{"id":8901,"date":"2026-05-27T19:12:28","date_gmt":"2026-05-27T16:12:28","guid":{"rendered":"https:\/\/altal.md\/?post_type=product&#038;p=8901"},"modified":"2026-06-09T00:17:30","modified_gmt":"2026-06-08T21:17:30","slug":"thermal-overload-relay-gth-40-3","status":"publish","type":"product","link":"https:\/\/altal.md\/en\/releu-termic-gth-40-3\/","title":{"rendered":"Thermal relay GTH-40\/3 32\u201348A"},"content":{"rendered":"<hr data-rm-block-id=\"block-1\" \/>\n<h2 data-section-id=\"1n3wpi3\" data-start=\"0\" data-end=\"61\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Thermal relay GTH-40\/3 for electric motor protection<\/span><\/h2>\n<h3 data-section-id=\"1deqxma\" data-start=\"63\" data-end=\"82\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Product Description<\/span><\/h3>\n<p data-start=\"84\" data-end=\"439\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><strong data-start=\"84\" data-end=\"110\">Thermal relay GTH-40\/3<\/strong> is designed for safe and effective protection of electric motors against overload, rotor lock and phase loss. This thermal relay is used in industrial systems, electrical panels, HVAC installations, pumps and automated equipment where reliable protection of electrical circuits is required.<\/span><\/p>\n<p data-start=\"441\" data-end=\"759\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">The model <strong data-start=\"449\" data-end=\"474\">thermal relay GTH-40\/3<\/strong> offers precise current regulation and direct compatibility with the GMC-40 contactor, allowing for quick integration and simple installation into existing systems. The robust construction and manual or automatic reset function contribute to safe operation and long service life.<\/span><\/p>\n<p data-start=\"761\" data-end=\"929\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Due to the bimetallic construction and ambient temperature compensation, <strong data-start=\"834\" data-end=\"860\">thermal relay GTH-40\/3<\/strong> provides stable protection even in difficult industrial conditions.<\/span><\/p>\n<h3 data-section-id=\"lp5w73\" data-start=\"931\" data-end=\"969\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Advantages of the GTH-40\/3 thermal relay<\/span><\/h3>\n<ul data-start=\"971\" data-end=\"1281\">\n<li data-section-id=\"13ky4y3\" data-start=\"971\" data-end=\"1018\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Motor overload protection<\/span><\/li>\n<li data-section-id=\"zahf5x\" data-start=\"1019\" data-end=\"1051\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Phase loss protection<\/span><\/li>\n<li data-section-id=\"1kbe4dl\" data-start=\"1052\" data-end=\"1086\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Compatible with GMC-40 contactor<\/span><\/li>\n<li data-section-id=\"4m2l6a\" data-start=\"1087\" data-end=\"1118\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Precise current adjustment<\/span><\/li>\n<li data-section-id=\"18wktmp\" data-start=\"1119\" data-end=\"1152\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Manual or automatic reset<\/span><\/li>\n<li data-section-id=\"1ung08w\" data-start=\"1153\" data-end=\"1188\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Compact and reliable construction<\/span><\/li>\n<li data-section-id=\"jd1acw\" data-start=\"1189\" data-end=\"1231\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Quick installation and easy maintenance<\/span><\/li>\n<li data-section-id=\"1o1pbs\" data-start=\"1232\" data-end=\"1281\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Suitable for industrial and HVAC applications<\/span><\/li>\n<\/ul>\n<h3 data-section-id=\"qsuy26\" data-start=\"1283\" data-end=\"1311\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Main features<\/span><\/h3>\n<ul data-start=\"1313\" data-end=\"1606\">\n<li data-section-id=\"f3xcxw\" data-start=\"1313\" data-end=\"1351\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Compatible with GMC-40 contactors<\/span><\/li>\n<li data-section-id=\"686bey\" data-start=\"1352\" data-end=\"1386\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Operating voltage AC380V<\/span><\/li>\n<li data-section-id=\"1goypks\" data-start=\"1387\" data-end=\"1419\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Auxiliary contacts 1NO + 1NC<\/span><\/li>\n<li data-section-id=\"1fspk24\" data-start=\"1420\" data-end=\"1474\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Reliable thermal protection for electric motors<\/span><\/li>\n<li data-section-id=\"am60m9\" data-start=\"1475\" data-end=\"1534\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Available in multiple current regulation ranges<\/span><\/li>\n<li data-section-id=\"14ulq6l\" data-start=\"1535\" data-end=\"1606\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Manual reset function for safe restart after tripping<\/span><\/li>\n<\/ul>\n<h2 data-section-id=\"cl2ig7\" data-start=\"1608\" data-end=\"1631\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Technical specifications<\/span><\/h2>\n<p data-start=\"1633\" data-end=\"1857\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Model: GTH-40\/3<\/span><br data-start=\"1648\" data-end=\"1651\" \/><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Product type: Thermal overload relay<\/span><br data-start=\"1691\" data-end=\"1694\" \/><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Compatibility: GMC-40 Contactor<\/span><br data-start=\"1727\" data-end=\"1730\" \/><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Rated voltage: AC380V<\/span><br data-start=\"1755\" data-end=\"1758\" \/><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Reset type: Manual \/ automatic<\/span><br data-start=\"1790\" data-end=\"1793\" \/><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Auxiliary contact type: 1NO + 1NC<\/span><br data-start=\"1826\" data-end=\"1829\" \/><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Construction type: Bimetallic<\/span><\/p>\n<h4 data-section-id=\"1fgcybp\" data-start=\"1859\" data-end=\"1886\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Current adjustment ranges<\/span><\/h4>\n<ul data-start=\"1888\" data-end=\"1931\">\n<li data-section-id=\"91nqbb\" data-start=\"1888\" data-end=\"1898\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">18\u201326A<\/span><\/li>\n<li data-section-id=\"dnl2l5\" data-start=\"1899\" data-end=\"1909\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">24\u201336A<\/span><\/li>\n<li data-section-id=\"15kosd0\" data-start=\"1910\" data-end=\"1920\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">28\u201340A<\/span><\/li>\n<li data-section-id=\"4v4v7b\" data-start=\"1921\" data-end=\"1931\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">32\u201348A<\/span><\/li>\n<\/ul>\n<h2 data-section-id=\"dsi5qg\" data-start=\"1933\" data-end=\"1956\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Areas of use<\/span><\/h2>\n<p data-start=\"1958\" data-end=\"2006\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><strong data-start=\"1958\" data-end=\"1984\">Thermal relay GTH-40\/3<\/strong> is used for:<\/span><\/p>\n<ul data-start=\"2007\" data-end=\"2199\">\n<li data-section-id=\"125nd7r\" data-start=\"2007\" data-end=\"2040\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">protection of electric motors;<\/span><\/li>\n<li data-section-id=\"1d7n1p4\" data-start=\"2041\" data-end=\"2059\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">HVAC installations;<\/span><\/li>\n<li data-section-id=\"uy8n2g\" data-start=\"2060\" data-end=\"2083\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">pumps and compressors;<\/span><\/li>\n<li data-section-id=\"1v3o86w\" data-start=\"2084\" data-end=\"2108\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">ventilation systems;<\/span><\/li>\n<li data-section-id=\"ua61gt\" data-start=\"2109\" data-end=\"2136\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">industrial automation;<\/span><\/li>\n<li data-section-id=\"1s6cepb\" data-start=\"2137\" data-end=\"2158\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">electrical panels;<\/span><\/li>\n<li data-section-id=\"6027hd\" data-start=\"2159\" data-end=\"2199\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">commercial and industrial equipment.<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Frequently asked questions about Thermal relay GTH-40\/3<\/span><\/h3>\n<p class=\"isSelectedEnd\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><strong>1. What is the GTH-40\/3 thermal relay used for?<\/strong><\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">The GTH-40\/3 thermal relay is used to protect electric motors against overload, rotor lock and phase loss, preventing equipment failure and unplanned shutdowns.<\/span><\/p>\n<p class=\"isSelectedEnd\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><strong>2. What contactors is this thermal relay compatible with?<\/strong><\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">The GTH-40\/3 model is designed for use with the GMC-40 contactor, ensuring quick integration and reliable operation in electrical systems.<\/span><\/p>\n<p class=\"isSelectedEnd\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><strong>3. What current adjustment ranges are available?<\/strong><\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">The relay is available in several adjustment options: 18\u201326A, 24\u201336A, 28\u201340A and 32\u201348A, allowing adaptation to different powers of electric motors.<\/span><\/p>\n<p><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><strong>4. What type of reset does the GTH-40\/3 thermal relay offer?<\/strong><\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">The GTH-40\/3 thermal relay features manual and automatic reset, providing flexibility depending on the application requirements and the desired level of safety.<\/span><\/p>\n<h2><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Similar products<\/span><\/h2>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/altal.md\/en\/nylon-cable-ties-4-8-x-200-mm\/\" target=\"_blank\" rel=\"noopener\">Nylon cable ties 4.8 x 200 mm 100 pcs<\/a><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/altal.md\/en\/corrugated-conduit-18-5-mm-black-with-draw-wire\/\" target=\"_blank\" rel=\"noopener\">18.5 mm black corrugated tube with probe<\/a><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/altal.md\/en\/contactor-cjx2-d1810-18a-220v-ac3-75kw\/\" target=\"_blank\" rel=\"noopener\">Contactor CJX2-D1810<\/a><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/altal.md\/en\/tb-terminal-block-tb-4506\/\" target=\"_blank\" rel=\"noopener\">Small electrical cable fixing clips<\/a><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/altal.md\/en\/air-to-water-heat-pump-10kw-evi-dc-full-split\/\" target=\"_blank\" rel=\"noopener\">Air to water heat pump 10 kW<\/a><\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3 data-rm-block-id=\"block-62\"><span style=\"color: #000000; font-family: arial, helvetica, sans-serif;\"><a style=\"color: #000000;\" href=\"https:\/\/altal.md\/en\/contactor-gmc-32-15kw-32a-ac3-220v\/\" target=\"_blank\" rel=\"noopener\">See another model<\/a><\/span><\/h3>\n<hr data-rm-block-id=\"block-63\" \/>","protected":false},"excerpt":{"rendered":"<h2><span style=\"color: #800080; font-family: tahoma, arial, helvetica, sans-serif;\">Model: GTH-40\/3<\/span><\/h2>\n<ul>\n<li><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">Product type: Thermal overload relay<\/span><\/li>\n<li><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">Compatibility: GMC-40 Contactor<\/span><\/li>\n<li><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">Rated voltage: AC380V<\/span><\/li>\n<li><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">Reset type: Manual \/ automatic<\/span><\/li>\n<li><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">Auxiliary contact type: 1NO + 1NC<\/span><\/li>\n<li><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">Construction type: Bimetallic<\/span><\/li>\n<\/ul>\n<h3 data-section-id=\"1fgcybp\" data-start=\"1859\" data-end=\"1886\"><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">Current adjustment ranges<\/span><\/h3>\n<ul data-start=\"1888\" data-end=\"1931\">\n<li data-section-id=\"91nqbb\" data-start=\"1888\" data-end=\"1898\"><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">18\u201326A<\/span><\/li>\n<li data-section-id=\"dnl2l5\" data-start=\"1899\" data-end=\"1909\"><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">24\u201336A<\/span><\/li>\n<li data-section-id=\"15kosd0\" data-start=\"1910\" data-end=\"1920\"><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">28\u201340A<\/span><\/li>\n<li data-section-id=\"4v4v7b\" data-start=\"1921\" data-end=\"1931\"><span style=\"font-family: tahoma, arial, helvetica, sans-serif; color: #000000;\">32\u201348A<\/span><\/li>\n<\/ul>\n<hr \/>\n<p>&nbsp;<\/p>","protected":false},"featured_media":8906,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"product_brand":[198],"product_cat":[276,183,987],"product_tag":[953,952,961,954],"class_list":["post-8901","product","type-product","status-publish","has-post-thumbnail","product_brand-altal","product_cat-contactoare-electrice","product_cat-catalog","product_cat-produse-electrice","product_tag-220v","product_tag-380v","product_tag-40a","product_tag-releu-termic","product_shipping_class-greutate-mica","first","instock","sale","featured","taxable","shipping-taxable","purchasable","product-type-simple","entry","content-bg","loop-entry"],"acf":[],"_links":{"self":[{"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product\/8901","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/comments?post=8901"}],"version-history":[{"count":0,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product\/8901\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/media\/8906"}],"wp:attachment":[{"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/media?parent=8901"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product_brand?post=8901"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product_cat?post=8901"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product_tag?post=8901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}