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Features
Applications
■ Optimized for extended reach
■ Twisted pair coax conversion
■ Fast and easy installation
■
■ Service interoperability and compatibility
■ Triple Play
with most existing NIDs
HPNA
■ xDSL service extension on COAX
■ UL Listed per 1863
■ RoHS compliant*
3670 Series Balance-Unbalance Adapter
Bourns® Model 3670-01 is a high quality impedance matching unit optimized to extend reach/reduce loss on ADSL2+ and VDSL2
circuits where conversion from twisted pair to existing coaxial cabling is required. The 3670-01 is configured with flying leads for
connection of the twisted pair circuit so no new wires are required. Dual mounting flanges provide flexibility in installation.
Characteristics
Twisted Wire Port Impedance.................................................................................................................. 100 Ω
Coax Port Impedance .............................................................................................................................. 75 Ω
Withstanding Voltage ............................................................................................................................... DC 330 V, 2 sec. (Ico=10 mA)
Insulation Resistance .............................................................................................................................. >10 MΩ (DC 250 V)
Insertion Loss (typical)............................................................................................................................. 0.55 dB @ 25 kHz
0.13 dB @ 138 kHz
0.22 dB @ 3.75 MHz
0.28 dB @ 5.8 MHz
0.35 dB @ 8.5 MHz
Return Loss (Typical ................................................................................................................................ 7.83 dB @ 25 kHz
21.47 dB @ 138 kHz
29.49 dB @ 3.75 MHz
32.13 dB @ 5.8 MHz
31.92 dB @ 8.5 MHz
Insertion Loss
0
COAXIAL
75 OHM
VM
3670-01
50 OHM – 100 OHM
Attenuation (dB)
-0.5
TWIST WIRE
50 OHM
-1
-1.5
-2
-2.5
10k
100k
1M
10M
30M
Frequency (Hz)
Return Loss
50
100
OHM
45
COAXIAL
3670-01
TEST
EQUIPMENT
75
OHM
RETURN LOSS
REFERENCE
IMPEDANCE
40
Attenuation (dB)
TWIST WIRE
35
30
25
20
15
10
5
0
10k
100k
1M
10M
30M
Frequency (Hz)
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
3670 Series Balance-Unbalance Adapter
Product Dimensions
Installation Diagram
Wiring Schematic for BALUN:
The BALUN is intended to be used in a UL listed NID enclosure
Circuit shows BALUN connected to “DATA” port of the splitter.
155 OR 455
PROTECTOR
VOICE
FROM C.O.
DATA
SPLITTER
22.78
(0.8970)
85122
58.42
(2.3000)
COAXIAL
18.42
(0.7250)
BALUN
PRODUCT LABEL
POTS
TO “DIPLEXER” AND/OR
“SET TOP BOX”
How to Order
DIMENSIONS:
MM
(INCHES)
Stud Mount .......................Part No. 3670-01, 50 units per carton
Asia-Pacific: Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA: Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas: Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
REV. B 10/19
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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