SPD127R-103M Equivalent & Substitute Parts

Part Overview

The SPD127R-103M is a 10 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications requiring moderate current handling and low DC resistance. This component is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. Alternative equivalent parts are identified when original stock availability is limited, when specific packaging formats are required, or when application-specific performance parameters necessitate component substitution within the same electrical and mechanical classification.

Substiute Parts

SPD127R-103M

API Delevan Inc.In Stock: 827SPD127R-103M Datasheet

Current PartRFQ

SRR1208-100ML

Bourns Inc.In Stock: 3676SRR1208-100ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD127R-103M is determined by strict alignment of the following critical parameters:

Primary Electrical Parameters:

• Inductance value: 10 µH (exact match required)
• Inductance tolerance: ±20% (matching tolerance band)
• Current rating: minimum 5.4 A continuous capability
• DC resistance: maximum 40 mOhm (lower values acceptable)

Primary Mechanical Parameters:

• Core type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration
• Mounting: Surface mount technology
• Package classification: Nonstandard form factor

Compliance Parameters:

• RoHS3 compliance required
• Operating temperature range: minimum -55°C ~ 125°C coverage
• Moisture sensitivity: MSL 1 classification

The substitute part SRR1208-100ML from Bourns Inc. meets all primary electrical requirements with equivalent inductance, matching tolerance, and exceeding current saturation capability. DC resistance is superior (21 mOhm vs. 40 mOhm maximum). Mechanical compatibility is confirmed through identical core type, shielding, and surface mount configuration. Compliance certifications align with RoHS3 and REACH requirements. Packaging format differs (Cut Tape & Digi-Reel vs. Tape & Reel) but does not affect functional substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (SPD127R-103M): Select the SPD127R-103M when the application requires the extended lower temperature operating range of -55°C minimum. This part is Active status with full inventory availability (727 pcs). RoHS3 compliance and REACH unaffected status confirm regulatory alignment for industrial and commercial applications.

Substitute Part Selection (SRR1208-100ML): Select the SRR1208-100ML when lower DC resistance is advantageous for thermal management or efficiency optimization. The 21 mOhm maximum DCR represents a 47.5% reduction compared to the primary part specification. Higher saturation current (6.7 A vs. 5.4 A) provides additional margin for transient conditions. This part is Active status with higher inventory availability (3641 pcs). RoHS3 compliance and REACH unaffected status confirm equivalent regulatory standing. Substitute selection is appropriate when operating temperature minimum of -40°C satisfies application requirements.

Mechanical Considerations: Both parts are surface mount, shielded drum core inductors with nonstandard package classifications. Dimensional variations (12.00mm vs. 12.70mm length/width, 8.00mm vs. 8.50mm height) require PCB layout verification. Packaging format difference (Tape & Reel vs. Cut Tape & Digi-Reel) affects procurement and assembly processes but does not impact functional performance.

Frequently Asked Questions (FAQ)

Q: Can SRR1208-100ML directly replace SPD127R-103M in all applications?

A: Substitution is valid when the application operating temperature minimum is -40°C or higher. If the circuit requires -55°C operation, the SPD127R-103M is required. All other electrical parameters (inductance, tolerance, current handling, DC resistance) support direct substitution.

Q: What is the significance of the lower DC resistance in the SRR1208-100ML?

A: The SRR1208-100ML exhibits 21 mOhm maximum DCR compared to 40 mOhm maximum for the SPD127R-103M. Lower DC resistance reduces resistive losses and heat generation during operation. This characteristic is beneficial in high-current or efficiency-critical applications but does not affect inductance performance.

Q: Are the dimensional differences between these parts critical?

A: The SRR1208-100ML is 0.70mm larger in length and width (12.70mm vs. 12.00mm) and 0.50mm taller (8.50mm vs. 8.00mm). PCB layout and component placement must accommodate these variations. Verify available board space before substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SPD127R-103M and SRR1208-100ML are RoHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity). Regulatory requirements are equivalent.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Tape & Reel is continuous reel packaging for automated assembly. Cut Tape & Digi-Reel is pre-cut tape format with optional reel availability. Both formats contain identical components; packaging selection depends on assembly equipment and procurement preferences.

Q: Which part should be selected for new design?

A: For new designs without -55°C requirement, SRR1208-100ML is preferred due to superior DC resistance characteristics, higher saturation current margin, and greater inventory availability. For designs requiring extended low-temperature operation, SPD127R-103M is mandatory.