01
Pin Map and Contact Functions
Define the function of each power, return, signal, control or detection contact.
CTP 1 Pin Compact Round Magnetic Pogo Pin Connector uses a single central spring-loaded electrical contact inside a compact circular metal housing with magnet-assisted mating. The single contact can be assigned to detection, identification, control, signal or another project-specific electrical function. If the connector is intended for power transfer, a separate return path must be defined in the customer circuit. Final dimensions, working stroke, contact force, voltage, current, magnetic retention, mating life and environmental performance must be confirmed using the approved connector 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 Compact Round Magnetic Pogo Pin Connector uses one central spring-loaded electrical contact inside a compact circular metal housing with magnet-assisted mating. The single contact can be assigned to detection, identification, control, signal or another project-specific electrical function. If power transfer is required, the complete return path must be defined separately in the customer circuit. Final dimensions, working stroke, contact force, electrical ratings, magnetic retention, mating life and environmental performance must be confirmed using the approved connector drawing and complete customer assembly.
This 1 pin round magnetic pogo pin connector is designed for compact electronic devices that require a removable single-contact electrical interface with magnet-assisted attachment.
The connector shown uses one central spring-loaded pogo pin positioned inside a compact circular housing. The surrounding structure provides the mechanical and magnetic interface used to bring the mating components together.
Because this is a single-contact connector, the electrical function of the center pogo pin must be clearly defined before product selection. The contact may be used for detection, identification, control, signal or another project-specific function.
If the connector is intended for power transfer, a separate electrical return path must be intentionally defined in the complete customer circuit.
“1 Pin” means that the connector contains one defined spring-loaded electrical contact.
A single pogo pin does not automatically create a complete positive and negative DC power circuit.
| Possible Function | Center Contact Role | Additional Requirement |
|---|---|---|
| Detection | Device-presence or seating detection | Electrical reference provided elsewhere in the circuit |
| Identification | Accessory or device identification | Reference path and identification circuit |
| Control | Project-specific control signal | Defined logic reference and protection |
| Signal | Project-specific electrical signal | Signal reference and electrical limits |
| Power | One side of the power path | A separate conductive return path is required |
| Test or Service | Programming, measurement or test node | Fixture reference or separate return contact |
The circular metal or magnetic structure surrounding the center contact should not automatically be treated as an electrical ground or return conductor.
Its function may be magnetic, mechanical, structural or electrical depending on the specific design.
If any surrounding metal structure is intended to provide the second electrical path, this must be explicitly defined in the approved schematic and mechanical drawing.
| Connector Element | Visible Structure | Engineering Requirement |
|---|---|---|
| Electrical Contact | One central spring-loaded pogo pin | Define electrical function, voltage and current |
| Contact Position | Centered within the circular interface | Confirm target position and allowable lateral offset |
| Contact Protection | Central contact located inside a recessed region | Confirm mechanical clearance and mating-target geometry |
| Connector Shape | Compact round housing | Confirm diameter, height and installation envelope |
| Outer Housing | Metal circular structure | Confirm mechanical, magnetic and electrical function by drawing |
| Magnetic Mating | Magnet-assisted attachment | Define capture, retention and separation requirements |
| Termination | Project-specific internal connection | Confirm PCB, FPC, wire or other termination by drawing |
Positioning the spring-loaded contact below or inside the surrounding mating surface can provide additional mechanical protection compared with a fully exposed pin.
The recessed structure can help:
The recessed structure does not eliminate the need to define the mating target size, final working stroke and maximum credible mating offset.
A circular connector can provide greater freedom in approach orientation than a keyed rectangular connector.
For a single center contact, rotation around the center axis may have relatively little effect on the position of the electrical contact. However, rotational freedom should not be assumed unless all surrounding structural, magnetic and electrical features support it.
The project should confirm:
Magnets can assist initial connector approach and attachment, but magnetic force should not be the only feature defining the final electrical contact position.
| Mating Function | Recommended Control |
|---|---|
| Initial Capture | Magnet arrangement and approach geometry |
| Centering | Housing geometry and mating surfaces |
| Final Electrical Position | Mechanical datums and target geometry |
| Pogo Pin Compression | Mechanical stop and dimensional tolerance stack |
| Seated Retention | Magnetic structure and customer mechanical support |
| Removal | Defined separation direction and required release force |
Capture force, seated retention and separation force should be defined separately because they describe different mechanical conditions.
The central pogo pin must operate within its approved compression range at the final seated position.
A simplified relationship is:
S = Hfree - Hseated
where:
The tolerance stack may include:
| Working-Stroke Condition | Possible Result |
|---|---|
| Insufficient Compression | Intermittent electrical contact or unstable resistance |
| Approved Working Stroke | Intended spring force and electrical contact condition |
| Excessive Compression | Spring bottoming, target damage or housing stress |
The current capability of a single pogo pin cannot be determined from the visible connector size or round housing 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 power loss is:
Ploss = I² × Rpath
Current capability should be confirmed through complete-path voltage-drop and temperature-rise testing.
A single spring-loaded contact alone does not create a complete two-wire charging path.
A charging application requires both a supply path and an electrical return path.
If this connector is used in a charging system, the project documentation should clearly identify:
A magnetic connector can be held close to the mating component before the center pogo pin reaches its intended working stroke.
| Condition | Possible Risk | Required Review |
|---|---|---|
| Magnetically Captured but Not Seated | Insufficient pogo pin compression | Mechanical stop and full-seating condition |
| Off-Center Mating | Intermittent contact or target miss | Target size and maximum credible offset |
| Conductive Foreign Object | Unexpected electrical path | Exposed-contact protection and current limiting |
| Magnetic Metal Debris | Contamination around the mating region | Cleaning and contamination evaluation |
| Removal Under Load | Transient voltage or contact arcing | Power-disable sequence and powered-endurance testing |
The circular housing does not independently establish an IP54 or other ingress-protection rating.
The complete environmental boundary may include:
Any ingress-protection claim should identify the exact tested connector or complete assembly and the applicable test condition.
| Parameter | Product Definition |
|---|---|
| Product Type | 1 pin compact round magnetic pogo pin connector |
| Electrical Contact Count | One central spring-loaded electrical contact |
| Connector Shape | Compact circular magnetic interface |
| Contact Structure | Central pogo pin located inside a recessed contact region |
| Contact Function | Project-specific detection, identification, control, signal or electrical function |
| Return Path | Must be separately defined when required by the electrical circuit |
| Overall Dimensions | Confirm using the approved mechanical drawing |
| Working Stroke | Confirm minimum, nominal and maximum pogo pin compression |
| Contact Force | Report at a defined working stroke |
| Voltage | Model- and circuit-specific |
| Continuous Current | Confirm through complete-path voltage-drop and temperature-rise testing |
| Contact Resistance | Report with test current, working stroke, mating target and measurement method |
| Magnetic Performance | Capture, seated retention and separation force are specified separately |
| Mating Life | Defined by working stroke, target, electrical state and acceptance criteria |
| Ingress Protection | Applies only to a defined and tested connector or complete device assembly |
| Application | Possible Connector Role | Primary Engineering Focus |
|---|---|---|
| Compact Electronics | Detection, identification or project-specific electrical interface | Available space and mating geometry |
| Wearable Electronics | Detection, control or project-specific contact | Compact size, exposed contacts and repeated mating |
| Smart-Home Devices | Presence detection or removable-module interface | Contact stability and user interaction |
| Portable Electronics | Single electrical function or service interface | Return path, magnetic retention and fault protection |
| Charging Docks | One element of a project-specific charging circuit | Complete supply and return-path architecture |
| Test Fixtures | Test, programming or detection contact | Contact repeatability and reference architecture |
These applications are examples. Final suitability depends on the electrical function, return-path architecture, mechanical structure and complete device validation.
| Requirement | Recommended Evaluation |
|---|---|
| Electrical Function | Define the exact purpose of the center contact |
| Return Path | Confirm the second conductive path where required |
| Working Stroke | Verify minimum, nominal and maximum pogo pin compression |
| Contact Resistance | Measure under a defined target, current and working stroke |
| Voltage Drop | Measure the complete electrical path where used for power |
| Temperature Rise | Evaluate the contact, termination and return path |
| Magnetic Capture | Evaluate connector approach and centering behaviour |
| Retention and Separation | Measure force in intended use and removal directions |
| Partial Mating | Test captured-but-unseated and off-center conditions |
| Foreign Objects | Evaluate metallic debris and conductive contamination |
| Mechanical Endurance | Use defined stroke, target, speed and acceptance criteria |
| Powered Endurance | Evaluate separation under intended electrical conditions |
| Environmental Exposure | Evaluate required temperature, moisture, dust and cleaning conditions |
| Input | Information to Provide |
|---|---|
| Contact Function | Power, detection, identification, control, test or signal |
| Return Path | Define the second conductive path where required |
| Electrical Conditions | Voltage, continuous current, peak current and signal type |
| Mechanical Space | Maximum diameter, height and restricted regions |
| Mating Target | Target diameter, height, material and surface requirement |
| Mating Direction | Approach, final seating and removal direction |
| Working Stroke | Minimum, nominal and maximum pogo pin compression |
| Magnetic Requirement | Capture, seated retention and separation conditions |
| Termination | PCB, FPC, wire or project-specific connection |
| Environment | Temperature, moisture, dust, vibration and cleaning exposure |
| Project Files | 2D drawing, 3D model, schematic, PCB layout or device assembly |
It is a compact magnetic connector with one defined spring-loaded electrical contact located near the center of a circular mating interface.
The contact can be assigned to detection, identification, control, signal, test or another project-specific electrical function.
Not by itself. A complete DC power circuit requires a separate return path. The return path must be intentionally defined in the customer electrical architecture.
It should not automatically be assumed to provide an electrical return path. Any conductive function of the surrounding structure must be explicitly defined in the approved drawing and schematic.
A recessed contact structure can help reduce direct side impact and allow the surrounding housing to provide mechanical guidance before the pogo pin reaches the mating target.
The center-contact geometry may allow rotational freedom, but the complete magnetic, structural and electrical design must be reviewed before rotational mating is permitted.
No universal electrical rating should be assumed. Current and voltage must be confirmed for the exact pogo pin, mating target, working stroke, termination, return path and thermal conditions.
No. An ingress-protection rating must apply to a defined and tested connector or complete customer assembly under stated conditions.
Provide the center-contact function, return-path architecture, voltage, current, available diameter and height, working stroke, mating target, magnetic requirements and available drawings.
Review additional custom magnetic connector components for different pin counts, dimensions and mating structures.
Submit the electrical function, return-path architecture, available space and project drawings through the Get Quote & Samples page .
CTP can review the single-contact architecture, pogo pin working stroke, mating target, compact round housing, magnetic arrangement and PCB, FPC or wire termination. Final electrical ratings, magnetic retention, 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 →
