Tyco Electronics introduces a new line of surface

mountable RFI filters specifically designed to eliminate

noise on the signal line. These board level filters attenuate

noise on the signal line at the frequency range of 10 MHz

to 1000 MHz with maximum attenuation at 40 MHz to 400

MHz.

The U shaped ferrite features a parallel first and second leg

with a center leg surrounded by a grounding/shorting strap

and a capacitor for each line. This unique design

optimizes the filter performance by combining the elements

into one low profile single piece filter. Each filter acts on

two signal lines, but can be stacked as an array to allow

performance over multiple lines.

The BLF filter can withstand dielectric voltage of 1000 VAC

for 60 seconds, thereby allowing placement of this filter at

the optimal location, immediately behind the connector.

This placement allows immunity protection from signal line

interference as well as significant reduction of RFI

emissions. The filter can be used in conjunction with

unfiltered RJ jacks, ganged jacks, or with filtered modular

jacks for additional protection.

Surface Mountable RFI Filters

Capacitors:

Type

Monolithic ceramic chip

Standard Value:

BLF820

820pF

BLF082

82pF

Standard Tolerance:

+/-20%

Ferrites:

Type:

High resistivity, nickel zinc ceramic

Inductance:

2

µH

Housing Material:

Glass-filled polyester (UL94V-0)

Dielectric Withstanding Voltage:

Line-to-line and line-to-ground

1000 VAC for

60 seconds

Ratings:

2.2 Amps max.

56.6 Volts max.

174

Catalog 1654001

Dimensions are in inches and

Dimensions are shown for

USA Cust. Svc.: 1-800-468-2023

www.corcom.com

Revised 05-07

millimeters unless otherwise

reference purposes only.

CORCOM Prods: 1-847-680-7400

www.tycoelectronics.com

specified. Values in italics

Specifications subject

Germany:

49-89-6089-0

are metric equivalents.

to change.

BLF Series

BLF Series

CORCOM Product Guide

Specifications

Electrical Schematic

Pass Band

Minimum insertion loss in dB:

Differential mode in a 50 ohm circuit

at 1 MHz <1dB

at 5MHz < 6dB

Stop Band

Minimum insertion loss in dB:

Common mode in a 50 ohm circuit

Frequency-MHz

Model

20

40

70 100 150

300

500 700 1000

BLF082

4

10

16 20

25

40

26

23

20

BLF820

20

30

40 50

40

31

25

22

13

Part Numbers

BLF820

BLF082

UL Recognized

Dimensions

LINE

LOAD

.25

6.35

Gnd Pad

(4 places)

Recommended Pad Layout

Max.

.450

11.43

Max.

.375

9.53

Max.

.100

2.54

.100

2.54

.150

3.81

.265

6.73

Max.

.120

3.05

.050

1.27

.047

1.19

(2 places)

.047

1.19

BLF