Resources Views: 0 Author: Site Editor Publish Time: 2026-08-18 Origin: Site
A push-pull connector is not complete when the housing and contacts have been selected. The contacts must also be connected correctly to the cable, wire harness or circuit board.
This connection process is known as connector termination. It affects electrical continuity, mechanical strength, assembly efficiency, serviceability and long-term reliability.
Different applications may require different termination methods. A compact medical device may need a flexible soldered cable assembly. A high-volume harness project may benefit from crimp termination. A panel-mounted electronic module may require direct PCB termination.
For this reason, termination should be considered during the early connector design stage rather than after the connector model has already been finalized. The broader push-pull self-locking connector selection guide can help engineers evaluate connector size, contact number, cable requirements and installation conditions together.
The main termination methods for push-pull connectors include solder termination, crimp termination and PCB termination. QM Connectors primarily uses solder termination, especially for customized connector and cable assembly projects. Solder-cup termination is suitable for flexible wiring, prototype development, small-batch production and complex cable layouts. The final choice depends on wire gauge, contact layout, signal or power requirements, assembly volume, maintenance needs and equipment structure.
Connector termination is the method used to join the connector contacts to external conductors.
The external conductor may be:
A single insulated wire
A multi-core cable
A shielded cable
A flexible cable
A PCB
A custom wire harness
Another connector or interconnection component
The termination method must create a stable electrical path and provide enough mechanical support to withstand handling, vibration, cable movement and repeated equipment operation.
A suitable termination method should provide:
Low and stable electrical resistance
Reliable mechanical connection
Compatibility with the contact design
Appropriate strain relief
Consistent production quality
Efficient assembly and inspection
Suitable repair or replacement options
For electrical connectors, the term solder termination is normally used when conductors are joined using solder. This is different from mechanical welding processes.
The most common termination methods include:
Solder termination
Crimp termination
PCB termination
Wire-wrap or specialized termination methods for selected applications
Among these options, solder termination is especially flexible for custom push-pull connector assemblies.
Termination Method | Main Advantages | Typical Application |
|---|---|---|
Solder termination | Flexible wiring, compact layout and suitable for custom cable assemblies | Medical, testing, industrial and prototype equipment |
Crimp termination | Consistent high-volume production and fast automated assembly | Standardized wire harnesses and mass production |
PCB termination | Direct connection to a circuit board and compact equipment integration | Electronic modules and panel-mounted devices |
Specialized termination | Adapted to specific electrical or mechanical requirements | Special-purpose or application-specific systems |
The correct choice depends on the connector structure, cable design, production volume and equipment requirements.
Solder termination connects the conductor to the connector contact by applying solder to the prepared wire and contact termination area.
In many circular push-pull connectors, the contact includes a solder cup or solder termination area. The stripped wire is inserted into the contact area and soldered to form the electrical and mechanical connection.
Solder termination can provide:
Flexible wire routing
Support for customized pin assignments
Compatibility with small and complex connectors
Convenient prototype development
Suitability for small-batch production
Easy adaptation to different cable lengths
Good integration with custom cable assemblies
Practical support for mixed signal and power wiring
Solder termination is particularly useful when the cable configuration is not fully standardized or when the customer requires a specific pinout, cable length, wire specification or connector orientation.
A solder cup is a small recessed area at the rear of a connector contact. It is designed to receive the stripped conductor before soldering.
Solder-cup termination is often used when:
The connector has a compact contact layout
The cable includes multiple individual wires
The pin arrangement is customized
Cable length varies between equipment models
The project requires sample or prototype assemblies
The connector must be integrated into a custom harness
The wire should be properly stripped, positioned and supported before soldering. Excessive solder, insufficient solder or poor wire positioning may affect electrical reliability and assembly quality.
Solder termination is often suitable for:
Medical equipment
Laboratory instruments
Test and measurement systems
Industrial control equipment
Portable electronic devices
Communication equipment
Custom cable assemblies
Prototype and small-batch projects
High-density signal connectors
QM Connectors primarily uses solder termination for its connector and cable assembly solutions. Customers can also obtain custom connector-matching cable assemblies and wire soldering support according to cable length, wire gauge, pin layout and equipment requirements.
Solder termination provides flexibility for customized connector projects.
Push-pull connector applications often involve different contact numbers, cable diameters, wire layouts, installation directions and equipment interfaces. A soldered cable assembly can be adjusted according to these project-specific requirements.
Solder termination allows the wiring arrangement to be adapted to the customer’s circuit and equipment layout.
This is helpful when the project requires:
Custom pin assignments
Mixed power and signal circuits
Shielding or grounding wires
Different wire colors
Different cable lengths
Special cable exit directions
Multiple connector sizes within one system
Many B2B connector projects begin with prototypes or small production runs. At this stage, the wiring design may still be adjusted according to testing results and equipment integration.
Solder termination allows the cable assembly to be modified without requiring complex dedicated crimp tooling. This can make it practical for custom development and project-based production.
Some precision connectors use small contacts and fine wires. A controlled soldering process can support compact cable assemblies where space is limited.
The wire size, contact size, soldering temperature and assembly process must be matched carefully. For very fine wires, process control is especially important because excessive heat or mechanical stress may damage the conductor or insulation.
Solder termination can be combined with cable preparation, wire routing, shielding, strain relief and final inspection.
This gives customers the option to source a complete connector and cable assembly instead of managing connector termination and cable integration separately.
PCB termination connects the connector contacts directly to a printed circuit board.
This method is often used when the connector is mounted directly on an electronic module or device control board.
PCB termination can provide:
Direct electrical connection
Compact equipment integration
Reduced external wiring
Simplified internal cable routing
Consistent board-level installation
Efficient assembly in standardized products
PCB termination may be suitable for:
Electronic control modules
Test instruments
Compact equipment
Panel-mounted devices
Communication systems
Integrated circuit assemblies
Products with fixed internal layouts
However, the PCB footprint, contact position, soldering process, mechanical support and connector mating force must be evaluated together.
The connector should not rely only on the PCB solder joints to withstand cable pulling or external mechanical stress. Appropriate panel support, mounting hardware or strain relief may be required.
Crimp termination joins the conductor to the contact by mechanically compressing the contact around the wire.
A properly designed crimp connection can provide consistent electrical and mechanical performance, especially in standardized wire harness production.
Crimp termination can provide:
Fast production cycle
Consistent repeatability
Suitability for automated assembly
Good compatibility with standardized wire harnesses
No soldering heat
Efficient high-volume production
Crimp termination may require:
Dedicated crimp contacts
Application-specific crimp tooling
Correct wire preparation
Accurate crimp-height control
Pull-force testing
Additional tooling investment
Strict compatibility between wire and contact
For projects with a stable design and high production volume, crimping can be an efficient solution. For highly customized or frequently modified projects, solder termination may offer greater flexibility.
Selection Factor | Solder Termination | Crimp Termination | PCB Termination |
|---|---|---|---|
Wiring flexibility | High | Medium | Low to medium |
Prototype suitability | Excellent | Limited by tooling | Suitable for fixed PCB designs |
High-volume automation | Medium | Excellent | Excellent when standardized |
Custom pin layouts | Excellent | Good when matching contacts are available | Depends on PCB design |
Cable replacement | Relatively convenient | Convenient after proper harness design | Usually requires module-level service |
Heat during assembly | Required | Not required | Required during PCB soldering |
Tooling requirement | Moderate | Often higher | Depends on board assembly process |
Best suited for | Custom cable assemblies and small batches | Standardized harness production | Integrated electronic modules |
There is no universally best termination method. The correct option depends on the product design, assembly process, production volume and maintenance requirements.
Solder termination quality depends on both the material and the process.
The wire should be stripped to the correct length without damaging the conductor strands or insulation.
Important factors include:
Wire gauge
Strip length
Conductor condition
Insulation clearance
Wire positioning
Tinning requirements
Poor wire preparation may lead to weak solder joints, exposed conductors or accidental contact between adjacent pins.
The soldering temperature and contact time should be controlled according to the contact material, wire size and soldering process.
Excessive heat may damage:
Wire insulation
Connector insulator
Contact plating
Nearby seals
Sensitive components
Insufficient heat may lead to incomplete solder flow or a weak joint.
A reliable solder joint should have:
Adequate solder coverage
Good wetting
Stable wire positioning
No visible cracks
No excessive solder accumulation
No loose conductor strands
No unwanted contact with adjacent terminals
Both visual inspection and electrical testing may be used to verify the connection.
The solder joint should not be used as the only mechanical support for the cable.
A suitable strain-relief structure can help prevent the soldered connection from being damaged by:
Cable pulling
Repeated bending
Vibration
Twisting
Equipment movement
Accidental impact
Cable jacket design, bend relief, overmolding or other mechanical support may be considered according to the application.
After termination, the completed assembly should be checked for:
Continuity
Short circuits
Pinout accuracy
Contact resistance
Insulation resistance
Signal integrity when required
Cable polarity
Shielding connection
Mating and unmating performance
Testing should be based on the connector’s electrical and mechanical requirements.
When requesting a push-pull connector or cable assembly, customers should provide as much of the following information as possible:
Connector model or reference drawing
Contact number
Pin layout
Cable length
Wire gauge
Wire insulation material
Signal or power requirements
Rated current and voltage
Shielding requirements
Cable exit direction
Installation space
Required mating cycles
Operating temperature
Waterproof or environmental requirements
Prototype or production quantity
Target delivery schedule
A wiring diagram or cable assembly drawing is especially helpful for projects with customized pin assignments.
For existing equipment replacement projects, customers may also provide an original connector sample, product photograph or mating interface drawing.
QM Connectors primarily uses solder termination for customized connector and cable assembly projects.
The soldering process can be adapted to different connector structures, wire specifications, pin layouts and equipment requirements. QM also provides connector-matching cable assemblies and wire harness support for medical, industrial, testing and precision equipment applications.
For products that require solder-cup or PCB termination, the termination method should be confirmed according to the selected connector series. For example, the MGG 4B metal push-pull connector supports solder-cup, PCB and other termination options depending on the product configuration.
Customers can provide their connector drawing, cable specification, wiring diagram and application requirements so that the termination method can be evaluated together with the complete connector assembly.
Solder termination, crimp termination and PCB termination are common options. For customized connector and cable assembly projects, solder termination is often selected because it provides flexible wiring and supports different cable configurations.
A solder cup is a recessed termination area on the rear of a connector contact. The stripped wire is inserted into the cup and soldered to create an electrical and mechanical connection.
No. For electrical connector contacts, the correct term is usually solder termination. Soldering uses a molten solder material to join the conductor and contact, while welding uses a different thermal or pressure-based joining process.
Yes. Solder termination can be suitable for high-density connectors when the wire size, contact spacing, soldering process and inspection method are properly controlled.
Neither method is universally better. Crimp termination is often efficient for standardized, high-volume harness production. Solder termination provides greater flexibility for customized cable assemblies, prototypes and small-batch projects.
Yes. Some push-pull connector configurations support PCB termination. The PCB footprint, mounting structure, solder joint strength and connector mating force should be evaluated before production.
Customers should provide the connector model, pin count, wiring diagram, cable length, wire gauge, signal or power requirements, shielding requirement, installation space and application environment.
Yes. QM Connectors provides connector-matching cable assemblies, wire soldering and harness support according to the selected connector, cable specification and equipment requirements.
Termination is an important part of push-pull connector design. It determines how the connector is integrated with wires, cables or circuit boards and directly affects electrical continuity, mechanical reliability and assembly efficiency.
Solder termination is especially suitable for customized connector projects because it supports flexible wiring, different pin layouts, fine wires and project-based cable assemblies. Crimp termination may be more efficient for standardized high-volume harness production, while PCB termination is suitable for compact electronic modules with fixed board layouts.
QM Connectors primarily uses solder termination and provides customized connector-matching cable assemblies for different equipment requirements. Customers can submit their connector model, wiring diagram, cable specification and application conditions to evaluate a suitable termination and cable assembly solution.
