SPD127-105M Equivalent & Substitute Parts Reference

Part Overview

The SPD127-105M is a 1 mH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 620 mA continuous current with a maximum DC resistance of 1.54 Ohm. This surface mount component operates across the temperature range of -55°C to 125°C and features ferrite core construction with ±20% inductance tolerance.

The SPD127-105M carries an obsolete product status. 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

SPD127-105M

API Delevan Inc.In Stock: 828SPD127-105M Datasheet

Current PartRFQ

HRSPD127-105M

API Delevan Inc.In Stock: 1098HRSPD127-105M Datasheet

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CDRH127/HPNP-102MC

Sumida America Components Inc.In Stock: 917CDRH127/HPNP-102MC Datasheet

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SRR1208-102KL

Bourns Inc.In Stock: 8688SRR1208-102KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD127-105M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 1 mH (exact match required)
• Core material: Ferrite (shielded construction)
• Mounting type: Surface Mount
• Shielding: Shielded configuration

Secondary Compatibility Factors:

• Current rating: Minimum 620 mA continuous current capability
• DC resistance: Maximum 1.54 Ohm (lower values acceptable)
• Operating temperature range: Minimum coverage of -55°C to 125°C
• Inductance tolerance: ±20% or tighter
• Physical footprint: Dimensions within acceptable assembly constraints

All three substitute parts meet the primary matching criteria. Variations in current saturation ratings, DC resistance values, and operating temperature upper limits are documented for engineering evaluation based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

HRSPD127-105M (API Delevan Inc.)

This substitute maintains API Delevan Inc. manufacturer continuity and shares identical inductance and tolerance specifications. The HRSPD127-105M is an active product with extended upper operating temperature of 130°C. Current rating is reduced to 550 mA, which represents a 70 mA reduction from the main part specification. DC resistance increases to 1.86 Ohm maximum. This part is suitable for applications where the 550 mA current rating is sufficient and the extended temperature range provides operational benefit. RoHS non-compliance status matches the main part.

CDRH127/HPNP-102MC (Sumida America Components Inc.)

This substitute provides exact current rating matching at 620 mA and maintains drum core wirewound construction. DC resistance is 1.61 Ohm maximum, representing a 0.07 Ohm increase. The saturation current rating of 880 mA provides additional margin. Operating temperature range is -40°C to 100°C, which does not extend to the -55°C lower limit of the main part. Physical dimensions are slightly larger at 12.50 x 12.50 x 8.00 mm. This part is active and available. Selection is appropriate for applications operating within the -40°C to 100°C range with 620 mA current requirements.

SRR1208-102KL (Bourns Inc.)

This substitute offers tighter inductance tolerance at ±10% compared to the ±20% specification of the main part. Current rating is 500 mA, representing a 120 mA reduction. DC resistance is 1.65 Ohm maximum. The SRR1208-102KL is ROHS3 compliant, providing regulatory advantage over the non-compliant main part. Operating temperature range of -40°C to 125°C covers the upper specification but not the -55°C lower limit. This part is active with highest inventory availability (8639 pcs). Selection is appropriate for applications requiring RoHS3 compliance and operating within -40°C to 125°C with 500 mA maximum current.

Frequently Asked Questions (FAQ)

Q: Can HRSPD127-105M replace SPD127-105M in all applications?

A: HRSPD127-105M is suitable for applications where continuous current does not exceed 550 mA. The 70 mA reduction in current rating must be evaluated against circuit requirements. All other electrical parameters are compatible. Physical dimensions are within 0.07 mm variance, acceptable for most assembly processes.

Q: What is the impact of increased DC resistance in substitute parts?

A: All substitute parts exhibit DC resistance increases ranging from 0.07 Ohm to 0.32 Ohm above the main part specification. Power dissipation increases proportionally with current squared. For 620 mA operation, the CDRH127/HPNP-102MC (1.61 Ohm) dissipates approximately 0.62 watts compared to 0.59 watts for the main part. Circuit thermal design must accommodate this increase.

Q: Which substitute part has the best regulatory compliance?

A: SRR1208-102KL is ROHS3 compliant, providing the highest regulatory status. HRSPD127-105M and the main part SPD127-105M are both RoHS non-compliant. CDRH127/HPNP-102MC compliance status is not specified in available documentation.

Q: Are physical dimension differences significant?

A: All substitute parts maintain the same 8.00 to 8.50 mm height range. Lateral dimensions vary from 12.00 mm to 12.70 mm. For standard PCB assembly with 0.5 mm pad spacing tolerance, these variations are within acceptable limits. Verify specific PCB layout constraints for critical applications.

Q: What is the operating temperature limitation for each substitute?

A: SPD127-105M operates -55°C to 125°C. HRSPD127-105M extends to 130°C upper limit but maintains -55°C lower limit. CDRH127/HPNP-102MC operates -40°C to 100°C, limiting both extremes. SRR1208-102KL operates -40°C to 125°C, matching upper limit but not lower limit. Application temperature requirements determine suitability.

Q: Can current saturation ratings be used to exceed continuous current ratings?

A: No. Continuous current ratings represent sustained operating conditions. Saturation current ratings indicate the current level at which inductance begins to degrade. Continuous operation must not exceed the specified current rating regardless of saturation rating.

Q: Which substitute offers the best availability?

A: SRR1208-102KL has the highest documented inventory at 8639 pieces. CDRH127/HPNP-102MC has 890 pieces available. HRSPD127-105M has 1087 pieces available. Availability should be verified with current suppliers for production requirements.