Magnetic Mating Interface
Confirm Pin count, contact allocation, magnet arrangement, connector shape, polarity control and mating direction.
A custom 4 pin round magnetic charging cable assembly with a circular cable-side magnetic head and separate device-side mating component. The four contacts are assigned according to the approved Pin Map, while cable length, opposite-end termination, working stroke, magnetic retention and charging current are project-specific. Current capability must be validated through the complete conductive path rather than inferred from pin count or contact size.
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 ROUND MAGNETIC CHARGING CABLE
This 4 pin round magnetic charging cable is a complete cable assembly with a circular cable-side magnetic head and a separate device-side mating component. The interface provides four electrical contact positions for a project-defined charging and power architecture.
The four contacts must be assigned through an approved Pin Map. Depending on the project, contacts may be allocated to power, return, detection, control or other defined functions. Pin count alone does not establish the supported charging current.
Magnets primarily assist capture and retention during mating. Final position, alignment and seating should be established by the circular housing and mechanical mating geometry, while the pogo contact structure provides electrical connection and controlled compliance.
The circular interface provides four contact positions within a compact round mating geometry. This architecture can support a customer-defined charging interface where the available mechanical envelope, cable outlet direction and electrical contact allocation are designed together.
Pin Count Four electrical contact positions
Interface Shape Round / circular magnetic interface
Primary Function Charging / power interface
Cable Architecture Molded cable-side magnetic head
The approved cable drawing should identify Pin 1, viewing direction, polarity and the electrical function of all four contact positions.
Four contacts do not automatically mean that all four pins are connected in parallel for charging. The design may use separate power, return, detection or control contacts depending on the system architecture.
If multiple contacts are connected in parallel for a power path, total current capability should not be calculated by simply multiplying the capability of one contact by the number of parallel contacts.
Contact resistance, PCB copper, conductor resistance, compression tolerance and temperature can affect current sharing between parallel contact paths. The complete assembly should therefore be validated under the intended operating condition.
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. The required magnetic behavior should be defined around the device structure, cable handling and intended release direction rather than by specifying the strongest possible magnetic force.
Final position and alignment should be established by the mating housing, mechanical datums, guides and seating surfaces. Magnetic attraction alone should not determine the final compression of the electrical contacts.
Spring-loaded contacts should reach the approved working stroke after the circular cable head and device-side component achieve their intended mechanical seating condition.
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 structure.
The selected working condition should account for contact height, housing dimensions, device-side mounting position, mating tolerance and the complete mechanical stack-up.
Pogo contacts should provide electrical contact and controlled Z-axis compliance rather than act as the primary mechanical hard stop.
Charging-current capability must be evaluated through the complete electrical path. It cannot be determined from the number of contacts, pogo pin diameter or connector size alone.
Power Source → Opposite-End Termination → Cable Conductors → Magnetic Cable Head → Pogo Contact Interface → Device-Side Contacts → Device PCB → Charging Circuit → Load / Battery
Vdrop = I × Rpath
Ploss = I² × Rpath
Cable length, conductor gauge, termination resistance, contact resistance, mating compression, device-side PCB copper, duty cycle and temperature rise should be reviewed together before a continuous-current rating is released.
Peak current should also be defined separately from continuous current when the charging system has transient or pulsed operating conditions.
The circular magnetic connector head is only one part of the finished charging cable. Cable length, conductor count, wire gauge, outer jacket, strain relief and the opposite-end termination should be defined as one complete electrical and mechanical system.
USB-A, USB-C, DC plug, bare wire, terminal or another custom interface should only be stated after the approved cable drawing confirms the required configuration.
Cable routing, repeated bending conditions and available outlet space should also be included during project review when the cable is used in a frequently handled or moving assembly.
| Specification | Details |
|---|---|
| Product Type | 4 Pin Round Magnetic Charging Cable |
| Pin Count | 4 Pin |
| Primary Function | Charging / Power |
| Interface Shape | Round / Circular |
| Contact Arrangement | Circular 4-Contact Interface |
| Cable-Side Interface | Molded Round Magnetic Charging Head |
| Device-Side Mating Component | Shown in Product Image; Supply Scope To Be Confirmed |
| 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 |
| Device-Side Mounting | To Be Confirmed |
| 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 round magnetic charging cable architecture around the customer’s electrical, mechanical and cable requirements.
Explore related Round Magnetic Cable Connectors for alternative circular cable architectures.
This 4 pin round magnetic charging cable can be evaluated for products that require a detachable charging connection together with a compact circular mating interface.
Application suitability depends on the approved Pin Map, voltage, charging current, cable construction, magnetic behavior, mechanical interface and environmental requirements.
Environmental performance should be specified and validated for the complete cable and device-side mating assembly.
Corrosion behavior, mating-cycle capability, cable bending life and operating-temperature capability depend on the exact materials, plating, cable construction and defined test conditions.
A round housing or recessed mating face does not establish a waterproof rating. An IP rating should only be claimed when the complete mated assembly and sealing structure have been defined and tested.
This product is a complete 4 pin round magnetic charging cable assembly. The magnetic connector head is one part of the cable system, which also includes the cable conductors, opposite-end termination and device-side mating interface.
The function of each contact is defined by the approved Pin Map. The four contacts may be allocated to power, return, detection, control or other project-specific electrical functions.
No. Pin count alone does not establish current capability. If contacts are connected in parallel, current sharing, contact resistance, cable resistance, mating compression and temperature must be evaluated across the complete assembly.
Charging current is project-specific and must be validated across the complete conductive path, including the source termination, cable conductors, magnetic interface, pogo contacts, device PCB and charging circuit.
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 available in the spring contact.
Signal or data functions should not be assumed from the four-pin interface. They can only be specified after the Pin Map and complete electrical channel requirements have been defined and validated.
Yes. Cable length, conductor construction and opposite-end termination can be defined according to the approved project requirements and cable drawing.
No IP rating should be assumed from the circular housing or contact layout. Environmental protection depends on the complete mating assembly and sealing structure and must be validated at assembly level.
Provide the Pin Map, voltage, continuous and peak current, cable length, wire gauge, opposite-end termination, working stroke, magnetic requirements, device-side geometry, environmental requirements and available 2D or 3D drawings.
CUSTOM ROUND MAGNETIC CHARGING CABLE DEVELOPMENT
Send CTP your 4-pin Pin Map, voltage, continuous and peak current requirements, cable length, wire gauge, opposite-end termination, working stroke, magnetic requirements and device-side drawings. Our engineering team can review the complete charging path and circular mating architecture 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.
