DIP Type
Common Mode for Telephone Sets
Noise Filters for Telephone Sets
ST-101A, 201A, 202A
[RoHS Compliant]
[RoHS Compliant]
Frequency range
(MHz)
Model
ST-101A
ST-201A
ST-202A
Impedance
(k⏲) min.
Rated current
(mA)
DC resistance
(m⏲/Line) max.
3 (at 0.5 MHz)
1.5 (at 7 MHz)
0.6 (at 100 MHz)
0.5 to 7
7 to 40
7 to 100
Rated voltage
DC (V)
50
50
50
200
200
1000
250
150
50
• Withstanding voltage: 500VDC (one minute, between lines)
Operating
temperature range
(˚C)
–20 to +65
–20 to +65
–20 to +65
Remarks
AM band
FM band
FM band
• Insulation resistance: more than10M⏲ (100VDC, between lines)
Shape and Dimensions/Circuit Diagram
16 max.
10.5 max.
Circuit diagram
ø0.7
ᕃ
ᕄ
ᕃ
7.62±0.5
ᕆ
ᕃ
ᕅ
4.0 ± 0.5 20 max.
ᕄ
ᕆ
5.08±0.5
[mm]
Installation Examples
Design Examples
Installation position
Telephone set
Rosette
ᕃInstallation at rosette or circuit input/output
Terminal
(facsimile, card reader, etc.)
Telephone line
Telephone
ST, LFT, HFT
Installed filter
ST-201 ST-101
ST-201A ST-101A
ST-202 ST-101F2
ST-202A ST-101F4
ST-202S ST-110AH
SZ-03
ST-110AV
ST-110BH
ST-110BV
ST-104A4
ST-204A1
ST-204A3
ST-204A4
ᕄInsertion in Driver/ Receive
circuit in telephone
Line terminal unit
L1
Installed filter LFT
HFT
Drv.
Circuit
L2
Telephone
Rec.
Impedance vs. Frequency
Impedance (k⏲)
100
101A
10
1
201A
202A
0.1
0.01
0.1
1
10
100
500
Frequency (MHz)
DC Line Filters VOL.08
●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2008.03.06 P0913MCDF10VOL08E
