*R oH S CO M PL IA N T Features Heavy duty design Replaceable gas tube High frequency DC-4 GHz Three grounding options DC Pass to 48 V RoHS compliant* Listed (File: E360007) VSWR <1.2 Low insertion loss <0.1 dB Bidirectional Water resistant 1977 Series High Frequency Coaxial SPD General Information The Bourns(R) 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 Model No. Characteristic 1977-09-xxx Frequency Range DC Turn-On (Breakdown) Technology Insertion Loss Return Loss VSWR Ipeak (8/20 s) Maximum Power Maximum Current Impedance 1 90-130 V 25 W 1977-25-xxx DC-4 GHz 200-300 V Gas Discharge Tube 0.2 db 20 db <1.2:1 20 kA 190 W 10 A 50 ohms 1 1977-50-xxx 400-600 V 780 W Impedance for F-Type Connector is 75 ohms. General Characteristics Model No. Characteristic 1977-09-xxx Connection Method Connectors Grounding Weight 1977-25-xxx 1977-50-xxx Series (Bidirectional) N, F M6 Screw, Bulkhead, Bracket 4.4 oz. Environmental Characteristics Characteristic Environmental Rating Operating Temperature Operating Altitude Relative Humidity Model No. 1977-09-xxx 1977-25-xxx 1977-50-xxx IP 65 -50 C to +85 C 13,000 ft. (4,000 m) Up to 5-95 % Non-condensing: Up to 100 % Asia-Pacific: 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 Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifications 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 specific applications. Applications Multi-point radio and backhaul bridges Tower Mounted Amplifiers (TMA) Antenna systems Tower Top Electronics (TTE) Transmitters and recievers WiFi Wimax broadband wireless 1977 Series High Frequency Coaxial SPD Product Dimensions 1977-xx-A01 1977-xx-A00 25.0 (.984) 64.0 (2.520) 16.0 (.630) 25.0 (.984) DIA. 16.2 (.638) 68.0 (2.677) DIA. 16.2 (.638) 26.0 (1.161) 26.0 (1.161) 13.8 (.543) MOUNTING HOLE 13.8 (.543) MOUNTING HOLE 1977-xx-A02 15.0 (.591) 20.0 (.787) 1977-xx-A03 51.0 (2.008) 12.0 (.472) 15.0 (.591) 57.0 (2.244) 19.0 (.748) DIA. 10.0 (.446) DIA. 10.0 (.446) 26.0 (1.161) 26.0 (1.161) 8.7 (.342) MOUNTING HOLE 8.7 (.342) MOUNTING HOLE DIMENSIONS: MM (INCHES) 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 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 REV. 09/13 Specifications 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 specific applications.