What is the FANUC A02B-0120-K342 Connector Plug?
The FANUC A02B-0120-K342 is a circuit board connector plug with 50 contacts, designed for FANUC Series 16/18 CNC systems. As a passive component, it derives all operating power from the host CNC, ensuring seamless integration into legacy control architectures.
Engineered for exact mating with Hirose HIF3BB-50D flat cable-side connectors, this plug maintains signal integrity in demanding industrial environments. Its verified compatibility with Series 16/18 makes it a reliable choice for maintenance and repair.

Key Specifications and Engineering Details
- Connector Type: Circuit board connector plug (supplier-reported, multi-source consensus).
- Contact Count: 50 contacts, matching Hirose HIF3BB-50D interface.
- Supply Voltage: Not applicable; powered by host system.
- Power Consumption: Not applicable; no independent draw.
- Operating Temperature: Follows host CNC rating.
- Storage Temperature: Follows host CNC rating.
- Relative Humidity: 75%RH or less normal; up to 95%RH for short periods (≤1 month), no condensation.
- Weight: ~0.03 kg (supplier-reported, family-level reference).
These parameters underscore the plug's role as a passive interface, where environmental tolerance and contact integrity are critical for reliable signal transmission.

Why Specify This unit for Legacy CNC Maintenance?
Legacy FANUC Series 16/18 controls remain prevalent in many production environments. When a connector plug fails, sourcing an exact replacement is essential to avoid downtime. This unit offers a verified fit for the Hirose HIF3BB-50D interface, reducing the risk of mismating or signal loss.
Its passive nature means no additional power or configuration is required; the plug simply channels signals between the circuit board and flat cable. This simplicity translates to faster repairs and fewer variables during troubleshooting.
Moreover, the humidity tolerance supports operation in non-condensing industrial settings, aligning with the environmental conditions specified in FANUC maintenance manuals. For engineers managing legacy systems, this connector plug delivers engineering-grade precision in a compact package.
Installation and Maintenance Guidance
Installation should follow FANUC's connection manual (B-64303EN/01). Ensure the mating connector is clean and free of debris. Align the plug carefully to avoid bent contacts, and secure it according to the host CNC's specifications.
Periodic inspection is recommended to check for loose connections or corrosion. Since the plug is passive, maintenance focuses on physical integrity and environmental protection. Avoid exposing the connector to condensing humidity or excessive vibration.
For legacy systems, stocking critical spares like This unit can minimize production interruptions. Contact AutoDCSTech with your exact requirements for precise matching and availability.
Availability & Condition at AutoDCSTech
| Part Number | A02B-0120-K342 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | Japan |
