BLA31 inductor surface mount Series

The BLA31 inductor series from Murata is a set of ferrite bead arrays designed primarily for EMI (electromagnetic interference) suppression in surface-mount applications. These components are commonly used in power supplies, switch-mode power converters, and other high-frequency circuits where reducing radiated emissions is crucial.

If you're working on designs that require effective EMI filtering without taking up too much board space, these inductors are a great choice. They offer a compact solution that can be easily integrated into PCB layouts, making them ideal for both new design starts and as part of component upgrades in existing boards.

One thing worth noting is that engineers tend to reach for these when they need a quick and reliable way to add EMI suppression without complicating their circuit too much. The BLA31 series provides a good balance between performance and size, making it a popular option in many applications where space is at a premium. Additionally, the robust construction of these ferrite beads ensures long-term reliability, which is especially important in demanding environments.

Mfr Part #	Quantity Available	Price	Category	Standard Package	Impedance	Tolerance	Current Rating (Max)	Resistance - Initial (Ri) (Min)	Depth	Height	Package / Case	Type	Core Material	Product	Lead Time	Subcategory	Factory Pack Quantity	RoHS	Filter Type	Test Frequency	DC Resistance (DCR)	Impedance @ Frequency	Width	Packaging	Height (Max)	Mounting Type	Length - Overall	Size / Dimension	Termination Style	Operating Temperature	Product Category	EU RoHS	Industry Aliases	MOQ	Unit Pack	Size	Length	Automotive	Leadfree Defin	Current - Output	Material	Temperature - Test	Series	Other Names	Rad Hardened	Military Standard	Inductance	Current - DC Forward (If) (Max)	Diameter	Matchcode	Failure Rate	Standard Leadtime	Application Specifics	Applications	B25/100	Weight	DELETED	SVHC	Tariff No	Current Rating - DC	DC Resistance (DCR) (Max)	Mounting Feature	Function	Resistance	Range deg/s
BLA31AG600SN4D Ind Chip Bead Array 60Ohm 25% 100MHz Ferrite 200mA 1206 Paper T/R Ferrite Beads Chip Array 60Ohm 25% 100MHz 200mA 150mOhm DCR 1206 Paper T/R BLA3216A600SG4T1M0-10 FERRITE ARRAY 60 OHM 200MA 1206 EMI Filter Beads, Chips & Arrays 60 OHM ARRAY/LOW SPE murata electronics	10	1: ¥2.0467	-	Tape & Reel	60 Ohm	25 %	200 mA	150 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100 MHz	150 mOhm Max	60 Ohm @ 100MHz	1.6 mm	Paper Tape and Reel	0.039" (1.00mm)	Surface Mount	3.4	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	Compliant	BLA3216A600SG4T1	4000	4000	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
7 BLA31AG102SN4D Ind Chip Bead Array 1KOhm 25% 100MHz Ferrite 50mA 1206 Paper T/R Ferrite Beads Chip Array 1KOhm 25% 100MHz 50mA 450mOhm DCR 1206 Paper T/R BLA31AG 1000R 50mA 4xARRAY FERRITE ARRAY 1000 OHM 50MA SMD Ferrite bead SMD 1206 array 1K 50mA EMI Filter Beads, Chips & Arrays 1K OHM ARRAY/LOW SPE Ferrite Beads Chip Bead Array 1KOhm 25% 100MHz 50mA 1206 Paper T/R Murata 铁氧体磁珠, 1000Ω阻抗 @ 100 MHZ, 1206封装, 适用于电磁干扰抑制，通用电子 murata electronics	701	15: ¥2.3208	-	Tape & Reel, Cut Tape	1 KOhm	25 %	50 mA	450 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100MHz	0.45Ohm	1 kOhm @ 100MHz	1.6mm	Paper Tape and Reel	0.039" (1.00mm)	SMD	3.2 mm	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	Compliant	BLA3216A102SG4T1	4000	4000	1206	3.2mm	NO	RoHS-conform	50mA	Ferrite	-55°C	-	490-1002-1	No	Not Required	Not Required uH	50 mA	Not Required mm	FEC1000R1206	Not Required	12 weeks	EMI Suppression, General Electronics	-	-	-	-	-	-	-	-	-	-	-	-
6 BLA31BD121SN4D Ind Chip Bead Array 120Ohm 25% 100MHz Ferrite 150mA 1206 Paper T/R Ferrite Beads Chip Array 120Ohm 25% 100MHz 150mA 300mOhm DCR 1206 Paper T/R BLA3216B121SD4T1M0-10 FERRITE ARRAY 120 OHM 150MA SMD EMI Filter Beads, Chips & Arrays 120 OHM ARRAY/HIGH 2 Murata BLA31BD 系列铁氧体磁珠, 120Ω阻抗 @ 100 MHZ, 1206封装, 适用于电磁干扰抑制 BLA31BD 120R 150mA 0,30R murata electronics	10	1: ¥2.9013	-	Tape & Reel	120 Ohm	25 %	150 mA	300 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100 MHz	300 mOhm Max	120 Ohm @ 100MHz	1.6 mm	Paper Tape and Reel	0.039" (1.00mm)	Surface Mount	3.4	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	Compliant	BLA3216B121SD4T1	4000	4000	1206	3.2mm	NO	RoHS-conform	150 mA	铁氧体	-	BLA31BD	490-1003-1	-	-	-	-	-	-	-	-	-	电磁干扰抑制	120Ω	-	-	-	-	-	-	-	-	-	-
7 BLA31AG601SN4D Ind Chip Bead Array 600Ohm 25% 100MHz Ferrite 100mA 1206 Paper T/R Ferrite Beads Chip Array 600Ohm 25% 100MHz 100mA 350mOhm DCR 1206 Paper T/R BLA31AG 600R 100mA 4xARRAY FERRITE ARRAY 600 OHM 100MA SMD Ferrite bead SMD 1206 array 600R 100mA EMI Filter Beads, Chips & Arrays 600 OHM ARRAY Murata 铁氧体磁珠, 600Ω阻抗 @ 100 MHZ, 1206封装, 适用于电磁干扰抑制，通用电子 murata electronics	10723	340: ¥0.9255	-	Cut Tape	600 Ohm	25 %	100 mA	350 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100MHz	0.35Ohm	600 Ohm @ 100MHz	1.6mm	Paper Tape and Reel	0.039" (1.00mm)	SMD	3.2 mm	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	Compliant	BLA3216A601SG4T1	4000	4000	1206	3.2mm	NO	RoHS-conform	100mA	Ferrite	-55°C	-	490-1001-1	No	Not Required	Not Required uH	100 mA	Not Required mm	FEC600R1206	Not Required	12 weeks	EMI Suppression, General Electronics	-	-	-	-	-	-	-	-	-	-	-	-
3 BLA31AG300SN4D Ind Chip Bead Array 30Ohm 25% 100MHz Ferrite 200mA 1206 Paper T/R Ferrite Beads Chip Array 30Ohm 25% 100MHz 200mA 100mOhm DCR 1206 Paper T/R BLA31AG 30R 200mA 4xARRAY FERRITE ARRAY 30 OHM 200MA 1206 EMI Filter Beads, Chips & Arrays BLA31AG300SN4D FERRITE BEAD, 0.1OHM, 200MA, 1206 murata electronics	10	1: ¥2.8517	-	Tape & Reel	30 Ohm	25 %	200 mA	100 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100MHz	0.10Ohm	30 Ohm @ 100MHz	1.6mm	Paper Tape and Reel	0.039" (1.00mm)	SMD	3.4	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	Compliant	BLA3216A300SG4T1	4000	4000	1206	3.2mm	NO	RoHS-conform	200mA	-	-55°C	:BLA31A	-	-	-	-	-	-	FEC30R1206	-	12 weeks	-	-	-	0.018gr	-	:No SVHC (20-Jun-2013)	85045020	:200mA	:0.1ohm	:SMD	-	:0.1ohm	-
BLA31BD102SN4D/BKN Ind Chip Bead Array 1KOhm 25% 100MHz Ferrite 50mA 1206 Paper T/R murata electronics	10	1: ¥4.6172	-	Cut Tape	1 KOhm	25 %	50 mA	550 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
7 BLA31BD601SN4D Ind Chip Bead Array 600Ohm 25% 100MHz Ferrite 100mA 1206 Paper T/R Ferrite Beads Chip Bead Array 600Ohm 25% 100MHz 100mA 1206 Paper T/R BLA31BD 600R 100mA 4xARRAY FERRITE ARRAY 600 OHM 100MA SMD Ferrite bead SMD 1206 array 600R 100mA EMI Filter Beads, Chips & Arrays 600 OHM ARRAY/HIGH S Murata 铁氧体磁珠, 600Ω阻抗 @ 100 MHZ, 1206封装, 适用于电磁干扰抑制，通用电子 murata electronics	7796	30: ¥2.34	-	Cut Tape, Tape & Reel	600 Ohm	25 %	100 mA	450 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100MHz	0.7Ohm	600 Ohm @ 100MHz	1.6mm	Paper Tape and Reel	0.039" (1.00mm)	SMD	3.2 mm	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	Compliant	BLA3216B601SD4T1	4000	4000	1206	3.2mm	NO	RoHS-conform	50mA	Ferrite	-55°C	-	490-1004-1	No	Not Required	Not Required uH	100 mA	Not Required mm	FEC600R1206	Not Required	12 weeks	EMI Suppression, General Electronics	-	-	-	Compliant	-	-	-	-	-	-	-	-
8 BLA31AG121SN4D Ind Chip Bead Array 120Ohm 25% 100MHz Ferrite 150mA 1206 Paper T/R Ferrite Beads Chip Array 120Ohm 25% 100MHz 150mA 200mOhm DCR 1206 Paper T/R BLA3216A121SG4T1M0-10 FERRITE ARRAY 120 OHM 150MA SMD Ferrite bead SMD 1206 array 120R 150mA EMI Filter Beads, Chips & Arrays BLA31AG121SN4D Ferrite Beads Chip Bead Array 120Ohm 25% 100MHz 150mA 1206 Paper T/R Murata 铁氧体磁珠, 1206封装, 适用于电磁干扰抑制，通用电子 BLA31AG 120R 150mA 4xARRAY murata electronics	10	1: ¥1.3601	-	Tape & Reel	120 Ohm	25 %	150 mA	200 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100 MHz	200 mOhm Max	120 Ohm @ 100MHz	1.6 mm	Paper Tape and Reel	0.039" (1.00mm)	Surface Mount	3.4 mm	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	Compliant	BLA3216A121SG4T1	4000	4000	1206	3.2mm	NO	RoHS-conform	150 mA	Ferrite	125 °C	EMIFIL®, BLA31A	490-1000-1	No	Not Required	Not Required uH	150 mA	Not Required mm	-	Not Required	-	EMI Suppression, General Electronics	电磁干扰抑制，通用电子	-	-	Compliant	-	-	-	-	-	-	-	-
BLA31BD601SN4D/BKN Ind Chip Bead Array 600Ohm 25% 100MHz Ferrite 100mA 1206 Paper T/R murata electronics	10	1: ¥4.6172	-	Cut Tape	600 Ohm	25 %	100 mA	450 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3 BLA31BD221SN4D Ind Chip Bead Array 220Ohm 25% 100MHz Ferrite 150mA 1206 Paper T/R FERRITE ARRAY 220 OHM 150MA 1206 EMI Filter Beads, Chips & Arrays 1206 220ohm +/-25% DCR 0.35ohm Ferrite Beads Chip Bead Array 220Ohm 25% 100MHz 150mA 1206 Paper T/R FERRITE BEAD ARRAY, 1206 CASE, 220OHM Murata BLA31B 系列铁氧体磁珠, 220Ω阻抗 @ 100 MHZ, 3216封装, 适用于通用电子 BLA31B 220R 150mA 4xARRAY murata electronics	8907	1: ¥7.3563	-	Tape & Reel	220 Ohm	25 %	150 mA	350 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100 MHz	350 mOhm Max	220 Ohm @ 100MHz	1.6 mm	Paper Tape and Reel	0.039" (1.00mm)	Surface Mount	3.2 mm	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	-	BLA3216B221SD4T1	-	-	1206	-	-	-	-	-	-	:MURATA - BLA31B Series	-	No	Not Required	Not Required uH	150 mA	Not Required mm	-	Not Required	-	-	-	-	0.00001	Compliant	:No SVHC (20-Jun-2013)	85045020	:150mA	:0.35ohm	:SMD	-	-	:MURATA - BLA31B Series
2 BLA31BD102SN4D EMI Filter Beads, Chokes & Arrays 1KOhm 25% 100MHz Ferrite Beads Chip Array 1KOhm 25% 100MHz 50mA 550mOhm DCR 1206 Paper T/R BLA31BD 1000R 50mA 4xARRAY FERRITE ARRAY 1K OHM 50MA 1206 EMI Filter Beads, Chips & Arrays 1KOhm 25% 100MHz BLA31BD102SN4D Murata Power Solutions BLA31B 系列铁氧体磁珠, 1000Ω阻抗 @ 100 MHZ, 3216封装 Murata Electronics	220	1: ¥3.536	-	4,000	1000Ohm	25%	50mA	550 mOhms	1.8	0.8mm	1206	Chip Bead Array	-	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100MHz	0.7Ohm	1 kOhm @ 100MHz	1.6mm	Paper Tape and Reel	0.039" (1.00mm)	SMD	3.4	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	-	Compliant	-	4000	4000	1206	3.2mm	NO	RoHS-conform	50mA	-	-55°C	-	-	-	-	-	-	-	FEC1000R1206	-	12 weeks	-	-	-	0.018gr	-	-	-	-	-	-	-	-	-
3 BLA31BD471SN4D Ind Chip Bead Array 470Ohm 25% 100MHz Ferrite 100mA 1206 Paper T/R Ferrite Beads Chip Array 470Ohm 25% 100MHz 100mA 400mOhm DCR 1206 Paper T/R BLA3216B471SD4T1M0-10 FERRITE ARRAY 470 OHM 100MA 1206 EMI Filter Beads, Chips & Arrays BLA31BD471SN4D Murata Power Solutions BLA31B 系列铁氧体磁珠, 470Ω阻抗 @ 100 MHZ, 3216封装 murata electronics	50	1: ¥1.1325	-	Tape & Reel	470 Ohm	25 %	100 mA	400 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100 MHz	400 mOhm Max	470 Ohm @ 100MHz	1.6 mm	Paper Tape and Reel	0.039" (1.00mm)	Surface Mount	3.4	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	Compliant	BLA3216B471SD4T1	4000	4000	-	3.2mm	-	-	-	铁氧体	-	BLA31B	-	-	-	-	-	-	-	-	-	-	通用	470Ω	-	-	-	-	-	-	-	Y	-	-
2 BLA31AG221SN4D Ind Chip Bead Array 220Ohm 25% 100MHz Ferrite 150mA 1206 Paper T/R Ferrite Beads Chip Array 220Ohm 25% 100MHz 150mA 250mOhm DCR 1206 Paper T/R FERRITE ARRAY 220 OHM 150MA 1206 EMI Filter Beads, Chips & Arrays 220 OHM ARRAY/LOW SP Murata Power Solutions BLA31A 系列铁氧体磁珠, 220Ω阻抗 @ 100 MHZ, 3216封装 BLA31AG 220R 150mA 4xARRAY murata electronics	100	1: ¥1.7002	-	Tape & Reel	220 Ohm	25 %	150 mA	250 mOhm	1.8 mm	1 mm	1206	Chip Bead Array	Ferrite	Ferrite Chip Bead Arrays	49 Days	Ferrite Beads	4000	Lead free / RoHS Compliant	Differential Mode - 4 Line Array	100 MHz	250 mOhm Max	220 Ohm @ 100MHz	1.6 mm	Paper Tape and Reel	0.039" (1.00mm)	Surface Mount	3.4	0.126" L x 0.063" W (3.20mm x 1.60mm)	SMD/SMT	- 55 C to + 125 C	EMI Filter Beads, Chips & Arrays	Compliant	BLA3216A221SG4T1	-	-	1206	3.2mm	NO	RoHS-conform	150 mA	铁氧体	-55 °C	BLA31A	-	-	-	-	-	-	-	-	-	-	通用	220Ω	-	-	-	-	-	-	-	Y	-	-

cigen-BLA31

Series Images (14)

Documents & Media

Frequently Asked Questions

BLA31 inductor surface mount - Part List

DC Resistance (DCR)

Resistance - Initial (Ri) (Min)

Industry Aliases

Impedance

Impedance @ Frequency

Series

Standard Package

Current Rating (Max)

Other Names

Current - Output

Length - Overall

Current - DC Forward (If) (Max)

Matchcode

Temperature - Test

B25/100

Applications

Tolerance

Test Frequency

Depth

Width

Height

Mounting Type

Material

Current Rating - DC

DC Resistance (DCR) (Max)

Weight