{"product_id":"siemens-thermal-overload-relay-24v-dc","title":"Siemens\tThermal Overload Relay 24V DC","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThe \u003cstrong\u003eSiemens Thermal Overload Relay\u003c\/strong\u003e (specifically the 3RU21 series which includes models compatible with\u003cstrong\u003e 24V DC \u003c\/strong\u003econtrol voltage) is an electrical protection device designed to protect motors from damage caused by excessive current due to overload or phase failure. It provides current-dependent protection for motors with normal starting by monitoring the motor current and responding to temperature rises in the motor windings.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eHere are the key features and working principles:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"marker:text-quiet list-disc\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eIt detects an overload or phase failure when the motor current exceeds a preset rated current.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eHeating elements inside the relay cause bimetal strips to bend in response to the current rise.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThe bending of bimetal strips triggers auxiliary contacts that switch off the load through a contactor (the contactor is separate from the relay).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eIt has adjustable overload current settings (for example, 14A to 20A in some models).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThe relay includes a tripping indicator and can be manually or automatically reset after a fault.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eIt operates with DC control voltages such as 24V DC for the coil.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"UrjaPoint Electrical's Pvt. Ltd. Powered by Arvizon Global Enterprises Pvt. Ltd.","offers":[{"title":"5A \/ Gray","offer_id":42700466913489,"sku":null,"price":300.0,"currency_code":"INR","in_stock":true},{"title":"5A \/ Silver","offer_id":42700466946257,"sku":null,"price":300.0,"currency_code":"INR","in_stock":true},{"title":"5A \/ Black","offer_id":42700466979025,"sku":null,"price":300.0,"currency_code":"INR","in_stock":true},{"title":"10A \/ Gray","offer_id":42700467011793,"sku":null,"price":400.0,"currency_code":"INR","in_stock":true},{"title":"10A \/ Silver","offer_id":42700467044561,"sku":null,"price":400.0,"currency_code":"INR","in_stock":true},{"title":"10A \/ Black","offer_id":42700467077329,"sku":null,"price":400.0,"currency_code":"INR","in_stock":true},{"title":"16A \/ Gray","offer_id":42700467110097,"sku":null,"price":500.0,"currency_code":"INR","in_stock":true},{"title":"16A \/ Silver","offer_id":42700467142865,"sku":null,"price":500.0,"currency_code":"INR","in_stock":true},{"title":"16A \/ Black","offer_id":42700467175633,"sku":null,"price":500.0,"currency_code":"INR","in_stock":true},{"title":"25A \/ Gray","offer_id":42700467208401,"sku":null,"price":600.0,"currency_code":"INR","in_stock":true},{"title":"25A \/ Silver","offer_id":42700467241169,"sku":null,"price":600.0,"currency_code":"INR","in_stock":true},{"title":"25A \/ Black","offer_id":42700467273937,"sku":null,"price":600.0,"currency_code":"INR","in_stock":true},{"title":"30A \/ Gray","offer_id":42700467306705,"sku":null,"price":700.0,"currency_code":"INR","in_stock":true},{"title":"30A \/ Silver","offer_id":42700467339473,"sku":null,"price":700.0,"currency_code":"INR","in_stock":true},{"title":"30A \/ Black","offer_id":42700467372241,"sku":null,"price":700.0,"currency_code":"INR","in_stock":true},{"title":"40A \/ Gray","offer_id":42700467405009,"sku":null,"price":740.0,"currency_code":"INR","in_stock":true},{"title":"40A \/ Silver","offer_id":42700467437777,"sku":null,"price":740.0,"currency_code":"INR","in_stock":true},{"title":"40A \/ Black","offer_id":42700467470545,"sku":null,"price":740.0,"currency_code":"INR","in_stock":true},{"title":"50A \/ Gray","offer_id":42700467503313,"sku":null,"price":780.0,"currency_code":"INR","in_stock":true},{"title":"50A \/ Silver","offer_id":42700467536081,"sku":null,"price":780.0,"currency_code":"INR","in_stock":true},{"title":"50A \/ Black","offer_id":42700467568849,"sku":null,"price":780.0,"currency_code":"INR","in_stock":true},{"title":"63A \/ Gray","offer_id":42700467601617,"sku":null,"price":800.0,"currency_code":"INR","in_stock":true},{"title":"63A \/ Silver","offer_id":42700467634385,"sku":null,"price":800.0,"currency_code":"INR","in_stock":true},{"title":"63A \/ Black","offer_id":42700467667153,"sku":null,"price":800.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/4039\/9057\/files\/overload-relay-1-6-2-5a-3ua50-siemens-3ua5000-1c-500x500.webp?v=1755689086","url":"https:\/\/urjapoint.com\/products\/siemens-thermal-overload-relay-24v-dc","provider":"UrjaPoint Electricals powered by Arvizon Global Enterprises Pvt. Ltd.","version":"1.0","type":"link"}