Equivalent & Substitute Parts for DR127-1R5

Part Overview

The DR127-1R5 is a 1.5 µH shielded drum core, wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 13.5 A continuous current with a DC resistance of 3.41 mOhm and operates across the temperature range of -40°C to 125°C. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

DR127-1R5

Eaton - Electronics DivisionIn Stock: 1192DR127-1R5 Datasheet

Current PartRFQ

DR127-1R5-R

Eaton - Electronics DivisionIn Stock: 2549DR127-1R5-R Datasheet

DirectRFQ

SLF12575T-1R2N8R2-PF

TDK CorporationIn Stock: 1344SLF12575T-1R2N8R2-PF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DR127-1R5 are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalent (Identical Electrical Specifications): The DR127-1R5-R maintains all electrical parameters of the original part: 1.5 µH inductance, 13.5 A current rating, 3.41 mOhm DCR, and 31.1 A saturation current. This part differs only in packaging format (Tape & Reel) and product status (Active vs. Obsolete), making it a direct functional replacement.

Similar Substitute (Reduced Performance Parameters): The SLF12575T-1R2N8R2-PF from TDK Corporation operates within the same physical footprint and core technology but with reduced electrical ratings. This part is classified as a similar substitute due to lower inductance (1.2 µH vs. 1.5 µH), reduced current rating (8.2 A vs. 13.5 A), higher DCR (8.3 mOhm vs. 3.41 mOhm), and lower saturation current (13 A vs. 31.1 A). Substitution with this part requires circuit-level validation to confirm performance adequacy.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The DR127-1R5-R is the primary recommended substitute. It provides identical electrical performance across all critical parameters: inductance, current rating, saturation current, and DC resistance. The part is currently in active production status with ROHS3 compliance, addressing the regulatory limitations of the obsolete original part. The only functional difference is packaging format (Tape & Reel vs. bulk), which affects procurement and assembly processes but not electrical performance.

For Constrained Applications: The SLF12575T-1R2N8R2-PF may be considered only when circuit requirements permit reduced performance specifications. This part is marked "Not For New Designs" by the manufacturer, indicating limited long-term availability. The reduced current rating (8.2 A vs. 13.5 A), lower saturation current (13 A vs. 31.1 A), and higher DCR (8.3 mOhm vs. 3.41 mOhm) require circuit validation to confirm thermal and performance margins remain acceptable. The reduced operating temperature maximum (105°C vs. 125°C) further restricts application scope.

Compliance Considerations: The original DR127-1R5 is RoHS non-compliant. Both substitute parts achieve ROHS3 compliance, supporting modern procurement and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can the DR127-1R5-R be used as a direct replacement for the DR127-1R5?

A: Yes. The DR127-1R5-R is electrically and mechanically identical to the DR127-1R5. Both parts maintain 1.5 µH inductance, 13.5 A current rating, 3.41 mOhm DCR, and 31.1 A saturation current. The primary difference is packaging format (Tape & Reel vs. bulk) and product status (Active vs. Obsolete). No circuit modifications are required.

Q: What are the limitations of using the SLF12575T-1R2N8R2-PF as a substitute?

A: The SLF12575T-1R2N8R2-PF has reduced electrical ratings: 1.2 µH inductance (vs. 1.5 µH), 8.2 A current rating (vs. 13.5 A), 8.3 mOhm DCR (vs. 3.41 mOhm), and 13 A saturation current (vs. 31.1 A). Additionally, the maximum operating temperature is 105°C versus 125°C. This part is marked "Not For New Designs," indicating limited future availability. Substitution requires circuit-level analysis to confirm performance adequacy under all operating conditions.

Q: Are the physical dimensions compatible across all three parts?

A: The footprint dimensions are identical: 12.50 mm x 12.50 mm. Maximum seated heights are 8.00 mm (DR127-1R5 and DR127-1R5-R) and 7.85 mm (SLF12575T-1R2N8R2-PF). All parts are surface mount components suitable for the same PCB layout.

Q: What is the difference between the DR127-1R5 and DR127-1R5-R packaging?

A: The DR127-1R5 is supplied in bulk packaging, while the DR127-1R5-R is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes. Both parts are electrically identical.

Q: Why is the SLF12575T-1R2N8R2-PF marked "Not For New Designs"?

A: This designation indicates the manufacturer (TDK Corporation) does not recommend this part for new circuit designs. It may have limited production continuity or represents an older product line. While the part may be available for existing designs, long-term supply cannot be guaranteed.

Q: Does the tolerance difference between parts affect substitution?

A: The DR127-1R5 and DR127-1R5-R both have ±20% tolerance, while the SLF12575T-1R2N8R2-PF has ±30% tolerance. The wider tolerance of the TDK part may impact circuit performance in applications with tight inductance requirements. Circuit design margins must account for this increased tolerance range.