{"product_id":"carrier-hk50aa035-csb-b1-current-sensor-control-board","title":"Carrier HK50AA035 CSB-B1 Current Sensor Control Board","description":"\u003cdiv\u003e\u003cp\u003eThe Carrier HK50AA035 Current Sensor Board is an OEM replacement component for Carrier 30RB chillers, delivering precise current sensing to support compressor protection and lockout logic. This CSB (Current Sensor Board) integrates with the chiller’s control circuit to monitor motor current and trigger protective actions when abnormal current is detected, helping prevent compressor damage during faults or startup surges. Marketed as the official HK50AA035 Current Sensor Board by Carrier, it is stocked by HVAC distributors as a direct replacement part and designed to drop into the same harness and control interface used by the 30RB unit without additional modification. In carrier catalogs and retailer listings, the part is associated with Carrier 30RB chillers and, in some listings, with other Carrier systems in the same line such as 30GTN. The board is prized for OEM-grade electrical characteristics aimed at compatible impedance and signaling with the original control circuitry, preserving safety interlocks and protection schemes. Availability is noted across major parts channels, including Encompass and Repair Clinic, which list HK50AA035 as a current sensor board for Carrier equipment. This listing helps technicians minimize downtime by providing a direct replacement option for failed current sensor functionality in commercial HVACR applications. \u003c\/p\u003e\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51677731324206,"sku":null,"price":217.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_2743d9e4-6c14-43c6-afd3-dc5851c6e3c0.jpg?v=1769567046","url":"https:\/\/plgautomation.com\/products\/carrier-hk50aa035-csb-b1-current-sensor-control-board","provider":"PLG Automation ","version":"1.0","type":"link"}