{"product_id":"siemens-5sj4240-7hg42-40a-240v-2-pole-miniature-circuit-breaker","title":"Siemens 5sj4240-7hg42 40A 240V 2 Pole Miniature Circuit Breaker","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SIEMENS 5sj4240-7hg42 is a Sentron Type NSJ miniature circuit breaker rated for 240 volts AC at 40 amps, designed for 2-pole, single-phase overcurrent protection in low-voltage electrical distribution systems. It features thermal magnetic trip action, providing both overload and short-circuit protection in a single compact device. The breaker is rated for a 14 kA interrupt capacity and operates at 50 Hz. It mounts on a standard DIN rail and accepts line, load, and screw-type connections. Licensed electricians working on commercial panels, distribution boards, and industrial control enclosures are the primary installers of this device.\u003c\/p\u003e\n\u003cp\u003eThis circuit breaker is suited for residential, commercial, and light industrial panel applications where DIN rail-mounted overcurrent protection is required. The handle actuator provides direct manual switching. Its IP20 enclosure rating makes it appropriate for use inside protected electrical enclosures and switchgear assemblies. The operating temperature range of -25 to 55 degrees C makes it viable across a wide range of installation environments, including unheated mechanical rooms and outdoor-rated enclosures where ambient temperatures remain within this range.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e40 amp continuous rating at 240 volts AC for robust overcurrent protection\u003c\/li\u003e\n  \u003cli\u003e14 kA interrupt capacity handles high fault-current environments\u003c\/li\u003e\n  \u003cli\u003eThermal magnetic trip responds to both sustained overloads and instantaneous short circuits\u003c\/li\u003e\n  \u003cli\u003e2-pole configuration for single-phase branch circuit protection\u003c\/li\u003e\n  \u003cli\u003eDIN rail mounting for fast, tool-efficient installation in standard enclosures\u003c\/li\u003e\n  \u003cli\u003eAccepts 14 to 4 AWG wire via screw-type line and load connections\u003c\/li\u003e\n  \u003cli\u003eIP20 enclosure rating suitable for use inside protected switchgear assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style DIN rail miniature circuit breaker for use in standard switchgear enclosures, distribution boards, and industrial control panels that accept Type NSJ Sentron series breakers with 2-pole configurations.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed electrician in accordance with the NEC and any applicable local codes. De-energize and lock out the panel or distribution board before installing or removing the breaker. Verify that wire gauge falls within the 14 to 4 AWG range before making screw-terminal connections and confirm torque requirements against the panel documentation or enclosure label. Do not exceed the rated voltage, amperage, or interrupt capacity of this device.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: NSJ Sentron Miniature Circuit Breaker\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 240 volts AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmperage Rating\u003c\/strong\u003e: 40 amps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency\u003c\/strong\u003e: 50 Hz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterrupt Capacity\u003c\/strong\u003e: 14 kA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrip Type\u003c\/strong\u003e: Thermal Magnetic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePhase\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActuator Type\u003c\/strong\u003e: Handle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Line\/Load\/Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Range\u003c\/strong\u003e: 14 to 4 AWG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnclosure Rating\u003c\/strong\u003e: IP20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting\u003c\/strong\u003e: DIN Rail\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e: -25 to 55 degrees C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (H x W x D)\u003c\/strong\u003e: 4.76 inches H x 1.42 inches W x 2.76 inches D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SIEMENS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5sj4240-7hg42\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIEMENS","offers":[{"title":"Default Title","offer_id":51267851551026,"sku":"5SJ4240-7HG42","price":237.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308913330.jpg?v=1780692172","url":"https:\/\/voomisupply.com\/products\/siemens-5sj4240-7hg42-40a-240v-2-pole-miniature-circuit-breaker","provider":"Voomi Supply","version":"1.0","type":"link"}