{"product_id":"a075f135","title":"Cummins OTEC Spec C Automatic Transfer Switch 208V 3-Phase 225A PC40-11 Controller","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eCummins OTEC Spec C Automatic Transfer Switch\u003c\/strong\u003e \u003cstrong\u003e208V 3-Phase \/ 225A \/ PC40-11 Controller \/ NEMA 1 \/ \u003cspan style=\"text-decoration: underline; color: rgb(255, 42, 0);\"\u003e\u003cem\u003eNot Service Rated\u003c\/em\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat This Unit Is\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThis is a 225-amp, 208-volt three-phase open-transition automatic transfer switch built for commercial buildings and light industrial facilities that need reliable backup power switching. It handles emergency circuits, code-mandated standby systems, and optional standby loads — covering most application types you'll encounter in the field.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe switch operates electrically and latches mechanically in both the normal and standby positions. That means even a complete loss of control power won't cause it to drift out of position. A break-before-make switching action is enforced at both the mechanical and electrical level, so there's no path for the utility and generator to become paralleled — even briefly.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eHeads Up — Updated Breaker Ratings:\u003c\/strong\u003e\u003c\/span\u003e Cummins issued revised Withstand Closing Breaker Ratings for the entire Spec C product family in September 2025. These changes took effect immediately, with full UL and CUL listing confirmed the prior month. Documentation supporting Authority Having Jurisdiction submittals is posted in the PDF section below.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat's New in the Spec C\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThree meaningful upgrades separate this generation from its predecessors. First, the controller has been updated to the PC40-11 platform, which brings a more capable interface and expanded communication options. Second, voltage imbalance sensing has been added — the switch can now detect unbalanced three-phase conditions on either source, not just over\/under voltage. Third, phase rotation monitoring is built in, which matters particularly when a generator is first commissioned or after service work.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eThe PC40-11 Controller\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe brains of the switch is a microprocessor-based controller with a backlit LCD and soft-touch buttons. Configuration can be done at the front panel or through a connected PC. Out of the box it communicates over Modbus RTU and TCP, supports configurable I\/O, and includes a programmable exercise scheduler. If you need more output contacts, expansion modules can be added later in the field — one module adds 8 configurable contact sets, two modules gives you 16. An Ethernet module, remote annunciator, and RS-485 Modbus option are also available if the project calls for them.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eContact and Arc Management\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe main contacts are silver alloy under high contact pressure, which keeps resistance low and resists the pitting that degrades switching performance over time. Separate arcing contacts take the brunt of each operation, protecting the main contacts from arc damage. Once an arc forms, a stack of arc chutes cools and extinguishes it quickly. The net result is a mechanism rated under UL 1008 for high-endurance duty — meaning it's tested and listed to handle the full switching load expected over the life of the equipment, not just a sampling of light-duty cycles.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSpecs at a Glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003e\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eVoltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e120\/208V, 3Ø, 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eAmperage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e225A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eEnclosure\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eNEMA 1 Indoor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eController\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003ePowerCommand PC40-11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eTransition Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eOpen Delayed; Open-In-Phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMax Transfer Time\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e6 cycles \/ 60 Hz (source to source, no programmed delay)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eNeutral Bar\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eFull-rated with lugs, standard on 3-pole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eAux Contacts\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e2x isolated N\/O, 10A\/250V, terminal block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eSurge Compliance\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eIEEE C62.41 \/ C62.42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eManual Override\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eYes — with all sources de-energized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eWarranty\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e1-Year Cummins Limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":42897262444649,"sku":"A075F135","price":3652.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0636\/8913\/0089\/files\/image-url_thumbnail_700b9016-5456-40c8-9986-10b6840a43d6.webp?v=1771638448","url":"https:\/\/www.mrvoltinc.com\/es\/products\/a075f135","provider":"Mr. Volt, Inc.","version":"1.0","type":"link"}