Keyword Research

Enter a product part number, or a portion of a part number.

Select your region & language

Please be sure to read these general terms of use, before using this product.

Cautions about imitations

BLA31AG221SN4#
“#” at the end indicates the package specification code.

< List of part numbers with package codes >: BLA31AG221SN4B BLA31AG221SN4D BLA31AG221SN4J

Applications

Unsuitable Applications	Please be sure to read and comply with these "Precautions for use."
Specific Applications	Consumer equipment,Medical equipment [GHTF A/B/C] except for implant & surgery & auto injector,Industrial equipment except for transportation & facility & energy equipment Please refer to Our Website and specifications, etc. for information about the performance, functions, quality, management, and safety required for the above applications, and use Products after confirming the performance and reliability of the actual Product.
Recommended Applications	Consumer equipment

Unsuitable Applications

Please be sure to read and comply with these "Precautions for use."

Specific Applications

Consumer equipment,Medical equipment [GHTF A/B/C] except for implant & surgery & auto injector,Industrial equipment except for transportation & facility & energy equipment

Please refer to Our Website and specifications, etc. for information about the performance, functions, quality, management, and safety required for the above applications, and use Products after confirming the performance and reliability of the actual Product.

Recommended Applications

Consumer equipment

Appearance & Shape

Specifications

Shape	SMD
Size Code (in inch)	1206
Length	3.2mm
Length　Tolerance	±0.2mm
Width	1.6mm
Width Tolerance	±0.2mm
Thickness	0.8mm
Thickness　Tolerance	±0.2mm
Operating Temperature Range	-55℃ to 125℃
Mass(typ.)	0.018g
Number of Circuit	4
Rated Current (at 85℃)	150mA
Rated Current (at 125℃)	150mA
DC Resistance(max.)	0.25Ω
Impedance (at 100MHz)	220Ω
Impedance (at 100MHz) Tolerance	±25%
Size Code (in mm)	3216

Features

The miniaturization of electronic equipment requires
high performance EMI filters which enable high density
mounting. BLA31A/B series consists of 4 circuits of
ferrite beads.
BLA31A/B is suitable for EMI suppression in smaller
digital equipment.

Features
1. BLA31A/B has 4 circuits in 3.2x1.6mm body with
    0.8mm pitch.
2. Provides attenuation across a broad frequency range.
    Two types of impedance are available which meet
    general signal line and high speed signal line.
3. Original inner electrode structure enables extra
    low crosstalk.
4. The nickel barrier structure of the external
    electrodes provides excellent solder heat
    resistance. Both flow and reflow soldering methods
    can be employed.

Packaging Information

Packaging	Specifications	Standard Packing Quantity
B	Bulk(Bag)	1000
D	180mm Paper Tape	4000
J	330mm Paper Tape	10000

Product Data

Impedance-Frequency Characteristics

Equivalent Circuit

Request Samples (form)

Request a Quote

Request Technical Support

10pcs free sample request

Stock Check (Where to buy)

Download a PDF file of this page

How to read part numbers

Details

Specifications Sheet(with cautions/mounting/packaging)

Library

Related Video

How to Use SimSurfing
Noise Filter Design Support Tool

Related FAQs

Noise Suppression Products / EMI Suppression Filters / ESD Protection Devices FAQ

Can be used up to 150℃ max.
* There are icons of plural temperature.

RoHS Directive compliant product

This product contain no restricted substances specified by RoHS Directive with more than maximum concentration value by weight in homogeneous material, except for cases falling under RoHS exemptions.

Restricted substances	Maximum concentration value
Lead	0.1%
Mercury	0.1%
Cadmium	0.01%
Hexavalent chromium	0.1%
Polybrominated biphenyls (PBB)	0.1%
Polybrominated diphenyl ethers (PBDE)	0.1%
Bis (2-ethylhexyl) phthalate (DEHP)	0.1%
Butyl benzyl phthalate (BBP)	0.1%
Dibutyl phthalate (DBP)	0.1%
Diisobutyl phthalate (DIBP)	0.1%

REACH Regulation compliant product:
The Product complies to provisions of REGULATION (EC) No 1907/2006 (Reach).

Restriction of the substances contained in the article under Reach:
REACH regulation impose restrictions of product applications and substance ban on the basis of Article 67.1.
The inclusion of a Substance of Very High Concern (SVHC) in the Candidate List creates the duty to communicate information on substances in articles to allow safe use of the article, which is applicable to suppliers in Europe (Reach Article 33). It does not impose any restrictions on the use of the products, nor is it a substance ban. Please check "Murata products containing SVHC and Information on safe use" .

AEC-Q200 compliant product

Products that acquired safety standard certification IEC60384-14.
Safety Standard Certification

Products that are based on the electrical appliance and material safety law of Japan.

Product of 10 to 40kV rated voltage

Low dissipation for high frequency
By devising ceramic materials and electrode materials, low dissipation is achieved in frequency bands of VHF, UHF and microwave or beyond.

Low inductance
This capacitor is designed so that the parasitic inductance component (ESL) that the capacitor has on the high frequency side becomes lower.

Product suitable for acoustic noise reduction and low distortion
This product suppresses acoustic noise, which occurs when a ceramic capacitor is used, by devising the materials and configuration.

Product resistant to deflection cracking
This capacitor is designed to prevent failures as much as possible by short mode caused by cracking when there is board deflection.

Product with solder cracking suppression
“This capacitor is configured with metal terminals and leads connected to the chip. The metal terminals and leads relieve the stress from expansion and contraction of the solder, to suppress solder cracking.”

No DC bias characteristics
Polymer capacitor is no capacitance change with DC bias due to aluminum oxidized film for dielectric.

By making full use of the water repellence of the capacitor surfaces, this product minimizes Ion migration from the external electrodes (Terminations) that results from condensation.

Low-inductance product suitable for noise suppression.
This product has extremely low ESL and is suitable for suppression of noise, including high frequencies.
Contributes to noise suppression as an EMI filter

Product for reflow soldering

Product for flow soldering

Limited to Conductive Glue Mounting
Since silver palladium is used for the external electrodes,the capacitor can be mounted by conductive adhesive.

Product for bonding
Since gold is used for the external electrodes, the capacitor can be mounted by die bonding/wire bonding.

Product for welding
Capacitor configured with lead electrodes and can be mounted by welding. Please contact us about the lead wire material.

Product dedicated for screw fixing

AEC-Q200 compliant product (* Deviation may be submitted. Please contact us for details.)

Can be used up to 155oC Max.
* There are icons of plural temperature.

Restricted substances	Maximum concentration value
Lead	0.1%
Mercury	0.1%
Cadmium	0.01%
Hexavalent chromium	0.1%
Polybrominated biphenyls (PBB)	0.1%
Polybrominated diphenyl ethers (PBDE)	0.1%
Bis (2-ethylhexyl) phthalate (DEHP)	0.1%
Butyl benzyl phthalate (BBP)	0.1%
Dibutyl phthalate (DBP)	0.1%
Diisobutyl phthalate (DIBP)	0.1%

Wound structure inductor which has ferrite material core.
→Detailed explanation

Wound structure inductor.
The use of magnetic iron powder ensure capability for large current.
→Detailed explanation

Wound structure inductor.
Using non-magnetic core like alumina material, shows high performance in high frequency range.
→Detailed explanation

Inductor of the film structure.
→Detailed explanation

Inductor of the multilayer structure.
→Detailed explanation

Less space by "2 coils in 1unit" structure inductor.

Low DC resistance type

Bias current characteristics improved

High Q type

Super High Q type

Tight inductance tolerance available

Reflow soldering applicable

Flow soldering applicable

	Products under development. Listed product specifications are subject to change without prior notice. Please contact us for sample availability and mass production schedule.
	Product is in mass production.
	Not recommended for new design.
	We are planning to discontinue production of this item. 'Last Time Buy' date or Discontinuation date may be shown on our web site. Before these dates, please contact us with your requirements.
	Production of this product has stopped.

	Murata particularly recommends this product for reasons of size and performance. Please contact Murata regarding pricing and delivery.

	This is a new product. Please contact Murata regarding pricing and delivery.

Restricted substances	Maximum concentration value
Lead	0.1%
Mercury	0.1%
Cadmium	0.01%
Hexavalent chromium	0.1%
Polybrominated biphenyls (PBB)	0.1%
Polybrominated diphenyl ethers (PBDE)	0.1%
Bis (2-ethylhexyl) phthalate (DEHP)	0.1%
Butyl benzyl phthalate (BBP)	0.1%
Dibutyl phthalate (DBP)	0.1%
Diisobutyl phthalate (DIBP)	0.1%

AEC-Q100 compliant product

AEC-Q200 compliant product

	Derating 1 The test voltage of these products is less than 150% of the rated voltage in the Durability / Operational Life Test. *Usually MLCC used with derating. So even this kind of products, special derating have not set specially. Please refer to below links for details 　For general purpose 　Only for mobile devices 　For automotive
	Derating 2 When the product temperature exceeds 105°C, please use this product within the voltage and temperature derated conditions in the figure below.
	Derating 3 Please apply the derating curve according to the operating temperature. Please refer to detailed specifications sheet for details.
	Derating 4 When the product temperature exceeds 125°C, please use this product within the voltage and temperature derated conditions in the figure below.
	Derating 5 Please apply the rated voltage derating over 150 degree C. Please refer to detailed specifications sheet for details.
	Derating 6 When the product temperature exceeds 105℃, please use this product within the voltage and temperature derated conditions in the figure below.
	Mobile application specific MLCC These MLCC products are designed for use in devices with a typical lifetime of less than 5 years. (Examples: Cellular phone, Smartphone, Tablet PC, Digital camera, Watch, Electronics dictionary, Small-scale server, IPC-9592B class1 equipment, etc. ) Mobile application specific MLCC products are designed so that the estimated useful life can be extended longer than 5 years under the following conditions: 「80% of the rated voltage or less, Maximum operating temperature -20 degree C or less」(10 years or more for general-purpose MLCC products). The estimated useful life under actual operating conditions can be approximated from the following chart. * The estimated useful life is the time when the cumulative failure rate of continuous use is 1%. * The estimated useful life data is provided for reference only. Please use it as a rough estimate when designing and using devices. The data is not intended as a guarantee of the product lifetime. * If you have any questions, please feel free to contact us. Lifetime of MLCC can also be estimated from voltage acceleration and temperature acceleration factors. Please refer to following URL about these lifetime estimation. Ceramic Capacitors FAQ "Are there any methods for estimating the lifetime of a capacitor? " Estimated useful life for mobile application specific MLCC
	Moisture-proof treatment required To prevent the migration and degradation due to flux residue, to keep parts under low moisture condition with resin coating and the equivalent.