CB2518T2R2M Equivalent & Substitute Parts

Part Overview

The CB2518T2R2M is a 2.2 µH unshielded drum core wirewound inductor manufactured by Taiyo Yuden, rated for 1.3 A continuous current with a maximum DC resistance of 117 mOhm. This surface mount component is packaged in the 1007 (2518 Metric) form factor and operates across the temperature range of -40°C to 105°C.

The CB2518T2R2M carries a product status designation of "Not For New Designs," indicating that Taiyo Yuden has transitioned this part to end-of-life status. For new circuit designs and ongoing production requirements, equivalent substitute parts with active product status are available to ensure long-term supply chain continuity and design flexibility.

Substiute Parts

CB2518T2R2M

Taiyo YudenIn Stock: 3389CB2518T2R2M Datasheet

Current PartRFQ

LSQNA251818T2R2M

Taiyo YudenIn Stock: 819LSQNA251818T2R2M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CB2518T2R2M is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Inductance value: 2.2 µH
• Inductance tolerance: ±20%
• Current rating: 1.3 A
• Saturation current (Isat): 510 mA
• Self-resonant frequency: 68 MHz
• Test frequency: 7.96 MHz
• Operating temperature range: -40°C to 105°C

Mechanical Parameters (Must Match):

• Package / Case: 1007 (2518 Metric)
• Mounting type: Surface Mount
• Physical dimensions: 0.098" L x 0.071" W (2.50mm x 1.80mm)
• Maximum seated height: 0.079" (2.00mm)

Material & Construction (Must Match):

• Core material: Ferrite
• Shielding: Unshielded
• Construction type: Wirewound

Compliance Parameters (Must Match):

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

The LSQNA251818T2R2M meets all substitution criteria with the exception of DC resistance specification, where the substitute part offers improved performance at 90 mOhm maximum compared to the 117 mOhm maximum of the original part. This represents a reduction in resistive losses and is compatible with circuit designs specified for the CB2518T2R2M.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: The LSQNA251818T2R2M is the appropriate selection for new circuit designs. This part carries an active product status designation, ensuring ongoing manufacturer support, availability, and supply chain continuity. The LSQNA251818T2R2M meets all electrical, mechanical, and compliance requirements equivalent to the CB2518T2R2M while offering improved DC resistance performance.

For Existing Designs Using CB2518T2R2M: Direct substitution with LSQNA251818T2R2M is permissible. The lower DC resistance of the substitute part (90 mOhm versus 117 mOhm maximum) results in reduced power dissipation and improved thermal performance. No circuit redesign is required.

Compliance Considerations: Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating. Both are suitable for applications requiring environmental compliance across industrial and commercial temperature ranges.

Packaging Consideration: The CB2518T2R2M is supplied in Cut Tape (CT) & Digi-Reel® format, while the LSQNA251818T2R2M is supplied in Tape & Reel (TR) format. Procurement and assembly processes must account for this packaging difference.

Frequently Asked Questions (FAQ)

Q: Can the LSQNA251818T2R2M directly replace the CB2518T2R2M in existing circuit designs?

A: Yes. The LSQNA251818T2R2M is electrically and mechanically equivalent to the CB2518T2R2M across all critical parameters including inductance, current rating, saturation current, operating temperature range, and package dimensions. The substitute part features lower DC resistance, which improves circuit performance without requiring design modifications.

Q: What is the significance of the "Not For New Designs" status on the CB2518T2R2M?

A: This designation indicates that Taiyo Yuden has transitioned the CB2518T2R2M to end-of-life status and is no longer recommending its use in new product development. The LSQNA251818T2R2M, with active product status, is the recommended alternative for new designs to ensure long-term supply availability and manufacturer support.

Q: Are there differences in DC resistance between these parts, and does this affect circuit performance?

A: The CB2518T2R2M specifies a maximum DC resistance of 117 mOhm, while the LSQNA251818T2R2M specifies 90 mOhm maximum. The lower resistance of the substitute part reduces resistive losses and power dissipation in the inductor. This represents improved performance and is compatible with circuits designed for the original part.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both the CB2518T2R2M and LSQNA251818T2R2M are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. Both operate across the identical temperature range of -40°C to 105°C.

Q: What packaging formats are available for these parts?

A: The CB2518T2R2M is supplied in Cut Tape (CT) & Digi-Reel® format. The LSQNA251818T2R2M is supplied in Tape & Reel (TR) format. Procurement specifications and assembly equipment compatibility must account for this packaging difference.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts share identical dimensions of 0.098" L x 0.071" W (2.50mm x 1.80mm) with a maximum seated height of 0.079" (2.00mm). Both use the 1007 (2518 Metric) package form factor and are surface mount components.

Q: Can the LSQNA251818T2R2M be used in high-frequency applications?

A: Yes. The LSQNA251818T2R2M maintains the same self-resonant frequency of 68 MHz and test frequency of 7.96 MHz as the CB2518T2R2M, making it suitable for identical high-frequency applications.