4-Pin LEMO-Compatible to 3-Lead 3.9/4.0mm ECG Snap Cable
This shielded ECG lead-wire assembly provides a 1-to-3 connection between compatible patient-monitoring equipment and snap-style electrode interfaces. The device side uses a 4-pin LEMO-compatible locking push-pull connector, while the electrode side terminates in three 3.9/4.0mm female snap connectors.
The cable is designed for OEM and ODM projects where connector keying, pin assignment, cable length, branch dimensions and electrode-side connections need to match a specific monitoring system. Heymed Medical can support connector review, pinout confirmation, cable structure development, prototyping and controlled production.
Locking Push-Pull Interface for Patient Monitoring Equipment
The equipment-side connector uses a locking push-pull structure designed to provide a detachable connection while maintaining mechanical retention after mating. This type of interface is useful for monitoring equipment where secure connection and repeatable cable handling are important.
Connector appearance alone does not confirm compatibility. Connector series, shell dimensions, keying direction, contact layout, mating depth and electrical pin assignment must all correspond to the target equipment.
For projects using a different device-side architecture, a USB-C 90° to 3-Lead 4.0mm ECG Female Snap Electrode Cable provides another example of how the same electrode-side concept can be adapted around a different equipment interface.
Independent 3.9/4.0mm Female Snap Electrode Connections
The 1-to-3 lead architecture separates the equipment-side connection into three individual electrode leads. Each branch is designed around a 3.9/4.0mm female snap interface for mating with compatible electrode studs.
Lead identification, branch dimensions and channel sequence can be configured according to the customer's approved wiring definition. Nominal snap diameter alone does not guarantee compatibility, so mating geometry, insertion depth and retention characteristics should be checked against the intended electrode before production.
For products requiring another compact equipment-side connector, the 4-Pin Spring-Loaded Contact to 3-Lead 4.0mm ECG Snap Cable provides an alternative device-interface structure for related monitoring applications.
Shielded Cable Structure for Biosignal Connection
The standard product uses a shielded 24AWG cable structure with a nominal cable diameter of approximately 2.5mm. Shielding can be incorporated into the cable design to help manage external electrical interference within the complete monitoring system.
Final signal performance depends on more than the cable alone. Shield termination, grounding method, conductor arrangement, cable length, equipment input design and the surrounding electrical environment all influence the complete signal path.
Cable jacket material, shielding construction, conductor specification and strain relief can therefore be reviewed together with the finished-device requirements rather than treated as fixed independent parameters.
Pinout Must Match the Actual Monitoring Device
A 4-pin connector does not automatically determine how the individual ECG leads should be wired. Devices with mechanically similar connectors may use different contact assignments, signal definitions or channel sequences.
Heymed Medical can review device drawings, PCB definitions, pinout tables, connector specifications or an existing reference cable before prototype development. The relationship between the device-side contacts and individual snap leads can then be confirmed according to the approved equipment architecture.
Additional ECG connector structures, channel configurations and monitoring lead wires can also be reviewed through our ECG Cables & Lead Wires range.
Key Customization Options
Device connector: Connector series, shell size, keying, mating structure and project-specific interface requirements.
Pin assignment: Device-side contact mapping and individual electrode-channel definition according to the approved drawing.
Electrode interface: 3.9/4.0mm female snap geometry or other project-specific electrode connectors.
Cable configuration: Main cable length, individual branch length, breakout position and routing can be customized.
Cable construction: Conductor specification, shielding, jacket material, strain relief and overmold structure can be reviewed according to the target equipment.
Identification and packaging: Lead colors, labels, markings, logo and OEM/ODM packaging can be developed according to project requirements.
Developed as a Complete Device-to-Electrode Cable Assembly
For patient-monitoring equipment, the device connector, cable construction and electrode-side interface should be considered as one complete connection system. Mechanical fit alone is not sufficient; pinout, channel mapping, shielding and snap compatibility should all be reviewed together.
Where a project requires a different connector, lead count or cable architecture, Heymed Medical can develop the assembly through our Custom Medical Cable Assemblies engineering and manufacturing capability.
From Engineering Sample to OEM/ODM Production
Development can begin from a monitoring-device model, connector drawing, pinout definition, cable specification or existing reference sample. Our engineering team can review the electrical and mechanical interface before preparing a prototype.
During sample development, connector mating, keying, pin-to-lead continuity, snap engagement, cable dimensions, shielding structure and strain relief can be checked against the approved project requirements.
Once the configuration is confirmed, conductor materials, cable construction, molding, lead identification, inspection and packaging can be transferred into repeatable OEM/ODM production.
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