Glenair GMLM MasterLatch Micro-D Connectors | Quick-Release Latching Micro-D Connector
Glenair GMLM MasterLatch Micro-D Connectors
Glenair GMLM MasterLatch Micro-D connectors are quick-release latching Micro-D connectors designed for applications where compact size, secure mating and easy connector access are important. As part of Glenair’s metal shell Micro-D connector family, the GMLM series combines miniature Micro-D performance with a precision MasterLatch locking mechanism.
Unlike traditional Micro-D connectors that often rely on jackscrews or jackposts for mating retention, the GMLM MasterLatch design allows the connector pair to be mated and released quickly. This makes the series suitable for electronic systems where frequent maintenance, difficult access or tool-free operation is required.
Glenair describes the GMLM as a MasterLatch pre-wired latching Micro-D connector with insulated wire. The connector pair uses a single thumb latch on the plug side to actuate a pair of locking latches that mate with GMLM receptacles. The connectors are TwistPin equipped, low-insertion-force designs and are available in six insert arrangements from 9 to 37 contacts.
Key Features of Glenair GMLM MasterLatch Connectors
Glenair GMLM MasterLatch Micro-D connectors are designed for high-reliability systems that require both secure locking and convenient operation.
Main features include:
MasterLatch quick-release locking mechanism
Tool-free mating and unmating
Low-insertion-force Micro-D connector design
Gold-plated TwistPin contact system
Pre-wired insulated wire configuration
Metal shell construction
Pin plug and socket receptacle options
Six contact layouts: 9, 15, 21, 25, 31 and 37 contacts
Multiple shell plating options
Suitable for vibration, shock and mating durability requirements
The ergonomic latch can be operated with a thumb and forefinger grip, including situations where the user is wearing gloves or where the connector location makes standard jacking hardware difficult to access.
Available Contact Layouts
Glenair GMLM MasterLatch Micro-D connectors are available in six contact arrangements.
| Contact Layout | Typical Use |
| 9 Contacts | Compact signal connection |
| 15 Contacts | Small electronic modules |
| 21 Contacts | Medium-density signal wiring |
| 25 Contacts | Control and data interfaces |
| 31 Contacts | Higher-density harness designs |
| 37 Contacts | Multi-signal compact interconnection |
Ordering Configuration
Performance Specifications
Glenair GMLM MasterLatch Micro-D connectors are designed to meet demanding Micro-D connector performance requirements. The official specification lists the following performance values.
| Parameter | Specification |
| Current Rating | 3 A |
| Dielectric Withstanding Voltage | 600 VAC at sea level |
| Insulation Resistance | 5,000 megohms minimum |
| Contact Resistance | 8 milliohms maximum |
| Low-Level Contact Resistance | 32 milliohms maximum |
| Magnetic Permeability | 2 µ maximum |
| Operating Temperature | -55°C to +150°C |
| Shock / Vibration | 50 g / 20 g |
| Mating Force | 10 ounces × number of contacts |
The GMLM connector’s performance data is listed by Glenair as being per MIL-DTL-83513, with interface dimensions also following MIL-DTL-83513.
Typical Applications
Glenair GMLM MasterLatch Micro-D connectors are suitable for electronic systems where small size, reliable locking and fast maintenance access are required.
Typical applications include:
Aerospace electronic systems
Avionics equipment
Defense communication systems
Military control units
UAV and airborne platforms
Satellite and spacecraft electronics
Rugged industrial control equipment
Test and measurement systems
Compact electronic modules
Equipment panels with limited access space
The quick-release latch design makes the GMLM series especially useful in systems where secure mating is required but jackscrew operation is inconvenient.
GMLM vs. Standard Micro-D Connectors
| Item | GMLM MasterLatch Micro-D | Standard Micro-D Connector |
| Mating Retention | MasterLatch quick-release mechanism | Usually jackscrews or jackposts |
| Tool Requirement | Tool-free latch operation | Tools may be needed |
| Maintenance Access | Easier in restricted spaces | May require more clearance |
| Contact System | TwistPin contacts | TwistPin contacts depending on series |
| Contact Layouts | 9 to 37 contacts | Wider range depending on series |
| Best For | Fast service, limited access, secure latching | General Micro-D interconnect applications |
For applications that require frequent connection and disconnection, GMLM can reduce handling time while still maintaining secure mating.
FAQ
What is a Glenair GMLM MasterLatch connector?
Glenair GMLM is a MasterLatch quick-release locking Micro-D connector series. It uses a thumb latch mechanism to secure the plug and receptacle without relying on standard jackscrew operation.
What contact layouts are available for GMLM connectors?
Glenair GMLM MasterLatch connectors are available in 9, 15, 21, 25, 31 and 37 contact arrangements.
What is the main advantage of the MasterLatch design?
The MasterLatch design allows quick, secure and tool-free mating and unmating. It is useful when connectors are installed in restricted spaces or when fast maintenance access is required.
Are GMLM connectors suitable for aerospace and defense applications?
Yes. GMLM connectors use TwistPin contacts and are designed for high-reliability Micro-D applications, including aerospace, defense, avionics and rugged electronic systems.
Can DataStorageIC help with Glenair GMLM part number selection?
Yes. DataStorageIC can help customers review Glenair GMLM part numbers, contact layouts, shell plating, wire gauge, wire type and cable length for quotation and sourcing support.
DataStorageIC is a distributors for Glenair,If you need to know more about and purchase GLENAIR products, you can consult DataStorageIC customer service or fill out the RFQ.
