Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
Features
Protects subscribers and equipment from
destructive power crosses and lightning
surges
Compact size fits subscriber network in-
terface devices
Reduces frequency of service calls
Increases reliability of network operation
1740 Series Coaxial Surge Protector
Characteristics
75 Ohm Powered & Unpowered Coax DC to >1 GHz
The Bourns 1740 Series of Primary Broadband Coaxial Surge Protectors is designed for Network and other high frequency
applications. The 1740 Series provides protection against surges on 75 ohm coax subscriber drops and has a fail-short
mechanism in the event of dangerous power-crosses. The protector will pass bi-directional signals over the bandwidth from
DC to in excess of 1 Ghz. Its cast-metal housing and environmentally sealed design will withstand the toughest Outside Plant
Applications.
Reduces cost of network maintenance
Listed per 497 C
Patent # 5,508,873 (U.S.);
#2,169,604 (Canada)
Product Dimensions
55.88
(2.20)
81.28
(3.20)
12.70
(.50)
19.05
(.75)
Min. Band Width/Frequency Characteristics
DC to 1.0 GHz
DC to 1.25 GHz
Connectors, Input & Output ............................................ F-Type (female) .................................. F-Type (female)
Characteristic Impedance ............................................... 75
.........................................................
75
Transmission/Insertion Loss (Max.) ................................ 0.15 dB ............................................... 0.45 dB
Return Loss (Max.) ..................................................... 20 dB .................................................. 13 dB
VSWR (Max.) ............................................................. 1:1.22 ................................................. 1:1.57
Min Fail-Short, Power Cross & Sustained
60 Hz Current Capability
1000 Vrms Open-Circuit Voltage, 25
C ..................... 30 Arms Line to Ground ..................... 15 minutes
60 Arms Line to Ground
5 seconds
120 Arms Line to Ground
5 seconds
350 Arms Line to Ground
200 mseconds
Capacitance ............................................................... 1 MHz, 1 Vrms, 0 Vdc ........................ <10 pF
Insulation Resistance ................................................. 100 V .................................................. >10
8
Operating Temperature .............................................. -40
C to 65
C (-40
F to 149
F) ...... -40
C to 65
C (-40
F to 149
F)
Storage Temperature .................................................. -55
C to 85
C (-67
F to 185
F) ...... -55
C to 85
C (-67
F to 185
F)
SURGE PROTECTION CHARACTERISTICS
IMPULSE RESET
Model
DC Breakdown
Typical Impulse
Service Life, Lightning
Service Life, AC, 60 Hz
52.5Vdc
No.
@ 100 V/Sec (Volts)
Breakdown
100 A
5 kA
20 kA
5 A
10 A
@ 260 mA 135 Vdc
@ 100 V/
s
10/1000
s
8/20
s
8/20
s
1000 Vac 1 sec 1000 Vac 1 sec
@ 200 mA
(Volts)
(Operations)
(Operations) (Operations)
(Operations)
(Operations)
(Millisec)
1740-15
150
20 %
350
>1000
>10
>1
20
10
<150
1740-23
230
20 %
450
>1000
>10
>1
20
10
<150
1740-35
350
20 %
650
>1000
>10
>1
20
10
<150
MILLIMETERS
(INCHES)
DIMENSIONS:
F TYPE CONNECTOR
3/8-32 THREAD
38.10
(1.50)
12.70
(.50)
9.40
(.37)
REV. L
UL
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
Asia-Pacific:
TEL +886- (0)2 25624117
FAX +886- (0)2 25624116
Europe:
TEL +41-41 7685555
FAX +41-41 7685510
Americas:
TEL +1-951 781-5500
FAX +1-951 781-5700
www.bourns.com
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