SPD127-104M Equivalent & Substitute Parts

Part Overview

The SPD127-104M is a 100 µH shielded drum core, wirewound inductor manufactured by API Delevan Inc., rated for 1.3 A with a maximum DC resistance of 210mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production 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 12.00mm x 12.00mm package.

Substiute Parts

SPD127-104M

API Delevan Inc.In Stock: 1076SPD127-104M Datasheet

Current PartRFQ

HRSPD127-104M

API Delevan Inc.In Stock: 1364HRSPD127-104M Datasheet

DirectRFQ

CDRH127/HPNP-101MC

Sumida America Components Inc.In Stock: 695CDRH127/HPNP-101MC Datasheet

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SCRH127-101

Signal TransformerIn Stock: 2600SCRH127-101 Datasheet

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SRR1208-101KL

Bourns Inc.In Stock: 5770SRR1208-101KL Datasheet

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SRR1208-101YL

Bourns Inc.In Stock: 4378SRR1208-101YL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPD127-104M are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 100 µH (exact match required)
• Inductance tolerance: ±20% or tighter
• Current rating: minimum 1.3 A
• DC resistance: 210mOhm or lower
• Shielding: Shielded configuration
• Core material: Ferrite
• Operating temperature range: must encompass or exceed -55°C to 125°C
• Mounting type: Surface Mount
• Package footprint: 12.00mm x 12.00mm nominal dimensions

All substitute parts listed meet these core electrical specifications. Variations in current saturation ratings, package height, and inductance test frequency do not disqualify substitution when primary parameters are satisfied.

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalent: HRSPD127-104M from API Delevan Inc. is the primary direct equivalent, offering improved current rating (1.7 A vs. 1.3 A), lower DC resistance (182mOhm vs. 210mOhm), and active product status. Operating temperature extends to 130°C. Package dimensions are nearly identical (12.07mm vs. 12.00mm). This part is supplied in Tape & Reel packaging with MSL 1 rating.

Active Substitute Options: All five substitute parts maintain the 100 µH inductance specification and shielded ferrite core configuration. Selection among CDRH127/HPNP-101MC, SCRH127-101, SRR1208-101KL, and SRR1208-101YL depends on specific design constraints:

• CDRH127/HPNP-101MC (Sumida) provides the highest current saturation rating (2.52 A) but operates only to 100°C maximum, which does not meet the full -55°C to 125°C requirement of the original part.
• SCRH127-101 (Signal Transformer) achieves 1.8 A current rating with 220mOhm DCR and operates to 125°C. RoHS3 compliance is confirmed.
• SRR1208-101KL and SRR1208-101YL (Bourns) both deliver 1.5 A current rating with superior 170mOhm DCR and tighter inductance tolerance (±10% and ±15% respectively). Both are RoHS3 compliant and operate to 125°C. Package footprint is slightly larger (12.70mm).

Compliance Considerations: The original SPD127-104M is RoHS non-compliant. SCRH127-101, SRR1208-101KL, and SRR1208-101YL are RoHS3 compliant. HRSPD127-104M and CDRH127/HPNP-101MC do not specify RoHS status. All parts are REACH unaffected or unspecified.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher current rating than the original SPD127-104M? A: Yes. All substitute parts listed have current ratings equal to or greater than 1.3 A. Higher current ratings provide design margin and do not compromise circuit function when inductance and DC resistance specifications are met.

Q: What is the impact of different package dimensions on PCB layout? A: The SPD127-104M footprint is 12.00mm x 12.00mm. HRSPD127-104M (12.07mm x 12.07mm) and CDRH127/HPNP-101MC and SCRH127-101 (12.50mm x 12.50mm) require minimal layout adjustment. SRR1208-101KL and SRR1208-101YL (12.70mm x 12.70mm) represent the largest footprint increase. Height variations (8.00mm to 9.02mm) may affect clearance in space-constrained designs.

Q: Does inductance test frequency affect substitution compatibility? A: Inductance test frequency is a measurement parameter, not an operational specification. The SPD127-104M is tested at 1 kHz; HRSPD127-104M is tested at 10 kHz. Both deliver 100 µH inductance at their respective test frequencies. Circuit performance depends on the inductance value at the operating frequency of your application, not the test frequency.

Q: Which substitute offers the best DC resistance performance? A: SRR1208-101KL and SRR1208-101YL both specify 170mOhm maximum DCR, representing a 19% improvement over the original 210mOhm specification. HRSPD127-104M offers 182mOhm (13% improvement). Lower DC resistance reduces power dissipation and heat generation.

Q: Are all substitute parts available in the same packaging format? A: No. The original SPD127-104M packaging is not specified. HRSPD127-104M is supplied in Tape & Reel. CDRH127/HPNP-101MC and SRR1208-101KL are supplied in Tape & Reel. SCRH127-101 is supplied in Cut Tape. SRR1208-101YL is supplied in Cut Tape & Digi-Reel. Verify packaging compatibility with your procurement and assembly processes.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings? A: All substitute parts specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Storage and handling requirements are minimal. This applies to HRSPD127-104M, CDRH127/HPNP-101MC, SCRH127-101, SRR1208-101KL, and SRR1208-101YL.

Q: Can I use CDRH127/HPNP-101MC if my circuit operates only to 100°C? A: Yes, if your maximum operating temperature does not exceed 100°C. However, the original SPD127-104M specifies operation to 125°C. CDRH127/HPNP-101MC does not meet this full temperature range requirement and should be used only when design constraints confirm operation within -40°C to 100°C limits.