FB05YTYN301 Ferrite Bead 300 Ohm 0805 Equivalent & Substitute Parts

Part Overview

The FB05YTYN301 is a single-line ferrite bead manufactured by Stackpole Electronics Inc., designed for electromagnetic interference (EMI) suppression in surface mount applications. This component operates at 300 Ohms impedance at 100 MHz with a maximum current rating of 300mA and is housed in the 0805 (2012 Metric) package format. The part maintains Active product status with 1090 pieces currently in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when design specifications allow for components with enhanced electrical characteristics within the same functional category. Substitute ferrite beads must maintain compatibility across impedance specifications, frequency response, package dimensions, and thermal operating ranges to ensure circuit performance integrity.

Key Parameters

Parameter	Value	Unit
Impedance @ Frequency	300 Ohms @ 100 MHz	Ohms
Current Rating (Max)	300mA	mA
DC Resistance (DCR) (Max)	300mOhm	mOhm
Package / Case	0805 (2012 Metric)	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55°C ~ 125°C	°C
Height (Max)	0.043" (1.10mm)	inches (mm)
Size / Dimension	0.079" L x 0.049" W (2.00mm x 1.25mm)	inches (mm)
Number of Lines	1	—

Substitute Part Grouping Explanation

Ferrite bead substitution is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Impedance @ 100 MHz: Must equal 300 Ohms
Package / Case: Must be 0805 (2012 Metric)
Number of Lines: Must be 1
Operating Temperature Range: Must span -55°C to 125°C
Mounting Type: Must be Surface Mount

Secondary Compatibility Parameters:

Current Rating (Max): Substitute parts may equal or exceed the 300mA specification
DC Resistance (DCR) (Max): Substitute parts may equal or be lower than 300mOhm
Height (Max): Must not exceed 0.043" (1.10mm) for PCB clearance compatibility
Size / Dimension: Must maintain 0.079" L x 0.049" W (2.00mm x 1.25mm) footprint

Substitute Classification:

Direct Equivalents (300 Ohm @ 100 MHz, 0805 Package):

2176486-4 (TE Connectivity Passive Product)
2508053017Y0 (Fair-Rite Products Corp.)
742792035 (Würth Elektronik)
ACML-0805-301-T (Abracon LLC)
BBBK00201209301Y00 (Pulse Electronics)
FB201209T-301Y-S (Cal-Chip Electronics, Inc.)
FB201209T-301Y-S-1 (Cal-Chip Electronics, Inc.)
MMZ2012S301AT000 (TDK Corporation)

Near-Equivalent Substitutes (330 Ohm @ 100 MHz, 0805 Package):

BLM21BD331SN1D (Murata Electronics)
FB201209T-331Y-S (Cal-Chip Electronics, Inc.)

These near-equivalent parts operate at 330 Ohms impedance, representing a 10% increase from the primary specification. Selection of these parts requires circuit-level validation to confirm impedance tolerance acceptance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DCR (Max)	Package	Height (Max)	Operating Temp	Product Status	Packaging Type	Inventory
FB05YTYN301	Stackpole Electronics Inc	300 Ohms	300mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active	Tape & Reel (TR)	1090 Pcs
2176486-4	TE Connectivity Passive Product	300 Ohms	300mA	250mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active	Cut Tape (CT)	4358 Pcs
2508053017Y0	Fair-Rite Products Corp.	300 Ohms	300mA	250mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active	Tape & Reel (TR)	64808 Pcs
742792035	Würth Elektronik	300 Ohms	300mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active	Tape & Reel (TR)	30044 Pcs
ACML-0805-301-T	Abracon LLC	300 Ohms	500mA	250mOhm	0805 (2012 Metric)	0.041" (1.05mm)	-55°C ~ 125°C	Active	Tape & Reel (TR)	4374 Pcs
BBBK00201209301Y00	Pulse Electronics	300 Ohms	300mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active	Tape & Reel (TR)	4980 Pcs
FB201209T-301Y-S	Cal-Chip Electronics, Inc.	300 Ohms	300mA	250mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active	Tape & Reel (TR)	104737 Pcs
FB201209T-301Y-S-1	Cal-Chip Electronics, Inc.	300 Ohms	500mA	200mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active	Tape & Reel (TR)	100791 Pcs
MMZ2012S301AT000	TDK Corporation	300 Ohms	600mA	200mOhm	0805 (2012 Metric)	0.041" (1.05mm)	-55°C ~ 125°C	Last Time Buy	Tape & Reel (TR)	2000 Pcs
BLM21BD331SN1D	Murata Electronics	330 Ohms	300mA	300mOhm	0805 (2012 Metric)	0.057" (1.45mm)	-55°C ~ 125°C	Active	Tape & Reel (TR)	8932 Pcs
FB201209T-331Y-S	Cal-Chip Electronics, Inc.	330 Ohms	300mA	250mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active	Tape & Reel (TR)	21028 Pcs

Engineering Selection Recommendations

Recommended Direct Substitutes (300 Ohm @ 100 MHz):

FB201209T-301Y-S (Cal-Chip Electronics, Inc.) — Highest inventory availability (104,737 pcs) with Active product status. Electrical specifications match primary part with reduced DCR (250mOhm). RoHS Compliant certification confirmed.
FB201209T-301Y-S-1 (Cal-Chip Electronics, Inc.) — Enhanced current rating (500mA) and reduced DCR (200mOhm) provide design margin for high-current applications. Active product status with 100,791 pcs in stock. RoHS Compliant.
2508053017Y0 (Fair-Rite Products Corp.) — Largest inventory reserve (64,808 pcs) with Active status. Reduced DCR (250mOhm) and ROHS3 Compliant certification. MSL rating 1 (Unlimited) indicates superior moisture handling.
742792035 (Würth Elektronik) — Active status with 30,044 pcs available. Matches primary part DCR specification (300mOhm). ROHS3 Compliant with MSL 1 (Unlimited) rating.
ACML-0805-301-T (Abracon LLC) — Suitable for applications requiring higher current capacity (500mA). Reduced DCR (250mOhm) and lower height profile (0.041" vs 0.043"). ROHS3 Compliant with MSL 1 (Unlimited).

Conditional Substitutes:

MMZ2012S301AT000 (TDK Corporation) — Highest current rating (600mA) and lowest DCR (200mOhm) provide maximum design flexibility. Product status is Last Time Buy; inventory limited to 2000 pcs. Suitable only for applications where long-term availability is not critical.

Near-Equivalent Substitutes (330 Ohm @ 100 MHz):

FB201209T-331Y-S (Cal-Chip Electronics, Inc.) — 10% impedance increase from primary specification. Active status with 21,028 pcs in stock. Acceptable only when circuit design permits 330 Ohm impedance tolerance.
BLM21BD331SN1D (Murata Electronics) — 10% impedance increase with increased height (0.057" vs 0.043"). May require PCB layout verification for clearance compatibility. Active status with 8932 pcs available.

Parts Not Recommended:

2176486-4 (TE Connectivity) — Available in Cut Tape (CT) packaging only; primary part specifies Tape & Reel (TR). Suitable only for low-volume or prototype applications.
BBBK00201209301Y00 (Pulse Electronics) — Matches primary specifications but lower inventory (4980 pcs) compared to recommended alternatives.

Frequently Asked Questions (FAQ)

Q: Can FB201209T-301Y-S-1 replace FB05YTYN301 in all applications?

A: Yes, within electrical operating parameters. FB201209T-301Y-S-1 maintains identical impedance (300 Ohms @ 100 MHz) and package format (0805). The enhanced current rating (500mA vs 300mA) and reduced DCR (200mOhm vs 300mOhm) provide additional design margin. No circuit modification is required.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is supplied on continuous reels suitable for automated pick-and-place assembly equipment. Cut Tape packaging is supplied in individual tape segments for manual handling or low-volume applications. The electrical component is identical; packaging format affects assembly process compatibility only.

Q: Can 330 Ohm ferrite beads substitute for 300 Ohm specifications?

A: 330 Ohm beads (FB201209T-331Y-S, BLM21BD331SN1D) represent a 10% impedance increase. Substitution is permissible only when circuit design specifications allow impedance tolerance within this range. EMI filtering effectiveness will increase proportionally with impedance. Circuit-level validation is required before implementation.

Q: Why do some substitute parts have lower DCR values?

A: DC Resistance (DCR) represents resistive losses in the ferrite material. Lower DCR values (200mOhm vs 300mOhm) indicate improved efficiency and reduced power dissipation. Parts with lower DCR are direct improvements over the primary specification and are preferred for power-sensitive applications.

Q: Is MMZ2012S301AT000 suitable for new designs?

A: MMZ2012S301AT000 carries Last Time Buy product status with limited inventory (2000 pcs). This part is suitable only for applications where long-term component availability is not required or where existing stock reserves are sufficient. For new product designs requiring multi-year production support, select parts with Active product status.

Q: What does MSL 1 (Unlimited) moisture sensitivity rating indicate?

A: MSL (Moisture Sensitivity Level) 1 (Unlimited) indicates the component requires no special moisture protection during storage or handling. These parts can be stored at standard ambient conditions without desiccant packaging. Parts without MSL specification may require controlled storage conditions.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts carry either RoHS Compliant or ROHS3 Compliant certification. ROHS3 represents the current regulatory standard. Compliance status is suitable for applications subject to European Union Restriction of Hazardous Substances directives.

Q: Can substitute parts with higher current ratings be used in lower-current applications?

A: Yes. Parts with higher current ratings (500mA, 600mA) are fully compatible with applications designed for 300mA operation. The higher rating provides design margin and does not affect circuit performance in lower-current applications.

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