 4918022 is rated for a maximum of 36VDC with a peak current of 160 Amperes at 36VDC. The forward voltage drop per diode is 1.1 VDC maximum. This specification makes it suitable for electric lift truck systems that operate within this voltage and current range.
Q: Which equipment brands and models does the AC 4918022 cross-reference to?
A: The AC 4918022 is interchangeable with Clark 2770488 and Hyster 1174929. It supersedes older part numbers 7024918022 and 4918022, making it a direct replacement for compatible electric forklift and lift truck systems from these manufacturers.
Q: What materials and construction features does this bridge rectifier have?
A: The AC 4918022 features a robust encapsulated chassis mount construction with high-dielectric epoxy and extruded aluminum components. This design provides effective heat dissipation and electrical protection, which is critical for reliable operation in electric lift truck charging and power circuits.
Q: What connection type does the AC 4918022 use?
A: This bridge rectifier utilizes screw terminal connections, allowing for secure and reliable electrical attachment to 36VDC electric lift truck circuit boards and harnesses. Screw terminals provide consistent contact and are commonly found in industrial lift truck electrical systems.
Q: Is the AC 4918022 designed for specific lift truck applications?
A: Yes, the AC 4918022 is specifically designed for electric lift truck applications, including electric forklifts and pallet jacks. The 36VDC rating and 160A capacity align with standard electric lift truck battery and charging system specifications used in Allis Chalmers, Clark, Hyster, and compatible OEM systems.