24

DC Line Filters VOL.10

●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.

9634DCLVOL10E1106E2

13 max.

*11max.

*12 max. with ST-104A4

2.54±0.5 3

Circuit diagram

1

2

3

4

5

6

7

8

Bottom view

3.5±1.0

Shape and Dimensions/Circuit Diagram

Noise Filters for Telephone Sets

ST-104A4, 204A Series

[RoHS Compliant]

Noise Filters for Telephone Sets

ST-104A4, 204A Series

[RoHS Compliant]

0.01

0.1

1

10

100

104A4

204A3

204A4

204A1

Frequency (MHz)

10

1

0.1

100

500

Impedance vs. Frequency

ST-104A4

0.5 to 7

3.0 (at 0.5 MHz)

50

500

0.36

–20 to +75

AM band

ST-204A1

7 to 100

0.25 (at 10 MHz)

50

500

0.10

–20 to +75

FM band

ST-204A3

7 to 40

1.0 (at 7 MHz)

50

500

0.17

–20 to +75

FM band

ST-204A4

7 to 40

0.6 (at 7 MHz) REF

50

500

0.12

–20 to +75

FM band

Frequency range

Impedance

Rated voltage

Rated current

DC resistance

Operating

Model

temperature range

Remarks

(MHz)

(k ) min.

DC (V)

(mA)

( /Line) max.

(˚C)

• Withstanding voltage: 500VDC (one minute, between lines)

• Insulation resistance: more than 10M

(250VDC, between lines)

Telephone set

Terminal

(facsimile, card reader, etc.)

Installed filter

ST-201

ST-201A

ST-202

ST-202A

ST-202S

SZ-03

ST-101

ST-101A

ST-101F2

ST-101F4

ST-110AH

ST-110AV

ST-110BH

ST-110BV

ST-104A4

ST-204A1

ST-204A3

ST-204A4

Rosette

Installed filter

Installation position

Telephone line

Line terminal unit

LFT

HFT

Installation Examples

Insertion in Driver/ Receive

circuit in telephone

Telephone

Drv.

Rec.

Installation at rosette or circuit input/output

ST, LFT, HFT

Circuit

L2

L1

Telephone

Design Examples

[mm]

DIP Type

Common Mode for Telephone Sets