features heavy duty design high frequency dc-4 ghz dc pass to ?8 v vswr <1.2 low insertion loss <0.1 db bidirectional water resistant replaceable gas tube three grounding options rohs compliant* listed (file: e360007) 1977 series high frequency coaxial spd *rohs directive 2002/95/ec jan. 27, 2003 including annex and rohs recast 2011/65/eu june 8, 2011. speci cations are subject to change without notice. the device characteristics and parameters in this data sheet can and do vary in different applications and actual device perfor mance may vary over time. users should verify actual device performance in their speci c applications. the bourns ? model 1977 series coaxial surge protective device (spd) has been designed to provide heavy duty protection for antennas, broadband, microwave, gps, cellular and catv applications against surges caused by lightning and other electrical transients. electrical characteristics general characteristics environmental characteristics characteristic model no. 1977-09-xxx 1977-25-xxx 1977-50-xxx frequency range dc-4 ghz dc turn-on (breakdown) 90-130 v 200-300 v 400-600 v technology gas discharge tube insertion loss 0.2 db return loss 20 db vswr <1.2:1 ipeak (8/20 s) 20 ka maximum power 25 w 190 w 780 w maximum current 10 a impedance 50 ohms 1 characteristic model no. 1977-09-xxx 1977-25-xxx 1977-50-xxx connection method series (bidirectional) connectors n, f grounding m6 screw, bulkhead, bracket weight 4.4 oz. characteristic model no. 1977-09-xxx 1977-25-xxx 1977-50-xxx environmental rating ip 65 operating temperature -50 c to +85 c operating altitude 13,000 ft. (4,000 m) relative humidity up to 5-95 % non-condensing: up to 100 % general information 1 impedance for f-type connector is 75 ohms. asia-paci c: tel: +886-2 2562-4117 ?fax: +886-2 2562-4116 europe: tel: +41-41 768 5555 ?fax: +41-41 768 5510 the americas: tel: +1-951 781-5500 ?fax: +1-951 781-5700 www.bourns.com *rohs compliant
speci cations are subject to change without notice. the device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. users should verify actual device performance in their speci c applications. 1977 series high frequency coaxial spd product dimensions dimensions: mm (inches) rev. 09/13 how to order 1977 - xx - xxx series dc turn-on 09 = 90-130 v 25 = 200-300 v 50 = 400-600 v connector type a00 = n-type female/female a01 = n-type male/female a02 = f-type female/female a03 = f-type male/female applications multi-point radio and backhaul bridges tower mounted ampli ers (tma) antenna systems tower top electronics (tte) transmitters and recievers wifi wimax broadband wireless 26.0 (1.161) dia. 16.2 (.638) 25.0 (.984) 64.0 (2.520) 16.0 (.630) 13.8 (.543) mounting hole 1977-xx-a00 26.0 (1.161) dia. 10.0 (.446) 15.0 (.591) 51.0 (2.008) 12.0 (.472) 8.7 (.342) mounting hole 26.0 (1.161) dia. 16.2 (.638) 25.0 (.984) 68.0 (2.677) 20.0 (.787) 13.8 (.543) mounting hole 26.0 (1.161) dia. 10.0 (.446) 15.0 (.591) 57.0 (2.244) 19.0 (.748) 8.7 (.342) mounting hole 1977-xx-a02 1977-xx-a01 1977-xx-a03 examples: 1977-09-a00 .......................................coax, dc to 4 ghz, n, ff, 25 w 1977-09-a01 ...................................... coax, dc to 4 ghz, n, mf, 25 w 1977-09-a02 ........................................coax, dc to 4 ghz, f, ff, 25 w 1977-09-a03 .......................................coax, dc to 4 ghz, f, mf, 25 w 1977-25-a00 .....................................coax, dc to 4 ghz, n, ff, 190 w 1977-25-a01 .................................... coax, dc to 4 ghz, n, mf, 190 w 1977-25-a02 ......................................coax, dc to 4 ghz, f, ff, 190 w 1977-25-a03 .....................................coax, dc to 4 ghz, f, mf, 190 w 1977-50-a00 .....................................coax, dc to 4 ghz, n, ff, 780 w 1977-50-a01 .................................... coax, dc to 4 ghz, n, mf, 780 w 1977-50-A02 ......................................coax, dc to 4 ghz, f, ff, 780 w 1977-50-a03 .....................................coax, dc to 4 ghz, f, mf, 780 w
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