{"product_id":"allen-bradley-140m-k8p-d40-motor-protection-circuit-breaker","title":"Allen-Bradley 140M-K8P-D40 Motor Protection Circuit Breaker","description":"\u003ch1\u003eAllen-Bradley 140M-K8P-D40 Motor Protection Circuit Breaker\u003c\/h1\u003e\n\u003cp\u003eConfigured for adjustable magnetic motor branch protection in Bulletin 140M motor control systems, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 140M-K8P-D40\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e140M-K8P\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMotor Protection Circuit Breaker) provides direct electrical interruption for high-current three-phase motor feeders with fixed thermal characteristics and magnetic-only trip execution.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe provided documentation identifies the unit as a fixed catalog configuration within the Bulletin 140M series. No manufacturer-defined suffix matrix or configurable ordering breakdown was specified in the source material.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e140M-K8P-D40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eMotor Protection Circuit Breaker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eBulletin 140M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame Size\u003c\/td\u003e\n\u003ctd\u003eK Frame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePole Configuration\u003c\/td\u003e\n\u003ctd\u003e3 Pole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Current\u003c\/td\u003e\n\u003ctd\u003e120 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrip Range\u003c\/td\u003e\n\u003ctd\u003e2000-4000 A magnetic trip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Type\u003c\/td\u003e\n\u003ctd\u003eAdjustable magnetic only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e480 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Rating\u003c\/td\u003e\n\u003ctd\u003e90 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterrupt Rating\u003c\/td\u003e\n\u003ctd\u003eHigh break\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Impulse Withstand Voltage\u003c\/td\u003e\n\u003ctd\u003e8 kV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Operating Temp\u003c\/td\u003e\n\u003ctd\u003e-25 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Operating Temp\u003c\/td\u003e\n\u003ctd\u003e70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Storage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Storage Temp\u003c\/td\u003e\n\u003ctd\u003e80 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation Altitude\u003c\/td\u003e\n\u003ctd\u003e1000 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003ePanel mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e8.80 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive protection device; no external control power required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEtherNet\/IP and Backplane Integration Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe Bulletin 140M protection platform is commonly deployed alongside Allen-Bradley motor control assemblies interfaced through deterministic industrial networks including EtherNet\/IP architectures. In coordinated motor control panels, the breaker trip state is typically monitored through auxiliary contact assemblies connected to Logix input structures for status acquisition and interlock handling.\u003c\/p\u003e\n\u003cp\u003eThe K-frame mechanical construction supports higher feeder density within MCC sections while maintaining clearance spacing for high magnetic trip thresholds. Firmware dependency is not applicable to the breaker itself because trip execution is electromechanical rather than processor-controlled.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 140M-K8P-D40 support hot replacement while the motor feeder remains energized?\u003cbr\u003eA: Mechanical replacement should only be performed after upstream isolation and lockout procedures are completed. The breaker is not specified for energized insertion or removal.\u003c\/p\u003e\n\u003cp\u003eQ: Is external control power required for trip operation?\u003cbr\u003eA: No. Magnetic trip execution operates independently from auxiliary control voltage sources. Protective interruption is performed internally by the breaker mechanism.\u003c\/p\u003e\n\u003cp\u003eQ: Can the breaker be mounted directly beside other high-current devices in a control enclosure?\u003cbr\u003eA: Side-by-side mounting depends on enclosure thermal conditions and manufacturer spacing practices. Heat dissipation and conductor bending radius must be verified during panel layout.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eVerify conductor torque against terminal labeling before energization.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSeparate motor power conductors from low-level analog or communication wiring inside the enclosure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUse copper conductors within the specified terminal wire range and insulation rating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConfirm short-circuit coordination with upstream protective devices before commissioning.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintain enclosure grounding continuity between panel backplate, breaker mounting structure, and incoming feeder ground.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerform insulation resistance testing on feeder conductors before connecting the motor branch circuit to the breaker terminals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43417446219866,"sku":"140M-K8P-D40","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/140M-K8P-D402.jpg?v=1779781409","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-140m-k8p-d40-motor-protection-circuit-breaker","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}