Magnetic Mating Interface
Confirm Pin count, contact allocation, magnet arrangement, connector shape, polarity control and mating direction.
A custom 4 pin magnetic charging cable with four contacts arranged in a single linear row inside an elongated rounded charging head. Designed for wearable-device integration, the Pin Map, voltage, continuous current, cable construction, contact travel, magnetic retention and device-side mating geometry are defined according to the approved project requirements.
The finished assembly must define the magnetic mating component, internal conductor arrangement, cable construction and the opposite-end connection as one complete electrical system.
Confirm Pin count, contact allocation, magnet arrangement, connector shape, polarity control and mating direction.
Define cable length, conductor count, wire specification, shielding requirements, jacket and flexibility.
Select USB, Type-C, DC plug, bare wire, terminal, PCB connection or another customized termination.
Confirm installation space, outlet direction, strain relief, exposed-contact state and user operation.
4 PIN WEARABLE MAGNETIC CHARGING CABLE
This 4 pin magnetic charging cable uses four electrical contact positions arranged in a single linear row within an elongated rounded charging head. The cable-side assembly is intended for integration with wearable electronic devices requiring a compact detachable charging interface.
Charging is the confirmed primary function. The four-contact Pin Map, power and return allocation, operating voltage, current capability, cable construction and device-side mating structure should be defined according to the approved project drawing.
Magnets primarily assist capture and retention during mating. Final position, alignment and seating should be established by the connector housing, mating surfaces and mechanical datums rather than magnetic attraction alone.
The charging head uses four contacts positioned in one straight row. This linear arrangement provides four project-defined electrical paths within a compact wearable charging interface.
Four contacts do not have one universal electrical assignment. The final Pin Map should follow the customer schematic, charging architecture and device-side contact layout.
Pin Count 4 Pin
Contact Layout Single row / linear
Head Geometry Elongated rounded housing
Primary Function Wearable-device charging
The four contacts should be assigned according to the approved electrical design rather than by physical position alone.
Possible project architectures may include charging power and return contacts, detection or identification contacts, or parallel power paths. These are planning examples only and do not define the final Pin Map of this product.
Pin 1–4 Functions → Defined by Approved Pin Map
Power / Return Allocation → To Be Confirmed
Detection / Identification Functions → Project-Specific
Cable-side and device-side drawings should use the same viewing direction and Pin 1 reference to prevent mirrored contact assignments.
If two or more contacts are connected in parallel for charging current, equal current sharing should not be assumed automatically.
Current distribution depends on conductor resistance, termination resistance, contact resistance, working compression, mating-pad condition and PCB routing.
The complete conductive path should therefore be validated before defining a continuous-current rating.
Source → Opposite-End Termination → Cable Conductors → 4-Contact Magnetic Head → Mating Pads → Device PCB → Charging Circuit → Battery / Load
Vdrop = I × Rpath
Ploss = I² × Rpath
A wearable charging interface competes for space with the battery, PCB, sensors, antenna, enclosure, strap and other internal structures.
The available X, Y and Z installation envelope should therefore be confirmed before the charging-head dimensions and device-side interface are finalized.
Charging-interface location should also be reviewed against device curvature, strap position, sensor windows, cable direction and how the wearable rests during charging.
The elongated linear contact layout can be evaluated for wearable products where a narrow charging area is available, but final suitability depends on the complete device drawing.
Magnetic attraction assists the cable head during approach and helps retain the charging interface after engagement.
Capture force, retention force, separation force and peel force describe different mechanical conditions and should be specified separately where required.
Final alignment, contact compression and seated position should be established by the mating housing and mechanical datums.
Stronger magnetic retention is not automatically better for a wearable product. The required force should be balanced with device mass, cable direction, housing strength and intended removal behavior.
Four electrical contact positions are visible, but the internal spring-loaded contact structure cannot be fully confirmed from the product image alone.
If spring-loaded pogo contacts are used, the approved drawing should separately define working stroke, total travel, spring force and installed compression.
Working stroke represents the intended operating compression. Total travel represents the available mechanical movement of the contact and should not be treated as the same parameter.
The connector housing should establish the final mechanical stop. Spring-loaded contacts should provide electrical connection and controlled Z-axis compliance rather than act as the primary structural stop.
The magnetic charging head is only one part of the complete cable assembly.
Cable length, conductor count, wire gauge, conductor material, cable jacket, flexibility and strain relief should be selected according to the approved charging and mechanical requirements.
USB-A, USB-C, bare wire, terminal, adapter or another opposite-end interface should only be stated after the actual cable configuration has been confirmed.
Wearable charging contacts may encounter perspiration, skin oils, cosmetics, moisture, cleaning agents, lint and repeated handling depending on the final device and use condition.
These exposure conditions should be defined before contact material, plating, housing material and validation requirements are finalized.
A compact magnetic interface does not automatically establish corrosion resistance or waterproof performance.
Any IP rating should apply only to a defined and tested complete assembly or device enclosure.
| Specification | Details |
|---|---|
| Product Type | 4 Pin Magnetic Charging Cable Assembly |
| Pin Count | 4 Pin |
| Primary Function | Charging |
| Application | Wearable Devices |
| Contact Layout | Single Row / Linear |
| Head Geometry | Elongated Rounded Housing |
| Pin Map | Defined by Approved Drawing |
| Power / Return Allocation | To Be Confirmed |
| Parallel Contact Architecture | To Be Confirmed |
| Contact Type | To Be Confirmed |
| Working Stroke | To Be Confirmed |
| Total Travel | To Be Confirmed |
| Cable Length | Project-Specific |
| Wire Gauge | To Be Confirmed |
| Opposite-End Termination | To Be Confirmed |
| Voltage | Project-Specific |
| Continuous Current | To Be Confirmed |
| Peak Current | To Be Confirmed |
| Current Capability | Validate Complete Conductive Path |
| Magnetic Function | Capture + Retention |
| Final Position / Alignment | Controlled by Mechanical Mating Geometry |
| Magnetic Retention | Project-Specific |
| Material / Plating | To Be Confirmed |
| Cycle Life | To Be Confirmed |
| Environmental Validation | Project-Specific |
| IP Rating | To Be Confirmed at Complete Assembly Level |
Explore related 4 Pin Magnetic Cable Connectors for other four-contact cable architectures.
This linear four-contact magnetic charging cable can be evaluated for wearable products requiring a compact detachable charging interface.
The four-contact architecture allows project-defined charging and auxiliary contact functions, but final contact allocation must follow the approved Pin Map.
Review the Smart Wearable Magnetic Charging Application Guide when defining charging location, device packaging, user interaction and environmental exposure.
It is a magnetic cable assembly using four electrical contacts at the wearable-device charging interface. This version uses a single linear contact row inside an elongated rounded charging head.
Contact functions are project-specific. They may be allocated to charging power, return, detection, identification or parallel power paths according to the approved Pin Map.
No. Pin count does not establish data compatibility or bandwidth. Any signal or data function must be validated through the Pin Map, return path, cable construction, contact geometry and complete device channel.
They can be evaluated for a parallel architecture, but equal current sharing should not be assumed. Contact resistance, compression, cable routing, conductor resistance and PCB paths must be reviewed together.
Current capability is project-specific and must be validated across the complete conductive path from the source and cable conductors through the magnetic interface to the device charging circuit.
Four electrical contact positions are visible, but the internal spring-loaded contact structure should be confirmed by the approved contact drawing before pogo-pin terminology and travel values are specified.
Capture, retention, separation and peel conditions should be reviewed separately according to device mass, cable direction, housing strength and the intended charging and removal behavior.
No IP rating should be inferred from the charging-head shape. Protection performance depends on the complete mating interface, wearable enclosure, sealing structure and defined test conditions.
Provide the four-contact Pin Map, voltage, continuous and peak current, cable length, wire gauge, opposite-end termination, available installation space, mating geometry, magnetic requirements and available device drawings.
CUSTOM WEARABLE CHARGING CABLE DEVELOPMENT
Send CTP your four-contact Pin Map, voltage, continuous and peak current, cable length, wire gauge, opposite-end termination, available X/Y/Z space, contact pitch, mating geometry, magnetic retention requirements and wearable-device drawings. Our engineering team can review the complete charging interface before quotation and sample development. Request Custom Quote & Samples
This product page presents a CTP magnetic cable assembly configuration for engineering reference. Final dimensions, electrical ratings, materials, magnet structure, sealing level and reliability targets are not universal values; they are confirmed against the approved drawing, installation condition and model-specific validation plan.
CTP reviews the application and prepares a drawing or specification for approval before sample production. Test scope, acceptance criteria and report format should identify the model, sample status, method, conditions, result and review date.
Yes. Customization can cover geometry, contact layout, materials, cable construction, magnetic structure, sealing and appearance. Feasibility depends on the application and approved specification.
No. Current, voltage, resistance, temperature rise and ingress-protection claims apply only to the identified model and stated test conditions.
Timing is confirmed after the drawing, materials, tooling, sample quantity, validation scope and production requirements have been reviewed.
A reference product image is not enough to define a cable assembly. Confirm the following information before drawing, sampling or quotation review.
The exact project route depends on whether an existing product can be used, modified or requires a new cable assembly design.
Confirm product scope, Pin Map, cable length, termination, quantity and application conditions.
Match magnetic contacts to conductors, source-side wiring and device-side functions.
Confirm dimensions, outlet direction, cable construction and required sample configuration.
Review electrical, mechanical and environmental conditions before production approval.
Submit the magnetic-end structure, electrical functions, cable length, conductor requirements, opposite-end interface, installation space and available drawings for project review.
Review related cable assemblies by contact count, shape, termination and project supply scope.
