SPD74-105M Equivalent & Substitute Parts

Part Overview

The SPD74-105M is a 1 mH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 280 mA maximum current with 6 Ohm DC resistance. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part operates across the temperature range of -55°C to 125°C and is designed for surface mount applications in nonstandard packaging.

Substiute Parts

SPD74-105M

API Delevan Inc.In Stock: 1148SPD74-105M Datasheet

Current PartRFQ

HRSPD74-105M

API Delevan Inc.In Stock: 906HRSPD74-105M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD74-105M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 1 mH (exact match required)
• Inductance tolerance: ±20% (must be identical or tighter)
• Core material: Ferrite (must match for electromagnetic performance)
• Shielding: Shielded (must be maintained)
• Mounting type: Surface Mount (must be compatible)

Secondary Compatibility Factors:

• Current rating must equal or exceed the application requirement
• DC resistance must be within acceptable limits for the circuit design
• Operating temperature range must cover the application environment
• Physical dimensions must accommodate the PCB layout constraints

The HRSPD74-105M qualifies as a substitute based on matching inductance (1 mH), tolerance (±20%), core material (ferrite), shielding (shielded), and surface mount configuration. However, the substitute exhibits reduced current rating (170 mA versus 280 mA) and lower DC resistance (5 Ohm Max versus 6 Ohm Max), requiring circuit-level verification before implementation.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Product Status

The SPD74-105M is classified as obsolete. The HRSPD74-105M is an active product from the same manufacturer (API Delevan Inc.) and same series family (SPD74/HRSPD74), making it the appropriate substitute for ongoing procurement and design updates.

Current Rating Limitation

The HRSPD74-105M has a maximum current rating of 170 mA, compared to the SPD74-105M's 280 mA rating. Applications requiring sustained currents above 170 mA cannot use this substitute without additional circuit analysis and thermal management verification.

DC Resistance Advantage

The HRSPD74-105M exhibits lower DC resistance (5 Ohm Max versus 6 Ohm Max), resulting in reduced power dissipation and improved efficiency in current-limited applications.

Temperature Range Extension

The HRSPD74-105M supports an extended upper operating temperature of 130°C (versus 125°C), providing additional thermal margin for high-temperature environments.

Physical Dimension Variance

The substitute part exhibits slightly larger footprint dimensions (0.290" x 0.290" versus 0.287" x 0.287") and increased height (0.198" versus 0.185"). PCB layout verification is required to confirm clearance compatibility.

Compliance Status

Both parts are RoHS non-compliant and REACH unaffected. The HRSPD74-105M includes moisture sensitivity level (MSL) rating of 1 (Unlimited), indicating superior moisture handling characteristics.

Frequently Asked Questions (FAQ)

Q: Can the HRSPD74-105M directly replace the SPD74-105M in all applications?

A: Direct replacement is possible only when the application current requirement does not exceed 170 mA. The SPD74-105M supports 280 mA, while the HRSPD74-105M is rated for 170 mA maximum. Circuit-level analysis is required to confirm current compatibility.

Q: What is the impact of the different inductance test frequencies (1 kHz versus 10 kHz)?

A: The SPD74-105M inductance is measured at 1 kHz, while the HRSPD74-105M is measured at 10 kHz. Both parts maintain the same 1 mH nominal inductance value with ±20% tolerance. The test frequency difference reflects different measurement standards but does not affect the core inductance specification.

Q: Are the physical dimension differences significant for PCB layout?

A: The HRSPD74-105M is slightly larger in footprint (0.290" x 0.290" versus 0.287" x 0.287") and taller (0.198" versus 0.185"). These differences are approximately 1% in lateral dimensions and 7% in height. PCB layout verification is necessary to confirm clearance with adjacent components and solder mask openings.

Q: What does the MSL rating of 1 (Unlimited) on the HRSPD74-105M indicate?

A: MSL 1 (Unlimited) indicates that the HRSPD74-105M has no moisture sensitivity restrictions and does not require special moisture control during storage, handling, or assembly. This represents an improvement over components with higher MSL ratings.

Q: How does the lower DC resistance of the HRSPD74-105M affect circuit performance?

A: The HRSPD74-105M's 5 Ohm Max DC resistance (versus 6 Ohm Max) results in lower resistive losses and reduced heat generation during operation. This is advantageous for efficiency-critical applications, provided the current rating of 170 mA is not exceeded.

Q: Is the extended temperature range of the HRSPD74-105M (-55°C to 130°C) a significant advantage?

A: The 5°C extension of the upper temperature limit (130°C versus 125°C) provides additional thermal margin for applications operating near the maximum temperature boundary. This is beneficial for high-temperature environments but not critical for standard industrial applications.

Q: What is the packaging difference between these parts?

A: The SPD74-105M packaging is listed as nonstandard with no specified supplier device package. The HRSPD74-105M is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes and provides better handling and storage characteristics.