1740 xx(Coax)revH

Features
■ Protects subscribers and equipment from
■ Reduces cost of network maintenance
destructive power crosses and lightning
surges
■ Compact size fits subscriber network
interface devices
■ Reduces frequency of service calls
■ Increases reliability of network operation
■
Listed per 497 C
■ Patent # 5,508,873 (U.S.);
#2,169,604 (Canada)
1740 Series – Coaxial Surge Protector
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 bidirectional 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.
Characteristics
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 Ω..................................................... 75 Ω
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 ................................................... >108 Ω
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)
IMPULSE
RESET
SURGE PROTECTION CHARACTERISTICS
Model
No.
1740-15
1740-23
1740-35
DC Breakdown
@ 100 V/Sec
(Volts)
Service Life, Lightning
Service Life, AC, 60 Hz
Typical Impulse
Breakdown
100 A
5 kA
20 kA
5A
10 A
@ 100 V/μs
10/1000 μs
8/20 μs
8/20 μs
1000 Vac 1 sec 1000 Vac 1 sec
(Volts)
(Operations) (Operations) (Operations)
(Operations)
(Operations)
150 ±20 %
230 ±20 %
350 ±20 %
350
450
650
>1000
>1000
>1000
>10
>10
>10
>1
>1
>1
20
20
20
10
10
10
52.5 Vdc
@ 260 mA
135 Vdc
@ 200 mA
(Millisec)
<150
<150
<150
Product Dimensions
81.28
(3.20)
55.88
(2.20)
F TYPE CONNECTOR
3/8-32 THREAD
12.70
(.50)
12.70
(.50)
38.10
(1.50)
9.40
(.37)
19.05
(.75)
DIMENSIONS:
MM
(INCHES)
REV. M 04/15
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.
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