LTF3020T-150M-D Equivalent & Substitute Parts

Part Overview

The LTF3020T-150M-D is a 15 µH shielded drum core wirewound inductor manufactured by TDK Corporation, designed for surface mount applications requiring moderate current handling and low DC resistance. This component is classified as Active product status with full AEC-Q200 compliance and ROHS3 certification. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

LTF3020T-150M-D

TDK CorporationIn Stock: 1835LTF3020T-150M-D Datasheet

Current PartRFQ

SRR4818A-150M

Bourns Inc.In Stock: 1776SRR4818A-150M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTF3020T-150M-D is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 15 µH (within ±20% tolerance band)
• Inductance tolerance: ±20%
• Core type: Ferrite drum core, shielded construction
• Mounting: Surface mount technology
• Operating temperature range: -40°C ~ 150°C minimum

Secondary Compatibility Factors:

• Current rating must equal or exceed 680 mA
• DC resistance must not exceed 380 mOhm
• AEC-Q200 compliance required
• ROHS3 compliance required
• Nonstandard package classification

The SRR4818A-150M qualifies as a substitute based on matching inductance, tolerance, core material, shielding, temperature range, and compliance certifications. The substitute demonstrates superior current handling (1.5 A vs. 680 mA) and lower DC resistance (220 mOhm vs. 380 mOhm), providing enhanced performance margin within the same functional category.

Parameter Comparison

Engineering Selection Recommendations

Both the LTF3020T-150M-D and SRR4818A-150M maintain Active product status with identical compliance certifications (AEC-Q200, ROHS3, REACH Unaffected). Selection between these components should be based on application-specific current requirements and thermal management considerations.

The LTF3020T-150M-D operates within its specified 680 mA current rating with a saturation current of 490 mA. The SRR4818A-150M provides increased current capacity (1.5 A rating, 870 mA saturation) and reduced DC resistance (220 mOhm vs. 380 mOhm), resulting in lower power dissipation and improved thermal performance.

Physical dimensions differ between the two components: LTF3020T-150M-D measures 4.50mm × 3.00mm, while SRR4818A-150M measures 4.80mm × 4.80mm. Both maintain identical height of 2.00mm maximum when seated. PCB layout and thermal design must accommodate these dimensional variations.

Frequently Asked Questions (FAQ)

Q: Can the SRR4818A-150M directly replace the LTF3020T-150M-D in existing designs?

A: Direct replacement is possible when PCB layout accommodates the larger footprint (4.80mm × 4.80mm vs. 4.50mm × 3.00mm). Electrical performance is compatible, as both components share identical inductance (15 µH), tolerance (±20%), operating temperature range (-40°C ~ 150°C), and compliance certifications. Mechanical clearance verification is required before implementation.

Q: What are the key differences in current handling between these inductors?

A: The LTF3020T-150M-D is rated for 680 mA continuous current with 490 mA saturation current. The SRR4818A-150M is rated for 1.5 A continuous current with 870 mA saturation current. Applications operating near or exceeding 680 mA should use the SRR4818A-150M to maintain adequate performance margin.

Q: How do DC resistance values affect component selection?

A: The LTF3020T-150M-D specifies 380 mOhm maximum DC resistance, while the SRR4818A-150M specifies 220 mOhm maximum. Lower DC resistance reduces power dissipation and heat generation. Applications with strict thermal budgets or high-frequency switching may benefit from the lower resistance of the SRR4818A-150M.

Q: Are both components suitable for automotive applications?

A: Yes. Both the LTF3020T-150M-D and SRR4818A-150M carry AEC-Q200 certification, qualifying them for automotive-grade applications within their specified operating parameters.

Q: What is the significance of the ±20% inductance tolerance?

A: The ±20% tolerance indicates that actual inductance values may range from 12 µH to 18 µH. Both components share this tolerance specification, ensuring equivalent inductance distribution characteristics for circuit design purposes.

Q: Do these components require different handling or storage procedures?

A: Both components are classified as Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during storage or handling. Standard ESD precautions for surface mount components apply to both parts.