Contacts & Inserts
Precision Contact Solutions for Power, Signal, Data & Optical Transmission
SINOCONNECTORS provides a complete range of high-reliability contacts and inserts for circular and rectangular connectors.
From standard signal contacts to high-power, high-speed, coaxial and fiber optic solutions, our components deliver excellent electrical performance, mechanical reliability and design flexibility for the most demanding applications.
Multiple Contact Sizes
Signal to High Power 22D# through 0#& special power sizes
Power & Signal
Low-Level to High Current Signal, power &mixed-function interfaces
High-Speed / RF
Coaxial, Twinax & Quadrax RF, bus & differentialtransmission options
Fiber Optic
Single-Mode & Multimode Optical contacts &fiber jumper options
Modular Inserts
Flexible Mixed Arrangements High-density, power,coaxial & optical layouts
Multiple Terminations
Crimp, Solder & PCB Straight, right-angle,dip solder & SMD
Removable Contacts
Serviceable Contact Systems Easier wiring changes,maintenance & replacement
Custom Layouts
Application-Specific Design Contact count, size &mixed-function arrangements
Contacts Product Range
Explore signal, power, RF, high-speed, optical and application-specific contact solutions for circular, rectangular, modular, micro and special connector systems.
Standard Signal Contacts
Reliable contacts for general signal and lower-power electrical applications, with multiple contact sizes and termination options.
Pin Contacts
Precision male contact components available in crimp, solder, PCB, straight and right-angle configurations depending on connector family.
Socket Contacts
Female contact components designed for reliable repeated mating, including crimp, solder, removable and miniature socket configurations.
Power Contacts
High-current contacts for power distribution, motors, batteries, high-power equipment and mixed power-and-signal connector systems.
Coaxial Contacts
RF and controlled-impedance contact options, including 50 Ω and 75 Ω coaxial configurations for compatible connector systems.
Twinax / 1553B Contacts
Shielded dual-conductor contact systems for differential and MIL-STD-1553-type bus interconnection in compatible modular systems.
Quadrax / High-Speed Differential Contacts
Multi-conductor functional contacts for high-speed differential data transmission in selected modular connector systems.
ARINC429 / CAN Bus Contacts
Functional contact solutions for ARINC429 and ARINC825 / CAN bus signal transmission in selected modular connector systems.
Fiber Optic Contacts
Optical contact solutions for selected modular connector families, supporting single-mode and multimode fiber configurations.
Micro / Miniature Contacts
Compact contact systems for micro and miniature connectors where high contact density, reduced size and low weight are important.
Contact Accessories
Supporting components can include sealing plugs, retainers, backshells, shielding hardware, cable clamps and sealing components.
Contact Extraction & Insertion Tools
Dedicated tooling supports correct contact insertion, removal, maintenance and rewiring without damaging contacts or inserts.
Contact Size & Electrical Performance
| Contact Size |
Representative Rated Current |
Crimp Barrel I.D. |
Crimp Barrel O.D. |
Typical AWG Range |
Representative Removal Tool |
Contact Type |
|---|---|---|---|---|---|---|
| 22D# | 5 A | Ø0.85 mm | Ø1.22 mm | 22 / 24 / 26 | M81969/14-01 | Signal |
| 20# | 7.5 A | Ø1.17 mm | Ø1.78 mm | 20 / 22 / 24 | M81969/14-10 | Signal |
| 16# | 13 A | Ø1.68 mm | Ø2.62 mm | 16 / 18 / 20 | M81969/14-03 | Signal / Power |
| 12# | 23 A | Ø2.49 mm | Ø3.84 mm | 12 / 14 | M81969/14-04 | Power |
| 10# | 33 A | Ø3.40 mm | Ø4.57 mm | 10 | M81969/14-05 | Power |
| 8# | 46 A | — | — | — | Series-specific | Power |
| 4# | 80 A | — | — | — | Series-specific | High Power |
| 0# | 150 A | — | — | — | Series-specific | High Power |
Inserts & Contact Arrangements
Standard, high-density, mixed-current, coaxial and optical/electrical insert layouts are available depending on connector family and application requirements.
Standard Inserts
General-purpose insert layouts for signal and standard electrical interconnection.
High-Density Inserts
Higher contact-count layouts designed for space-constrained equipment and compact systems.
Mixed Power + Signal Inserts
Combines multiple contact sizes so power and signal functions can share one connector interface.
Coaxial Mixed Inserts
Combines conventional electrical contacts with coaxial contacts in compatible connector systems.
Hybrid Optical / Electrical Inserts
Combines electrical contacts and optical contacts in a shared connector housing or modular system.
Modular Rectangular Inserts
Replaceable or configurable insert modules for frame-panel and modular rectangular connector systems.
Termination Options
Crimp Termination
Repeatable conductor termination using specified crimp tools and positioners.
Solder Termination
Solder contact options for cable and wire termination.
Dip Solder
Through-hole PCB contact styles for selected rectangular and modular connectors.
Straight PCB
Vertical PCB contacts for direct connector-to-board mounting.
Right-Angle PCB
90° PCB contacts for low-profile and edge-of-board layouts.
Surface Mount
SMD contact structures for selected rectangular connector families.
Cable Assembly
Completed cable assemblies with shielding, strain relief and rear accessories.
Crimping, Insertion & Removal
Crimping Tools
Dedicated crimp tools support repeatable conductor termination for compatible removable contact systems.
Positioners
Dedicated positioners locate the contact correctly inside the crimp tool for controlled crimping.
Insertion Tools
Insertion tools guide terminated contacts into the correct cavity without damaging the contact or insert.
Removal Tools
Removal tools release the contact retention mechanism for maintenance, replacement or rewiring.
Installation Process
Correct tooling and contact installation help support repeatable assembly, maintenance and reliable connection.
Crimping, Insertion & Removal
High-Conductivity Copper Alloy
Copper-alloy contact bodies provide electrical conductivity together with the mechanical strength required for reliable connector contact systems.
Gold-Plated Contact Surface
Gold-plated mating surfaces are used in many high-reliability contact systems to support low contact resistance and corrosion resistance.
Twisted-Wire Elastic Contacts
Selected micro rectangular connector families use gold-plated twisted-wire elastic contact technology for high-density reliable interconnection.
Removable Contact Design
Removable contacts simplify connector assembly, rewiring, rework, replacement and maintenance in many circular and modular systems.
Contact / Insert Combination
Compatible connector systems can combine different contact types, sizes and functions within one insert or modular frame.
FAQ
Find answers to common questions about circular connectors,
01 What are connector contacts and inserts?
Contacts are the conductive or optical elements that carry power, signals, data or light through a connector. Inserts are the insulating structures or modules that hold contacts in the correct position, spacing and arrangement.
02 What contact types does SINOCONNECTORS provide?
The portfolio includes signal contacts, pin contacts, socket contacts, power contacts, coaxial contacts, twinax / bus contacts, high-speed differential contacts, fiber-optic contacts, micro contacts and application-specific functional contacts.
03 What contact sizes are available?
Available sizes depend on connector family. Common sizes include 22D#, 20#, 16#, 12#, 10#, 8#, 4# and 0#, while special high-power connector families may use larger sizes.
04 What is the difference between pin and socket contacts?
A pin contact is the male mating element, while a socket contact is the female mating element. Which one is installed in the plug or receptacle depends on the connector family and configuration.
05 What current can a connector contact carry?
Current depends on contact size, material, connector design, wire size and environment. Representative values range from a few amps for small signal contacts to 150 A or more for large power contacts, with special high-power families supporting even higher current.
06 What wire sizes can be used with 22D#, 20#, 16#, 12# and 10# crimp contacts?
Representative circular-contact data includes AWG 22/24/26 for 22D#, AWG 20/22/24 for 20#, AWG 16/18/20 for 16#, AWG 12/14 for 12# and AWG 10 for 10#.
Exact compatibility must be confirmed by contact part number.
07 Do you provide crimp contacts?
Yes. Many circular and modular connector families use removable crimp contacts with specified crimp tools, positioners and insertion/removal tools.
08 Do you provide solder and PCB contacts?
Yes. Depending on product family, contact termination can include solder, dip solder, straight PCB, right-angle PCB and surface-mount configurations.
09 Do you provide coaxial contacts?
Yes. Selected connector families support coaxial contacts, including 50 Ω and 75 Ω options in applicable products.
10 Do you provide MIL-STD-1553-type contacts?
Yes. Selected modular connector systems support twinax / dual shielded contact technologies for MIL-STD-1553-type bus interconnection.
11 Do you provide high-speed differential contacts?
Yes. Selected modular products can accept high-speed differential / quadrax-type contacts. Representative source data includes 1.65 Gbps and 100 Ω characteristic impedance for one modular configuration.
12 Can you support ARINC429 and CAN bus contacts?
Selected modular connector products support functional contact solutions for ARINC429 and ARINC825 / CAN signal transmission.
13 Do you provide fiber-optic contacts?
Yes. Selected modular connector families support optical contacts for G652 single-mode, 62.5/125 multimode and 50/125 multimode fiber, depending on the contact system.
14 Can electrical and optical contacts be mixed in one connector?
Yes, where the connector family and insert arrangement support hybrid configurations. Mixed electrical, coaxial and optical inserts are available in selected modular systems.
15 Can power and signal contacts be mixed in one insert?
Yes. Mixed-current inserts can combine different contact sizes and functions so power and signal can share one connector interface.
16 Are contacts removable?
Many high-reliability connector families use removable contacts. Some glass-sealed or special fixed-contact products are exceptions.
17 Do you provide insertion and removal tools?
Yes. Tooling varies by contact size and series. Representative M81969-series removal tool references are included in the source product documentation.
18 Can you customize an insert layout?
Yes. Contact count, contact size, functional-contact mix and insert arrangement can be evaluated based on the selected connector architecture and application requirements.
19 What information do you need to select the correct contact?
Please provide connector series, contact size if known, wire gauge, current, voltage, signal type, frequency or data rate, termination method, pin/socket requirement, environment and expected mating cycles.
20 How do I confirm the correct contact or tool part number?
Provide the complete connector model, cavity size, contact type and termination requirement.
Final contact and tool selection should be confirmed against the approved connector specification and contact table.
Who We Are
Your Partner for Industrial Connection Solutions
We specialize in industrial electrical connectors and related components, providing reliable connection solutions for demanding applications. Our products cover circular connectors, rectangular connectors, contacts, accessories, cable assemblies and customized solutions.
Engineering Excellence
Experienced engineers dedicated to solving complex connection challenges.
Customer Partnership
We listen, collaborate, and align our solutions with your goals and timelines.
Quality Commitment
Robust quality systems ensure reliability, traceability, and continual improvement.
Global & Responsive
Serving customers worldwide with agile support and reliable delivery.
Let's Build a Better Connection—Together.
Tell us about your application and our team will provide the right solution.