{"product_id":"new-1pc-tianshui-213-contactor-gsc1-1201-gsc1cjx4-d-1201-110v","title":"Tianshui 213 GSC1-1201 3-Pole Contactor with 110V AC Coil","description":"\u003cstyle\u003e\n  \/* Base Container \u0026 Scope Isolation *\/\n  .koeed-wrapper {\n    width: 100%;\n    box-sizing: border-box;\n    color: #333333;\n    line-height: 1.6;\n  }\n  .koeed-wrapper *, .koeed-wrapper *::before, .koeed-wrapper *::after {\n    box-sizing: border-box;\n  }\n\n  \/* Headings \u0026 Typography *\/\n  .koeed-wrapper h2 {\n    color: #16c8c8;\n    border-left: 4px solid #16c8c8;\n    padding-left: 12px;\n    margin-top: 30px;\n    margin-bottom: 15px;\n    font-weight: 700;\n  }\n  .koeed-wrapper h3 {\n    color: #0056b3;\n    margin-top: 20px;\n    margin-bottom: 10px;\n    font-weight: 600;\n  }\n\n  \/* Callout Blockquote *\/\n  .koeed-quote {\n    background-color: #f4fcfc;\n    border-left: 4px solid #16c8c8;\n    padding: 15px;\n    margin: 20px 0;\n  }\n\n  \/* Responsive Tables *\/\n  .koeed-table-responsive {\n    width: 100%;\n    overflow-x: auto;\n    margin-bottom: 25px;\n    border: 1px solid #eeeeee;\n  }\n  .koeed-table {\n    width: 100%;\n    border-collapse: collapse;\n    text-align: left;\n  }\n  .koeed-table th {\n    background-color: #f4fcfc;\n    color: #0056b3;\n    font-weight: 600;\n    padding: 12px;\n    border-bottom: 2px solid #eeeeee;\n  }\n  .koeed-table td {\n    padding: 12px;\n    border-bottom: 1px solid #eeeeee;\n  }\n  .koeed-table tr:nth-child(even) {\n    background-color: #fafafa;\n  }\n  .koeed-table tr:nth-child(odd) {\n    background-color: #ffffff;\n  }\n\n  \/* Bullet Points \u0026 Lists *\/\n  .koeed-list {\n    padding-left: 20px;\n    margin-bottom: 20px;\n  }\n  .koeed-list li {\n    margin-bottom: 8px;\n  }\n\n  \/* Interactive Tool Styles *\/\n  .koeed-tool-container {\n    background-color: #ffffff;\n    border: 2px solid #16c8c8;\n    border-radius: 6px;\n    padding: 25px;\n    margin: 30px 0;\n  }\n  .koeed-tool-grid {\n    display: grid;\n    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));\n    gap: 20px;\n    margin-bottom: 20px;\n  }\n  .koeed-input-group {\n    display: flex;\n    flex-direction: column;\n  }\n  .koeed-input-group label {\n    font-weight: 600;\n    margin-bottom: 6px;\n    color: #333333;\n  }\n  .koeed-input-group input, .koeed-input-group select {\n    padding: 10px;\n    border: 1px solid #eeeeee;\n    border-radius: 4px;\n    background-color: #fafafa;\n  }\n  .koeed-input-group input:focus, .koeed-input-group select:focus {\n    outline: none;\n    border-color: #16c8c8;\n    background-color: #ffffff;\n  }\n  .koeed-btn {\n    background-color: #16c8c8;\n    color: #ffffff;\n    border: none;\n    padding: 12px 20px;\n    border-radius: 4px;\n    cursor: pointer;\n    font-weight: 600;\n    transition: background-color 0.2s ease;\n  }\n  .koeed-btn:hover {\n    background-color: #0056b3;\n  }\n  .koeed-result-panel {\n    background-color: #f4fcfc;\n    border: 1px dashed #16c8c8;\n    padding: 15px;\n    margin-top: 20px;\n    border-radius: 4px;\n  }\n  .koeed-result-value {\n    font-size: 1.5em;\n    font-weight: 700;\n    color: #0056b3;\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"koeed-wrapper\"\u003e\n\n  \u003c!-- SECTION 1: Engineer's Quick Brief --\u003e\n  \u003ch2\u003eEngineer's Quick Brief\u003c\/h2\u003e\n  \u003cdiv class=\"koeed-quote\"\u003e\n    \u003cul class=\"koeed-list\" style=\"margin-bottom: 0;\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Power Commutation:\u003c\/strong\u003e Engineered for robust switching performance, supporting continuous thermal operational currents up to \u003cstrong\u003e120A (AC-3)\u003c\/strong\u003e for reliable industrial load handling.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eStandardized 110V AC Control:\u003c\/strong\u003e Equipped with a precision-wound \u003cstrong\u003e110V AC coil\u003c\/strong\u003e operating loop, perfectly matching mainstream control transformer outputs and machinery interlock systems.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMulti-Pole Grid Isolation:\u003c\/strong\u003e Features a robust \u003cstrong\u003e3-pole\u003c\/strong\u003e main contact structure alongside integrated auxiliary interlocks to manage heavy three-phase industrial motor starters securely.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 2: SEO Introduction --\u003e\n  \u003cp\u003eThe \u003cstrong\u003eTianshui 213 GSC1-1201\u003c\/strong\u003e is a highly durable, industrial-grade \u003cstrong\u003e3-pole AC contactor\u003c\/strong\u003e designed to execute frequent remote closing and circuit interruption across high-power networks. Operating via a standard \u003cstrong\u003e110V AC coil\u003c\/strong\u003e control loop, this robust \u003cstrong\u003emagnetic contactor\u003c\/strong\u003e delivers a nominal rating of \u003cstrong\u003e120A\u003c\/strong\u003e under demanding AC-3 utilization categories, making it an excellent fit for directly initiating three-phase induction motors, heavy ventilation blowers, and resistance heating arrays. Engineered by Tianshui 213, a leading authority in low-voltage electrical apparatus, the GSC1-1201 contactor integrates arc-chute matrices and premium silver-alloy terminal faces to minimize contact resistance and withstand aggressive inductive switching cycles.\u003c\/p\u003e\n\n  \u003c!-- SECTION 3: Technical Specifications --\u003e\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdiv class=\"koeed-table-responsive\"\u003e\n    \u003ctable class=\"koeed-table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eEngineering Parameter\u003c\/th\u003e\n          \u003cth\u003eTechnical Classification\u003c\/th\u003e\n          \u003cth\u003eOperational Value\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eBrand Manufacturer\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eOEM Factory Lineage\u003c\/td\u003e\n          \u003ctd\u003eTianshui 213 (Tianshui 213 Electrical Apparatus Co., Ltd.)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eModel Identifier\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003ePart Number Code\u003c\/td\u003e\n          \u003ctd\u003eGSC1-1201 Variant Series\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003ePole Configuration\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eMain Power Paths Count\u003c\/td\u003e\n          \u003ctd\u003e3-Pole (3NO Main Contacts)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eControl Winding Potential\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eCoil Voltage Source Limits\u003c\/td\u003e\n          \u003ctd\u003e110V AC (50\/60 Hz Variable Rail)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eRated Operational Current ($I_e$)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eAC-3 Inductive Thermal Cap\u003c\/td\u003e\n          \u003ctd\u003e120A\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eConventional Thermal Current ($I_{th}$)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eAC-1 Non-Inductive Rating\u003c\/td\u003e\n          \u003ctd\u003e200A Maximum Line Load\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eControlled Power Limit (380V\/400V)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eStandard Motor kW Rating\u003c\/td\u003e\n          \u003ctd\u003e55 kW (AC-3 Loading Profile)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eControlled Power Limit (660V\/690V)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eElevated Grid kW Rating\u003c\/td\u003e\n          \u003ctd\u003e80 kW\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eAuxiliary Contact Block\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eIntegrated Interlock Array\u003c\/td\u003e\n          \u003ctd\u003eStandard Auxiliary Matrix Configuration\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eStandards Conformance\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eRegulatory Compliance Tracking\u003c\/td\u003e\n          \u003ctd\u003eIEC 60947-4-1, GB\/T 14048.4, CE Certified\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 4: Application Matrix --\u003e\n  \u003ch2\u003eApplication Matrix\u003c\/h2\u003e\n  \u003cdiv class=\"koeed-table-responsive\"\u003e\n    \u003ctable class=\"koeed-table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eTarget Industrial System\u003c\/th\u003e\n          \u003cth\u003eDeployment Purpose\u003c\/th\u003e\n          \u003cth\u003eEngineering Value Delivered\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eThree-Phase Motor Starters\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eDirect-On-Line (DOL) configuration\u003c\/td\u003e\n          \u003ctd\u003eSafely interrupts up to 8x rated full-load motor inrush currents during initialization loops without contact welding.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eAutomatic Transfer Switches (ATS)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eMain grid line commutation\u003c\/td\u003e\n          \u003ctd\u003eProvides reliable, low-impedance path swapping for critical backup generator interfaces utilizing a clear 110V auxiliary line.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eHeavy HVAC Control Cabinets\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eCompressor matrix control\u003c\/td\u003e\n          \u003ctd\u003eWithstands repetitive electrical operations, reducing field degradation from standard inductive switching stresses.\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- SECTION 5: Koeed B2B Interactive Tool --\u003e\n  \u003ch2\u003eKoeed B2B Tool: Motor Starter Coordination \u0026amp; Thermal Sizing Calibrator\u003c\/h2\u003e\n  \u003cp\u003eIndustrial installations require matching the contactor with appropriate motor sizes and upstream branch protection. Input your direct 3-phase motor running metrics to verify GSC1-1201 circuit utilization profiles.\u003c\/p\u003e\n  \n  \u003cdiv class=\"koeed-tool-container\"\u003e\n    \u003cdiv class=\"koeed-tool-grid\"\u003e\n      \u003cdiv class=\"koeed-input-group\"\u003e\n        \u003clabel for=\"koeed-motor-kw\"\u003eMotor Rated Power (kW at 380V):\u003c\/label\u003e\n        \u003cinput type=\"number\" id=\"koeed-motor-kw\" min=\"1\" max=\"90\" value=\"45\"\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"koeed-input-group\"\u003e\n        \u003clabel for=\"koeed-ambient-factor\"\u003eEnclosure Ambient Temp (°C):\u003c\/label\u003e\n        \u003cselect id=\"koeed-ambient-factor\"\u003e\n          \u003coption value=\"1.0\" selected\u003eStandard Industrial (≤ 40°C)\u003c\/option\u003e\n          \u003coption value=\"0.88\"\u003eElevated Thermal Env (41°C - 50°C)\u003c\/option\u003e\n          \u003coption value=\"0.75\"\u003eSevere Hot Bay (\u0026gt; 50°C Zone)\u003c\/option\u003e\n        \u003c\/select\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"koeed-input-group\"\u003e\n        \u003clabel for=\"koeed-contactor-max\"\u003eContactor AC-3 Baseline Rating:\u003c\/label\u003e\n        \u003cinput type=\"number\" id=\"koeed-contactor-max\" value=\"120\" readonly\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cbutton class=\"koeed-btn\" onclick=\"koeedEvaluateContactorSizing()\"\u003eVerify Loop Integration\u003c\/button\u003e\n    \n    \u003cdiv class=\"koeed-result-panel\"\u003e\n      \u003cdiv\u003eEstimated Full Load Amperage (FLA) \u0026amp; Margin Status:\u003c\/div\u003e\n      \u003cdiv class=\"koeed-result-value\" id=\"koeed-sizing-output\"\u003e90.0 A (Safe Margin Managed)\u003c\/div\u003e\n      \u003cdiv style=\"margin-top: 8px; font-size: 0.85em; color: #666666;\" id=\"koeed-sizing-note\"\u003eRecommended Type 2 Short-Circuit Backup Fuse Rating: 160A slow blow or equivalent breaker curve profile.\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cnoscript\u003e\n    \u003cdiv class=\"koeed-quote\"\u003e\n      \u003cstrong\u003eEngineering Field Calculation Note:\u003c\/strong\u003e The standard continuous handling margin for the Tianshui 213 GSC1-1201 under AC-3 configurations is 120A. When ambient control box thresholds exceed 40°C, a linear thermal safety derating factor should be applied to prevent contact fatigue.\n    \u003c\/div\u003e\n  \u003c\/noscript\u003e\n\n  \u003cscript\u003e\n    function koeedEvaluateContactorSizing() {\n      var motorKw = parseFloat(document.getElementById('koeed-motor-kw').value);\n      var derating = parseFloat(document.getElementById('koeed-ambient-factor').value);\n      var maxAllowed = 120 * derating;\n      \n      if (isNaN(motorKw) || motorKw \u003c= 0) {\n        alert(\"Please provide a valid, positive mechanical power metric in kilowatts.\");\n        return;\n      }\n      \n      var estimatedFla = motorKw * 2.0; \/\/ Standard empirical rule for 380V 3-phase induction motors\n      var allocationPct = (estimatedFla \/ maxAllowed) * 100;\n      \n      var statusString = \"\";\n      if (estimatedFla \u003e maxAllowed) {\n        statusString = \" A (OVERLOAD RISK FOR FRAME)\";\n      } else if (allocationPct \u003e 85) {\n        statusString = \" A (High Operational Loading)\";\n      } else {\n        statusString = \" A (Optimized Safe Margin)\";\n      }\n      \n      var fuseRecommendation = Math.ceil((estimatedFla * 1.6) \/ 10) * 10;\n      if (fuseRecommendation \u003c 20) fuseRecommendation = 20;\n      \n      document.getElementById('koeed-sizing-output').innerText = estimatedFla.toFixed(1) + statusString;\n      document.getElementById('koeed-sizing-note').innerText = \"Framework operating envelope calculation utilizes \" + allocationPct.toFixed(1) + \"% of derated contactor capacity. Target short-circuit protection fuse recommendation: \" + fuseRecommendation + \"A class aM\/gG standard configuration.\";\n    }\n  \u003c\/script\u003e\n\n  \u003c!-- SECTION 6: Troubleshooting \u0026 FAQ --\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \n  \u003ch3\u003eQ1: Why does the contactor emit a loud buzzing or chattering sound when the 110V AC control line is active?\u003c\/h3\u003e\n  \u003cp\u003eLoud buzzing or chattering in an AC contactor frame typically stems from two root causes: a significant drop in control voltage or foreign particles along the core pole faces. Verify with a digital multimeter that terminal nodes A1 and A2 are receiving at least 85% of the nominal 110V specification during inrush drawing phases. If the voltage tests fine, isolate the unit, check the internal iron core structure, and clean away any layout dust, rust, or storage grease layer from the laminated core faces.\u003c\/p\u003e\n\n  \u003ch3\u003eQ2: What visual indicators confirm that the internal main power contacts require replacement?\u003c\/h3\u003e\n  \u003cp\u003eInspect the main pole assemblies inside the arc chute framework during routine plant power downs. Signs of advanced electrical erosion include severe pitting across the silver alloy, visible copper exposure beneath the contact tip cladding layer, or deep deformation from repetitive arc tracking. If contact thickness drops below half of its factory outline specification, replace the contact arrays immediately to prevent terminal phase-to-phase welding faults.\u003c\/p\u003e\n\n  \u003ch3\u003eQ3: Can the 110V AC control configuration be safely driven by a 120V AC source grid?\u003c\/h3\u003e\n  \u003cp\u003eYes. Standard industrial contactor coils are engineered to accommodate variance limits defined by IEC standards, typically spanning 85% to 110% of nominal excitation ratings. A 120V AC control signal falls within the safe operating envelope for a 110V system. However, ensure continuous operation does not sustain a voltage profile above 121V AC, as excess control potential can overheat the internal wire spool and break down insulation layers prematurely.\u003c\/p\u003e\n\n  \u003c!-- SECTION 7: Cross-Reference \u0026 Selection Guide --\u003e\n  \u003ch3\u003eCross-Reference Guide\u003c\/h3\u003e\n  \u003cp\u003eWhen engineering field modernizations or setting up backup stock infrastructure, the following functional physical parameters align with standard global cross-referencing registries:\u003c\/p\u003e\n  \u003cul class=\"koeed-list\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect Equivalent Series Matching:\u003c\/strong\u003e Serves as a reliable drop-in alternative for standard GSC1 series frame modules and matches the installation dimensions of classic LC1-D115 \/ LC1-D120 style control products.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSystem Platform Interoperability:\u003c\/strong\u003e Integrates smoothly into standardized starter control assemblies alongside thermal overload relay modules from global low-voltage apparatus brands, provided nominal mounting footprints and interlock configurations match the enclosure plan.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e\n\n\u003c!-- Structured JSON-LD Data for AI Scraping Engines --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"FAQPage\",\n      \"mainEntity\": [\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Why does the contactor emit a loud buzzing or chattering sound when the 110V AC control line is active?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Loud buzzing typically stems from a drop in control voltage or foreign particles on the core pole faces. Verify terminal nodes A1 and A2 receive at least 85% of nominal 110V during inrush phases, and ensure the laminated core faces are clear of debris.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What visual indicators confirm that the internal main power contacts require replacement?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Advanced pitting across the silver alloy, visible copper exposure beneath the contact tip cladding, or deep deformation from arc tracking indicate contact degradation. Replace the arrays if thickness drops below half of factory specifications.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can the 110V AC control configuration be safely driven by a 120V AC source grid?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes, standard coils accommodate variance limits spanning 85% to 110% of nominal ratings. A 120V AC source falls within safe thresholds, but ensure the line does not sustain voltage profiles above 121V AC to prevent thermal coil fatigue.\"\n          }\n        }\n      ]\n    },\n    {\n      \"@type\": \"WebApplication\",\n      \"name\": \"Motor Starter Coordination \u0026 Thermal Sizing Calibrator\",\n      \"applicationCategory\": \"BusinessApplication\",\n      \"operatingSystem\": \"All\",\n      \"browserRequirements\": \"Requires JavaScript. Requires HTML5.\",\n      \"description\": \"An interactive utility designed for industrial automation engineers to verify continuous full load amperage tracking, adjust safety derating factors, and determine short-circuit fuse coordination protection profiles.\"\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"KOEED","offers":[{"title":"Default Title","offer_id":44483696951481,"sku":"404556487792","price":53.27,"currency_code":"USD","in_stock":true}],"url":"https:\/\/koeed.com\/ko\/products\/new-1pc-tianshui-213-contactor-gsc1-1201-gsc1cjx4-d-1201-110v","provider":"KOEED","version":"1.0","type":"link"}