MHF® 4L LK Locking Industry Standard Miniature RF Micro-Coax Product Series

I-PEX connectors have patented locking technology for enhanced durability in high-vibration environments

Image of I-PEX MHF® 4L LK Receptacle and HarnessesThe MHF 4L LK connector from I-PEX is a robust evolution of the MHF 4L series designed for secure, high-performance RF connections in environments subject to continuous shock and vibration. This micro-RF coaxial connector features a patented mechanical locking system that ensures a reliable connection, even under the most demanding conditions. With a compact mated height of just 2.00 mm and a frequency range of 12 GHz, the MHF 4L LK is ideal for applications requiring both space efficiency and signal integrity. It mates with the standard MHF 4/4L receptacles, making it a drop-in upgrade for existing designs that require enhanced retention force. The locking mechanism of the MHF 4L LK greatly enhances connection reliability by preventing accidental disconnection. This is a crucial feature for automotive, industrial, and ruggedized IoT applications. As a result, the MHF 4L LK is ideally suited for devices that are exposed to mechanical stress, such as drones, robotics, and mobile communication equipment.

Features
  • Ideal for continuous shock and vibration applications
  • Patented locking system for MHF 4L plug
  • Mates with MHF 4/4L receptacles
  • Height: 2.00 mm maximum
  • Frequency range: 12 GHz
  • Micro-coaxial cable: 30 AWG (1.37 mm)
Disengagement force comparison
    Image of I-PEX Force Comparison Graph

MHF® 4L LK Receptacle and Harnesses

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
MHF 4 RECEPTACLE20449-001E-03MHF 4 RECEPTACLE33901 - Immediate$1.04View Details
MHF 4L RECEPTACLE20579-001EMHF 4L RECEPTACLE39589 - Immediate$1.79View Details
COAX CBL MHF4L LK-MHF4L LK 3.9"8-23-0110COAX CBL MHF4L LK-MHF4L LK 3.9"559 - Immediate$2.83View Details
COAX CBL MHF4L LK-MHF4L LK 7.8"8-21-0044COAX CBL MHF4L LK-MHF4L LK 7.8"1311 - Immediate$2.93View Details
COAX CBL MHF4L LK-MHF4L LK 19.6"8-23-0111COAX CBL MHF4L LK-MHF4L LK 19.6"2418 - Immediate$3.29View Details
MHF 4 CONNECTOR MATING/UNMATING90435-001MHF 4 CONNECTOR MATING/UNMATING369 - Immediate$27.00View Details
MHF 4L MATING/UNMATING TOOL90609-0001MHF 4L MATING/UNMATING TOOL233 - Immediate$27.00View Details
MHF 4L LK HAND TOOL JIG - NARROW91493-0001MHF 4L LK HAND TOOL JIG - NARROW7 - Immediate$180.77View Details
MHF 4 SMA ADAPTOR FOR PLUG (3K)90449-001MHF 4 SMA ADAPTOR FOR PLUG (3K)275 - Immediate$71.50View Details
MHF 4 SMA ADAPTOR FOR RECE (500)90449-002MHF 4 SMA ADAPTOR FOR RECE (500)51 - Immediate$71.50View Details
MHF 4 HIGH CYCLE ADAPTOR(0.65)90698-0001MHF 4 HIGH CYCLE ADAPTOR(0.65)17 - Immediate$102.06View Details
MHF 1, 4, 4L, 5 (4.5MM) HIGH CYC90577-0350MHF 1, 4, 4L, 5 (4.5MM) HIGH CYC0 - Immediate$83.51View Details
MHF 4 (4.5MM) HIGH CYCLE TEST PR90576-0001MHF 4 (4.5MM) HIGH CYCLE TEST PR0 - Immediate$44.31View Details
Published: 2025-08-08