BRL2012T4R7M Equivalent & Substitute Parts

Part Overview

The BRL2012T4R7M is a 4.7 µH unshielded drum core wirewound inductor manufactured by Taiyo Yuden, rated for 400 mA continuous current with a maximum DC resistance of 715mOhm. The component is packaged in 0805 (2012 Metric) surface mount format and operates across the temperature range of -40°C to 105°C.

This part carries a "Not For New Designs" product status, indicating that Taiyo Yuden has discontinued active development and support for this model. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to actively supported alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

BRL2012T4R7M

Taiyo YudenIn Stock: 5051BRL2012T4R7M Datasheet

Current PartRFQ

LSQPB201210T4R7M

Taiyo YudenIn Stock: 1209LSQPB201210T4R7M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BRL2012T4R7M is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Inductance value: 4.7 µH with ±20% tolerance
• Current rating: 400 mA minimum
• Saturation current (Isat): 340 mA minimum
• DC resistance: 715 mOhm maximum
• Self-resonant frequency: 150 MHz minimum
• Operating temperature range: -40°C to 105°C minimum

Mechanical & Physical Specifications:

• Package format: 0805 (2012 Metric) surface mount
• Core material: Ferrite
• Shielding configuration: Unshielded
• Physical dimensions: 2.00mm L × 1.25mm W × 1.00mm H (seated maximum)

Compliance & Environmental:

• RoHS3 compliance required
• Moisture Sensitivity Level: 1 (Unlimited)

The LSQPB201210T4R7M qualifies as a direct substitute because it matches all electrical parameters, physical dimensions, core material, shielding type, and compliance certifications. The primary distinction is product status: LSQPB201210T4R7M is actively supported by Taiyo Yuden, whereas BRL2012T4R7M is not recommended for new designs.

Parameter Comparison

Engineering Selection Recommendations

The LSQPB201210T4R7M is the direct equivalent substitute for the BRL2012T4R7M based on complete electrical and mechanical parameter alignment. All critical specifications—inductance, current rating, saturation current, DC resistance, self-resonant frequency, operating temperature range, package dimensions, and compliance certifications—are identical between the two parts.

The primary advantage of selecting LSQPB201210T4R7M is its "Active" product status. This designation indicates that Taiyo Yuden continues to provide full technical support, maintains consistent manufacturing processes, and guarantees long-term supply availability. In contrast, the BRL2012T4R7M carries "Not For New Designs" status, signaling end-of-life management and potential supply discontinuation.

For applications currently using BRL2012T4R7M, direct substitution with LSQPB201210T4R7M requires no circuit redesign, PCB layout modification, or thermal management adjustment. The packaging difference (Cut Tape & Digi-Reel versus Tape & Reel) affects procurement and assembly logistics but does not impact electrical performance or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can LSQPB201210T4R7M be used as a direct replacement for BRL2012T4R7M in existing designs?

A: Yes. All electrical parameters, mechanical dimensions, core material, shielding configuration, and compliance certifications are identical. No circuit modifications are required.

Q: What is the difference between the two part numbers?

A: The BRL2012T4R7M belongs to the BR series and carries "Not For New Designs" status. The LSQPB201210T4R7M belongs to the LSQP series and is actively supported. Both are manufactured by Taiyo Yuden and meet identical specifications for 4.7 µH inductance, 400 mA current rating, and 0805 (2012 Metric) package format.

Q: Does the packaging format difference affect circuit performance?

A: No. The packaging format difference (Cut Tape & Digi-Reel versus Tape & Reel) is a procurement and assembly consideration only. It does not affect electrical performance, thermal characteristics, or mechanical fit on the PCB.

Q: Are both parts RoHS3 compliant?

A: Yes. Both BRL2012T4R7M and LSQPB201210T4R7M are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: What is the saturation current specification, and why is it important?

A: Both parts have a saturation current (Isat) of 340 mA. This specification defines the maximum current at which the inductor maintains its specified inductance value before magnetic saturation occurs. At currents exceeding this threshold, inductance degrades significantly.

Q: Can these inductors be used in high-frequency applications?

A: Both parts have a self-resonant frequency of 150 MHz, which defines the upper frequency limit for stable inductor behavior. Applications operating below this frequency are suitable for these components.

Q: What is the operating temperature range for these inductors?

A: Both parts operate across -40°C to 105°C. This range covers industrial and commercial temperature environments. Verify that your application's thermal profile remains within these limits.

Q: Why is the BRL2012T4R7M marked "Not For New Designs"?

A: This designation indicates that Taiyo Yuden has transitioned this part to end-of-life management. New designs should use the actively supported LSQPB201210T4R7M to ensure long-term supply availability and continued manufacturer support.