SPD74-124M Equivalent & Substitute Parts

Part Overview

The SPD74-124M is a 120 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 840 mA continuous current with a maximum DC resistance of 660 mOhm. This component operates across the temperature range of -55°C to 125°C and is designed for surface mount applications in nonstandard package configurations.

The SPD74-124M is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductor specification.

Substiute Parts

SPD74-124M

API Delevan Inc.In Stock: 1105SPD74-124M Datasheet

Current PartRFQ

HRSPD74-124M

API Delevan Inc.In Stock: 817HRSPD74-124M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD74-124M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 120 µH (exact match required)
• Inductance tolerance: ±20% (matching tolerance band)
• Core material: Ferrite (shielded construction)
• Shielding: Shielded configuration
• Mounting type: Surface Mount
• Package classification: Nonstandard

Secondary Compatibility Factors:

• Current rating: Substitute must support minimum 840 mA continuous current
• DC resistance: Substitute DCR must not exceed 660 mOhm maximum
• Operating temperature range: Substitute must cover or exceed -55°C to 125°C
• Manufacturer: API Delevan Inc. (same manufacturer preferred for consistency)

The HRSPD74-124M meets the primary matching criteria for inductance, tolerance, core material, shielding, and mounting type. However, the current rating of the HRSPD74-124M (520 mA) is lower than the SPD74-124M (840 mA), which represents a functional limitation in this substitution relationship.

Parameter Comparison

Engineering Selection Recommendations

SPD74-124M (Main Part):

• Product Status: Obsolete
• RoHS Compliance: Non-compliant
• Current Inventory: 1095 pieces available
• Suitable for: Legacy system maintenance, existing stock utilization where current capacity of 840 mA is required

HRSPD74-124M (Substitute Part):

• Product Status: Active
• RoHS Compliance: Non-compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• Current Inventory: 775 pieces available
• Suitable for: New designs, ongoing production where current capacity of 520 mA is sufficient

Selection between these parts depends on application current requirements. The HRSPD74-124M offers the advantage of active product status and extended operating temperature range (130°C maximum versus 125°C). However, the reduced current rating of 520 mA versus 840 mA must be evaluated against circuit requirements. Both parts share identical inductance, tolerance, core material, shielding, and mounting characteristics.

Frequently Asked Questions (FAQ)

Q: Can HRSPD74-124M directly replace SPD74-124M in existing designs?

A: Direct replacement is possible only if the application circuit operates at or below 520 mA continuous current. The SPD74-124M supports 840 mA, while HRSPD74-124M supports 520 mA. If the design requires the full 840 mA capacity, HRSPD74-124M is not suitable as a substitute.

Q: What are the physical dimension differences between these parts?

A: SPD74-124M dimensions are 0.287" L × 0.287" W × 0.185" H (7.30mm × 7.30mm × 4.70mm). HRSPD74-124M dimensions are 0.290" L × 0.290" W × 0.198" H (7.37mm × 7.37mm × 5.03mm). Both are nonstandard packages with minimal dimensional variation.

Q: Are there differences in DC resistance between these inductors?

A: SPD74-124M specifies 660 mOhm maximum DC resistance. HRSPD74-124M specifies 650 mOhm maximum DC resistance. The HRSPD74-124M exhibits slightly lower DC resistance, which is compatible with the SPD74-124M specification.

Q: What is the significance of the different inductance test frequencies?

A: SPD74-124M inductance is tested at 1 kHz. HRSPD74-124M inductance is tested at 10 kHz. Both parts maintain the same 120 µH inductance value at their respective test frequencies. The test frequency difference reflects measurement methodology and does not affect substitution compatibility for the specified inductance value.

Q: How do the packaging formats differ?

A: SPD74-124M packaging is listed as standard component format. HRSPD74-124M is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. Both use nonstandard package case types.

Q: What is the moisture sensitivity level of SPD74-124M?

A: The SPD74-124M moisture sensitivity level is not specified in the provided data. HRSPD74-124M specifies MSL 1 (Unlimited), indicating no moisture sensitivity restrictions.