EMI0805R-40 Ferrite Bead Equivalent & Substitute Parts

Part Overview

The EMI0805R-40 is a single-line ferrite bead manufactured by API Delevan Inc., designed for electromagnetic interference (EMI) suppression in surface mount applications. This component operates at 40 Ohms impedance at 100 MHz with a maximum current rating of 600mA and is packaged in the 0805 (2012 Metric) form factor. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the critical parameters: impedance at frequency, package type, mounting configuration, and operating temperature range.

Substiute Parts

EMI0805R-40

API Delevan Inc.In Stock: 955EMI0805R-40 Datasheet

Current PartRFQ

MH2029-400Y

Bourns Inc.In Stock: 20883MH2029-400Y Datasheet

DirectRFQ

FB201209T-400Y-S

Cal-Chip Electronics, Inc.In Stock: 140861FB201209T-400Y-S Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EMI0805R-40 is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

• Impedance @ 100 MHz: 40 Ohms (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Number of Lines: 1 (exact match required)
• Operating Temperature Range: -55°C to 125°C (minimum requirement)

Allowable Variation Parameters:

• Current Rating (Max): Substitute must equal or exceed 600mA
• DC Resistance (Max): Substitute must not exceed 50mOhm
• Height (Max): Substitute must not exceed 1.10mm
• Size / Dimension: Substitute length and width must not exceed 2.00mm x 1.25mm

Compliance Requirements:

• RoHS Status: ROHS3 Compliant or equivalent
• Moisture Sensitivity Level: MSL 1 (Unlimited) or better
• REACH Status: REACH Unaffected

Two substitute parts meet these criteria: MH2029-400Y (Bourns Inc.) and FB201209T-400Y-S (Cal-Chip Electronics, Inc.).

Parameter Comparison

Engineering Selection Recommendations

MH2029-400Y (Bourns Inc.) qualifies as a direct substitute with enhanced performance characteristics. This part exceeds the current rating requirement (5A versus 600mA) and provides superior DC resistance (20mOhm versus 50mOhm maximum). The dimensional footprint is compatible with 0805 (2012 Metric) PCB layouts. All compliance certifications (ROHS3, REACH Unaffected) align with the original specification. This substitute is suitable for applications requiring higher current capacity or lower insertion loss.

FB201209T-400Y-S (Cal-Chip Electronics, Inc.) qualifies as a parametric equivalent with matching electrical and mechanical specifications. This part meets the current rating requirement (800mA versus 600mA) and maintains identical DC resistance maximum (50mOhm). The dimensional footprint is fully compatible with 0805 (2012 Metric) PCB layouts. RoHS compliance is confirmed. This substitute is suitable for direct replacement in existing designs without performance degradation.

Both substitute parts maintain Active product status and unlimited moisture sensitivity level (MSL 1), ensuring long-term availability and consistent manufacturing quality.

Frequently Asked Questions (FAQ)

Q: Can MH2029-400Y be used in place of EMI0805R-40 without circuit redesign?

A: Yes. MH2029-400Y meets all mandatory electrical parameters (40 Ohms @ 100 MHz, single-line configuration) and mechanical requirements (0805 package, surface mount, identical height). The higher current rating (5A) and lower DC resistance (20mOhm) represent performance improvements that do not require circuit modification.

Q: What is the difference between MH2029-400Y and FB201209T-400Y-S?

A: Both parts match the EMI0805R-40 impedance (40 Ohms @ 100 MHz) and package (0805 2012 Metric). MH2029-400Y provides higher current capacity (5A versus 800mA) and lower DC resistance (20mOhm versus 50mOhm). FB201209T-400Y-S maintains identical DC resistance to the original part. Selection depends on application current requirements and insertion loss tolerance.

Q: Are all three parts interchangeable on the same PCB?

A: Yes. All three parts share identical package dimensions (0805 2012 Metric), mounting type (surface mount), and height (1.10mm maximum). PCB footprints designed for EMI0805R-40 accommodate MH2029-400Y and FB201209T-400Y-S without layout modification.

Q: Do the substitute parts have the same operating temperature range?

A: Yes. All three parts operate across -55°C to 125°C, meeting identical thermal specifications.

Q: What compliance certifications apply to the substitute parts?

A: MH2029-400Y and FB201209T-400Y-S both carry RoHS compliance and REACH Unaffected status. MH2029-400Y is ROHS3 compliant, matching the original specification. FB201209T-400Y-S is RoHS compliant. Both parts maintain MSL 1 (Unlimited) moisture sensitivity level.

Q: Which substitute part should be selected for high-current applications?

A: MH2029-400Y is specified for applications requiring current capacity up to 5A, compared to 600mA for the original EMI0805R-40 and 800mA for FB201209T-400Y-S.

Q: Are there inventory considerations when selecting a substitute?

A: Inventory levels are provided for reference: EMI0805R-40 (923 Pcs), MH2029-400Y (20,799 Pcs), FB201209T-400Y-S (140,843 Pcs). Availability may influence procurement decisions based on project timeline requirements.