M8 Series Wire Soldering Connector | Plastic & Metal Housing Optional

The M8 wire soldering connector series adopts standard M8 threaded locking structure with unified industrial specifications and high market compatibility. The product supports multiple pin core configurations including 2-core, 3-core, 4-core, 5-core and 6-core, fully covering mainstream low-power signal transmission and micro power supply connection requirements. Plastic housing and metal housing versions share the same electrical parameters, while they differ greatly in mechanical strength, protection grade and anti-interference performance. All parameters comply with RoHS international standards to ensure stable quality for global sales and industrial matching.

1.1 Structural Parameters

This series is pure wire soldering type without PCB board mounting structure, adopting extended tin-soldering terminal design to facilitate manual wire welding and fixing. The standard M8 thread ensures precise locking and stable docking, effectively preventing loosening and poor contact caused by equipment vibration and mechanical movement. The product is compatible with 20AWG to 28AWG stranded copper wires, which covers most miniature signal wires and low-power power wires used in industrial intelligent equipment. The recommended wire stripping length is 3mm to 5mm to ensure sufficient welding area and firm wiring effect.

The plastic housing is integrally injection molded with high-performance PA66 flame-retardant material, featuring seamless structure, good toughness, anti-aging performance and excellent insulation. The metal housing is processed by precision CNC machining and surface anti-rust treatment, with high hardness, compression resistance and torsion resistance. The overall structure is compact and miniaturized, which will not occupy excessive installation space, perfectly adapting to the miniaturization development trend of modern industrial electronic equipment.

1.2 Electrical Performance Parameters

Rated current: 4A for 2/3/4-core models, 2.5A for 5/6-core models; Rated voltage: 60V AC/DC for low-core versions and 30V AC/DC for high-core versions. Withstand voltage reaches 1500V AC (50Hz, 1 minute), with no breakdown or flashover, providing strong insulation protection against instantaneous voltage surge and circuit impact. The insulation resistance is ≥1000MΩ under normal temperature and humidity, effectively avoiding current leakage, short circuit and insulation aging failure.

The contact resistance is controlled below 5mΩ, realizing ultra-low-loss signal and power transmission without signal attenuation, delay or distortion. The conductive pins are made of high-purity oxygen-free copper alloy with gold-plated surface treatment, which greatly improves conductivity, oxidation resistance and corrosion resistance. The electrical plugging service life exceeds 1000 cycles, maintaining stable electrical performance after long-term repeated plugging and continuous power-on operation.

1.3 Mechanical Performance

The M8 wire soldering connector adopts reinforced thread locking design with locking torque of 0.4N·m to 0.8N·m, ensuring firm locking and anti-loosening effect during long-term equipment operation. The plugging force is uniform and moderate, convenient for manual assembly, on-site wiring and daily maintenance without damaging pins and insulating components. The product can withstand continuous vibration of 10Hz to 2000Hz and instantaneous mechanical impact, adapting to vibrating working environments of automated machinery and mobile industrial equipment.

1.4 Environmental Performance Parameters

Working temperature range: -40℃ to +85℃; storage temperature range: -50℃ to +90℃. The product can work stably in extreme low temperature, high temperature and alternating cold and hot environments without material aging and performance degradation. It can resist long-term high humidity environment of 95%RH non-condensing, with excellent moisture-proof, mildew-proof and anti-corrosion ability.

The plastic housing version reaches IP44 dustproof and splash-proof grade, suitable for indoor static and protected environments. The metal housing version reaches IP67 high-level dustproof and waterproof performance, which can completely isolate dust and resist short-term water immersion, fully adapting to industrial workshops, outdoor equipment and humid and dusty harsh scenarios.

1.5 Soldering Process Parameters

The recommended soldering temperature is 240℃ to 250℃, and the single-point soldering time is controlled within 2 to 3 seconds to avoid high-temperature deformation and damage to the insulating shell. The product supports lead-free environmental protection solder, meeting EU RoHS environmental protection standards. The optimized terminal structure effectively prevents virtual soldering, missing soldering and wire falling off, ensuring high yield and stable wiring quality during manual assembly.

Our M8 wire soldering industrial connector with plastic and metal dual housing options provides flexible, low-cost and high-stability field wiring solutions for miniature industrial equipment. Compared with traditional crimping connectors and board-mounted connectors, this wire soldering type has obvious advantages of low assembly threshold, strong flexibility and wide adaptability, and can perfectly meet the installation and maintenance needs of engineering wiring and non-standard equipment.

2.1 Pure Wire Soldering Design, Flexible & Convenient Assembly

Different from crimping connectors that require professional tools and board-mounted connectors that require fixed welding positions, the M8 wire soldering connector supports free on-site wiring. Customers only need a conventional electric soldering iron to complete wire assembly without purchasing expensive tooling and molds. The operation process is simple and efficient, greatly reducing equipment installation cost and technical threshold, and is very suitable for on-site construction, equipment debugging, after-sales maintenance and small-batch customized production.

2.2 Plastic & Metal Dual Housing Optional

We provide two housing solutions to balance customer cost and performance requirements. The plastic housing version is lightweight, low-cost, highly insulated and interference-free, which can effectively reduce the overall production cost of terminal equipment. It is the best choice for indoor smart home equipment, commercial electronic products and indoor sensing devices. The metal housing version has high structural strength, IP67 waterproof and dustproof performance and 360° electromagnetic shielding function, which can effectively isolate external electromagnetic signal interference, prevent signal clutter and data distortion, and ensure ultra-stable signal transmission in complex industrial electromagnetic environments.

2.3 Miniaturized Structure & High Transmission Stability

Adopting ultra-compact M8 thread structure, the product occupies extremely small installation space and conforms to the miniaturization and integration design trend of modern industrial equipment. The gold-plated high-precision pins ensure ultra-low contact resistance and long-term oxidation resistance, avoiding poor contact and signal interruption caused by long-term use and harsh environmental erosion. The threaded self-locking structure ensures tight docking of plug and socket, no loose connection during equipment vibration and movement, realizing long-term stable operation of the circuit system.

2.4 High Safety & Environmental Protection Performance

All materials are flame-retardant, non-toxic and environmentally friendly, fully complying with CE and RoHS international certification standards. The product has wide temperature resistance, waterproof, dustproof, anti-vibration and anti-aging capabilities, and can adapt to various complex working environments. The plastic shell has excellent insulation and flame-retardant performance to prevent circuit safety hazards; the metal shell has good grounding and static conduction performance to protect precision electronic components from static damage.

With flexible wire soldering assembly, dual material options, high stability and strong environmental adaptability, M8 wire soldering connectors are widely used in industrial automation, intelligent IoT sensing, precision instruments, smart home systems, security monitoring and automotive electronic auxiliary equipment.

3.1 Industrial Automation Field

It is widely used for signal connection of industrial miniature sensors, micro solenoid valves, small actuators and automation auxiliary modules. The flexible wiring feature is very suitable for on-site renovation, equipment debugging and production line maintenance of automated workshops.

3.2 Intelligent IoT Sensing System

Suitable for temperature, humidity, pressure, photoelectric and proximity sensors used in environmental monitoring, smart agriculture, urban IoT and building intelligent systems. The compact structure and stable signal performance ensure real-time and accurate data collection of sensing terminals.

3.3 Precision Instrumentation & Testing Equipment

Applied to portable testing instruments, optical detection equipment and experimental electronic modules. The metal shielding version can effectively resist external electromagnetic interference and ensure detection accuracy and experimental stability.

3.4 Smart Home & Commercial Electronics

The cost-effective plastic version is widely used in smart lighting, intelligent access control, security monitoring and household intelligent control modules, providing stable and low-cost connection solutions for civilian intelligent equipment.

3.5 Outdoor & Automotive Electronic Equipment

The IP67 waterproof metal version is suitable for outdoor monitoring equipment, landscape lighting and vehicle-mounted miniature electronic modules, adapting to outdoor wind, rain, dust and vibration environments.

Q1: What are the advantages of M8 wire soldering connectors compared with crimping connectors?

Wire soldering type does not need special crimping tools, with low assembly cost and flexible on-site wiring. It is more suitable for engineering installation, equipment maintenance and non-standard projects, while crimping type is more suitable for fixed mass production.

Q2: How to choose plastic housing and metal housing?

Plastic housing is low-cost, lightweight and insulated for indoor and static commercial scenarios. Metal housing has IP67 waterproof, dustproof and electromagnetic shielding functions, suitable for industrial sites, outdoor environments and high-precision anti-interference equipment.

Q3: What wire gauge does the M8 wire soldering connector support?

It supports 20AWG to 28AWG standard stranded copper wires, covering most miniature signal and power wires for industrial intelligent equipment.

Q4: Is the soldering process difficult?

The welding operation is simple and does not require professional skills. Ordinary electric soldering iron can complete assembly, with high efficiency and low defective rate.

Q5: Do you support customized specifications?

Yes, we support customized pin count, special length, surface treatment and special environmental resistance parameters to meet personalized project needs.

Q6: What certifications do your products have?

All products have passed CE and RoHS certifications, fully meeting global export environmental protection and safety standards.

Q7: What is your after-sales service policy?

We provide 12-month quality warranty and 24-hour online technical support. Standard products are in stock with fast delivery, and customized orders are completed within 7–15 working days.

We are a professional manufacturer specializing in the R&D, production and sales of M5, M8, M10, M12 series industrial aviation connectors. With mature production technology, strict quality control system and rich customization experience, we are committed to providing global customers with high-precision, high-stability and cost-effective industrial connection solutions.

Our M8 wire soldering connector series with plastic and metal dual housing options can fully meet the diversified application needs of industrial automation, intelligent IoT, precision instruments, smart home and new energy industries. We support free sample testing, batch procurement and personalized customized services.

Welcome global customers to consult product parameters, obtain official datasheets, inquire about quotations and put forward customized demands. We adhere to customer-oriented service philosophy and provide one-stop professional technical support and after-sales service to create long-term stable win-win cooperation.