{"product_id":"rheem-47-21663-01-limit-switch-auto-reset-normally-closed-spst-l140-10f","title":"Rheem 47-21663-01 Limit Switch, Auto Reset, Normally Closed, SPST, L140-10F","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eRheem 47-21663-01\u003c\/strong\u003e is a precision-engineered limit switch designed for reliable thermal protection in heating systems. This component serves as a critical safety device, automatically monitoring and responding to temperature conditions to protect your equipment from overheating damage.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 47-21663-01\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitch Type:\u003c\/strong\u003e Single-Pole, Single-Throw (SPST)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCircuit Configuration:\u003c\/strong\u003e Normally Closed (N\/C)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReset Type:\u003c\/strong\u003e Automatic Reset (A\/R)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpening Temperature:\u003c\/strong\u003e 140°F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClosing Temperature:\u003c\/strong\u003e 130°F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel Designation:\u003c\/strong\u003e L140-10F\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eThis limit switch operates in a \u003cstrong\u003eNormally Closed\u003c\/strong\u003e position under standard conditions, allowing the circuit to function as intended during normal operation. When temperatures reach the \u003cstrong\u003eopening threshold of 140°F\u003c\/strong\u003e, the switch automatically opens the circuit, interrupting operation to prevent overheating. Once temperatures drop back down to \u003cstrong\u003e130°F\u003c\/strong\u003e, the switch automatically resets and closes the circuit, restoring normal system operation — no manual intervention required.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomatic Reset:\u003c\/strong\u003e Eliminates the need for manual resetting after the switch trips, reducing downtime and service calls\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNormally Closed Design:\u003c\/strong\u003e Ensures the system remains operational under safe temperature conditions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSPST Configuration:\u003c\/strong\u003e Simple and reliable single-pole, single-throw switching for straightforward integration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Temperature Differential:\u003c\/strong\u003e A 10°F differential between opening (140°F) and closing (130°F) temperatures ensures stable, consistent performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Rheem Part:\u003c\/strong\u003e Manufactured to exact Rheem specifications for guaranteed compatibility and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eThis is a \u003cstrong\u003egenuine Rheem OEM replacement part\u003c\/strong\u003e engineered to meet the exact standards of your Rheem heating system. Always verify your equipment's model and part number against your system's documentation or existing component to ensure proper fitment before installation.\u003c\/p\u003e\n\n\u003ch3\u003eDimensions\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.0\" \u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5\" \u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5\" \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Rheem","offers":[{"title":"Default Title","offer_id":51514281460018,"sku":"47-21663-01","price":18.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/malachypartsplus.com\/es\/products\/rheem-47-21663-01-limit-switch-auto-reset-normally-closed-spst-l140-10f","provider":"Malachy Parts+","version":"1.0","type":"link"}