The FANUC A81L-0001-0186 is an AC reactor specified for the FANUC αiPS 26-B power supply module in compatible 200V-input αi-B amplifier systems.

FANUC technical documentation lists this exact reactor as the standard specification for the αiPS 26-B. In the documented amplifier-system configuration, the AC reactor is installed in the incoming three-phase main-power circuit ahead of the compatible αiPS-B power supply module.

The A81L-0001-0186 is commonly searched for under product names including:

• FANUC AC Reactor
• FANUC Line Reactor
• FANUC αiPS 26-B Reactor
• FANUC A81L-0001-0186 Input Reactor
• FANUC CNC Power Supply Reactor

These terms describe the same product category without incorrectly classifying the component as a transformer, power supply, servo amplifier, or control PCB.

The reactor should be selected according to the connected FANUC power-supply model and the original electrical installation. Similar FANUC reactors can have different capacities, terminal arrangements, dimensions, and applicable αiPS models.

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Product Details

• Brand: FANUC
• Part Number: A81L-0001-0186
• Alternative Format: A81L00010186
• Official Product Type: AC Reactor
• Common Product Name: AC Line Reactor
• Applicable Power Supply: FANUC αiPS 26-B
• Power-Supply Family: FANUC αiPS-B
• Input System Class: 200V Series
• Main-Circuit Configuration: Three-Phase AC Input
• Protection Specification: Conductive Parts Equivalent to IP2X
• Official Reference Weight: Approximately 8.0kg
• Product Series: A81L-0001
• Application: Compatible FANUC αi-B Amplifier Power Systems
• Category: FANUC Reactor / CNC Power-System Component

The applicable αiPS model, input-series classification, protection specification and reference weight follow FANUC αi-B amplifier documentation.

AC Reactor Function

The A81L-0001-0186 forms part of the main AC input circuit for a compatible FANUC αiPS 26-B power supply configuration.

FANUC system diagrams place the AC reactor between the incoming power-control components and the αiPS-B power supply module. It is therefore an external power-system component rather than an internal PCB or amplifier module.

A complete installation may also include:

• Input circuit breaker
• Noise filter
• Magnetic contactor
• FANUC AC reactor
• αiPS-B power supply module
• Compatible servo and spindle amplifier modules
• Grounding and protective devices

The exact configuration must follow the original machine wiring and the applicable FANUC connection documentation.

Current and Earlier Specifications

FANUC documentation distinguishes between the earlier and current reactor specifications for the αiPS 26-B:

• A81L-0001-0157: Earlier version with conductive-part protection corresponding to IP1X
• A81L-0001-0186: Current version with conductive-part protection corresponding to IP2X

This indicates that A81L-0001-0186 is the later documented reactor specification for the αiPS 26-B power supply.

However, replacement should still be confirmed against:

• Original machine wiring
• Mounting dimensions
• Terminal size
• Cable and crimp-terminal specification
• Cabinet clearance
• Applicable safety requirements

The earlier and current versions should not be exchanged solely because they are associated with the same αiPS model.

Product Classification Clarification

The A81L-0001-0186 should be listed as:

FANUC AC Reactor / AC Line Reactor

It should not be classified as:

• General-purpose transformer
• Servo amplifier
• Power supply module
• Main CPU board
• Control PCB
• Voltage regulator

Some reseller pages use the word “transformer,” but FANUC’s own technical documentation categorizes the A81L-0001-0186 specifically as an AC reactor.

Using the correct product type helps Google and AI search systems connect the model number with relevant searches for FANUC reactors, αiPS 26-B accessories and CNC power-system components.

Compatibility Note

Before ordering the A81L-0001-0186, please verify:

• Complete FANUC part number
• Connected power-supply module model
• Confirmation of the αiPS 26-B configuration
• 200V-series main-power system
• Original reactor label
• Mounting-hole arrangement
• Terminal and cable specification
• Cabinet installation space
• Earlier or current reactor version
• Condition of the original wiring and terminals

FANUC assigns different reactor numbers to different αiPS-B capacities. For example, the same official table lists separate reactors for αiPS 15-B, αiPS 30-B and αiPS 37-B systems. The A81L-0001-0186 should therefore not be selected only by physical appearance.

Common Use Cases

• Replacement of an A81L-0001-0186 AC reactor
• Maintenance of a FANUC αiPS 26-B power system
• Restoration of the original αi-B amplifier input configuration
• Replacement of a reactor with confirmed winding or terminal damage
• Rebuilding a compatible FANUC power-magnetics cabinet
• Preparing a matching spare reactor for maintenance inventory

Sales & Support

Each A81L-0001-0186 AC Reactor is inspected for part-number accuracy, physical condition and terminal condition before delivery.

REACO CNC provides warranty coverage, product-identification assistance and technical support for FANUC power supplies, servo amplifiers, spindle amplifiers and related power-system components.

Worldwide delivery is available through DHL, UPS, FedEx and other express carriers.