SPD127-823M: Equivalent & Substitute Parts Reference

Part Overview

The SPD127-823M is an 82 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.9 A continuous current with a maximum DC resistance of 170 mOhm. This component is classified as obsolete, necessitating the identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part operates across an industrial temperature range of -55°C to 125°C and is configured for surface mount applications in nonstandard packaging.

Substiute Parts

SPD127-823M

API Delevan Inc.In Stock: 873SPD127-823M Datasheet

Current PartRFQ

HRSPD127-823M

API Delevan Inc.In Stock: 1357HRSPD127-823M Datasheet

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DR127-820-R

Eaton - Electronics DivisionIn Stock: 1389DR127-820-R Datasheet

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SRR1208-820YL

Bourns Inc.In Stock: 1760SRR1208-820YL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD127-823M is determined by compliance with the following critical parameters:

• Inductance Value: Exact match at 82 µH
• Inductance Tolerance: ±20% maximum allowed variation
• Core Material: Ferrite shielded construction required
• Mounting Type: Surface mount configuration mandatory
• DC Resistance: Must not exceed 170 mOhm to maintain circuit performance characteristics
• Current Rating: Minimum 1.9 A continuous current capacity
• Operating Temperature Range: Must encompass or equal -55°C to 125°C minimum

All three substitute parts meet the inductance value, tolerance, core material, and mounting type requirements. However, electrical and thermal characteristics vary, affecting suitability based on specific application demands.

Parameter Comparison

Engineering Selection Recommendations

HRSPD127-823M (API Delevan Inc.)

This part is the closest electrical equivalent, manufactured by the same supplier as the original. It exhibits lower DC resistance (166 mOhm) and an extended operating temperature range to 130°C. However, the current rating is slightly reduced to 1.8 A, which falls below the original 1.9 A specification. The part remains RoHS non-compliant. Selection of this part is appropriate when supplier continuity and minimal performance deviation are priorities, provided the application current requirement does not exceed 1.8 A.

DR127-820-R (Eaton - Electronics Division)

This part offers the highest current rating at 2.09 A and the lowest DC resistance at 143 mOhm, providing superior electrical performance. It is ROHS3 compliant and maintains MSL 1 rating. The operating temperature range extends only to 125°C, matching the original specification minimum. Physical dimensions increase slightly (12.50mm x 12.50mm), and the height remains at 8.00mm, matching the original footprint height. Selection is appropriate for applications requiring enhanced current capacity and environmental compliance.

SRR1208-820YL (Bourns Inc.)

This part presents the tightest inductance tolerance at ±15% and offers ROHS3 compliance. DC resistance is specified at 150 mOhm, and saturation current is 2.3 A. The current rating of 1.6 A is the lowest among all options and falls short of the original 1.9 A requirement. Physical dimensions are the largest (12.70mm x 12.70mm, 8.50mm height), potentially affecting PCB layout compatibility. Selection is appropriate for applications with reduced current requirements and where tighter inductance tolerance is beneficial.

Frequently Asked Questions (FAQ)

Q: Can HRSPD127-823M directly replace SPD127-823M in all applications?

A: HRSPD127-823M is electrically suitable for applications operating at 1.8 A or below. If the circuit demands the full 1.9 A specification of the original part, this substitute does not meet the requirement. The inductance value, tolerance, core material, and operating temperature range are compatible with most standard applications.

Q: What are the implications of using DR127-820-R?

A: DR127-820-R offers superior performance with lower DC resistance and higher current rating. Its ROHS3 compliance meets modern environmental standards. The operating temperature range is -40°C to 125°C; applications requiring operation below -40°C cannot use this part. Physical dimensions are slightly larger, requiring verification of PCB layout constraints.

Q: Why does SRR1208-820YL have a lower current rating despite being from an established manufacturer?

A: Current rating is determined by the core material, wire gauge, and thermal design of the inductor. The SRR1208-820YL is optimized for a lower current range while maintaining the specified inductance value and achieving tighter tolerance. Its 1.6 A rating is insufficient for the original 1.9 A specification.

Q: Are there package or form factor compatibility concerns?

A: All parts are configured for surface mount applications in nonstandard packaging. Physical dimensions vary slightly: the original is 12.00mm x 12.00mm, while substitutes range from 12.07mm to 12.70mm in length and width. Height variations range from 8.00mm to 9.02mm. PCB footprint and clearance verification is required prior to part substitution.

Q: What is the significance of inductance test frequency differences?

A: The original SPD127-823M is tested at 1 kHz, while DR127-820-R and HRSPD127-823M are tested at 100 kHz. Inductance values can vary slightly with frequency. Both test frequencies are standard for this component class; the 82 µH specification remains valid across these measurement conditions for practical circuit applications.

Q: Which substitute offers the best overall compliance profile?

A: DR127-820-R and SRR1208-820YL both achieve ROHS3 compliance, meeting RoHS3 regulatory requirements. Both carry MSL 1 rating, indicating unlimited moisture sensitivity protection. The original SPD127-823M and HRSPD127-823M do not meet modern RoHS standards. Selection depends on whether compliance is mandated for the application.