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LUMBERG KFR40 Circular Connector

The KFR40 is a high-quality circular connector designed for robust environmental performance and secure electrical connections. Featuring M16 threaded joints and IP40/IP67/IP68 ratings, it ensures reliable operation in challenging conditions. The connector incorporates gold andsilver-plated contacts, a zinc diecast housing, and PA GF insulating bodies, offering excellent durability and resistance. Suitable for PCB front mounting, it operates within a temperature range of -40°C to +85°C, providing rated currents up to 5A and voltages varying with pollution degree. Ideal for industrial automation, control systems, and rugged environments.

Authorized Distributors
Source:Newark
Part No:KFR 40
Stock:70
Inv Date:06-15-2026
Price: Unit price: $1.04
Buy/RFQ:
Source:DigiKey
Part No:KFR 40
Stock:98
Inv Date:06-15-2026
Price: Unit price: $6.93
Buy/RFQ:
Part No:KFR 40
Stock:0
Inv Date:06-15-2026
Price: Unit price: $4.49
Buy/RFQ:

LUMBERG KFR40 Circular Connector Specifications:

  • Threaded joint: M16x0.75
  • Housing material: Zinc diecast, pre-copper and nickel-plated
  • Insulating body: PA GF, V-0 according to UL94
  • Contacts: CuZn, silver-plated and flash gold-plated; tin-plated in solder area
  • Operating temperature: -40°C to +85°C
  • Protection class: IP40 in basic state, IP67/IP68 with appropriate sealing
  • Rated current: 5A (T<40°C), 3A (12 poles)
  • Rated voltage: Varies, 250V to 300V depending on pollution degree
  • Contact resistance: <5mΩ
  • Overvoltage category: CAT I
  • Insulation resistance: >100 MO
  • Tightening torque: +3Nm

Buy the Lumberg Series KFR Circular Connector: KFR40

Enhance your industrial setups with the Lumberg Series KFR40 circular connector, engineered for durability and reliable electrical connections in demanding environments. Featuring a robust zinc diecast housing and high-quality gold and silver-plated contacts, it ensures optimal performance across a temperature range of -40°C to +85°C. Suitable for PCB front mounting with IP67/IP68 sealing, rated currents up to 5A, and voltage capabilities tailored for pollution degree environments. This connector is ideal for automation systems, control panels, and durability-critical applications, offering longevity and excellent electrical stability.

Order your Lumberg Series KFR40 rugged circular connector today and give your projects the dependable quality they deserve in harsh industrial environments.

Frequently Asked Questions

Where can I buy LUMBERG KFR40?

You can click on the BUY or RFQ button to purchase KFR40 from an authorized LUMBERG distributor.

How do I troubleshoot issues or seek technical support for part KFR40?

You can download the KFR40 datasheet or visit the LUMBERG website for support.

Who is the manufacturer of KFR40?

LUMBERG

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