{"product_id":"dc-solar-mccb-circuit-breaker-1p-2p-4p-dc500v-1000v-125a-250a","title":"DC Solar MCCB Molded Case Circuit Breaker 1P\/2P\/4P DC500V\/1000V 125A\/250A Overload Protection for Solar PV Systems","description":"\u003ch2\u003eDC Solar Molded Case Circuit Breaker (MCCB) — 1P\/2P\/4P DC500V\/1000V 125A\/250A\u003c\/h2\u003e\n\n\u003cp\u003eProtect your solar PV investment with a purpose-built \u003cstrong\u003eDC molded case circuit breaker (MCCB)\u003c\/strong\u003e rated for the high-voltage DC environments of photovoltaic systems. Unlike standard AC circuit breakers, these DC-rated MCCBs are engineered to interrupt DC arc faults — the most dangerous and difficult-to-extinguish fault type in solar installations. Available in 1P, 2P, and 4P configurations for DC 500V and DC 1000V systems, with 125A and 250A current ratings to match your system capacity.\u003c\/p\u003e\n\n\u003ch3\u003eModel Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003ePoles\u003c\/th\u003e\n\u003cth\u003eRated Voltage\u003c\/th\u003e\n\u003cth\u003eRated Current\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDG1-125\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1P \/ 2P \/ 4P\u003c\/td\u003e\n\u003ctd\u003eDC 500V\u003c\/td\u003e\n\u003ctd\u003e125A\u003c\/td\u003e\n\u003ctd\u003eSmall to medium solar PV arrays\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDG1-250\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1P \/ 2P \/ 4P\u003c\/td\u003e\n\u003ctd\u003eDC 1000V\u003c\/td\u003e\n\u003ctd\u003e250A\u003c\/td\u003e\n\u003ctd\u003eLarge-scale solar PV systems\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eGeneral Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMolded Case Circuit Breaker (MCCB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSolar PV DC systems\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 500V \/ DC 1000V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125A \/ 250A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePole Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1P \/ 2P \/ 4P\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOverload + Short-circuit protection\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSmart Device\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo (manual operation)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhy DC-Rated MCCBs Are Essential for Solar PV\u003c\/h3\u003e\n\u003cp\u003eStandard AC circuit breakers \u003cstrong\u003ecannot safely interrupt DC faults\u003c\/strong\u003e. DC current does not have the natural zero-crossing that AC current does, making DC arcs self-sustaining and extremely dangerous. DC-rated MCCBs use specialized arc-quenching chambers designed specifically for DC interruption, ensuring safe and reliable fault clearing in solar PV string and array circuits.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose This MCCB?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eDC-rated design\u003c\/strong\u003e — purpose-built for solar PV DC circuits, not repurposed AC breakers\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eDual voltage options\u003c\/strong\u003e — DC500V for standard systems, DC1000V for high-voltage string configurations\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eHigh current ratings\u003c\/strong\u003e — 125A and 250A cover small residential to large commercial solar arrays\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eMultiple pole configurations\u003c\/strong\u003e — 1P, 2P, and 4P for flexible system design\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eOverload + short-circuit protection\u003c\/strong\u003e — dual protection mechanism for comprehensive system safety\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCE certified\u003c\/strong\u003e — meets European electrical safety standards\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eMolded case construction\u003c\/strong\u003e — robust housing for industrial and outdoor electrical panel installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePole Configuration Guide\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003ePoles\u003c\/th\u003e\n\u003cth\u003eUse Case\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle positive or negative conductor protection\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e2P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBoth positive and negative conductors (standard solar string protection)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e4P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-string or three-phase inverter DC input protection\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSolar PV string combiner box protection\u003c\/li\u003e\n  \u003cli\u003eDC main disconnect between solar array and inverter\u003c\/li\u003e\n  \u003cli\u003eBattery storage system DC protection\u003c\/li\u003e\n  \u003cli\u003eOff-grid solar system main breaker\u003c\/li\u003e\n  \u003cli\u003eCommercial and industrial solar array protection\u003c\/li\u003e\n  \u003cli\u003eEV charging station DC circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use a standard AC MCCB for my solar system?\u003c\/strong\u003e\u003cbr\u003eA: No. Standard AC MCCBs are not rated for DC interruption and may fail to clear DC faults safely, creating fire and electrocution hazards. Always use DC-rated breakers in solar PV applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I select the correct pole count?\u003c\/strong\u003e\u003cbr\u003eA: For standard two-wire solar string circuits, use a 2P breaker to protect both positive and negative conductors. For grounded systems where only one conductor is switched, a 1P breaker may be used on the ungrounded conductor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between DG1-125 and DG1-250?\u003c\/strong\u003e\u003cbr\u003eA: DG1-125 is rated for DC 500V \/ 125A — suitable for smaller residential and commercial systems. DG1-250 is rated for DC 1000V \/ 250A — designed for larger high-voltage string systems and commercial-scale installations.\u003c\/p\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× DC Solar MCCB Circuit Breaker (model and pole count as selected)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"250A \/ 2","offer_id":47802824294635,"sku":"125:151;567:200003392#250A","price":115.68,"currency_code":"USD","in_stock":true},{"title":"250A \/ 4","offer_id":47802824327403,"sku":"125:153;567:200003392#250A","price":338.59,"currency_code":"USD","in_stock":true},{"title":"125A \/ 1","offer_id":47802824360171,"sku":"125:150;567:200003391#125A","price":64.61,"currency_code":"USD","in_stock":true},{"title":"125A \/ 2","offer_id":47802824392939,"sku":"125:151;567:200003391#125A","price":82.29,"currency_code":"USD","in_stock":true},{"title":"125A \/ 4","offer_id":47802824425707,"sku":"125:153;567:200003391#125A","price":152.57,"currency_code":"USD","in_stock":true},{"title":"250A \/ 1","offer_id":47802824458475,"sku":"125:150;567:200003392#250A","price":87.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/dc-solar-mccb-circuit-breaker-main.webp?v=1770788877","url":"https:\/\/keszoox.com\/products\/dc-solar-mccb-circuit-breaker-1p-2p-4p-dc500v-1000v-125a-250a","provider":"Keszoox","version":"1.0","type":"link"}