This document introduces the Amphenol JT/LJT series subminiature cylindrical connectors, including connector specifications, plug and socket arrangements, and plug and socket models.
The JT/LJT series offers subminiature cylindrical connectors for aerospace and other high‑reliability applications. Both JT (crimp) and LUT (crimp) families meet or exceed MIL‑DTL‑38999 requirements and are available in a wide range of shell sizes, contact options, and mounting styles.
Key features include lightweight, space‑saving designs, 100 % scoop‑proof contact protection, quick positive coupling with a 3‑point bayonet lock, and optional EMI shielding. The catalog lists insert availability, hermetic and non‑hermetic options, accessories, and special variants such as filter‑protected, Aquacon immersible, and ground‑plane connectors.
| Shell sizes | Nine shell sizes |
|---|---|
| Contact size options | 8, 10, 12, 16, 20, 22M, 22D |
| Circuit count per connector | 2 to 128 circuits |
| RoHS compliance | Available |
The series offers nine shell sizes with a variety of shell styles.
Contact sizes 8, 10, 12, 16, 20, 22M and 22D are offered.
Yes, RoHS‑compliant versions of the connectors are available.
Each connector can be configured with a minimum of 2 up to a maximum of 128 circuits.