{"product_id":"allen-bradley-81001-355-71-r-scr-350a-6-5kv-rectifier","title":"Allen-Bradley 81001-355-71-R SCR 350A 6.5kV Rectifier","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e81001-355-71-R\u003c\/strong\u003e is a \u003cstrong\u003esilicon-controlled rectifier (SCR)\u003c\/strong\u003e module manufactured by \u003cstrong\u003eAllen-Bradley (Rockwell Automation)\u003c\/strong\u003e. Designed for high-power industrial applications, this thyristor module handles \u003cstrong\u003e350 amps\u003c\/strong\u003e at \u003cstrong\u003e6.5 kV\u003c\/strong\u003e in a \u003cstrong\u003ethree-phase, full-wave, six-pulse bridge rectifier\u003c\/strong\u003e configuration. It is widely deployed in medium-voltage AC motor control, variable speed drives, heating systems, and power regulation equipment.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 350 A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 6.5 kV\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Three-phase, full-wave, six-pulse SCR bridge rectifier\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e Industrial power module\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +125°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.13 lbs (59 g)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Motor drives, heating systems, process control power regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Power Density:\u003c\/strong\u003e 350 A \/ 6.5 kV ratings support demanding medium-voltage motor control applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSix-Pulse Bridge Design:\u003c\/strong\u003e Full-wave rectification delivers smooth DC output with reduced ripple for drive systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRapid Switching:\u003c\/strong\u003e SCR technology enables precise phase-angle control for variable speed and torque regulation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Lightweight 0.13 lb design simplifies integration into existing power assemblies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Temperature Range:\u003c\/strong\u003e Operates from -40°C to +125°C for reliability in harsh industrial environments.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the primary application of the 81001-355-71-R?\u003c\/strong\u003e\u003cbr\u003eA: The module is used to control and regulate AC power in \u003cstrong\u003emedium-voltage motor drives, heating systems, and industrial power supplies\u003c\/strong\u003e by acting as a high-power switching rectifier.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a single SCR or a bridge assembly?\u003c\/strong\u003e\u003cbr\u003eA: The 81001-355-71-R is configured as a \u003cstrong\u003ethree-phase, full-wave, six-pulse SCR bridge rectifier\u003c\/strong\u003e — a complete bridge assembly rather than a discrete device.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this module be used in standalone or master-slave drive configurations?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the bridge configuration supports both \u003cstrong\u003estandalone and master-slave variable speed control setups\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMount the module on a \u003cstrong\u003eheat sink\u003c\/strong\u003e with adequate thermal capacity for 350 A continuous operation.\u003c\/li\u003e\n  \u003cli\u003eApply \u003cstrong\u003ethermal compound\u003c\/strong\u003e between the module base and heat sink to ensure efficient heat transfer.\u003c\/li\u003e\n  \u003cli\u003eConnect three-phase AC input to the \u003cstrong\u003eanode terminals\u003c\/strong\u003e and DC output to the \u003cstrong\u003ecathode terminals\u003c\/strong\u003e per the wiring diagram.\u003c\/li\u003e\n  \u003cli\u003eInstall \u003cstrong\u003eRC snubber circuits\u003c\/strong\u003e across each SCR to suppress voltage transients during switching.\u003c\/li\u003e\n  \u003cli\u003eVerify gate trigger signals with a \u003cstrong\u003eoscilloscope\u003c\/strong\u003e before energizing the power circuit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Margin:\u003c\/strong\u003e Ensure the 6.5 kV rating exceeds your system peak voltage by at least 20% to accommodate line transients.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat Sink Sizing:\u003c\/strong\u003e Calculate thermal resistance requirements based on 350 A load current and maximum ambient temperature.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSnubber Matching:\u003c\/strong\u003e Select snubber resistor and capacitor values compatible with the SCR's dv\/dt rating to prevent false triggering.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpare Inventory:\u003c\/strong\u003e Maintain a spare bridge assembly to minimize downtime in critical drive applications.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53993615130808,"sku":"81001-355-71-R","price":223.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/81001-355-71-R_93d63e66-8b93-4cee-9414-ddadab28404e.png?v=1787814481","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-81001-355-71-r-scr-350a-6-5kv-rectifier","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}