ASPI-104S-470M-T Equivalent & Substitute Parts

Part Overview

The ASPI-104S-470M-T is a 47 µH shielded drum core wirewound inductor manufactured by Abracon LLC, designed for surface mount applications. This component is rated for 1.9 A continuous current with a maximum DC resistance of 135.6 mOhm and operates across the temperature range of -40°C to 85°C. The part is currently active in production and ROHS3 compliant.

Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while meeting the same functional requirements. The primary substitute listed is the DRA124-470-R from Eaton - Electronics Division, which shares the same inductance value, tolerance, and shielding characteristics.

Substiute Parts

ASPI-104S-470M-T

Abracon LLCIn Stock: 1341ASPI-104S-470M-T Datasheet

Current PartRFQ

DRA124-470-R

Eaton - Electronics DivisionIn Stock: 1276DRA124-470-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The DRA124-470-R qualifies as a direct substitute based on the following electrical and mechanical alignment:

Matching Parameters:

• Inductance value: 47 µH (identical)
• Inductance tolerance: ±20% (identical)
• Shielding classification: Shielded (identical)
• Mounting type: Surface Mount (identical)
• Inductance test frequency: 100 kHz (identical)
• RoHS compliance: ROHS3 Compliant (identical)
• Moisture sensitivity level: MSL 1 (identical)

Acceptable Variations:

• Current rating: 1.78 A (DRA124-470-R) versus 1.9 A (ASPI-104S-470M-T) — the substitute maintains sufficient current capacity for applications rated at or below 1.78 A
• DC resistance: 134 mOhm (DRA124-470-R) versus 135.6 mOhm (ASPI-104S-470M-T) — within acceptable tolerance for equivalent performance
• Saturation current: 2.91 A (DRA124-470-R) versus 2.1 A (ASPI-104S-470M-T) — higher saturation margin in substitute
• Operating temperature range: -40°C to 165°C (DRA124-470-R) versus -40°C to 85°C (ASPI-104S-470M-T) — extended upper temperature limit in substitute
• Physical dimensions: Slight variations in length, width, and height due to different core designs

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: DRA124-470-R

The DRA124-470-R is suitable as a direct substitute for the ASPI-104S-470M-T in applications where the following conditions are met:

• Circuit current requirements do not exceed 1.78 A continuous operation
• PCB layout accommodates the larger footprint (12.50 mm × 12.50 mm versus 10.10 mm × 10.00 mm)
• Extended operating temperature capability (-40°C to 165°C) is acceptable or beneficial
• Both parts maintain identical inductance specifications and shielding performance at 100 kHz test frequency

Both components carry active product status and full ROHS3 compliance, ensuring regulatory alignment and supply chain continuity. The DRA124-470-R includes AEC-Q200 automotive qualification, providing additional reliability assurance for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the DRA124-470-R replace the ASPI-104S-470M-T in all applications?

A: Substitution is valid when circuit current requirements remain at or below 1.78 A. The substitute's larger physical dimensions (12.50 mm × 12.50 mm) must be accommodated in the PCB layout. Both parts deliver identical inductance and shielding performance.

Q: What is the impact of the 0.12 mOhm difference in DC resistance?

A: The DC resistance difference (135.6 mOhm versus 134 mOhm) is negligible for most applications and falls within normal manufacturing tolerance bands for wirewound inductors. Power dissipation variation is minimal across typical operating currents.

Q: Does the DRA124-470-R's higher saturation current (2.91 A) provide any advantage?

A: The higher saturation current in the DRA124-470-R provides greater margin against core saturation. However, the primary current rating limitation remains 1.78 A for continuous operation, which is the controlling parameter for substitution eligibility.

Q: Are there any temperature-related considerations for substitution?

A: The DRA124-470-R operates to 165°C maximum, compared to 85°C for the ASPI-104S-470M-T. Applications operating within the original -40°C to 85°C range experience no thermal performance difference. Extended temperature capability in the substitute does not create compatibility issues.

Q: How do the physical dimension differences affect PCB design?

A: The DRA124-470-R requires a larger footprint area (12.50 mm × 12.50 mm versus 10.10 mm × 10.00 mm) and slightly greater height clearance (4.50 mm versus 4.00 mm). PCB layout must be verified to accommodate these dimensional variations before substitution.

Q: Are both parts equally available for procurement?

A: Both components are listed as active products with current inventory. Availability may vary by distributor and time period. Verify current stock status with your component supplier before finalizing design decisions.