PMC0805-300 Ferrite Bead Equivalent & Substitute Parts

Part Overview

The PMC0805-300 is a 30 Ohm ferrite bead in 0805 (2012 Metric) surface mount package manufactured by Bourns Inc. This component is designed for single-line signal and power filtering applications with a maximum current rating of 400mA and DC resistance of 300mOhm. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Impedance @ Frequency	30 Ohms @ 100 MHz
Current Rating (Max)	400mA
DC Resistance (DCR) (Max)	300mOhm
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 125°C
Number of Lines	1
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the PMC0805-300 are classified based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

Impedance @ 100 MHz: 30 Ohms (exact match) or 32 Ohms (parametric equivalent within tolerance)
Package / Case: 0805 (2012 Metric) — mandatory for PCB compatibility
Mounting Type: Surface Mount — required for assembly process compatibility
Operating Temperature Range: -55°C ~ 125°C — must meet or exceed this range
Number of Lines: 1 — single-line configuration

Secondary Compatibility Factors:

Current Rating (Max): Must equal or exceed 400mA
DC Resistance (DCR): Lower values indicate improved performance; values up to 300mOhm are acceptable
Product Status: Active parts are preferred over obsolete classifications
RoHS Compliance: ROHS3 Compliant parts are preferred for regulatory alignment

Substitutes are grouped into two categories: Direct Manufacturer Equivalents (same impedance and DCR characteristics) and Parametric Equivalents (same impedance tolerance with improved electrical characteristics).

Parameter Comparison

Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Package	Product Status	RoHS Status
PMC0805-300	Bourns Inc.	30 Ohms	400mA	300mOhm	0805 (2012 Metric)	Obsolete	RoHS non-compliant
MG2029-300Y	Bourns Inc.	30 Ohms	400mA	100mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
MH2029-300Y	Bourns Inc.	30 Ohms	3A	25mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
FB201209T-300Y-S-1	Cal-Chip Electronics, Inc.	30 Ohms	800mA	50mOhm	0805 (2012 Metric)	Active	RoHS Compliant
74279201	Würth Elektronik	32 Ohms	500mA	150mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
ILBB0805ER320V	Vishay Dale	32 Ohms	600mA	60mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
WLBD2012K2U300TP	Walsin Technology Corporation	30 Ohms	800mA	50mOhm	0805 (2012 Metric)	Active	Not specified

Engineering Selection Recommendations

Direct Manufacturer Equivalents (Bourns Inc.):

MG2029-300Y and MH2029-300Y are active Bourns products with identical impedance (30 Ohms @ 100 MHz) and superior electrical characteristics. MG2029-300Y maintains the 400mA current rating with reduced DCR (100mOhm vs. 300mOhm). MH2029-300Y offers significantly higher current capacity (3A) and minimal DCR (25mOhm), suitable for applications requiring enhanced thermal performance. Both are ROHS3 Compliant.

Parametric Equivalents (30 Ohms @ 100 MHz):

FB201209T-300Y-S-1 (Cal-Chip Electronics) and WLBD2012K2U300TP (Walsin Technology) provide exact impedance matching with superior current ratings (800mA) and lower DCR (50mOhm). Both are active products. FB201209T-300Y-S-1 carries RoHS Compliance certification.

Parametric Equivalents (32 Ohms @ 100 MHz):

74279201 (Würth Elektronik) and ILBB0805ER320V (Vishay Dale) operate at 32 Ohms impedance, representing a 6.7% deviation from the original 30 Ohms specification. Both are active products with ROHS3 Compliance. These parts are suitable for applications where impedance tolerance permits this variation. 74279201 provides 500mA current capacity with 150mOhm DCR. ILBB0805ER320V offers 600mA current capacity with 60mOhm DCR.

Frequently Asked Questions (FAQ)

Q: Can I use a 32 Ohm ferrite bead as a direct replacement for the 30 Ohm PMC0805-300?

A: 32 Ohm parts (74279201, ILBB0805ER320V) are parametric equivalents with a 6.7% impedance deviation. Compatibility depends on your circuit's impedance tolerance specifications. If your design requires exact 30 Ohm impedance, use direct equivalents: MG2029-300Y, MH2029-300Y, FB201209T-300Y-S-1, or WLBD2012K2U300TP.

Q: What is the difference between MG2029-300Y and MH2029-300Y?

A: Both are Bourns active products with 30 Ohms @ 100 MHz impedance and ROHS3 Compliance. MG2029-300Y maintains 400mA current rating with 100mOhm DCR. MH2029-300Y provides higher current capacity (3A) with significantly lower DCR (25mOhm), offering better thermal performance for high-current applications.

Q: Is the PMC0805-300 still available?

A: The PMC0805-300 is classified as obsolete. Active substitute parts are available from multiple manufacturers: Bourns (MG2029-300Y, MH2029-300Y), Cal-Chip Electronics (FB201209T-300Y-S-1), Würth Elektronik (74279201), Vishay Dale (ILBB0805ER320V), and Walsin Technology (WLBD2012K2U300TP).

Q: Do all substitute parts meet RoHS compliance requirements?

A: Most active substitutes are ROHS3 Compliant (MG2029-300Y, MH2029-300Y, 74279201, ILBB0805ER320V). FB201209T-300Y-S-1 is RoHS Compliant. WLBD2012K2U300TP RoHS status is not specified in available documentation.

Q: Can I use a higher current-rated ferrite bead in place of the PMC0805-300?

A: Yes. Higher current ratings (MH2029-300Y at 3A, FB201209T-300Y-S-1 at 800mA, ILBB0805ER320V at 600mA) are backward compatible with the original 400mA requirement. Lower DCR values in higher-rated parts improve thermal performance and reduce insertion loss.

Q: Are all substitute parts available in the same 0805 package?

A: Yes. All listed substitute parts use the 0805 (2012 Metric) surface mount package, ensuring PCB footprint compatibility with the original PMC0805-300 design.

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