LLMCC201208T420RG Ferrite Bead Equivalent & Substitute Parts

Part Overview

The LLMCC201208T420RG is a power line ferrite bead manufactured by Taiyo Yuden, designed for electromagnetic interference (EMI) suppression in surface mount applications. This component operates at 42 Ohms impedance at 100 MHz with a maximum current rating of 4A and is housed in a 0805 (2012 Metric) package. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance characteristics, mechanical compatibility, and thermal operating range. Alternative components may be required due to packaging format availability, inventory considerations, or design phase requirements.

Substiute Parts

LLMCC201208T420RG

Taiyo YudenIn Stock: 960LLMCC201208T420RG Datasheet

Current PartRFQ

FBMJ2125HS420-T

Taiyo YudenIn Stock: 90342FBMJ2125HS420-T Datasheet

Parametric EquivalentRFQ

FBMJ2125HS420-T8

Taiyo YudenIn Stock: 4208FBMJ2125HS420-T8 Datasheet

Parametric EquivalentRFQ

LSMCC201208T420RG

Taiyo YudenIn Stock: 7680LSMCC201208T420RG Datasheet

Parametric EquivalentRFQ

Z0805C420APWST

KEMETIn Stock: 1544Z0805C420APWST Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LLMCC201208T420RG is determined by the following criteria:

Electrical Parameters (Critical):

• Impedance: 42 Ohms @ 100 MHz
• Current Rating: 4A maximum
• DC Resistance: 8mOhm maximum
• Operating Temperature: -40°C ~ 125°C

Mechanical Parameters (Critical):

• Package: 0805 (2012 Metric)
• Mounting Type: Surface Mount
• Physical Dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm)
• Height: 0.041" (1.05mm) maximum

Compliance Parameters:

• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

All identified substitute parts match these parameters exactly. Packaging format (Tape & Reel, Cut Tape, or Digi-Reel) represents a secondary consideration and does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (New Designs): The LSMCC201208T420RG (Taiyo Yuden LSMC series) is the recommended substitute for new design implementations. This part maintains Active product status, ensuring long-term availability and manufacturing support. It provides identical electrical and mechanical specifications to the LLMCC201208T420RG while offering higher inventory levels (7635 units in stock).

Secondary Selection (Existing Inventory): The FBMJ2125HS420-T8 (Taiyo Yuden FB series, Tape & Reel format) is electrically and mechanically equivalent and maintains the same packaging format as the primary part. However, this component carries "Not For New Designs" status, indicating potential future discontinuation. This part is suitable for legacy system support or existing production runs where design changes are not feasible.

Alternative Format (Cut Tape Applications): The FBMJ2125HS420-T (Taiyo Yuden FB series, Cut Tape & Digi-Reel format) provides identical electrical performance with alternative packaging. This format is applicable to applications requiring smaller quantity dispensing or automated pick-and-place systems configured for cut tape reels. Product status is "Not For New Designs."

Cross-Manufacturer Option (Legacy Support Only): The Z0805C420APWST (KEMET Z-PWS series) is electrically and mechanically equivalent but carries Obsolete product status. This component is not recommended for new applications and should be used only when existing designs require component-level compatibility with legacy assemblies.

All substitute parts maintain RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard surface mount assembly processes and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can LSMCC201208T420RG be used as a direct replacement for LLMCC201208T420RG?

A: Yes. The LSMCC201208T420RG is a parametric equivalent with identical impedance (42 Ohms @ 100 MHz), current rating (4A), DC resistance (8mOhm), operating temperature range (-40°C ~ 125°C), and package dimensions (0805 2012 Metric). Both parts are RoHS3 compliant with MSL 1 rating. The primary difference is the series designation (LSMC versus LLMC) and product status (Active for both).

Q: What is the difference between Tape & Reel and Cut Tape packaging formats?

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels, typically used for high-volume automated assembly. Cut Tape (CT) packaging provides components on shorter tape segments, suitable for lower-volume applications or manual assembly. Electrically and mechanically, components in both formats are identical. The LLMCC201208T420RG is supplied in Tape & Reel format; equivalent parts in Cut Tape format (FBMJ2125HS420-T) are available as alternatives.

Q: Why is FBMJ2125HS420-T marked "Not For New Designs"?

A: "Not For New Designs" status indicates that the manufacturer has designated this part for legacy support only and may discontinue production. For new product development, Active status parts such as LLMCC201208T420RG or LSMCC201208T420RG are preferred to ensure long-term supply chain stability and manufacturing support.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the 0805 (2012 Metric) package with identical physical dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm) and maximum height (0.041" / 1.05mm). PCB footprints designed for the LLMCC201208T420RG accommodate all listed substitute parts without modification.

Q: Can Z0805C420APWST be used in new designs?

A: No. The Z0805C420APWST carries Obsolete product status, indicating discontinued manufacturing. This part is not suitable for new design implementations. Use Active status alternatives such as LSMCC201208T420RG or LLMCC201208T420RG for new applications.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. These certifications ensure compatibility with standard surface mount assembly processes and environmental regulations applicable to electronic components.

Q: Is there a performance difference between Taiyo Yuden and KEMET ferrite beads in this specification?

A: All parts listed meet identical electrical specifications: 42 Ohms impedance at 100 MHz, 4A current rating, and 8mOhm maximum DC resistance. Performance differences, if any, are not reflected in the provided parametric data. Component selection should be based on product status, availability, and packaging format requirements.