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A06B-6073-K250

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A06B-6073-K250
May 13, 2026

A06B-6073-K250

FANUC A06B-6073-K250 Fuse Kit General Description The A06B-6073-K250 is an original FANUC servo amplifier fuse kit, a critical overcurrent protection component for FANUC Alpha i-Series and related A06B-6073-series servo drives. It is factory-configured for 48 VAC/DC circuits, providing reliable short-circuit and overload protection for servo power and control loops. When circuit current exceeds the rated value, the fuse blows quickly to isolate faults and prevent permanent damage to the servo amplifier, motor, and downstream CNC system. Widely used in new machine assembly, routine maintenance, and emergency repair of FANUC servo systems, it is a standard replacement part for industrial automation and CNC machine tools.

Description

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Product Specifications

  • Part Number: A06B-6073-K250

  • Fuse Rating: 3.2 A (31 ms fast-blow characteristic)

  • Withstand Current: 50 A (intermittent)

  • Voltage Rating: 48 VAC / 48 VDC

  • Construction: Compact cartridge-style fuse with insulating housing

  • Application: Overcurrent protection for servo amplifier internal circuits

Key Features

This fuse adopts a fast-blow design with a precise 31 ms response time, enabling rapid isolation of short circuits and overloads. The high-temperature resistant housing provides excellent insulation and mechanical stability, resisting vibration and thermal cycling in industrial environments. Engineered for compatibility with FANUC A06B-6073-series servo amplifiers, it ensures drop-in replacement without modification. The compact form factor minimizes space occupation in electrical cabinets and supports easy installation in dedicated fuse holders. Manufactured to FANUC’s strict quality standards, it delivers consistent performance and long-term reliability under normal operating conditions.

Application Scope

Compatible with FANUC Alpha i-Series servo amplifiers (A06B-6073 series) and selected Beta series drives. Used in CNC lathes, machining centers, milling machines, grinders, and other machine tools equipped with FANUC servo systems. Primary applications include protection of servo power supply circuits, control signal loops, and auxiliary power rails within the servo amplifier. Ideal for maintenance replacement, system upgrades, and aftermarket repair of FANUC servo units.

Installation Instructions

Always perform installation with the servo amplifier and system fully powered off to avoid electric shock and arc flash hazards. Locate the dedicated fuse holder on the servo amplifier (refer to the amplifier’s wiring diagram for exact position). Remove the old fuse by gently pulling it straight out from the holder. Inspect the holder for damage, corrosion, or loose contacts; clean or replace if necessary. Insert the new A06B-6073-K250 fuse firmly into the holder, ensuring full seating and no wobble. Close the amplifier cover and restore power only after all wiring and checks are complete.

Wiring & Replacement Requirements

  • Use only genuine FANUC A06B-6073-K250 fuses; do not substitute with non-rated or generic fuses.

  • Verify the fuse rating (3.2 A, 48 VAC/DC) matches the circuit requirements before installation.

  • Inspect the surrounding circuit for short circuits, damaged wiring, or faulty components before replacing a blown fuse.

  • Keep the fuse and holder clean, dry, and free of oil, dust, or conductive debris to ensure reliable contact.

  • Do not reuse blown fuses; always replace with a new, identical-rated fuse.

Working Environment

  • Operating Temperature: -10°C to +60°C

  • Storage Temperature: -20°C to +70°C

  • Relative Humidity: ≤85% (non-condensing)

  • Environmental Conditions: Avoid corrosive gases, heavy oil mist, conductive dust, and excessive vibration. Keep in a dry, ventilated electrical cabinet away from direct sunlight and high-temperature heat sources.

Maintenance Instructions

  • Inspect the fuse and holder periodically (every 3–6 months) with power off, checking for signs of overheating, discoloration, or corrosion.

  • If a fuse blows, immediately power off the system and inspect the servo amplifier, motor, and wiring for short circuits or overloads before installing a new fuse.

  • Do not disassemble or modify the fuse body; any damage to the housing or internal element voids safety and performance.

  • Maintain a stock of spare A06B-6073-K250 fuses for emergency replacement to minimize downtime.

Safety Precautions

  • Only qualified electrical maintenance personnel may inspect, remove, or replace the fuse.

  • Never touch the fuse or holder with power applied; risk of electric shock and arc flash.

  • A blown fuse indicates a fault—do not simply replace the fuse and restore power without identifying and resolving the root cause.

  • Ensure the entire system is reliably grounded to reduce electrical hazards and interference.

  • Keep fuses away from flammable materials and humid, high-temperature environments to prevent degradation and ensure safe operation.


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