1740 Datasheet, PDF (1/2 Pages) Bourns Electronic Solutions – Coaxial Surge Protector

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
■ Reduces cost of network maintenance
■ U® L 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 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.
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)
Model
No.
1740-15
1740-23
1740-35
DC Breakdown
@ 100 V/Sec (Volts)
150 ±20 %
230 ±20 %
350 ±20 %
SURGE PROTECTION CHARACTERISTICS
Typical Impulse
Breakdown
@ 100 V/µs
(Volts)
350
450
650
Service Life, Lightning
Service Life, AC, 60 Hz
100 A
10/1000 µs
(Operations)
5 kA
20 kA
5A
10 A
8/20 µs
8/20 µs
1000 Vac 1 sec 1000 Vac 1 sec
(Operations) (Operations) (Operations) (Operations)
>1000
>10
>1
20
10
>1000
>10
>1
20
10
>1000
>10
>1
20
10
IMPULSE RESET
52.5Vdc
@ 260 mA 135 Vdc
@ 200 mA
(Millisec)
<150
<150
<150
Product Dimensions
81.28
(3.20)
55.88
(2.20)
12.70
(.50)
DIMENSIONS:
MILLIMETERS
(INCHES)
12.70
(.50)
19.05
(.75)
38.10
9.40
(1.50)
(.37)
F TYPE CONNECTOR
3/8-32 THREAD
REV. L
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.