CB2012T4R7M Equivalent & Substitute Parts

Part Overview

The CB2012T4R7M is a 4.7 µH unshielded drum core wirewound inductor manufactured by Taiyo Yuden, designed for surface mount applications in the 0805 (2012 Metric) package. This component is rated for 580 mA continuous current with a maximum DC resistance of 520 mOhm and operates across the temperature range of -40°C to 105°C. The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line.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 to ensure design continuity, maintain supply chain flexibility, and transition to active product status alternatives where applicable.

Substiute Parts

CB2012T4R7M

Taiyo YudenIn Stock: 32385CB2012T4R7M Datasheet

Current PartRFQ

LSQNA201212T4R7M

Taiyo YudenIn Stock: 904LSQNA201212T4R7M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CB2012T4R7M is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 4.7 µH
• Inductance tolerance: ±20%
• Current rating: 580 mA minimum
• Package / Case: 0805 (2012 Metric)
• Mounting type: Surface Mount
• Core material: Ferrite
• Shielding configuration: Unshielded
• Operating temperature range: -40°C to 105°C minimum

Allowable Variation Parameters:

• DC Resistance (DCR): Substitute parts must not exceed the maximum DCR specification of the main part to ensure thermal performance and circuit behavior remain within design tolerances
• Current - Saturation (Isat): Must meet or exceed the specified saturation current
• Self-resonant frequency: Must be within the specified range

The LSQNA201212T4R7M from Taiyo Yuden meets all mandatory matching parameters and represents a direct functional equivalent with improved DC resistance characteristics (400 mOhm versus 520 mOhm maximum).

Parameter Comparison

Engineering Selection Recommendations

The LSQNA201212T4R7M is the direct equivalent substitute for the CB2012T4R7M. Both components are manufactured by Taiyo Yuden and share identical electrical and mechanical specifications across all critical parameters. The substitute part offers the following advantages:

Product Status: The LSQNA201212T4R7M carries an "Active" product status, whereas the CB2012T4R7M is designated "Not For New Designs." This distinction indicates that the LSQNA series represents the current manufacturing line and ensures long-term availability and supply chain stability.

DC Resistance Improvement: The LSQNA201212T4R7M features a DC resistance of 400 mOhm, which is lower than the CB2012T4R7M maximum specification of 520 mOhm. This improvement reduces power dissipation and thermal generation in the inductor, resulting in enhanced thermal performance without compromising any other electrical characteristics.

Compliance and Certifications: Both parts maintain identical RoHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across applications. Moisture sensitivity level remains at MSL 1 (Unlimited) for both variants.

Pin-Compatible Replacement: The LSQNA201212T4R7M is a direct pin-compatible replacement suitable for PCB layouts designed for the CB2012T4R7M without requiring design modifications.

Frequently Asked Questions (FAQ)

Q: Can the LSQNA201212T4R7M be used as a direct replacement for the CB2012T4R7M in existing designs?

A: Yes. The LSQNA201212T4R7M is a direct functional and mechanical equivalent. Both components share identical inductance values, current ratings, package dimensions, and operating temperature ranges. The substitute part is pin-compatible and requires no PCB layout modifications.

Q: What is the significance of the "Not For New Designs" status on the CB2012T4R7M?

A: This designation indicates that the CB2012T4R7M has been superseded by newer product lines within the manufacturer's portfolio. The LSQNA201212T4R7M represents the active equivalent in the current product offering. For new designs, the LSQNA series is the recommended selection to ensure long-term component availability and manufacturing support.

Q: How does the lower DC resistance of the LSQNA201212T4R7M affect circuit performance?

A: The LSQNA201212T4R7M has a DC resistance of 400 mOhm compared to the CB2012T4R7M maximum of 520 mOhm. Lower DC resistance reduces resistive losses and heat generation during operation. This improvement is beneficial for thermal management and power efficiency, with no negative impact on circuit functionality.

Q: Are there any differences in the package or mounting requirements between these two parts?

A: No. Both the CB2012T4R7M and LSQNA201212T4R7M use the 0805 (2012 Metric) surface mount package with identical physical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) and a maximum seated height of 0.057" (1.45mm). They are fully interchangeable from a PCB assembly perspective.

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

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and carry an MSL rating of 1 (Unlimited). They meet identical environmental and regulatory requirements for use in commercial and industrial applications.

Q: What is the saturation current specification, and is it the same for both parts?

A: The saturation current (Isat) is specified at 300 mA for both the CB2012T4R7M and LSQNA201212T4R7M. This parameter defines the current level at which the inductor begins to exhibit nonlinear behavior due to core saturation. Both parts maintain identical saturation characteristics.

Q: Is the self-resonant frequency the same for both inductors?

A: Yes. Both the CB2012T4R7M and LSQNA201212T4R7M have a self-resonant frequency of 45 MHz. This parameter is critical for high-frequency applications and remains unchanged between the two parts.