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 a low-profile oval mating interface and four contacts arranged in a single row. Designed for project-specific wearable and smart-device charging integration, the Pin Map, voltage, current capability, cable construction, working stroke, mating geometry and magnetic retention 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 OVAL MAGNETIC CHARGING CABLE
This 4 pin magnetic charging cable is a complete cable assembly with a low-profile oval mating interface and four electrical contacts arranged in one linear row. The compact architecture can be evaluated for smart watches, wearable electronics and other devices with limited charging-interface space.
The four contacts are assigned according to the approved Pin Map. Charging is the confirmed function of this product, while voltage, current capability, auxiliary contact functions, cable construction and opposite-end termination are project-specific.
Magnets primarily assist capture and retention during mating. Final position, alignment and seating should be controlled by the mating housing and mechanical geometry rather than magnetic attraction alone.
The visible product architecture combines a cable-side charging base with a separate elongated oval mating component. Four electrical contacts are positioned in one row on the charging base.
This low-profile arrangement can help integrate the magnetic charging interface into devices where connector height and available external surface area are limited.
Pin Count Four electrical contact positions
Contact Layout Single row / linear arrangement
Interface Shape Low-profile oval / pill-shaped geometry
Primary Function Project-defined charging interface
The approved drawing should identify Pin 1, viewing direction, contact pitch and the electrical function of all four contact positions.
A four-contact charging interface does not mean that all four contacts are automatically connected in parallel. Depending on the device architecture, contacts may be assigned to power, return, detection, identification or other project-specific functions.
If multiple contacts are assigned in parallel to the same power or return path, current sharing should be validated rather than assumed from the number of contacts.
The magnetic structure assists the two mating components during approach and helps retain the charging interface after engagement.
Capture force, retention force, separation force and peel force describe different mechanical conditions. A single undefined magnetic-force value should not be used to represent all four conditions.
Final position and alignment should be established by the housing geometry, mechanical datums and mating surfaces. Magnetic attraction alone should not define the final electrical contact condition.
Stronger magnetic retention is not automatically better. Retention and release behavior should be selected around device mass, cable direction, housing strength and intended user handling.
Four gold-colored contact positions are visible on the cable-side charging base. The exact internal spring-loaded contact structure should be confirmed by the approved contact drawing.
If pogo contacts are used, working stroke and total travel must be treated as different parameters. Working stroke defines the intended operating compression, while total travel represents the available mechanical movement of the contact.
The mating housing should establish the final seating position. Spring contacts should provide electrical connection and controlled Z-axis compliance rather than serve as the primary mechanical hard stop.
Charging-current capability cannot be determined from the four-pin count, contact appearance or magnetic retention alone.
Power Source → Opposite-End Termination → Cable Conductors → Magnetic Charging Base → Assigned Electrical Contacts → Mating Interface → Device PCB → Charging Circuit → Battery / Load
Vdrop = I × Rpath
Ploss = I² × Rpath
Cable length, wire gauge, termination resistance, contact resistance, mating compression, device-side PCB copper and temperature rise should be evaluated together before a continuous-current rating is released.
If multiple contacts are paralleled, contact resistance and mechanical tolerance may cause unequal current sharing and should be included in the validation plan.
The magnetic charging interface is only one part of the complete cable assembly. Cable construction should be selected together with the electrical and mechanical requirements of the finished wearable device.
Cable length, conductor count, wire gauge, jacket construction, flexibility, strain relief and opposite-end termination should be defined in the approved cable drawing.
USB-A, USB-C, bare wire, terminals or another opposite-end interface should only be stated after the actual cable configuration has been confirmed.
The low-profile oval mating architecture can be evaluated for wearable products that require a detachable charging interface within a limited installation envelope.
Final application suitability depends on the approved electrical architecture, mechanical mating geometry, cable construction, charging requirements and environmental conditions.
Wearable applications may involve repeated handling, moisture exposure, skin oils and frequent mating, but the intended application does not itself establish corrosion resistance, cycle life or waterproof performance.
Contact material, plating, housing materials, cable construction and sealing features should be selected for the defined environment and validated under project-specific conditions.
An IP rating should only be stated when the complete mated assembly, device enclosure and sealing architecture have been defined and tested.
| Specification | Details |
|---|---|
| Product Type | 4 Pin Oval Magnetic Charging Cable |
| Pin Count | 4 Pin |
| Primary Function | Charging |
| Contact Arrangement | Single Row / Linear |
| Interface Shape | Low-Profile Oval / Pill-Shaped |
| Cable-Side Interface | Integrated Magnetic Charging Base |
| Separate Mating Component | Visible; Supply Scope To Be Confirmed |
| Magnetic Function | Capture + Retention |
| Final Position / Alignment | Controlled by Mechanical Mating Geometry |
| Pin Map | Defined by Approved Drawing |
| Contact Type | To Be Confirmed |
| Charging Function | Confirmed |
| Data / Signal Function | To Be Confirmed |
| Application | Wearable / Smart Device Charging |
| Cable Length | Project-Specific |
| 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 |
| Working Stroke | To Be Confirmed |
| Total Travel | To Be Confirmed |
| Spring Force | To Be Confirmed |
| Magnetic Retention | Project-Specific |
| Separation / Peel Behavior | Project-Specific |
| Material / Plating | To Be Confirmed |
| Cycle Life | To Be Confirmed |
| Operating Temperature | To Be Confirmed |
| IP Rating | To Be Confirmed at Complete Assembly Level |
CTP can review the complete 4 pin oval magnetic charging cable around the customer’s electrical, mechanical, cable and device-integration requirements.
It is a magnetic charging cable assembly with four electrical contact positions and a low-profile oval mating interface. This version arranges the four contacts in one linear row.
Their exact functions are defined by the approved Pin Map. Contacts may be assigned to power, return, detection, identification or other project-specific functions.
Not necessarily. Parallel contact allocation must be defined by the electrical design. If contacts are paralleled, current sharing should be validated in the complete conductive path.
Charging current is project-specific and must be validated through the source termination, cable conductors, contact interface, device PCB and charging circuit.
A magnetic-force value should only be stated with a defined test direction and condition. Capture force, retention force, separation force and peel force should be distinguished when specifying the mating behavior.
No. Retention should be balanced with release behavior, cable direction, device mass, housing strength and expected user handling.
Working stroke should be defined by the approved contact drawing if spring-loaded contacts are used. Working stroke is different from total mechanical travel.
Yes. The interface dimensions, Pin Map, cable construction and mating geometry can be reviewed around a project-specific wearable design and approved device drawing.
No IP rating should be assumed from the oval housing or magnetic interface. Environmental protection depends on the complete mated assembly, enclosure and sealing architecture.
Provide the Pin Map, voltage, continuous and peak current, cable length, wire gauge, opposite-end termination, interface dimensions, working stroke, magnetic requirements, device-side drawings and expected project volume.
CUSTOM WEARABLE MAGNETIC CHARGING CABLE DEVELOPMENT
Send CTP your 4-pin Pin Map, voltage, continuous and peak current, cable length, wire gauge, opposite-end termination, available X/Y/Z space, mating geometry, contact requirements, magnetic retention and release requirements and device-side 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.
