PMH0805-800 Ferrite Bead Equivalent & Substitute Parts

Part Overview

The PMH0805-800 is a 0805 (2012 Metric) surface mount ferrite bead manufactured by Bourns Inc., rated for 80 Ohms impedance at 100 MHz with a maximum current rating of 2A and 100mOhm DC resistance. This component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts from active manufacturers is necessary to maintain design continuity and ensure long-term component availability for new production runs and system updates.

Substiute Parts

PMH0805-800

Bourns Inc.In Stock: 888PMH0805-800 Datasheet

Current PartRFQ

MH2029-800Y

Bourns Inc.In Stock: 90040MH2029-800Y Datasheet

DirectRFQ

74279220800

Würth ElektronikIn Stock: 128574279220800 Datasheet

Parametric EquivalentRFQ

BBPY00201209700Y00

Pulse ElectronicsIn Stock: 24136BBPY00201209700Y00 Datasheet

Parametric EquivalentRFQ

BBPY00201209800Y00

Pulse ElectronicsIn Stock: 16385BBPY00201209800Y00 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PMH0805-800 is determined by the following critical parameters:

• Impedance @ 100 MHz: Must be 80 Ohms or within acceptable tolerance for the application
• Package / Case: Must be 0805 (2012 Metric) for mechanical and electrical compatibility
• Mounting Type: Must be Surface Mount
• Operating Temperature Range: Must support -55°C ~ 125°C minimum
• Number of Lines: Must be 1 (single line ferrite bead)
• Current Rating: Must meet or exceed 2A requirement
• DC Resistance: Lower values are acceptable as they represent improved performance

The substitute parts listed below meet these core electrical and mechanical parameters, enabling direct replacement in PCB designs without layout modifications.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Preferred): MH2029-800Y and BBPY00201209800Y00 provide exact impedance matching at 80 Ohms @ 100 MHz with improved current ratings (3A) and reduced DC resistance (40mOhm). Both are active products with ROHS3 compliance, ensuring regulatory alignment and long-term availability.

Performance-Enhanced Alternative: 74279220800 (Würth Elektronik) offers the highest current rating (4A) and lowest DC resistance (18mOhm) while maintaining 80 Ohms impedance. This part is suitable for applications requiring superior thermal performance and current handling capacity.

Impedance Variant: BBPY00201209700Y00 operates at 70 Ohms @ 100 MHz, representing a 12.5% impedance reduction. This part is applicable only when circuit design permits impedance tolerance or when lower impedance filtering is beneficial.

All substitute parts maintain identical package dimensions (0805 / 2012 Metric), operating temperature range (-55°C ~ 125°C), and moisture sensitivity level (MSL 1), ensuring mechanical and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can MH2029-800Y directly replace PMH0805-800 without PCB modifications?

A: Yes. Both parts use the 0805 (2012 Metric) package with identical footprint dimensions. No layout changes are required. The higher current rating (3A vs 2A) and lower DC resistance (40mOhm vs 100mOhm) represent performance improvements.

Q: What is the difference between the 80 Ohm and 70 Ohm variants?

A: BBPY00201209800Y00 maintains exact impedance matching at 80 Ohms @ 100 MHz. BBPY00201209700Y00 operates at 70 Ohms, a 12.5% reduction. Selection depends on circuit impedance requirements and filtering specifications. Verify application tolerance before substitution.

Q: Are all substitute parts RoHS compliant?

A: Yes. MH2029-800Y, 74279220800, BBPY00201209700Y00, and BBPY00201209800Y00 are all ROHS3 compliant. The original PMH0805-800 is RoHS non-compliant, making these substitutes necessary for new designs subject to RoHS regulations.

Q: Which substitute offers the best thermal performance?

A: 74279220800 (Würth Elektronik) provides the lowest DC resistance at 18mOhm and highest current rating at 4A, resulting in minimal power dissipation and superior thermal characteristics compared to other alternatives.

Q: Can I use these parts interchangeably in existing designs?

A: Yes, provided the circuit design accommodates the electrical parameter ranges. All substitutes maintain the same package, mounting type, and operating temperature range. Verify impedance tolerance and current requirements for your specific application before implementation.