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SuntrioStyle 3Pin Male Circular ConnectorWMM13 Plug / WM13S0301 (Blue 3Pin Male Plug)
This Suntrio-Style 3 Pin Male Circular Connector, model WMM13 Plug / WM13S03-01, is a blue 3-pin male plug specially engineered for Suntrio photovoltaic and energy storage equipment. Adopting a reliable circular locking structure, it ensures smooth plugging and stable electrical contact. Built-in waterproof sealing design effectively resists moisture and dust in outdoor environments. The housing is made of high-strength engineering plastic with UV resistance and anti-aging performance, avoiding cracking and fading under long-term outdoor exposure. Widely used for power and signal wiring of PV inverters, energy storage cabinets and distributed solar systems. Easy to install and compatible with wire harness processing, it serves as an ideal replacement option for photovoltaic and energy storage harness assemblies.
Product Specifications & Technical Parameters
| Part Number | 112000032 |
| Full Product Name | Suntrio-Style 3-Pin Male Circular Waterproof Connector, Model WMM13 Plug / WM13S03-01, Blue 3P Male Plug |
| Product Series | WM13 Field-Assembly Circular Waterproof Connector Series for PV Inverter and Energy-Storage Equipment |
| Pin Configuration | 3-pin male contact layout, supporting mixed power and signal transmission |
| Connector Gender | Male plug, cable-side field-assembly connector |
| Termination Method | Solder-wire termination. Male pin tails are designed for manual or semi-automatic soldering to stranded copper wires. No special crimp terminals or dedicated crimping tooling are required for standard assembly. |
| Contact Material & Plating | High-conductivity copper alloy substrate with gold-plated contact mating area and tin-plated solder tail. Gold plating delivers low contact resistance and excellent anti-corrosion performance for mating surface; tin-plated tail provides outstanding solderability for harness production. |
| Housing Material | High-strength flame-retardant PA66 engineering thermoplastic, UL94 V-0 compliant. UV-stabilized, anti-aging, impact-resistant and crack-resistant. Blue locking nut & cable gland, black main insulator body, widely adopted for outdoor photovoltaic and energy-storage equipment. |
| Locking Mechanism | Thread-twist coupling locking. Rotate blue knurled coupling nut to complete mating and locking. Built-in anti-mis-mating polarization keying ensures only one correct insertion angle, preventing reverse assembly and pin damage. Rear knurled cable gland provides reliable cable clamping and strain-relief to resist cable pulling, twisting and vibration stress. |
| Rated Voltage | 600V AC / DC, suitable for photovoltaic and energy-storage low-voltage power-signal loops |
| Rated Current per Pin | 15A continuous operating current for each male contact |
| Contact Resistance | ≤8 mΩ under standard ambient test conditions |
| Insulation Resistance | ≥1000 MΩ @500V DC |
| Withstand Voltage | 2200V AC for 1 minute, no breakdown, flash-over or abnormal overheating |
| Ingress Protection Rating | IP67. IP67 performance is achieved under correct assembly conditions: internal sealing O-rings properly seated, matching female receptacle fully thread-locked, and cable outer diameter falls within gland clamping range. Dust-tight and resistant to temporary water immersion. Not suitable for long-term continuous underwater submersion. |
| Operating Temperature Range | 40℃ ~ +85℃, adapts to wide temperature fluctuation of outdoor photovoltaic sites |
| Recommended Wire Gauge | AWG 20-14 stranded copper wire for solder-wire soldering |
| Applicable Cable Outer Diameter | 5.0-11.0 mm, compatible with multicore shielded or unshielded photovoltaic harness cables |
| Mechanical Mating Cycles | Minimum 500 plug-unplug cycles without obvious degradation of electrical and mechanical performance |
| Color | Blue knurled coupling nut and cable gland; black main connector housing and insulator insert |
| Assembly Type | Field-assembly cable-end male solder-wire plug. No pre-molded cable required, convenient for on-site harness cutting and processing. |
| Matching Counterpart | Corresponding WM13 series 3-pin female receptacle |
| Packaging | Anti-static bag or tray packaging for bulk orders. Anti-static packaging protects gold-plated male pins from static damage and surface contamination during storage and transportation. |
| Quality Standard | Manufactured in compliance with international industrial connection standards. Raw-material traceability available. Factory electrical, mechanical and environmental test reports, material compliance certificates can be provided upon formal customer request. |
2. Product Features and Core Advantages
This SuntrioStyle 3pin male waterproof circular connector (Model WMM13 / WM13S0301, blue 3P male plug) is specially developed for Suntrio photovoltaic inverters, energystorage cabinets and distributed solar power systems. As a fieldassembly cableside male plug, it solves typical industry painpoints including unstable contact performance under outdoor environment, insufficient cable strainrelief, complicated harness processing, poor antimisoperation capability and high overall project cost for solar OEMs and harness manufacturers.
First of all, threadtwist locking structure with IP67grade sealing ensures stable connection under harsh outdoor conditions. The WM13 series male plug adopts screwthread twistlocking design. Operators can finish secure mating simply by rotating the blue knurled coupling nut. Internal multilayer silicone sealing rings are preinstalled inside housing. Once fully locked with matching female receptacle, the mating interface achieves IP67 dustproof and waterproof performance. The rear blue knurled cablegland compresses sealing components tightly around cable outer jacket, preventing rainwater, dust and humid air from penetrating into connector interior through cable entry gap. Compared with quickpush locking connectors, threadtwist locking delivers stronger antivibration and antiloosening performance, adapting to longtime fan vibration inside inverter cabinets and outdoor wind shock.
Second,hybrid goldtin dualplated contacts balance reliable contact performance and harness manufacturability.Male pins adopt copper alloy base with gold plating on mating surface and tin plating on solder tail. Goldplated mating surface features low contact resistance, excellent oxidationresistance and saltfog resistance, avoiding contact degradation caused by humidity and atmospheric contaminants in openair PV sites. The tinplated solder tail provides excellent soldering wettability, so harness factories can form stable solder joints with ordinary soldering stations, lowering defective rate of virtualsolder and coldsolder during mass production. This dualplating design combines longterm outdoor reliability and production costeffectiveness, which is ideal for mediumandlargescale photovoltaic and energystorage projects.
Third, solderwire fieldassembly design improves harnessmaking flexibility and reduces equipment investment threshold. This WMM13 male plug uses solderwire termination instead of crimpstyle contacts. Harness workshops do not need to purchase expensive automatic crimping equipment and special crimping dies. R&D prototype verification, smallbatch trialproduction and massvolume manufacturing can all be completed by manual or semiautomatic soldering equipment. Customers can select stranded copper wires within AWG2014 range according to actual current load and internal wiringspace limitation, free from constraints of fixed crimp terminal specifications. Fieldassembly feature allows technicians to cut harness length on project site instead of ordering premolded fixedlength cables, shortening newproduct development cycle and improving construction flexibility for distributed photovoltaic projects.
Fourth, 3pin compact layout plus antimismating polarization enhances onsite construction safety. Compact 3pin arrangement integrates power and signal circuits within smallsize circular housing, saving cabinet panel layout space for inverters and energystorage devices. Builtin antimismating polarization keying on housing defines only one correct mating angle. Field installers cannot complete plugin under reversed orientation, effectively preventing pin bending, shortcircuit and equipment damage caused by human misoperation. Highgrade PA66 flameretardant housing with blueblack color scheme features outstanding impactresistance and UVagingresistance. When deployed in openair photovoltaic sites, it resists cracking, embrittlement and fading under longterm sunlight irradiation and wide temperature swing. Internal insert firmly locks three male pins, preventing contact shifting or loosening under mechanical shock and vibration.
Fifth, rigorous fullprocess quality control guarantees batchtobatch consistency.Each production batch undergoes multilevel inspection before shipment: rawmaterial incoming inspection, plating thickness sampling test, sealingcomponent dimensional verification, waterproof performance test and finishedproduct electricalperformance spotcheck. Antistatic packaging protects precision goldplated male pins from static discharge and surface contamination in logistics. Material statements and test documents can be supplied for project bidding and internal quality archive. This WM13S0301 male plug maintains interchangeable mating dimensions with Suntriocompatible WM13 series connectors on market, helping customers achieve cost optimization without sacrificing connection reliability.
3. Application Scenarios
Benefiting from 15A perpin current capacity, 3pin powersignal mixed layout, IP67 sealing and fieldassembly capability, this WMM13 / WM13S0301 blue 3pin male solderwire connector is widely applied for powersignal interconnection of photovoltaic inverters, energystorage power cabinets and outdoor solar control equipment.
3.1 Suntrio Distributed Photovoltaic Inverter Systems Used as cableside male connector for Suntrio string inverters, hybrid inverters and PV monitoring harness. Threepin design realizes mixed transmission of power supply and communication signals. IP67 sealing adapts to outdoor installation environment. Rear cablegland provides reliable strainrelief for fieldlaid photovoltaic cables.
3.2 Household & Commercial EnergyStorage Cabinets Suitable for residential energystorage systems, commercial energystorage power cabinets and hybrid energystorage inverters. Realizes external connection of power and monitoringsignal harness. Fieldassembly solderwire structure supports flexible cablelength configuration on project site. IP67 protection copes with semioutdoor cabinet deployment conditions.
3.3 Photovoltaic Monitoring & Communication Harness Applied for solar array monitoring units, PV smart combiner boxes and fieldside communication wiring. 3pin layout transmits power and sensor signals simultaneously. Multilayer sealing prevents moisture ingress into connector core under rainy and humid outdoor environments.
3.4 Outdoor Industrial SolarPowered Equipment For outdoor solar monitoring stations, solarpowered streetlight control cabinets and fielddeployed automation equipment. Working under large daynight temperature difference and raindust exposure, reliable sealing system protects internal goldplated contacts from atmospheric corrosion. Fieldassembly feature facilitates onsite maintenance and harness replacement.
3.5 Mobile Solar Emergency Power Stations Adopted on portable solar generators and mobile field energystorage devices. The connector endures frequent handling, transportation vibration and splashingwater conditions. Cablegland strainrelief avoids solderjoint damage caused by cable pulling during moving and field operation.
3.6 Photovoltaic Equipment Aging & Test Benches Widely used for inverter aging test racks and solarequipment debugging fixtures. Solderwire termination facilitates quick prototype modification and custommade testharness production. Stable electrical performance ensures repeatable test data during longtime aging operation.
4.FAQ
Q1: What IP protection rating can this WM13S0301 (WMM13) 3pin male connector achieve? A: It reaches IP67 rating under correct assembly prerequisites: builtin sealing components properly seated, matching WM13series female receptacle fully threadlocked, and cable outer diameter falls within gland clamping range. IP67 provides dusttight performance and protection against temporary water immersion. This product is NOT intended for permanent underwater submersion. If IP68 deepwater application is required, please contact our technical team for customized solution.
Q2: Are sealing accessories preinstalled inside this male plug? A: Yes, main sealing Orings are preassembled inside connector housing. No extra separatepurchasing of major sealing parts is required for standard field assembly. Please keep original sealing components intact during harness processing. Damaged sealing parts must be replaced to guarantee waterproof performance.
Q3: Is this solderwire type or crimpcontact type? Can crimp terminals be assembled? A: This is solderwiretermination male plug. Pin tails are designed for wire soldering. Standard version does not support crimp terminals. Users shall solder stranded copper wires onto pin tails by soldering iron. If crimpcontact variant is required for largescale automatic harness production, please consult our sales team for alternative model.
Q4: What wire gauge and cable outer diameter are recommended? What is perpin rated current? A: Recommended stranded copper wire gauge: AWG 2014. Applicable cable outer diameter: 5.011.0 mm. Continuous rated current for each single male pin is 15A. Do not exceed rated current in practical application to avoid abnormal heating and circuit risk.
Q5: What risks will occur if coupling nut is not fully tightened or cable gland is loosely fastened? A: Insufficient tightening of coupling nut will result in incomplete mating, loss of IP67 waterproof performance and unstable contact resistance. Loose cablegland will lose cableentry sealing and strainrelief function. Moisture and dust will invade connector interior, and cable pulling force may break solder joints. For outdoor usage, both coupling nut and rear cable gland must be fully tightened.
Q6: Does this product contain the matching WM13series 3pin female receptacle? A: This product only supplies WMM13 / WM13S0301 blue 3pin male plug. Corresponding female receptacle is sold separately. Please inform our sales if you need complete malefemale mating sets.
Q7: Can you provide customization service? A: Customization is available for largevolume orders. Supported custom items include plating thickness adjustment, special housing color, minor housing structural modification. Customized projects have MOQ requirements. Please send your detailed technical requirements to our business email for evaluation and quotation.
Q8: Can I get engineering samples for preproduction performance verification? A: Yes, test samples are available for customer performance and docking validation. Sample cost and freight shall be borne by customer. Sample leadtime depends on stock availability.
Q9: What is operating temperature range and mechanical matingcycle life? A: Standard operating temperature: 40℃ ~ +85℃. Minimum mechanical mating cycles: 500 times. For applications with extremely frequent plugunplug operations, please contact us for enhancedcontact solution.
Q10: Are rawmaterial certificates and performance test reports available? A: We can provide sampling electricalperformance test reports and rawmaterial compliance statements for project filing. Please submit your document request via our official contact channel.
5. Contact Us
If you have technical consultation, sample application, bulkorder quotation or customizedsolution demand for SuntrioStyle 3Pin Male Circular ConnectorWMM13 Plug / WM13S0301 (Blue 3P Male Plug), please feel free to get in touch with our professional sales and technicalsupport team.
Our team owns rich practical experience in industrial circular waterproof connectors, photovoltaic & energystorage interconnection components and wiring harness accessories. We are capable of providing technicalparameter confirmation, matingmodel recommendation, projectoriented customization suggestions and fullorderprogress tracking service for your specific application scenarios.
We sincerely welcome global distributors, harness manufacturers and equipment OEM / ODM manufacturers to establish longterm winwin cooperative partnerships with us.
