[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-157853-105":59,"doc-detail-157853-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","sm51108pel-lan-10100-base-tx-voip-transformer-poe-modules-obsolete-not-recommended-for-new-designs","SM51108PEL LAN 10/100 Base-Tx VoIP Transformer (PoE) Modules - Obsolete - Not recommended for new designs","","SM51108PEL LAN 10/100 Base-Tx VoIP Transformer (PoE) Modules provide compliant operation with IEEE802.3 and support 10/100 Base-Tx plus Power over Ethernet. The document lists electrical parameters such as turns ratio, leakage inductance, capacitance, DCR, insertion loss, return loss, cross talk, and DCMRR, along with insulation test voltage and operating/storage temperature ranges. It also specifies environmental and moisture sensitivity levels, packaging via tape-and-reel (600 pcs./reel), soldering profile requirements, and ordering/model construction codes, while noting the series is available but obsolete and not recommended for new designs.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/sm51108pel-lan-10100-base-tx-voip-transformer-poe-modules-obsolete-not-recommended-for-new-designs/157853/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/sm51108pel-lan-10100-base-tx-voip-transformer-poe-modules-obsolete-not-recommended-for-new-designs/157853.png","ImageObject",300,407,{"name":92,"@type":93},"Oliver Hayes","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-12","2026-08-29",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",14,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What standards and operating modes are supported by the SM51108PEL module?","Question",{"text":113,"@type":114},"It is compliant with IEEE802.3 standards and designed for 10/100 Base-Tx operation with Power over Ethernet (PoE).","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What key electrical performance parameters are specified?",{"text":118,"@type":114},"The document provides turns ratio, leakage inductance, capacitance, DCR, insertion loss, return loss, cross talk, and DCMRR, including limits across multiple frequency ranges.",{"name":120,"@type":111,"acceptedAnswer":121},"Is the SM51108PEL recommended for new designs?",{"text":122,"@type":114},"No. The document states the series is currently available but not recommended for new designs, and recommends the newer model SM13126PEL.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},157853,1787990374,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":81,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":130,"read_time":39},687207020761,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","Features  \nn Compliant with IEEE802 .3 standards  \nn Designed for 10/100 Base-Tx and PoE  \nn RoHS compliant*  \nThis series is currently available but  \nnot recommended for new designs. The newer model SM13126PEL is recommended.  \nSM51108PEL LAN 10/100 Base-Tx VoIP Transformer (PoE) Modules  \nElectrical Specifications @ 25 °C  \nTurns Ratio (±3 %) ................... 1CT:1CTOCL (@100 kHz,  \n0.1 V, 8 mA, DC Bias)   350 µH min.  \nLeakage Inductance (@100 kHz, 0.1 V with 1-2-3-6-7-8 Short)  \n9-11 = 14-16 .................... 0.5 µH max. Cw/w @ 100 kHz, 0.1 V   35 pF max. DCR  \n1-3 = 6-8........................ 0.8 ohm max. 9-11 = 14-16 .................. 1.1 ohm max.  \nInsertion Loss  \n1-100 MHz.......................-1.2 dB max. Return Loss (@ 100 Ohms)  \n1-30 MHz...........................-16 dB min.  \n40 MHz..............................-14 dB min.  \n50 MHz..............................-13 dB min. 60-80 MHz.........................-12 dB min.  \nCross Talk  \n60 MHz..............................-40 dB min.  \n100 MHz............................-35 dB min. DCMRR  \n30 MHz..............................-43 dB min.  \n60 MHz..............................-37 dB min.  \n100 MHz............................-33 dB min. PoE Current...................... Up to 350 mAHi-Pot Test .............................1500 Vrms  \nOperating Temperature Range..................................-40 °C to +85 °C  \nStorage Temperature Range................................-25 °C to +125 °C  \nEnvironmental Specifications  \nMoisture Sensitivity Level ..................... 1  \nESD Classification (HBM) ................. N/A  \nPackaging Specifications  \nTape & Reel ....................... 600 pcs./reel  \nHow To Order  \nSM51108 P E L  \nModel   \nConstruction ~~  ~~P = Potted  \nPackaging ~~  ~~E = Tape and Reel (600 pcs./reel)  \nTermination ~~  ~~L = Tin (RoHS Compliant)  \nProduct Dimensions  \nPIN 1   \nDOT  \n1.27  \n(0.050)  \n0.46 (0.018)  \n0.70 ± 0.15 (0.028 ± 0.006)  \nElectrical Schematic  \nAsia-Pacific: Tel: +886-2 2562-4117 • Email: [asiacus@bourns.com](asiacus@bourns.com)  \nEMEA: Tel: +36 88 885 877 • Email: [eurocus@bourns.com](eurocus@bourns.com)  \nThe Americas: Tel: +1-951 781-5500 • Email: [americus@bourns.com](americus@bourns.com)[ ](americus@bourns.com)[www.bourns.com](www.bourns.com)  \n WARNING [Cancer and Reproductive Harm-](Cancer and Reproductive Harm-www.P65Warnings.ca.gov)[www.P65Warnings.ca.gov](Cancer and Reproductive Harm-www.P65Warnings.ca.gov)  \n*RoHS Directive 2015/863, Mar 31, 2015 and Annex.  \nSpecifications are subject to change without notice.  \nUsers should verify actual device performance in their specific applications.  \nThe products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at [www.bourns.com/docs/legal/disclaimer.pdf](www.bourns.com/docs/legal/disclaimer.pdf).  \nSM51108PEL LAN 10/100 Base-Tx VoIP Transformer (PoE) Modules   \nSoldering Profile  \nTemperature    \nTP  \nTL  \nTS MAX.  \nTS MIN.  \n25 °C  \n\n| tp  | |\n| --- | --- |\n| \u003Cbr>\u003Cbr>PREHEAT\u003Cbr>\u003Cbr>|  |\n\n t 25 °C TO PEAK  \n8 MINS./248 .9 °C  \nTime   \n• Ramp-up rate = 3 °C/sec. max.  \n• Ramp-down rate = 6 °C/sec. max.  \n• TL = 217 °C  \n• tL = 60-150 sec.  \n• Tp = 250 ±3 °C  \n• Time within 5 °C of actual Peak Temp (tp)2 = 20~40 sec.  \n• Ts min = 150 °C  \n• Ts max = 200 °C  \n• Ts min to Ts max = 60-180 sec. , 25 °C to Peak Temperature = 8 min. max.  \nRefer to IPC/JEDEC J-STD020D standard.  \nPackaging Specifications  \nDIMENSIONS:  MM   \n(INCHES)  \nUSER DIRECTION OF FEED  \nQUANTITY: 600 PCS. PER REEL  \nREV. 08/19  \nSpecifications are subject to change without notice.  \nUsers should verify actual device performance in their specific applications.  \nThe products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at [www.bourns.com/docs/legal/disclaimer.pdf](www.bourns.com/docs/legal/disclaimer.pdf).  \nLegal Disclaimer Notice   \nThis legal ","cbCairzo62lLaggZ","https://ap.wps.com/l/cbCairzo62lLaggZ","pdf",581313,"English","# Electrical Specifications\n## Environmental and Operating Conditions\n# Packaging and Ordering\n## How To Order\n# Product Dimensions and Soldering Profile\n## Soldering Profile\n# Legal Disclaimer Notice","[{\"question\":\"What standards and operating modes are supported by the SM51108PEL module?\",\"answer\":\"It is compliant with IEEE802.3 standards and designed for 10/100 Base-Tx operation with Power over Ethernet (PoE).\"},{\"question\":\"What key electrical performance parameters are specified?\",\"answer\":\"The document provides turns ratio, leakage inductance, capacitance, DCR, insertion loss, return loss, cross talk, and DCMRR, including limits across multiple frequency ranges.\"},{\"question\":\"Is the SM51108PEL recommended for new designs?\",\"answer\":\"No. The document states the series is currently available but not recommended for new designs, and recommends the newer model SM13126PEL.\"}]","SM51108PEL LAN 10/100 Base-Tx VoIP Transformer (PoE) Modules - Obsolete - Not recommended for new designs | PDF"]