Shop HITACHI EX120-1-2-3 MAIN FUSE 50AMP (OEM HI 4270555) | Tonkee®

Ampere Rating (50 Amps): The main fuse is rated at 50 amps.

This rating determines the maximum current that can flow through the fuse before it blows or interrupts the circuit. It's crucial to choose the right ampere rating to protect the electrical system effectively.

OEM Part Number (HI 4270555): The OEM (Original Equipment Manufacturer) part number is a unique identifier for this specific fuse. It ensures that you are using a genuine Hitachi replacement part, which is designed to meet the manufacturer's quality and performance standards.

Compatibility (EX120-1, EX120-2, EX120-3): This main fuse is compatible with several models of Hitachi excavators, including the EX120-1, EX120-2, and EX120-3. It's essential to verify compatibility to ensure proper fit and function within your machine.

Fuse Type: The main fuse is typically a blade-type fuse, commonly used in automotive and heavy machinery applications. It features a flat, rectangular shape with two prongs for easy installation and replacement.

Material and Construction: Fuses are generally constructed with materials that have low resistance and can withstand high temperatures.

This ensures that the fuse can handle the electrical current without overheating or failing prematurely.

Voltage Rating: While the ampere rating is critical, the main fuse should also have an appropriate voltage rating to handle the electrical potential in the circuit. It's essential to match the voltage rating of the fuse with the system it protects.

Blow Characteristics: Fuses are designed to blow (interrupt the circuit) when the current exceeds their rating. The blow characteristics, including the time it takes for the fuse to blow under different current conditions, are crucial for protecting sensitive electronic components in the excavator.

Safety Standards: Electrical components in heavy machinery like excavators often need to adhere to specific safety standards and regulations to ensure safe operation. Genuine OEM fuses are more likely to meet these standards.

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