{"product_id":"motorola-is-b50ln","title":"Motorola IS-B50LN Bulkhead Coaxial RF Surge Protector (10MHz-1GHz)","description":"\u003ch2\u003ePolyPhaser IS-B50LN Coaxial RF Surge Protectors\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003ePolyPhaser IS-B50LN-C2 and IS-B50LN-C2-ME\u003c\/strong\u003e are bulkhead-mount coaxial RF surge protectors for fixed radio installations. The corresponding \u003cstrong\u003eMotorola part numbers are DSISB50LNC2 and DQISB50LNC2ME\u003c\/strong\u003e. Choose the connector configuration that matches your antenna feedline and equipment connections.\u003c\/p\u003e\n\u003cp\u003ePolyPhaser is the manufacturer. The Motorola references identify the corresponding ordering options, not a different manufacturer. These protectors are intended to be part of a properly designed grounding and surge-protection system; they do not guarantee protection against every lightning event.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo Type-N configurations:\u003c\/strong\u003e N-female to N-female or N-female to N-male.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroadband RF application:\u003c\/strong\u003e Listed operating range of 10 MHz–1 GHz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC-blocking design:\u003c\/strong\u003e A series blocking capacitor prevents DC continuity through the RF center-conductor path. Confirm suitability before using with equipment that requires DC over coax.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulkhead mounting:\u003c\/strong\u003e Intended for installation as part of a grounded coaxial entry arrangement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVariant and Part-Number Cross-Reference\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eAttribute\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eN-Female to N-Female\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eN-Female to N-Male\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003ePolyPhaser\u003c\/td\u003e\n\u003ctd\u003ePolyPhaser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer part number\u003c\/td\u003e\n\u003ctd\u003eIS-B50LN-C2\u003c\/td\u003e\n\u003ctd\u003eIS-B50LN-C2-ME\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotorola part number\u003c\/td\u003e\n\u003ctd\u003eDSISB50LNC2\u003c\/td\u003e\n\u003ctd\u003eDQISB50LNC2ME\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntenna \/ surge-side connector\u003c\/td\u003e\n\u003ctd\u003eType-N female\u003c\/td\u003e\n\u003ctd\u003eType-N female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEquipment \/ protected-side connector\u003c\/td\u003e\n\u003ctd\u003eType-N female\u003c\/td\u003e\n\u003ctd\u003eType-N male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection arrangement\u003c\/td\u003e\n\u003ctd\u003eCoaxial cables connect on both sides.\u003c\/td\u003e\n\u003ctd\u003eMale equipment-side connector can mate with a suitable N-female port, subject to clearance and installation requirements.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003eThe following technical values are retained from the existing listing. Confirm the current PolyPhaser documentation for the selected part before engineering an installation, particularly power limits, environmental ratings and grounding requirements.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eAttribute\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eListed Details\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003ePolyPhaser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eIS-B50LN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eBulkhead-mount coaxial RF surge protector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency range\u003c\/td\u003e\n\u003ctd\u003e10–1,000 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal impedance\u003c\/td\u003e\n\u003ctd\u003e50 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge current capacity\u003c\/td\u003e\n\u003ctd\u003e20 kA, 8\/20 µs waveform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThroughput energy\u003c\/td\u003e\n\u003ctd\u003e≤120 µJ, listed typical value\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsertion loss\u003c\/td\u003e\n\u003ctd\u003e≤0.1 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVSWR \/ return loss\u003c\/td\u003e\n\u003ctd\u003e≤1.1:1 \/ ≥26 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListed continuous RF power limits\u003c\/td\u003e\n\u003ctd\u003e1.5 kW at 10–50 MHz; 375 W at 50–220 MHz; 125 W at 220–700 MHz; 50 W at 700–1,000 MHz. Confirm the applicable rating at band boundaries.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection technology\u003c\/td\u003e\n\u003ctd\u003eGas discharge tube with series DC-blocking capacitor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eBulkhead; listed 5\/8-24 threaded barrel with nut and washer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrounding provisions\u003c\/td\u003e\n\u003ctd\u003eBulkhead-panel connection and listed 10-32 ground screw; follow the manufacturer's installation instructions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListed ingress rating\u003c\/td\u003e\n\u003ctd\u003eIP67; verify the selected part and installed connector-sealing requirements.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListed operating temperature\u003c\/td\u003e\n\u003ctd\u003e-58°F to +122°F (-50°C to +50°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExisting standards references requiring confirmation\u003c\/td\u003e\n\u003ctd\u003eIEC 61000-4-5, IEC 60529, UL 497E, IEEE C62.41, CE and RoHS. These references are not independent verification of certification for either variant.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLegacy reference\u003c\/td\u003e\n\u003ctd\u003eRRX4025A appears in the previous listing. Confirm suitability before treating it as an interchangeable replacement.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eApplication and Installation Compatibility\u003c\/h3\u003e\n\u003cp\u003eSelection depends on frequency, RF power, impedance, connector gender, mounting clearance and grounding design, not simply the radio brand. No universal repeater or base-station fitment is claimed.\u003c\/p\u003e\n\u003cp\u003eFollow the unit's antenna\/surge-side and equipment\/protected-side markings. Have the grounding, bonding and connector weatherproofing assessed for the installation. A matching connector alone does not establish a complete or effective surge-protection installation.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eStatus\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoaxial surge protector\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eOne unit in the selected connector configuration.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting hardware\u003c\/td\u003e\n\u003ctd\u003eListed with product\u003c\/td\u003e\n\u003ctd\u003eNut and washer are referenced in the existing mounting specifications; confirm package contents if required for your installation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoaxial cables, adapters and grounding materials\u003c\/td\u003e\n\u003ctd\u003eNot specified as included\u003c\/td\u003e\n\u003ctd\u003eConfirm the additional materials required for the site.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eRelated Installation and Radio Accessories\u003c\/h3\u003e\n\u003cp\u003eThese are separate accessories for their respective applications, not a matched installation kit or confirmed connections to this protector.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/purchase-radios-fm2\" title=\"Purchase Radios FM2 antenna mounting hardware\"\u003ePurchase Radios FM2 Antenna Mounting Kit\u003c\/a\u003e\u003c\/strong\u003e: Mounting hardware for a suitable antenna installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurchase Radios NMO-RG58-17-NC NMO Mount\u003c\/strong\u003e: A separate NMO mount and cable assembly. Do not assume its unterminated cable connects directly to this Type-N protector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/motorola-rmn5068\" title=\"Motorola RMN5068A desktop microphone\"\u003eMotorola RMN5068A Desktop Microphone\u003c\/a\u003e\u003c\/strong\u003e: For compatible radio control-station applications; not part of the RF surge-protection path.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/motorola-pmln6404b\" title=\"Motorola PMLN6404B remote-mount adapter kit\"\u003eMotorola PMLN6404B Remote-Mount Adapter Kit\u003c\/a\u003e\u003c\/strong\u003e: For supported mobile-radio remote-mount configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/motorola-pman5101\" title=\"Motorola PMAN5101A antenna\"\u003eMotorola PMAN5101A Wi-Fi Antenna\u003c\/a\u003e\u003c\/strong\u003e: A separate radio accessory, not a confirmed antenna pairing for this protector's listed frequency range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWho manufactures these surge protectors?\u003c\/h4\u003e\n\u003cp\u003ePolyPhaser manufactures the IS-B50LN-C2 and IS-B50LN-C2-ME. The corresponding Motorola ordering references are DSISB50LNC2 and DQISB50LNC2ME, respectively.\u003c\/p\u003e\n\u003ch4\u003eWhat is the difference between the two variants?\u003c\/h4\u003e\n\u003cp\u003eIS-B50LN-C2 \/ DSISB50LNC2 has N-female connectors on both sides. IS-B50LN-C2-ME \/ DQISB50LNC2ME has an N-female antenna-side connector and an N-male equipment-side connector. Confirm all technical requirements for the chosen variant.\u003c\/p\u003e\n\u003ch4\u003eAre the PolyPhaser part numbers discontinued or replacement numbers?\u003c\/h4\u003e\n\u003cp\u003eIS-B50LN-C2 and IS-B50LN-C2-ME identify the manufacturer models in this listing. They should not be treated as discontinued part numbers simply because Motorola ordering references are also provided.\u003c\/p\u003e\n\u003ch4\u003eWhat does DC block mean?\u003c\/h4\u003e\n\u003cp\u003eThe series capacitor blocks DC continuity in the RF center-conductor path. It is not a DC-pass connection for powering equipment through the coax. Confirm whether your antenna system requires DC continuity.\u003c\/p\u003e\n\u003ch4\u003eCan it be used with a 50 W or 100 W repeater?\u003c\/h4\u003e\n\u003cp\u003eCheck the operating frequency and the selected part's power rating. The existing listing specifies only 50 W for 700–1,000 MHz, so a blanket 100 W suitability claim would be inappropriate. Use the manufacturer's current frequency-dependent limits.\u003c\/p\u003e\n\u003ch4\u003eWhich side connects to the antenna?\u003c\/h4\u003e\n\u003cp\u003eFollow the protector's markings: the surge side faces the antenna feedline, and the protected side faces the equipment. Do not select orientation by connector gender alone.\u003c\/p\u003e\n\u003ch4\u003eDoes it eliminate the need for grounding or weatherproofing?\u003c\/h4\u003e\n\u003cp\u003eNo. Grounding, bonding and appropriate connector sealing remain part of the installation. Follow the manufacturer's instructions rather than relying on a generic ground-wire size or an enclosure rating alone.\u003c\/p\u003e\n\u003ch4\u003eDoes it guarantee protection from a direct lightning strike?\u003c\/h4\u003e\n\u003cp\u003eNo guarantee of protection against every lightning event is made. A coaxial protector is one component of the site's overall protection system.\u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e1-year manufacturer's warranty.\u003c\/p\u003e\n\u003ch3\u003eMore Resources\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/blogs\/news\/mobile-radios-essential-accessories\" title=\"Essential Accessories for Vehicle and Base Station Mobile Radios\"\u003eEssential Accessories for Vehicle \u0026amp; Base Station Mobile Radios\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/blogs\/news\/two-way-radio-maintenance-tips\" title=\"5 Essential Two-Way Radio Maintenance Tips\"\u003e5 Essential Two-Way Radio Maintenance Tips\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/blogs\/news\/how-to-use-two-way-radio-step-by-step-guide\" title=\"How to Use a Two-Way Radio: Step-by-Step Guide for Beginners\"\u003eHow to Use a Two-Way Radio: Step-by-Step Guide for Beginners\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/collections\/two-way-radio-cables\" title=\"All Two-Way Radio Cables\"\u003eTwo-Way Radio Cables\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/collections\/two-way-radio-antennas-for-portables-mobiles-and-bases\" title=\"All Two-Way Radio Antennas for Portables, Mobiles and Bases\"\u003eTwo-Way Radio Antennas\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/collections\/motorola\" title=\"Motorola Two-Way Radios and Accessories\"\u003eMotorola Two-Way Radios \u0026amp; Accessories\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Motorola","offers":[{"title":"IS-B50LN-C2 (N-F to N-F)","offer_id":67996895346862,"sku":"DSISB50LNC2","price":114.99,"currency_code":"USD","in_stock":true},{"title":"IS-B50LN-C2-ME (N-F to N-M)","offer_id":67996895379630,"sku":"DQISB50LNC2ME","price":114.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0062\/0845\/4744\/files\/DSISB50LNC2.png?v=1794254412","url":"https:\/\/www.atlanticradiocorp.com\/products\/motorola-is-b50ln","provider":"Atlantic Radio Communications Corp. ","version":"1.0","type":"link"}