LB2012T220M Equivalent & Substitute Parts

Part Overview

The LB2012T220M is a 22 µH unshielded drum core wirewound inductor manufactured by Taiyo Yuden, rated for 80 mA continuous current with 1.7Ohm DC resistance in a 0805 (2012 Metric) surface mount package. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Identification of equivalent substitute parts is necessary for applications requiring continued sourcing, design updates, or component replacement in existing systems.

Substiute Parts

LB2012T220M

Taiyo YudenIn Stock: 47339LB2012T220M Datasheet

Current PartRFQ

LQM21FN220N00L

Murata ElectronicsIn Stock: 3796LQM21FN220N00L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LB2012T220M is determined by the following critical parameters:

Mandatory Matching Criteria:

• Inductance value: 22 µH
• Package / Case: 0805 (2012 Metric)
• Mounting Type: Surface Mount
• Physical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm)
• Height - Seated (Max): 0.057" (1.45mm)

Functional Compatibility Criteria:

• Current Rating must be sufficient for the application circuit
• DC Resistance (DCR) must be acceptable for the intended use
• Operating Temperature Range must encompass the application environment
• RoHS compliance status must meet regulatory requirements

The substitute part LQM21FN220N00L from Murata Electronics satisfies the mandatory matching criteria. However, differences exist in current rating, DC resistance, core type, and shielding characteristics that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

LQM21FN220N00L Substitution Considerations:

The LQM21FN220N00L is an active product from Murata Electronics with ROHS3 compliance and unlimited moisture sensitivity rating, matching the regulatory and environmental handling requirements of the LB2012T220M.

Critical Differences Requiring Application Evaluation:

1. Current Rating Disparity: The LQM21FN220N00L is rated for 13 mA maximum current, compared to the LB2012T220M's 80 mA rating. This substitute is suitable only for applications with current requirements not exceeding 13 mA.

2. DC Resistance: The LQM21FN220N00L exhibits significantly lower DC resistance (0.455 Ohm max) compared to the LB2012T220M (1.7 Ohm). This reduction in resistance results in lower power dissipation and heat generation in the inductor.

3. Core Type and Shielding: The LB2012T220M uses an unshielded drum core wirewound construction, while the LQM21FN220N00L employs a shielded multilayer design. Shielded construction reduces electromagnetic interference coupling to adjacent circuit elements.

4. Operating Temperature Range: The LB2012T220M operates from -25°C to 105°C, while the LQM21FN220N00L operates from -40°C to 85°C. Applications requiring operation above 85°C are incompatible with the substitute part.

5. Inductance Tolerance: The LQM21FN220N00L has a wider tolerance specification (±30%) compared to the LB2012T220M (±20%), which may impact circuit performance in tolerance-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the LQM21FN220N00L directly replace the LB2012T220M in all applications?

A: No. The LQM21FN220N00L is suitable only for applications where the circuit current does not exceed 13 mA and the operating temperature remains within -40°C to 85°C. The LB2012T220M supports 80 mA current and operates to 105°C.

Q: What is the impact of the lower DC resistance in the LQM21FN220N00L?

A: Lower DC resistance (0.455 Ohm vs. 1.7 Ohm) reduces resistive losses and heat dissipation within the inductor. This is generally beneficial for efficiency but may alter circuit behavior if the original design relied on the higher resistance value for damping or current limiting.

Q: Are both parts physically compatible with the same PCB footprint?

A: Yes. Both parts use the 0805 (2012 Metric) package with identical physical dimensions (0.079" L x 0.049" W) and maximum seated height (0.057"). PCB footprints are interchangeable.

Q: What is the significance of shielding in the LQM21FN220N00L?

A: The shielded multilayer construction of the LQM21FN220N00L reduces radiated electromagnetic fields compared to the unshielded drum core design of the LB2012T220M. This is advantageous in noise-sensitive applications but may not be necessary in all circuits.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the LB2012T220M and LQM21FN220N00L are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting equivalent regulatory and environmental handling requirements.

Q: What should be verified before substituting the LQM21FN220N00L?

A: Verify that the application circuit current requirement does not exceed 13 mA, the operating temperature range is within -40°C to 85°C, and the wider inductance tolerance (±30%) is acceptable for circuit performance.