BLF Series

Surface Mountable RFI Filters

UL Recognized

Catalog Data Sheet

BLF Series

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.

Electrical Schematic

Dimensions

Specifications

Capacitors:
	Type:	Monolithic ceramic chip
	Values:
	BLF820	820pF
	BLF082	82pF

Ferrites:
	Type:	High resistivity, nickel zinc ceramic
	Inductance:	2 µH

Housing Material:		Glass-filled polyester (UL94V-0)

Dielectric Withstanding Voltage:		100 VAC for 60 seconds
	Line to line and line to ground

Rated Voltage:		56.6 Volts max

Rated Current:		2.2 Amps max

Pass Band Minimum insertion loss in dB:
Differential mode in a 50 ohm circuit :
at 1MHz < 1dB
at 5MHz < 6dB

Stop Band Minimum insertion loss in dB:
Common mode in a 50 ohm circuit
Model	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

Click on any part number for distributor stock status and eCommerce Links. For more information refer to the Corcom Part Numbering System reference.

BLF082

BLF820

USA Customer Service:	1-800-468-2023
Corcom Products Direct:	1-847-680-7400
Germany:	49-89-6089-0

Dimensions are in inches and millimeters unless otherwise specified. Values in italics are metric equivalents. Dimensions are shown for reference purposes only. Specifications subject to change.