PMH0805-601 Ferrite Bead Equivalent & Substitute Parts

Part Overview

The PMH0805-601 is a 600 Ohm ferrite bead in 0805 (2012 Metric) surface mount package manufactured by Bourns Inc. This component is rated for 1A maximum current with 200mOhm DC resistance and operates across -55°C to 125°C. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Impedance @ Frequency	600 Ohms @ 100 MHz
Current Rating (Max)	1A
DC Resistance (Max)	200mOhm
Package / Case	0805 (2012 Metric)
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Number of Lines	1

Substitute Part Grouping Explanation

Substitute parts for the PMH0805-601 are qualified based on the following criteria:

Mandatory Matching Parameters:

Impedance: 600 Ohms @ 100 MHz
Package: 0805 (2012 Metric)
Mounting Type: Surface Mount
Number of Lines: 1
Operating Temperature Range: -55°C ~ 125°C

Allowable Variations:

Current Rating: Substitutes rated at 1A or higher are acceptable
DC Resistance: Substitutes with 100mOhm to 200mOhm are acceptable
Product Status: Active parts are preferred over obsolete parts
RoHS Compliance: ROHS3 compliant parts are preferred

All listed substitutes maintain the core electrical performance at 600 Ohms @ 100 MHz and are compatible with the 0805 package footprint.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Package	Product Status	RoHS Status
PMH0805-601	Bourns Inc.	600 Ohms	1A	200mOhm	0805 (2012 Metric)	Obsolete	RoHS non-compliant
MH2029-601Y	Bourns Inc.	600 Ohms	1A	200mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
2508056017Y2	Fair-Rite Products Corp.	600 Ohms	2A	100mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
742792040	Würth Elektronik	600 Ohms	2A	150mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
BBPY00201209601Y00	Pulse Electronics	600 Ohms	2A	100mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
FB05YTYH601	Stackpole Electronics Inc	600 Ohms	2A	100mOhm	0805 (2012 Metric)	Active	Not specified
HCB 2012KF-601T10	TAI-TECH Advanced Electronics Co., Ltd.	600 Ohms	1A	200mOhm	0805 (2012 Metric)	Active	RoHS Compliant
HCB10-601-RC	Allied Components International	600 Ohms	2A	100mOhm	0805 (2012 Metric)	Active	RoHS Compliant
ILHB0805ER601V	Vishay Dale	600 Ohms	2A	100mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
MPZ2012S601AT000	TDK Corporation	600 Ohms	2A	100mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant
WLBD2012HCU601TH	Walsin Technology Corporation	600 Ohms	2A	90mOhm	0805 (2012 Metric)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Specifications): MH2029-601Y from Bourns Inc. is the primary direct replacement, matching the PMH0805-601 in current rating (1A) and DC resistance (200mOhm). This part is active and ROHS3 compliant, making it suitable for new designs requiring RoHS compliance.

HCB 2012KF-601T10 from TAI-TECH Advanced Electronics Co., Ltd. provides an alternative with identical electrical specifications and RoHS compliance status.

Enhanced Performance Substitutes (Higher Current Rating): Parts rated at 2A current with reduced DC resistance (100mOhm to 150mOhm) provide improved thermal performance and lower power dissipation. These include:

2508056017Y2 (Fair-Rite Products Corp.)
BBPY00201209601Y00 (Pulse Electronics)
FB05YTYH601 (Stackpole Electronics Inc)
HCB10-601-RC (Allied Components International)
ILHB0805ER601V (Vishay Dale)
MPZ2012S601AT000 (TDK Corporation)
WLBD2012HCU601TH (Walsin Technology Corporation)

742792040 from Würth Elektronik offers 2A rating with 150mOhm DC resistance, balancing performance improvement with closer resistance matching to the original part.

All substitutes maintain the 0805 package footprint and 600 Ohm impedance specification at 100 MHz, ensuring direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use a 2A-rated ferrite bead as a substitute for the 1A PMH0805-601? A: Yes. A higher current rating indicates the component can handle greater current without exceeding thermal limits. The 2A-rated substitutes are electrically compatible and provide additional design margin.

Q: What is the significance of DC resistance variation between 90mOhm and 200mOhm? A: DC resistance determines power dissipation in the component. Lower DC resistance (90-100mOhm) generates less heat at the same current level. The PMH0805-601 specifies 200mOhm maximum; substitutes with lower values provide improved thermal performance without affecting impedance at 100 MHz.

Q: Are all listed substitutes compatible with the same PCB footprint? A: Yes. All substitutes use the 0805 (2012 Metric) package with identical land pattern dimensions (0.079" L x 0.049" W nominal). Physical height variations (0.026" to 0.043") do not affect PCB assembly compatibility.

Q: Why is RoHS compliance important for ferrite bead selection? A: RoHS compliance indicates the component meets restrictions on hazardous substances. ROHS3 compliant parts are required for many applications and markets. The original PMH0805-601 is RoHS non-compliant; active substitutes with ROHS3 compliance are recommended for new designs.

Q: What is the difference between Power Line and Signal Line filter types? A: Filter type designation indicates the intended application. Power Line ferrite beads are optimized for power supply filtering, while Signal Line beads are optimized for signal integrity. Both types at 600 Ohms @ 100 MHz are electrically equivalent for the core impedance specification.

Q: Can I substitute based on impedance alone? A: No. While impedance at 100 MHz is the primary electrical parameter, current rating and DC resistance must also be verified. The package, operating temperature range, and number of lines must match exactly. All parameters listed in the Key Parameters section must be satisfied.

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