MHF4 to SMA-Female Bulkhead Pigtail 100mm (TE Connectivity / Linx CSJ-SGFB-100-MHF4)

Route the antenna out of your enclosure, the professional way. This genuine TE Connectivity Linx pigtail connects a board with an MHF4 (IPEX4) antenna socket to an external SMA antenna, using a sealed bulkhead connector that mounts cleanly through your enclosure wall. It is a quality-manufactured RF assembly with gold-plated contacts and a 0.81mm coax rated up to 6 GHz, not a generic clone.

If you are building a compact LoRa node, a solar Meshtastic or MeshCore device, or any project where the board uses the smaller MHF4 connector, this is the pigtail that gets a real antenna onto the outside of your build.

Important: This Is an MHF4 Connector, Not Standard U.FL

There are several sizes of miniature RF connector that look similar but are not compatible with each other. This pigtail uses the MHF4 (also called IPEX4 or I-PEX MHF4) connector, which is the smallest of the common types. Before ordering, confirm your board uses MHF4, not the larger U.FL / IPEX1 / MHF1.

If you are unsure which connector your board has, check the board's datasheet or contact us before ordering.

Key Features

• MHF4 (IPEX4) male, right-angle connector: low profile plug that snaps onto MHF4 sockets on compact boards, ideal for tight spaces
• SMA-Female bulkhead connector: with sealed rear-mount design. Installs from inside the enclosure, which keeps debris and moisture out and gives a clean, professional exterior
• Genuine TE Connectivity / Linx assembly: gold-plated brass contacts, consistent 50Ω impedance, factory quality control
• 0.81mm coax, up to 6 GHz: more than enough headroom for 868 MHz EU868 LoRa
• 100mm length: the right length to route from board to enclosure wall without excess slack

What This Pigtail Lets You Do

Compact LoRa boards with an MHF4 socket are designed to be small, which means the antenna connection is a tiny surface-mount socket, not something you can attach a real antenna to directly. This pigtail solves that:

• Snap the MHF4 plug onto your board's antenna socket
• Mount the SMA bulkhead through a hole in your enclosure wall, secured with its nut
• Screw any SMA antenna onto the outside

The result is a weatherproof, professional-looking build where the antenna is properly external and the electronics stay sealed inside.

Specs

• Manufacturer: TE Connectivity / Linx Technologies
• Part number: CSJ-SGFB-100-MHF4
• Connector A: MHF4 (IPEX4) plug, male, right angle
• Connector B: SMA jack, female, bulkhead
• Cable type: 0.81mm coax
• Cable length: 100mm
• Impedance: 50Ω
• Frequency range: 0 Hz to 6 GHz
• Contact material: Brass, gold-plated
• Jacket colour: Black
• Weight: approximately 12 grams
• Country of origin: Taiwan

What's in the Box

• 1 × MHF4 to SMA-Female bulkhead pigtail, 100mm (TE Connectivity / Linx CSJ-SGFB-100-MHF4)

Pair It With

• Flexible LoRa Whip Antenna (SMA-Male) (€17,95): screw straight onto the SMA bulkhead once mounted
• Hexaspot Tactical Gooseneck Antenna (€29,95): a positionable antenna for the outside of your enclosure
• Weather Sealing Tape: seal the outdoor SMA connection for weatherproof installations