Magnetic Mating Interface
Confirm Pin count, contact allocation, magnet arrangement, connector shape, polarity control and mating direction.
A custom 4 pin magnetic charging cable assembly with a compact flat charging head for wearable electronics and other detachable charging interfaces. The four electrical contacts are assigned according to the approved Pin Map, while voltage, current, cable construction, opposite-end termination, working stroke and magnetic retention are project-specific. Charging-current capability must be validated through the complete conductive path.
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 is a complete cable assembly designed around a compact flat charging head for wearable electronics and other detachable charging interfaces.
The four electrical contacts are assigned according to the approved Pin Map. Charging is the confirmed function of this product, while signal or data functions should only be specified after the contact allocation and complete electrical channel have been defined.
Magnets primarily assist capture and retention during mating. Final position, alignment and seating should be controlled by the mating housing and mechanical geometry, while the pogo contacts provide electrical contact and controlled Z-axis compliance.
The visible charging head uses a flat, rounded-rectangular housing with a side cable outlet. This type of architecture can be evaluated when a wearable product requires a detachable charging cable but has limited external connector space.
Pin Count Four electrical contact positions
Primary Function Wearable-device charging
Charging Head Flat molded magnetic cable head
Cable Outlet Side-exit cable structure visible
The approved drawing should identify Pin 1, viewing direction, polarity and the electrical function of each of the four contact positions.
Four pins do not automatically mean that all contacts are connected in parallel for charging. Depending on the charging system, contacts may be allocated to power, return, detection, control or other defined functions.
If multiple contacts are connected in parallel, total current capability should not be calculated by simply multiplying the capability of one contact by the number of parallel pins.
Contact resistance, conductor resistance, mating compression, PCB copper and mechanical tolerance can cause unequal current sharing. Parallel contact paths should therefore be validated in the complete charging assembly.
The magnetic structure assists the charging head during approach and helps retain the interface after engagement.
Capture force, retention force, separation force and peel force describe different mechanical conditions. The required magnetic behavior should be selected according to the wearable-device geometry, cable handling and intended release direction.
Final alignment and seating should be controlled by the mating housing, mechanical datums, guides and seating surfaces. Magnetic attraction alone should not define final contact compression.
The spring-loaded contacts should operate within the approved working stroke after the charging head reaches its intended mechanical seating position.
Working stroke and total travel are different parameters. Working stroke defines the intended operating compression, while total travel represents the available mechanical movement of the contact.
The charging-head thickness, device housing, PCB position, contact height and assembly tolerances should be considered together when defining the normal compression condition.
Pogo contacts should provide electrical contact and controlled compliance rather than act as the primary mechanical hard stop.
Charging-current capability cannot be determined from the number of pins, pogo contact diameter or charging-head size alone.
Power Source → Opposite-End Termination → Cable Conductors → Magnetic Charging Head → Pogo Contact Interface → Device-Side Contacts → Device PCB → Charging Circuit → Battery / Load
Vdrop = I × Rpath
Ploss = I² × Rpath
Cable length, conductor gauge, termination resistance, pogo contact resistance, device-side PCB copper, mating compression, duty cycle and temperature rise should be reviewed together before releasing a current rating.
Continuous current and peak current should also be defined separately when the charging system includes transient or pulsed conditions.
Charging is the confirmed function of this four-pin cable. The presence of four contacts does not automatically establish USB or another data protocol.
If signal or data functions are required, the complete channel should be reviewed, including Pin Map, return path, contact geometry, PCB transitions, cable conductor arrangement, shielding and the source and receiving electronics.
A supported data rate should only be stated after the complete electrical channel has been defined and validated.
The magnetic charging head is only one part of the finished cable assembly. Cable length, conductor count, wire gauge, outer jacket, strain relief and the opposite-end connection should be defined as one complete system.
USB-A, USB-C, DC plug, bare wire, terminal or another interface should only be stated after the approved project drawing confirms the actual opposite-end termination.
Wearable charging cables may also require review of cable routing, bending behavior and cable-exit direction because these conditions influence the mechanical loading of the charging head during normal use.
| Specification | Details |
|---|---|
| Product Type | 4 Pin Magnetic Charging Cable Assembly |
| Pin Count | 4 Pin |
| Primary Function | Charging |
| Application Direction | Wearable Electronics |
| Charging Head Form | Flat / Rounded-Rectangular |
| Cable Outlet | Side-Exit Cable Structure Visible |
| Magnetic Function | Capture + Retention |
| Final Position / Alignment | Controlled by Mechanical Mating Geometry |
| Pin Map | Defined by Approved Drawing |
| Parallel Contact Allocation | To Be Confirmed |
| Charging Function | Confirmed |
| Data / Signal Function | To Be Confirmed |
| 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 | Defined by Approved Drawing |
| Total Travel | To Be Confirmed |
| Spring Force | Project-Specific |
| Magnetic Retention | Project-Specific |
| Material / Plating | To Be Confirmed |
| Cycle Life | To Be Confirmed |
| Operating Temperature | To Be Confirmed |
| IP Rating | Not Claimed Without Complete Assembly Validation |
CTP can review the complete four-pin wearable charging cable architecture around the customer’s electrical, mechanical and cable requirements.
This 4 pin magnetic charging cable can be evaluated for wearable products that require a detachable charging interface and a compact charging-head footprint.
Application suitability depends on the approved Pin Map, charging requirements, charging-head dimensions, cable construction, mating geometry, magnetic behavior and environmental conditions.
Review the Smart Wearable Magnetic Charging Application Guide when defining a body-worn charging interface.
Wearable charging interfaces may be exposed to moisture, sweat, skin oils, dust and repeated handling, but the wearable application alone does not establish corrosion resistance or waterproof performance.
Materials, plating, housing construction and cable structure should be selected according to the actual environment and validated under defined test conditions.
An IP rating applies only when the complete charging interface and device enclosure have been defined and tested for the required protection level.
This product is a complete 4 pin magnetic charging cable assembly. The magnetic charging head is one part of a complete cable system that also includes conductors, strain relief, opposite-end termination and the device-side mating interface.
The exact function of each contact is defined by the approved Pin Map. Contacts may be assigned to power, return, detection, control or another project-specific electrical function.
No. Pin count alone does not establish charging-current capability. If contacts are connected in parallel, current sharing, conductor resistance, contact resistance, mating compression and temperature must be validated in the complete assembly.
Charging current is project-specific and must be evaluated across the complete conductive path, including the source termination, cable conductors, magnetic charging head, pogo contact interface, device PCB and charging circuit.
USB or another data function should not be assumed from the four-pin interface. Data capability can only be specified after the Pin Map and complete electrical channel have been defined and validated.
The magnetic structure primarily assists capture and retention. Final position, alignment and seating should be controlled by the mechanical mating geometry.
Working stroke is defined by the approved drawing and represents the intended operating compression. It should be distinguished from the total mechanical travel of the spring contact.
Yes. Cable length, conductor construction, cable outlet direction and opposite-end termination can be defined according to the approved project requirements.
No waterproof or sweat-resistance rating should be assumed from the charging-head appearance or wearable application. Environmental protection depends on the complete mating interface, device enclosure and validated sealing design.
Provide the Pin Map, voltage, continuous and peak current, cable length, wire gauge, opposite-end termination, working stroke, charging-head dimensions, magnetic requirements, device-side geometry and available 2D or 3D drawings.
CUSTOM WEARABLE CHARGING CABLE DEVELOPMENT
Send CTP your 4-pin Pin Map, voltage, continuous and peak charging current, cable length, wire gauge, opposite-end termination, charging-head dimensions, working stroke, magnetic 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.
