LB3218T151K Equivalent & Substitute Parts

Part Overview

The LB3218T151K is a 150 µH unshielded wirewound surface mount inductor manufactured by Taiyo Yuden. This component is rated for 105 mA continuous current with a DC resistance of 3.2 Ohm and operates across the temperature range of -40°C to 105°C. The part is packaged in a 1207 (3218 Metric) form factor suitable for automated assembly processes.

The LB3218T151K carries a product status designation of "Not For New Designs," indicating that Taiyo Yuden has discontinued active development and support for this particular model line. Identifying equivalent substitute parts is necessary for ongoing production support, design revisions, and long-term component availability assurance.

Substiute Parts

LB3218T151K

Taiyo YudenIn Stock: 1164LB3218T151K Datasheet

Current PartRFQ

LSQBA321818T151K

Taiyo YudenIn Stock: 844LSQBA321818T151K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LB3218T151K is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match Exactly):

• Inductance value: 150 µH
• Inductance tolerance: ±10%
• Current rating: 105 mA minimum
• DC resistance: 3.2 Ohm
• Self-resonant frequency: 7 MHz
• Test frequency: 796 kHz
• Operating temperature range: -40°C to 105°C minimum

Mechanical Parameters (Must Match Exactly):

• Package type: 1207 (3218 Metric)
• Mounting type: Surface Mount
• Physical dimensions: 0.126" L x 0.071" W (3.20mm x 1.80mm)
• Maximum seated height: 0.079" (2.00mm)

Compliance Parameters (Must Match or Exceed):

• RoHS3 compliance
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH unaffected status

The LSQBA321818T151K meets all specified criteria and qualifies as a direct substitute for the LB3218T151K.

Parameter Comparison

Engineering Selection Recommendations

The LSQBA321818T151K is the qualified substitute for the LB3218T151K based on the following engineering criteria:

Electrical Equivalence: All electrical specifications match exactly, including inductance value, tolerance, current rating, DC resistance, and frequency characteristics. The component operates within the identical temperature range and maintains the same test frequency parameters.

Mechanical Compatibility: The substitute part is packaged in the identical 1207 (3218 Metric) form factor with matching physical dimensions and maximum seated height. Surface mount compatibility is preserved, allowing direct replacement in existing PCB layouts without design modification.

Compliance Status: The LSQBA321818T151K maintains full RoHS3 compliance, REACH unaffected status, and identical moisture sensitivity level (MSL 1 - Unlimited). These certifications satisfy regulatory and environmental requirements equivalent to the original part.

Product Status Advantage: The substitute part carries an "Active" product status designation, ensuring ongoing manufacturer support, continued availability, and long-term supply chain stability. This addresses the obsolescence risk associated with the LB3218T151K's "Not For New Designs" status.

Frequently Asked Questions (FAQ)

Q: Can the LSQBA321818T151K be used as a direct replacement for the LB3218T151K without PCB layout changes?

A: Yes. Both parts share identical package dimensions (1207 / 3218 Metric), mounting type (Surface Mount), and physical footprint specifications. No PCB layout modifications are required for substitution.

Q: Are the electrical characteristics identical between these two parts?

A: Yes. The inductance value (150 µH), tolerance (±10%), current rating (105 mA), DC resistance (3.2 Ohm), self-resonant frequency (7 MHz), and operating temperature range (-40°C to 105°C) are identical across both parts.

Q: What is the primary advantage of switching to the LSQBA321818T151K?

A: The LSQBA321818T151K carries an "Active" product status, ensuring manufacturer support and long-term availability. The LB3218T151K is designated "Not For New Designs," indicating discontinued development and potential future supply constraints.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are RoHS3 compliant, REACH unaffected, and carry identical MSL ratings (1 - Unlimited). Regulatory and environmental compliance requirements are satisfied by either part.

Q: Is there a difference in core material between these inductors?

A: The LB3218T151K does not specify core material in the provided data. The LSQBA321818T151K specifies a ferrite core. Both parts deliver identical electrical performance across all specified parameters.

Q: Can these parts be used interchangeably in production?

A: Yes. All electrical, mechanical, and compliance parameters are equivalent. The parts are interchangeable for production applications without circuit redesign or performance degradation.