SPD74-153M Equivalent & Substitute Parts

Part Overview

The SPD74-153M is a 15 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 2.4 A with a maximum DC resistance of 81 mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 125°C and is mounted as a surface mount device in a nonstandard package measuring 7.30mm × 7.30mm.

Substiute Parts

SPD74-153M

API Delevan Inc.In Stock: 1206SPD74-153M Datasheet

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HRSPD74-153M

API Delevan Inc.In Stock: 918HRSPD74-153M Datasheet

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SCB75C-150

Signal TransformerIn Stock: 1207SCB75C-150 Datasheet

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SCRH74-150

Signal TransformerIn Stock: 917SCRH74-150 Datasheet

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SCRH74B-150

Signal TransformerIn Stock: 1139SCRH74B-150 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD74-153M is determined by the following critical parameters:

• Inductance Value: Must be 15 µH with ±20% tolerance
• Shielding: Must be shielded construction
• Current Rating: Must support minimum 2.4 A operation
• DC Resistance: Must not exceed 81 mOhm
• Mounting Type: Must be surface mount compatible
• Package Dimensions: Physical footprint must accommodate 7.30mm × 7.30mm base dimensions with height considerations for board clearance

The substitute parts listed below meet these core electrical and mechanical requirements, though variations in current saturation ratings, operating temperature ranges, and compliance certifications exist.

Parameter Comparison

Engineering Selection Recommendations

HRSPD74-153M (API Delevan Inc.): Active product status with identical inductance and tolerance specifications. Lower current rating of 1.4 A limits suitability for applications requiring the full 2.4 A capacity of the original SPD74-153M. Improved DC resistance of 70 mOhm provides lower losses. Extended operating temperature to 130°C offers thermal margin. RoHS non-compliant status matches the original part. Slightly larger footprint (7.37mm × 7.37mm) requires verification for board layout compatibility.

SCB75C-150 (Signal Transformer): Active product with current rating of 2.1 A, approaching the original 2.4 A specification. DC resistance of 80 mOhm is within acceptable range. ROHS3 compliance provides regulatory advantage for new designs. Larger footprint (7.40mm × 7.40mm) and increased height (5.50mm) require PCB layout verification. Operating temperature limited to -40°C to 125°C, reducing low-temperature margin compared to the original part.

SCRH74-150 and SCRH74B-150 (Signal Transformer): Both parts are electrically identical with 1.47 A current rating, 81 mOhm DCR, and ±20% tolerance. Current rating falls below the original 2.4 A specification, limiting use to lower-current applications. ROHS3 compliance and active product status support long-term availability. Larger footprint (7.80mm × 7.80mm) with lower profile (4.50mm height) may offer board layout advantages in space-constrained designs. Operating temperature range of -40°C to 125°C is narrower than the original part.

Frequently Asked Questions (FAQ)

Q: Can HRSPD74-153M directly replace SPD74-153M in all applications?

A: HRSPD74-153M matches the inductance and tolerance specifications but has a reduced current rating of 1.4 A versus 2.4 A. Direct substitution is only valid for applications where the circuit current does not exceed 1.4 A. Verify actual circuit current requirements before selection.

Q: What are the key differences between SCB75C-150 and SCRH74-150?

A: Both parts share the same 15 µH inductance and ±20% tolerance. SCB75C-150 offers higher current rating (2.1 A) and lower DCR (80 mOhm), making it more suitable for higher-current applications. SCRH74-150 has a larger footprint (7.80mm × 7.80mm) but lower profile (4.50mm). Manufacturer differs: SCB75C-150 is from Signal Transformer, while SCRH74-150 is also from Signal Transformer but in a different series.

Q: Are there RoHS compliance considerations for substitute selection?

A: The original SPD74-153M is RoHS non-compliant. SCB75C-150, SCRH74-150, and SCRH74B-150 are ROHS3 compliant, supporting regulatory requirements for new designs. HRSPD74-153M remains RoHS non-compliant. Select based on your design's compliance requirements.

Q: How do package dimension differences affect PCB layout?

A: The original SPD74-153M footprint is 7.30mm × 7.30mm with 4.70mm height. Substitute parts range from 7.37mm to 7.80mm in length and width, with heights from 4.50mm to 5.50mm. Verify that your PCB layout accommodates the larger footprints and heights, particularly in space-constrained areas or near adjacent components.

Q: Which substitute part is best for applications requiring the full 2.4 A current rating?

A: SCB75C-150 provides the closest match with a 2.1 A current rating. However, this remains below the original 2.4 A specification. For applications requiring the full 2.4 A capacity, circuit redesign or alternative inductor families may be necessary.

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

A: HRSPD74-153M is tested at 100 kHz, while all other parts are tested at 1 kHz. This difference reflects measurement methodology and does not affect the 15 µH nominal inductance value. Both test frequencies are standard industry practice for inductor characterization.