20

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

bST-101, 201

18 max.

ø0.32

11 max.

bST-202

16 max.

ø0.4

9.0 max.

bST-202S

13 max.

ø0.32

7.0 max.

Circuit diagram

Shape and Dimensions/Circuit Diagram

Noise Filters for Telephone Sets

ST-101, 201, 202, 202S

[RoHS Compliant]

ST-101

0.5 to 7

3

(at 0.5 MHz)

50

200

180

–20 to +75

AM band

ST-201

7 to 40

1.5 (at 7 MHz)

50

200

100

–20 to +75

FM band

ST-202

7 to 100

0.6 (at 100 MHz)

50

1000

40

–20 to +75

FM band

ST-202S

7 to 100

0.6 (at 100 MHz)

50

1000

35

–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)

(m /Line) max.

(˚C)

Noise Filters for Telephone Sets

ST-101, 201, 202, 202S

[RoHS Compliant]

0.01

0.1

1

10

100

201

202

202S

101

Frequency (MHz)

0.1

1

10

100

500

Impedance vs. Frequency

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

• Insulation resistance: more than10M

(250VDC, between lines)

• Recommended soldering conditions: 350±10˚C, 2 to 3 sec.

[mm]

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

DIP Type

Common Mode for Telephone Sets