BLM18

Chip Ferrite Bead

The BLM18 is a chip ferrite bead from Murata Electronics. View the full BLM18 datasheet below including key specifications.

Manufacturer

Murata Electronics

Key Specifications

Parameter	Value
Current Rating (Max)	700mA
Current Rating (Max)	700mA
DC Resistance (DCR) (Max)	250mOhm
DC Resistance (DCR) (Max)	250mOhm
Height (Max)	0.037" (0.95mm)
Height (Max)	0.037" (0.95mm)
Impedance @ Frequency	220 Ohms @ 100 MHz
Impedance @ Frequency	220 Ohms @ 100 MHz
Mounting Type	Surface Mount
Number of Lines	1
Number of Lines	1
Operating Temperature	-55°C ~ 125°C
Package / Case	0603 (1608 Metric)
Packaging	MouseReel
Size / Dimension	0.063" L x 0.031" W (1.60mm x 0.80mm)
Size / Dimension	0.063" L x 0.031" W (1.60mm x 0.80mm)
Standard Pack Qty	4000

Overview

Part: BLM18 Series — MURATA Type: Chip Ferrite Bead Description: A series of chip ferrite beads designed for noise suppression in digital interface, DC power line, and high-speed signal line applications, offering a wide range of impedance values and rated currents.

Operating Conditions:

Operating temperature: -55°C to +125°C
Storage temperature: -55°C to +125°C

Absolute Maximum Ratings:

Max junction/storage temperature: +125°C

Key Specs:

Impedance range (at 100MHz): 5 Ω to 2200 Ω (±25% or min. tolerance)
Rated Current (at 85°C): 100 mA to 8000 mA (depending on part number)
Rated Current (at 125°C): 100 mA to 5000 mA (depending on part number)
DC Resistance (initial values): 0.004 Ω to 1.5 Ω max. (depending on part number)
Impedance Change (after testing): Within ±30% (or ±50% for BLM18SN, -10% to +50% for BLM18KG)
Unit Mass (Typical): 0.005g (BLM18SN1*), 0.004g (BLM18TN1*)

Features:

Designed for digital interface, DC power line, and high-speed signal line applications
Wide range of impedance values available
High rated current options for power lines
Available in standard and thin types

Applications:

Digital Interface
DC power line
High speed signal line
General use

Package:

Chip Ferrite Bead

Applications

Please contact us before using our products for the applications listed below which require especially high reliability for the prevention of defects which might directly cause damage to the third party's life, body or property.

(1) Aircraft equipment (6) Disaster prevention / crime prevention equipment
(2) Aerospace equipment (7) Traffic signal equipment
(3) Undersea equipment (8) Transportation equipment (vehicles,trains,ships,etc.)
(4) Power plant control equipment (9) Data-processing equipment
(5) Medical equipment (10) Applications of similar complexity and /or reliability requirements to the applications listed in the above

Package Information

Standard land dimensions
< For BLM18 series (except BLM18P/BLM18S/BLM18K type) >

Chip Ferrite Bead

< For BLM18P/BLM18S/BLM18K type >

< For BLM18P/BLM18S/BLM18K type >

Type	Soldering	a	b	c
BLM18 (except18P/18S/ BLM18K type)	Flow Reflow	0.7	2.2 to 2.6 1.8 to 2.0	0.7

Type	Rated Current	a	b	c	Land pad thickness and dimension d	Land pad thickness and dimension d	Land pad thickness and dimension d
	(A)				18μm	35μm	70μm
BLM18P BLM18S BLM18K	0.5 to 1.5	0.7	Flow 2.2 to 2.6 Reflow 1.8 to 2.0	0.7	0.7	0.7	0.7
BLM18P BLM18S BLM18K	1.7 to 2.5	0.7	Flow 2.2 to 2.6 Reflow 1.8 to 2.0	0.7	1.2	0.7	0.7
BLM18P BLM18S BLM18K	3 to 4	0.7	Flow 2.2 to 2.6 Reflow 1.8 to 2.0	0.7	2.4	1.2	0.7
BLM18P BLM18S BLM18K	5 to 6	0.7	Flow 2.2 to 2.6 Reflow 1.8 to 2.0	0.7	6.4	3.3	1.65
BLM18SN	8	0.7	2.0	0.7	-	6.4	3.3

(in mm)

∗ The excessive heat by land pads may cause deterioration at joint of products with substrate.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
BLM18AG221SN1D	Murata Electronics	0603 (1608 Metric)

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