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Pin Map and Contact Functions
Define the function of each power, return, signal, control or detection contact.
CTP 1 Pin Round High-Retention Magnetic Pogo Pin Connector Pair combines a central spring-loaded electrical contact with a large circular magnetic mating structure for applications requiring stronger seated retention in a compact interface. The single electrical contact can be assigned to detection, identification, signal or another project-specific function. If used for power transfer, the complete return path must be defined separately in the customer circuit. Connector diameter, working stroke, capture force, seated retention, separation force, electrical ratings and environmental performance are confirmed according to the approved drawing and complete customer assembly.
Product specifications should be reviewed together with the customer device, PCB, electrical assignment and mechanical mating conditions.
Define the function of each power, return, signal, control or detection contact.
Provide voltage, continuous current, peak current and required signal conditions.
Provide available length, width, height, PCB area and required mating orientation.
Provide application, expected quantity, environment and customer validation requirements.
Review the product-specific description, technical parameters, contact arrangement, mechanical structure and project conditions below.
Engineering Summary: The CTP 1 Pin Round High-Retention Magnetic Pogo Pin Connector Pair combines one central spring-loaded electrical contact with a large circular magnetic mating structure. It is intended for projects where stronger seated retention is required while maintaining a compact removable interface. Capture force, seated retention, separation force, working stroke, electrical ratings and environmental performance must be defined for the approved connector and complete customer assembly.
This 1 pin round magnetic pogo pin connector is designed for applications where a compact electrical interface requires stronger magnetic retention than a conventional low-force magnetic connector.
One connector half contains a central spring-loaded pogo pin contact, while the mating half provides the corresponding contact surface. A circular magnetic structure surrounds the electrical contact region and assists connector capture and seated retention.
The product should not be selected using magnetic force alone. The correct interface must balance magnetic retention, user removal force, pogo pin working stroke, mechanical alignment and the structural strength of the customer device.
Standard magnetic connectors are often optimized for convenient attachment and quick release. Some devices, however, require greater resistance to accidental separation.
Higher retention may be useful when the interface is exposed to:
High retention does not mean that the strongest possible magnet should always be selected. Excessive magnetic force can increase removal effort, housing load and impact during mating.
“Magnetic force” is often listed as one value, but several different mechanical conditions should be distinguished during connector development.
| Magnetic Parameter | Engineering Meaning | Why It Matters |
|---|---|---|
| Capture Force | Attraction during connector approach | Determines how easily the mating parts pull toward each other |
| Capture Distance | Distance at which magnetic attraction becomes functionally useful | Affects blind mating behaviour |
| Seated Retention Force | Force maintaining the connector in the fully seated position | Determines resistance to vibration and accidental separation |
| Axial Separation Force | Force required to pull the connector apart in the normal direction | Defines user removal effort |
| Off-Axis Release Behaviour | Connector response to peeling, tilting or lateral pull | May differ greatly from straight axial pull |
These values should be measured using a defined connector orientation, separation speed, mechanical support and test fixture.
Increasing seated retention can improve connector stability, but it can also increase mechanical loads during removal.
The project should therefore define both:
The correct value depends on device mass, cable direction, installation orientation and user interaction.
| Retention Too Low | Balanced Retention | Retention Too High |
|---|---|---|
| Unexpected disconnection | Stable attachment during intended use | Excessive removal effort |
| Intermittent contact | Controlled pogo pin compression | Higher housing and PCB load |
| Poor vibration stability | Repeatable seated position | Higher mating impact |
The connector contains one defined spring-loaded electrical contact located near the center of the round interface.
A single contact can support project-specific functions such as:
If the connector is used for DC power transfer, a complete electrical circuit requires a separate return path.
The surrounding magnetic ring or metal structure should not automatically be assumed to provide that return path unless its electrical function is explicitly defined in the approved drawing and schematic.
A circular connector can simplify mechanical approach because the outer housing does not inherently require the same angular orientation as a rectangular connector.
However, rotational freedom must be reviewed together with the electrical design.
For a single central contact, rotation may have little effect on the electrical contact position. Other structural or electrical elements may still require controlled orientation.
The project should review:
Strong magnets can pull the connector halves together, but magnetic force should not be used as the only feature controlling final pogo pin compression.
| Interface Function | Recommended Control |
|---|---|
| Initial Capture | Magnet layout and approach geometry |
| Final Centering | Housing surfaces and mechanical datums |
| Pogo Pin Compression | Mechanical stops and dimensional stack |
| Seated Retention | Magnetic structure plus customer mechanical support |
| Removal | Defined axial, peel or lateral release direction |
The central spring-loaded contact must remain inside its approved working stroke when the connector reaches the final seated position.
A simplified working-stroke relationship is:
S = Hfree - Hseated
where:
The complete tolerance stack may include:
| Working-Stroke Condition | Possible Result |
|---|---|
| Insufficient Compression | Intermittent contact or unstable resistance |
| Approved Working Stroke | Intended contact force and electrical condition |
| Excessive Compression | Spring bottoming, target damage or structural load |
A stronger magnetic system can accelerate the connector halves during the final part of the mating movement.
The mechanical design should therefore evaluate whether repeated magnetic impact transfers excessive force into:
Mechanical stops and housing contact surfaces should carry the structural load whenever possible rather than allowing the pogo pin itself to act as the mechanical stop.
The current capability of a single pogo pin cannot be established from the visible connector diameter or magnetic size alone.
Electrical performance depends on:
A simplified electrical path is:
Rpath = Rsource + Rtermination + Rpogo + Rinterface + Rtarget + Rreturn
The voltage drop is:
Vdrop = I × Rpath
The resistive loss is:
Ploss = I² × Rpath
Current capability should be confirmed through voltage-drop and temperature-rise testing of the complete electrical path.
Strong magnetic attraction can retain the mating part close to the device even when the connector has not reached the intended final seated position.
| Condition | Possible Risk | Required Review |
|---|---|---|
| Captured but Not Fully Seated | Insufficient pogo pin compression | Mechanical stop and full-seating condition |
| Off-Center Mating | Intermittent electrical contact | Target diameter and centering geometry |
| Magnetic Foreign Object | Metal object attracted to the mating area | Exposed-contact and contamination evaluation |
| Removal Under Electrical Load | Transient voltage or contact arcing | Power-disable sequence and powered endurance |
| Parameter | Product Definition |
|---|---|
| Product Type | 1 pin round high-retention magnetic pogo pin connector pair |
| Electrical Contacts | One central spring-loaded contact |
| Connector Shape | Round magnetic mating interface |
| Nominal Diameter | Confirm using the approved drawing |
| Contact Function | Project-specific electrical function |
| Return Path | Must be separately defined where required by the circuit |
| Working Stroke | Confirm minimum, nominal and maximum compression |
| Contact Force | Report at a defined working stroke |
| Capture Force | Confirm using a defined approach and measurement condition |
| Seated Retention | Confirm at the final mated position |
| Separation Force | Confirm in the defined release direction |
| Voltage | Model- and circuit-specific |
| Continuous Current | Confirm through voltage-drop and temperature-rise testing |
| Contact Resistance | Report with test current, stroke and mating target |
| Mating Life | Defined by stroke, electrical load, target and acceptance criteria |
| Environmental Protection | Applies only to a defined and tested connector or complete assembly |
| Application | Possible Connector Role | Primary Engineering Focus |
|---|---|---|
| Wearable Electronics | Detection, identification or project-specific contact | Compact size and repeated mating |
| Portable Electronics | Single-contact removable interface | Retention, return path and user removal |
| Vertical Docking Equipment | High-retention magnetic attachment | Device mass, vibration and separation force |
| Charging Docks | One element of a project-specific power interface | Complete circuit and thermal validation |
| Industrial Handheld Devices | Detection, service or removable electrical contact | Vibration and accidental separation |
| Custom Electronic Modules | Project-specific magnetic connection | Retention and mechanical integration |
These applications are examples. Final suitability depends on the electrical architecture, required retention, user-removal force and complete mechanical design.
| Requirement | Recommended Evaluation |
|---|---|
| Connector Diameter | Confirm the actual outer diameter using the approved drawing |
| Contact Function | Define the electrical function of the central contact |
| Return Path | Define the complete circuit where power is transferred |
| Working Stroke | Verify minimum, nominal and maximum pogo pin compression |
| Contact Resistance | Measure using a defined target and working stroke |
| Voltage Drop | Measure the complete electrical path where applicable |
| Temperature Rise | Evaluate the contact, termination and return path |
| Capture Force | Measure during connector approach |
| Seated Retention | Measure at the fully seated position |
| Separation Force | Measure axial and relevant off-axis release conditions |
| Mating Impact | Evaluate repeated magnetic snap-in loads |
| Partial Mating | Test captured-but-unseated and off-center conditions |
| Foreign Object | Evaluate attracted metallic contamination where relevant |
| Mechanical Endurance | Use defined stroke, target, speed and acceptance criteria |
| Powered Endurance | Evaluate separation under intended electrical conditions |
| Input | Information to Provide |
|---|---|
| Electrical Function | Power, detection, identification, control, service or signal |
| Return Path | Define the second conductive path where required |
| Voltage and Current | Continuous and peak electrical conditions |
| Connector Size | Required diameter and maximum installation height |
| Required Retention | Minimum seated retention and maximum acceptable release force |
| Installation Orientation | Horizontal, vertical or project-specific |
| Device or Accessory Mass | Mass supported by or acting on the connector interface |
| Working Stroke | Minimum, nominal and maximum pogo pin compression |
| Termination | PCB, FPC, wire or project-specific connection |
| Environment | Temperature, moisture, vibration, dust and cleaning conditions |
| Project Files | 2D drawing, 3D model, schematic or device assembly |
It is a magnetic spring-contact connector developed for applications that require greater resistance to accidental separation. The actual retention requirement should be defined and measured for the complete mating assembly.
No. Higher magnetic retention can improve attachment stability but can also increase user removal force, mating impact and mechanical load on the connector housing.
Capture force, seated retention and separation force should be defined separately under stated measurement conditions.
Not by itself. A complete DC circuit requires a separate return path, which must be intentionally defined in the customer electrical architecture.
It should not be assumed to provide electrical return. Any conductive function must be explicitly defined in the approved drawing and schematic.
The nominal diameter should be confirmed using the approved mechanical drawing. Product appearance alone should not be used to establish the dimensional specification.
No. An ingress-protection rating must apply to a defined and tested connector or complete customer assembly under stated conditions.
Provide the electrical function, return-path architecture, required connector diameter, voltage, current, working stroke, required retention, removal direction and available drawings.
Review additional custom magnetic connector components for different pin counts, dimensions and magnetic structures.
Submit the required magnetic retention, electrical function, available space and project drawings through the Get Quote & Samples page .
CTP can review the single-contact architecture, connector diameter, pogo pin working stroke, mating target, magnetic retention structure and PCB, FPC or wire termination. Final electrical ratings, capture force, seated retention, separation force, mating life and environmental performance must be confirmed through approved drawings and project-specific validation.
This product page presents a CTP magnetic connector 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.
Submit your Pin Map, electrical requirements, available space, mating structure and project quantity for connector selection or custom development review.
Use the following engineering guides to compare contact count, contact allocation and connector layout before confirming the final product or customized design.
Review the complete selection path from contact count and electrical functions to connector shape.
View Main Guide →Compare one-contact special structures, complete two-contact circuits and third-contact functions.
Compare Low-Pin Designs →Determine whether four contacts are sufficient or whether a defined fifth electrical path is required.
Compare 4 Pin and 5 Pin →Calculate the contact budget and compare six-contact, multi-row and customized contact-array structures.
Compare High-Pin Designs →
