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
Characteristic
Frequency Range
DC Turn-On (Breakdown)
Technology
Insertion Loss
Return Loss
VSWR
Ipeak (8/20 μs)
Maximum Power
Maximum Current
Impedance
1
Model No.
1977-09-xxx
1977-25-xxx
1977-50-xxx
90-130 V
25 W
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
400-600 V
780 W
Impedance for F-Type Connector is 75 ohms.
General Characteristics
Characteristic
Connection Method
Connectors
Grounding
Weight
Model No.
1977-09-xxx
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-A00
64.0
(2.520)
1977-xx-A01
68.0
(2.677)
25.0
(.984)
16.0
(.630)
DIA.
16.2
(.638)
25.0
(.984)
20.0
(.787)
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
51.0
(2.008)
1977-xx-A03
57.0
(2.244)
15.0
(.591)
12.0
(.472)
DIA.
10.0
(.446)
26.0
(1.161)
15.0
(.591)
19.0
(.748)
DIA.
10.0
(.446)
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.
