myMectronic
myMectronic

A Premier B2B Part Search

AMPHENOL PCD RJF21B Industrial Ethernet Connector

The RJF21B is an Ethernet connection system featuring a black square flange receptacle with female RJ45 back termination. It supports Ethernet Class D / Cat. 5e networks, suitable for 10BaseT, 100BaseTX, and 1000BaseT connections in harsh environments. The system incorporates the patented RJStop® system, transforming standard RJ45 cordsets into protected connectors resistant to shocks, dust, and fluids. It includes bayonet coupling with audible and visual feedback, robust MIL-DTL-26482 size-18 shells, and a retention force of 100N. Sealed to IP68, it withstands shocks, vibrations, and traction, requiring no tools or field cabling operations. Ideal for robotics, automation, process control, mining, and oil & gas industries.

Authorized Distributors
Source:Newark
Part No:RJF21B
Stock:697
Inv Date:06-07-2026
Price: Unit price: $51.32
Buy/RFQ:
Source:DigiKey
Part No:RJF21B
Stock:677
Inv Date:06-07-2026
Price: Unit price: $43.84
Buy/RFQ:
Part No:RJF21B
Stock:0
Inv Date:06-08-2026
Price: Unit price: $44.18
Buy/RFQ:
Part No:RJF21B
Stock:262
Inv Date:06-07-2026
Price: Unit price: $52.25
Buy/RFQ:
Part No:RJF21B
Stock:419
Inv Date:06-06-2026
Price: Unit price: $45.6275
Buy/RFQ:
Part No:RJF21B
Stock:0
Inv Date:06-07-2026
Price: Unit price: $70.98
Buy/RFQ:
Part No:RJF21B
Stock:98
Inv Date:06-06-2026
Price: Unit price: $45.6275
Buy/RFQ:
Part No:RJF21B
Stock:18
Inv Date:06-07-2026
Price: Unit price: $128.75
Buy/RFQ:

AMPHENOL PCD RJF21B Industrial Ethernet Connector Specifications:

  • Supports Ethernet Class D / Cat. 5e networks
  • Compatible with 10BaseT, 100BaseTX, 1000BaseT
  • Sealing: IP68 against fluids and dust
  • Shell type: MIL-DTL-26482 size-18, square flange or jam nut
  • Coupling: Bayonet with audible & visual feedback
  • Retention force: 100 N
  • Mating cycles: 500
  • Resistance: Shock, vibration (10-500 Hz, 10 g), traction
  • Temperature range: -40°C to +85°C
  • Material: Metallic shell, nickel, or black coating
  • Salt spray resistance: 48+ hours
  • Fire retardant: UL94 VO
  • Ingress protection: IP68
  • Standards: IEC 60603-7 variant 11

Buy the Amphenol RJF21B – Reliable Industrial Ethernet for Harsh Environments

Enhance your industrial communication setup with the RJF21B Ethernet connector. Featuring IP68 sealing, durable metallic shells, and the innovative RJStop® system, it provides reliable protection against dust, fluids, shocks, and vibrations. Its bayonet coupling ensures quick, secure connections with audible and visual signals, reducing installation time and errors. Designed for industrial automation, robotics, and process control applications, this connector eliminates hazardous cabling and grounding procedures. Order online now for dependable, high-performance Ethernet connectivity in challenging environments.

Order your Amphenol RJF21B Ethernet connection system today and ensure robust, sealed network connectivity in demanding industrial environments.

Frequently Asked Questions

Where can I buy AMPHENOL PCD RJF21B?

You can click on the BUY or RFQ button to purchase RJF21B from an authorized AMPHENOL PCD distributor.

How do I troubleshoot issues or seek technical support for part RJF21B?

You can download the RJF21B datasheet or visit the AMPHENOL PCD website for support.

Who is the manufacturer of RJF21B?

AMPHENOL PCD

AMPHENOL PCD Part List

Browse and search other AMPHENOL PCD parts, locate datasheets and stock

Sponsored by