{"product_id":"ansul-microswitch-spdt-423878","title":"Ansul Microswitch, SPDT - 423878","description":"\u003cbody\u003e\n\n\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\n\u003ctitle\u003eAnsul Microswitch, SPDT | 423878\u003c\/title\u003e\n\u003cstyle\u003e\n  .product-section { max-width: 100%; margin: 2rem 0; font-family: Arial, sans-serif; color: #333; }\n  .accordion-item { border-bottom: 1px solid #ddd; }\n  .accordion-header { display: flex; justify-content: space-between; padding: 2rem 0; cursor: pointer; background: none; border: none; width: 100%; text-align: left; color: #333; }\n  .accordion-header:hover, .accordion-header:focus { color: #333; background: none; outline: none; }\n  .accordion-title { font-size: 1.5rem; font-weight: 500; }\n  .accordion-icon { font-size: 1.5rem; }\n  .accordion-item.active .accordion-icon { transform: rotate(180deg); }\n  .accordion-content { max-height: 0; overflow: hidden; }\n  .accordion-item.active .accordion-content { max-height: none; }\n  .accordion-content-inner { font-size: 1.4rem; line-height: 1.7; color: #555; padding-bottom: 2rem; }\n  .accordion-content-inner p { margin: 0 0 1rem 0; }\n  .accordion-content-inner ul { margin: 0 0 1rem 0; padding-left: 2rem; }\n  .accordion-content-inner li { margin-bottom: 0.4rem; }\n  .accordion-content-inner h3 { font-size: 1.4rem; font-weight: 600; color: #333; margin: 1.5rem 0 0.5rem 0; }\n  .specs-table { width: 100%; border-collapse: collapse; }\n  .specs-table th, .specs-table td { border: 1px solid #ddd; padding: 0.75rem 1rem; font-size: 1.4rem; text-align: left; }\n  .specs-table th { background-color: #f5f5f5; font-weight: 600; color: #333; }\n\u003c\/style\u003e\n\n\n\u003cdiv class=\"product-section\"\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eProduct Overview\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003cp\u003eThe Ansul Microswitch, SPDT (P\/N 423878) is a snap-action electric switch used with the AUTOMAN release mechanism in an Ansul R-102 Restaurant Fire Suppression System. When the release mechanism actuates, this switch trips and sends a signal to the building's fire alarm panel, letting the alarm system register that the kitchen suppression system has discharged. The switch kit ships with the mounting components and instructions needed for a technician to install it on the release mechanism enclosure.\u003c\/p\u003e\n      \u003cp\u003eBecause this switch is the link between a mechanical fire suppression actuation and the building's electrical alarm and monitoring systems, its proper function is part of what a technician verifies during scheduled testing. With the AUTOMAN mechanism in the cocked, ready position, pressing the switch lever by hand should produce an audible click, confirming the switch is making contact correctly before relying on it to report an actual discharge event.\u003c\/p\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eTechnical Specifications\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003ctable class=\"specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAnsul (A Johnson Controls Brand)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e423878\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eComponent Type\u003c\/td\u003e\n\u003ctd\u003eSPDT Snap-Action Microswitch\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eElectrical Rating\u003c\/td\u003e\n\u003ctd\u003e50 mA, 28 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eAnsul AUTOMAN Release Mechanism, R-102 System\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eSignals Fire Alarm Panel on System Actuation\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eInstallation and Compliance\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003cp\u003eKitchen suppression systems are pre-engineered systems under NFPA 17A, and installing or replacing this microswitch must be performed by an Ansul certified distributor, since correct wiring to the building fire alarm panel is part of the overall fire alarm system's certified design.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSemiannual Professional Service:\u003c\/strong\u003e A qualified technician tests the switch by pressing its lever with the AUTOMAN mechanism in the cocked, ready position and confirming an audible click, verifying the switch makes contact correctly.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eAlarm Panel Coordination:\u003c\/strong\u003e Any replacement or rewiring of this switch should be coordinated with the fire alarm system's service provider to confirm the signal is still correctly received and logged at the panel.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePost-Discharge Check:\u003c\/strong\u003e After any actual system actuation, confirm the switch correctly signaled the fire alarm panel as part of the post-discharge inspection and recertification process.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eFAQ\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003ch3\u003eWhat does SPDT mean and why does it matter here?\u003c\/h3\u003e\n      \u003cp\u003eSPDT stands for single pole, double throw, meaning the switch has one common terminal that can connect to either of two other terminals depending on its position. This allows the switch to be wired for both normally open and normally closed circuit configurations, giving flexibility in how it integrates with different fire alarm panel designs.\u003c\/p\u003e\n      \u003ch3\u003eDoes this switch shut off gas or electrical equipment directly?\u003c\/h3\u003e\n      \u003cp\u003eNo. This microswitch is specifically for signaling the fire alarm panel that the suppression system has actuated. Gas shutoff on actuation is handled by separate mechanical or electric gas valves elsewhere in the system, not by this alarm signaling switch.\u003c\/p\u003e\n      \u003ch3\u003eCan I test this switch myself between scheduled service visits?\u003c\/h3\u003e\n      \u003cp\u003eRoutine functional testing of this switch should be performed by a certified technician as part of scheduled service, since it involves working directly on the release mechanism and verifying the alarm panel correctly receives the signal, which is outside the scope of a basic visual inspection.\u003c\/p\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  document.querySelectorAll('.accordion-header').forEach(h =\u003e h.addEventListener('click', function() { this.parentElement.classList.toggle('active'); }));\n});\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Ansul Microswitch, SPDT | 423878\",\n  \"description\": \"OEM SPDT snap-action microswitch for the Ansul AUTOMAN release mechanism in R-102 Restaurant Fire Suppression Systems. Rated 50 mA, 28 VDC. Signals the building fire alarm panel when the suppression system actuates. Installation must be performed by an Ansul certified distributor.\",\n  \"sku\": \"423878\",\n  \"mpn\": \"423878\",\n  \"brand\": { \"@type\": \"Brand\", \"name\": \"Ansul\" },\n  \"category\": \"Fire Suppression Equipment\"\n}\n\u003c\/script\u003e\n\n\u003c\/body\u003e","brand":"Ansul","offers":[{"title":"Default Title","offer_id":47796193165477,"sku":null,"price":42.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/5605\/8021\/files\/ansul_microswitch_spdt_-_423878.png?v=1777926003","url":"https:\/\/profireandsafety.com\/products\/ansul-microswitch-spdt-423878","provider":"Pro Fire and Safety","version":"1.0","type":"link"}