LB2016T470M Equivalent & Substitute Parts

Part Overview

The LB2016T470M is a 47 µH unshielded drum core wirewound inductor manufactured by Taiyo Yuden, rated for 70 mA continuous current with 2.4 Ohm DC resistance. This component is packaged in 0806 (2016 Metric) surface mount format and operates across the temperature range of -25°C to 105°C. The part carries a Product Status designation of "Not For New Designs," indicating that Taiyo Yuden has discontinued active development and support for this model. Identification of equivalent and substitute parts is necessary to support existing designs, facilitate component sourcing for legacy systems, and enable transition to active product lines where applicable.

Substiute Parts

LB2016T470M

Taiyo YudenIn Stock: 8302LB2016T470M Datasheet

Current PartRFQ

LQM21FN470N00L

Murata ElectronicsIn Stock: 1652LQM21FN470N00L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LB2016T470M requires matching of critical electrical and mechanical parameters that define functional equivalence within the inductor category. The primary substitution criteria are:

Electrical Parameters: Inductance value must remain 47 µH to maintain circuit performance. Current rating of the substitute must equal or exceed the 70 mA requirement of the original design. DC resistance characteristics must be compatible with the circuit's power dissipation and impedance specifications.

Mechanical Parameters: Package form factor and mounting type must support direct replacement on existing printed circuit boards. Surface mount designation is mandatory. Physical dimensions, particularly height when seated, must not exceed design constraints.

Environmental & Compliance Parameters: Operating temperature range must encompass or exceed the -25°C to 105°C specification. RoHS3 compliance and MSL rating must be maintained to ensure regulatory and manufacturing process compatibility.

The substitute part LQM21FN470N00L from Murata Electronics shares the identical 47 µH inductance value and surface mount technology. However, critical differences exist in current rating, DC resistance, package dimensions, and operating temperature range that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The LQM21FN470N00L substitute part maintains ROHS3 compliance and MSL rating equivalent to the LB2016T470M, satisfying regulatory and manufacturing process requirements. The substitute achieves lower DC resistance (780 mOhm versus 2.4 Ohm), which reduces power dissipation in the inductor element.

However, the substitute part exhibits a current rating of 7 mA, which is substantially lower than the 70 mA rating of the original part. This represents a tenfold reduction in current-handling capacity and constitutes a critical limitation for applications requiring the full 70 mA current specification.

The substitute part operates across a temperature range of -40°C to 85°C. The upper temperature limit of 85°C is lower than the original part's 105°C maximum, which may restrict use in high-temperature environments.

Package dimensions differ between the two parts. The substitute uses 0805 (2012 Metric) format with reduced width (1.25mm versus 1.60mm) and height (1.45mm versus 1.80mm). These dimensional differences may affect PCB layout compatibility and require verification against design constraints.

Selection of the LQM21FN470N00L as a substitute is appropriate only for applications where the circuit current requirement does not exceed 7 mA and the operating temperature remains below 85°C. For applications requiring the full 70 mA current capacity or extended temperature operation to 105°C, alternative parts must be sourced.

Frequently Asked Questions (FAQ)

Q: Can the LQM21FN470N00L directly replace the LB2016T470M in all applications?

A: No. The substitute part has a maximum current rating of 7 mA compared to the original part's 70 mA rating. Direct substitution is only valid for circuits operating at or below 7 mA. Applications requiring higher current will experience inductor saturation and performance degradation with the substitute part.

Q: What is the impact of the different package sizes (0806 versus 0805)?

A: The substitute part uses a smaller 0805 (2012 Metric) package with reduced width and height dimensions. While the length remains identical at 2.00mm, the width decreases from 1.60mm to 1.25mm and height from 1.80mm to 1.45mm. PCB layout compatibility must be verified, as the smaller footprint may not align with existing pad patterns designed for 0806 format.

Q: How do the DC resistance values affect circuit performance?

A: The substitute part has significantly lower DC resistance (780 mOhm maximum versus 2.4 Ohm). Lower resistance reduces power dissipation in the inductor but may alter circuit impedance characteristics and frequency response. Circuit analysis is required to determine if this change affects overall system performance.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the LB2016T470M and LQM21FN470N00L carry ROHS3 compliance certification and MSL rating of 1 (Unlimited), ensuring compatibility with modern manufacturing processes and regulatory requirements.

Q: What is the significance of the "Not For New Designs" status on the original part?

A: This designation indicates that Taiyo Yuden has discontinued active support and development for the LB2016T470M. The part remains available in existing inventory but will not receive design updates or extended availability guarantees. New designs should transition to active product lines such as the Murata LQM21 series where applicable.

Q: How do the operating temperature ranges compare?

A: The original part operates from -25°C to 105°C, while the substitute operates from -40°C to 85°C. The substitute provides lower temperature capability but has a reduced upper temperature limit. Applications requiring operation above 85°C cannot use the substitute part.

Q: What is the difference between drum core wirewound and multilayer inductor construction?

A: The original part uses drum core wirewound construction with ferrite material, while the substitute uses multilayer construction. These different core technologies result in different frequency characteristics, shielding properties, and saturation behavior. The substitute's multilayer design provides shielding, whereas the original is unshielded.