01
Pin Map and Contact Functions
Define the function of each power, return, signal, control or detection contact.
CTP 8 Pin Single Row Magnetic Pogo Pin Connector Pair features eight inline electrical contacts, a spring-loaded pogo pin side, a flat target side and mounting ears with through-holes. The contacts can be assigned to power, return, detection, identification, control or project-specific signal functions according to the customer Pin Map. Final voltage, current, working stroke, magnetic retention, mating life, data capability 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 8 Pin Single Row Magnetic Pogo Pin Connector Pair combines eight inline electrical contacts, a spring-loaded pogo pin side, a flat target side and mounting ears with through-holes. The contacts can be assigned to project-specific power and signal functions. Pin count alone does not determine voltage, current, communication protocol, magnetic force, mating life or ingress protection.
This 8 pin magnetic pogo pin connector is designed for devices that require a removable multi-contact electrical interface with defined mechanical mounting points.
The connector pair uses eight contacts arranged in one straight row. One connector half contains spring-loaded pogo pins, while the opposing half provides flat mating targets.
Magnetic elements positioned beside the contact area can assist connector approach and seated retention. The elongated housing and side mounting ears allow the connector to be integrated into a customer enclosure, PCB assembly, dock, accessory or device module.
Final connector performance must be confirmed using the approved drawing, customer Pin Map, PCB layout, mounting structure and complete mating assembly.
| Connector Element | Visible Structure | Engineering Requirement |
|---|---|---|
| Contact Count | 8 inline electrical contacts | Define the function and electrical state of every contact |
| Pogo Pin Side | Eight spring-loaded contacts | Define working stroke, contact force and termination |
| Target Side | Eight flat mating contacts | Define target material, finish, flatness and support |
| Contact Layout | Single-row arrangement | Confirm contact pitch and target spacing by drawing |
| Magnetic Areas | Magnetic structures positioned beside the contact row | Define capture, seated retention and separation conditions |
| Mounting Ears | Side extensions with through-holes | Confirm screw, pin, rivet or locating function by drawing |
| Housing | Elongated insulating and metal structural components | Define grounding, insulation and customer-enclosure integration |
The connector provides eight conductive contact positions. Their functions must be assigned according to the host device, accessory circuit and required operating states.
Possible contact functions include:
Power return, signal return, shield and housing ground should not automatically be treated as the same electrical node.
The following allocations are examples only. The final Pin Map must be developed from the actual customer circuit.
| Interface Architecture | Example Contact Allocation | Primary Validation |
|---|---|---|
| Power and identification | Power, return, detection, identification and four control contacts | Power sequence, wrong-accessory response and contact order |
| Parallel power interface | Two positive, two return and four detection or signal contacts | Current sharing, voltage drop and individual temperature rise |
| Power and low-speed communication | Power pair plus six project-specific signal contacts | Logic voltage, reference paths, interference and recovery |
| Docking interface | Power, return, detection, identification and accessory control | Partial mating, exposed-contact state and removal under load |
| Service interface | Power, reset, detection and project-specific diagnostic contacts | Access control, fixture alignment and connection sequence |
Eight visible contacts do not automatically establish USB, UART, I2C, video or another communication protocol.
The complete communication channel may include:
Host Controller → Host PCB → Protection Components → Pogo Pin Contacts → Flat Targets → Accessory PCB → Accessory Controller
Communication capability may depend on:
Contact count and low DC resistance do not independently prove high-speed data performance.
The side holes may be used for screws, locating pins, rivets or another customer-defined mounting method. Their exact function should be confirmed using the product drawing.
The mounting structure should define:
The mounting holes can improve repeatable connector location only when the customer housing, fasteners and tolerance stack are properly controlled.
They should not automatically be described as providing perfect or foolproof positioning.
Pogo pins and mating targets should not carry the complete mechanical load of a removable accessory.
A preferred load path is:
Accessory → Mounting Features or Support Surfaces → Device Housing
rather than:
Accessory → Magnets → Pogo Pins → Targets → PCB
The mechanical design should consider:
Magnets can assist connector approach and retention, but the final contact position should be established by the housing, mounting features and mechanical stops.
| Interface Function | Recommended Control |
|---|---|
| Initial capture | Magnet arrangement and approach geometry |
| Orientation control | Asymmetric housing, mounting features and magnet polarity |
| Final alignment | Housing datums, mounting holes and mechanical guides |
| Pogo pin compression | Mechanical stops and complete tolerance stack |
| Seated retention | Magnets and customer-device support structure |
| Connector removal | Defined separation direction and release-force requirement |
Magnetic capture force, seated retention and separation force should be specified and measured separately.
A simplified working-stroke calculation is:
S = Hfree - Hseated
where:
The dimensional stack may include:
| Working-Stroke Condition | Possible Result |
|---|---|
| Insufficient compression | Intermittent power, unstable detection or resistance variation |
| Approved working stroke | Intended contact force and electrical condition |
| Excessive compression | Spring bottoming, target indentation, housing load or PCB stress |
| Unequal compression | Different contact resistance and uneven current distribution |
Some 8 pin applications may connect several contacts in parallel for positive power or return paths.
Parallel contacts do not automatically carry equal current. Distribution can vary because of:
Individual contact current and temperature should be measured under the maximum intended electrical load.
A simplified power-path resistance is:
Rpath = Rhost-PCB + Rtermination1 + Rpogo + Rinterface + Rtarget + Raccessory-PCB
The voltage drop is:
Vdrop = I × Rpath
The resistive power loss is:
Ploss = I² × Rpath
The project should define:
The connector current capability cannot be determined from the eight-pin layout or product appearance alone.
Magnetic attraction may retain the connector close to the intended position before all eight contacts reach their approved working stroke.
| Partial-Mating Condition | Possible Risk | Required Review |
|---|---|---|
| One end contacts first | Unexpected contact sequence | Approach angle and contact-height tolerance |
| Laterally offset mating | A pogo pin reaches an adjacent target | Contact pitch, target width and maximum offset |
| Magnetically retained but not seated | False detection or unstable power | Independent full-seating verification |
| Wrong orientation | Incorrect Pin Map or polarity state | Mechanical coding and magnetic polarization |
| Conductive contamination | Short circuit or leakage between contacts | Power control and foreign-object protection |
| Removal under load | Arcing, transient voltage or interrupted communication | Power-disable sequence and powered-endurance testing |
| Parameter | Product Definition |
|---|---|
| Product Type | 8 pin single row magnetic pogo pin connector pair |
| Contact Count | 8 electrical contacts |
| Contact Arrangement | Single-row inline layout |
| Mating Structure | Spring-loaded pogo pin side with flat target side |
| Mounting Structure | Side mounting ears with through-holes |
| Pin Map | Project-specific power, return, detection, identification and signal allocation |
| Overall Dimensions | Confirm using the approved product drawing |
| Contact Pitch | Confirm using the approved product drawing |
| Hole Diameter and Spacing | Confirm using the approved product 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 per contact through voltage-drop and temperature-rise testing |
| Contact Resistance | Report with test current, target, stroke and measurement method |
| Magnetic Performance | Capture, seated retention and separation force are measured separately |
| Mating Life | Defined by stroke, load, target, environment and acceptance criteria |
| Contact Finish | Confirm separately for pogo pins, targets and terminations |
| Ingress Protection | Applies only to a defined and tested connector or complete device assembly |
| Termination | PCB, FPC, wire or project-specific subassembly |
| Application | Possible Connector Role | Primary Engineering Focus |
|---|---|---|
| Industrial control module | Power, identification and multiple control signals | Vibration, mounting accuracy and signal allocation |
| Docking station | Charging, detection, accessory identification and communication | Partial mating, working stroke and power sequence |
| Portable electronic equipment | Removable power and project-specific signal interface | Connector retention, exposed contacts and service access |
| Smart-home device | Charging base, detachable module or accessory interface | Repeated mating, cleaning and fault protection |
| Test or calibration fixture | Power, detection and diagnostic contact interface | Mounting repeatability and contact maintenance |
| Custom consumer electronics | Proprietary multi-contact magnetic interface | Compatibility, enclosure integration and validation |
These applications are examples. Final suitability depends on the selected Pin Map, electrical load, mechanical structure and environmental conditions.
| Requirement | Recommended Evaluation |
|---|---|
| Pin Map | Confirm the function and electrical state of all eight contacts |
| Dimensions and Pitch | Verify contact pitch, target positions and overall dimensions |
| Mounting Holes | Verify hole diameter, spacing, fastener and locating function |
| Working Stroke | Verify minimum, nominal and maximum compression |
| Contact Resistance | Measure with defined current, target, stroke and sample condition |
| Voltage Drop | Measure the complete power path at the intended current |
| Temperature Rise | Evaluate individual contacts, PCB, termination and housing |
| Parallel Current Sharing | Measure individual contact current and temperature where applicable |
| Magnetic Capture | Evaluate approach and orientation behaviour |
| Retention and Release | Measure force in the intended use and removal directions |
| Partial Mating | Test tilted, offset and retained-but-unseated states |
| Wrong Orientation | Evaluate mechanical fit, Pin Map and electrical response |
| Short Circuit | Evaluate moisture, metal objects and adjacent-target bridging |
| Signal Operation | Verify protocol operation, interruption and reconnection |
| Mechanical Endurance | Use defined stroke, speed, target and acceptance criteria |
| Powered Endurance | Evaluate mating and separation under intended electrical load |
| Environmental Exposure | Test representative dust, moisture, vibration and cleaning conditions |
| Production Variation | Evaluate contacts, targets, housings, magnets and mounting-hole tolerances |
| Input | Information to Provide |
|---|---|
| Pin Map | Function of all eight electrical contacts |
| Electrical Conditions | Voltage, continuous current, peak current and signal types |
| Mechanical Space | Maximum length, width, height and restricted regions |
| Mounting Method | Screw, locating pin, rivet or customer-defined structure |
| Contact Pitch | Required pitch and target dimensions |
| Mating Direction | Approach, final seating and removal direction |
| Working Stroke | Minimum, nominal and maximum compression |
| Termination | PCB, FPC, wire or project-specific subassembly |
| Magnetic Requirements | Capture, seated retention and separation conditions |
| Environment | Temperature, moisture, dust, vibration and cleaning exposure |
| Durability | Mating frequency, powered removal and acceptance criteria |
| Project Files | 2D drawing, 3D model, schematic, PCB layout or device assembly |
| Commercial | Prototype quantity, annual forecast and project stage |
The product images indicate a spring-loaded pogo pin side and a flat target side. The final supplied scope should be confirmed in the quotation and approved drawing.
The connector uses a single-row inline contact layout. The exact pitch and target dimensions should be confirmed using the approved product drawing.
They may be used for screws, locating pins, rivets or another mounting method. Their exact function and dimensions must be defined by the drawing and customer assembly.
Yes, the contacts can be assigned to project-specific power, return, detection, identification and signal functions. The final Pin Map must be defined by the customer circuit.
Not necessarily. Some contacts may be allocated to power, return, detection, identification, grounding or parallel current paths.
No. USB compatibility depends on the complete controller, PCB routing, connector channel, protection components and protocol validation.
No universal electrical rating should be assumed. Voltage and current depend on the contact allocation, working stroke, termination, PCB routing and thermal environment.
No. An ingress-protection rating must apply to a defined and tested connector or complete device assembly in a specified mating state.
Initial capture, seated retention and separation force should be specified and measured separately in their defined directions.
Provide the eight-contact Pin Map, voltage, current, signal types, mounting method, available space, working stroke, magnetic requirements and available 2D or 3D drawings.
Review additional custom magnetic connector components for different contact counts and mechanical structures.
Submit the device model, Pin Map, electrical conditions, mounting requirements and available drawings through the Get Quote & Samples page .
CTP can review the eight-contact layout, mounting-hole structure, pogo pin working stroke, mating targets, magnetic arrangement, housing and PCB, FPC or wire termination. Final electrical ratings, communication performance, mating life, environmental protection and complete device 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 →
