{"product_id":"ba33a-cutler-hammer-overload-relay-amp-min-19a-amp-max-90a","title":"Eaton BA33A – NEMA A200 Type B Thermal Overload Relay | 3-Pole | 19–90A | Class 20","description":"\u003cp\u003eThe \u003cstrong\u003eEaton BA33A\u003c\/strong\u003e is a NEMA A200 series, Type B, bimetallic thermal overload relay designed to protect three-phase industrial motors across an exceptionally wide current range of \u003cstrong\u003e19 to 90 amperes\u003c\/strong\u003e. Built to Class 20 trip standards, it offers reliable overload protection for both single-phase and three-phase applications, making it one of the most versatile overload relays in the Eaton lineup.\u003c\/p\u003e\n\u003cp\u003eAlso sold as the \u003cstrong\u003eCutler-Hammer BA33A\u003c\/strong\u003e, this relay is a drop-in modern replacement for Type A overload relays in manual reset applications. Its bimetallic, block-type design delivers consistent performance in demanding industrial environments.\u003c\/p\u003e\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BA33A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton (Cutler-Hammer)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e NEMA A200 \/ Freedom Series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelay Type:\u003c\/strong\u003e Thermal, Type B (Bimetallic)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Class:\u003c\/strong\u003e Class 20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Load Current Range:\u003c\/strong\u003e 19–90A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuxiliary Contact:\u003c\/strong\u003e 1NC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Starter Mounted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Compensation:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure Rating:\u003c\/strong\u003e NEMA 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Type:\u003c\/strong\u003e Threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e 40°C to 75°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 24–600V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNEMA Size:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e UL Listed, CSA Certified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose the Eaton BA33A?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidest Current Coverage:\u003c\/strong\u003e A 19–90A range covers NEMA Size 3 starters and a broad spectrum of motor HP ratings in a single relay — reducing the number of SKUs you need to stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType B Bimetallic Design:\u003c\/strong\u003e Modern block-type bimetallic construction provides Class 20 protection in both single- and three-phase applications — more flexible than older eutectic alloy designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-In Type A Replacement:\u003c\/strong\u003e The BA33A is a direct upgrade for Type A (AA-series) overload relays in manual reset mode, including the BA23A and AA23A where range overlap exists.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Compensated:\u003c\/strong\u003e Accurate trip performance across a 40–75°C ambient temperature range — ideal for hot panel environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase Failure Protection:\u003c\/strong\u003e Single-phase trip detection protects motors from running on two legs, a leading cause of motor burnout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNEMA Size 3 motor starters (25–50 HP at 480V)\u003c\/li\u003e\n\u003cli\u003eLarge pump and compressor motor protection\u003c\/li\u003e\n\u003cli\u003eIndustrial conveyor and material handling drives\u003c\/li\u003e\n\u003cli\u003eHVAC air handler and chiller motor panels\u003c\/li\u003e\n\u003cli\u003eHeavy industrial manufacturing equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility \u0026amp; Cross-Reference\u003c\/h3\u003e\n\u003cp\u003eThe BA33A is compatible with Eaton A200, A210, and A250 NEMA Size 3 motor starters. It ships with a contactor mounting bracket, the overload relay, and connection straps. The BA33A serves as a direct replacement for Type A relays (including AA33A) in 3-pole manual reset configurations.\u003c\/p\u003e","brand":"Eaton","offers":[{"title":"New","offer_id":48396202049784,"sku":"BA33A-N","price":274.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/1209\/3176\/files\/BA33A.png?v=1779904973","url":"https:\/\/alphabreakersandcontrols.com\/products\/ba33a-cutler-hammer-overload-relay-amp-min-19a-amp-max-90a","provider":"Alpha Breakers \u0026 Controls","version":"1.0","type":"link"}