SPD125-474M Equivalent & Substitute Parts

Part Overview

The SPD125-474M is a 470 µH shielded surface mount inductor manufactured by API Delevan Inc., rated for 600 mA with a maximum DC resistance of 820mOhm. This component features a ferrite core and operates across the temperature range of -55°C to 125°C. The part is currently classified as obsolete, making identification of equivalent substitutes necessary for ongoing design support and procurement continuity.

Substiute Parts

SPD125-474M

API Delevan Inc.In Stock: 872SPD125-474M Datasheet

Current PartRFQ

B82477G2474M000

EPCOS - TDK ElectronicsIn Stock: 1497B82477G2474M000 Datasheet

SimilarRFQ

SRR1206-471KL

Bourns Inc.In Stock: 2233SRR1206-471KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPD125-474M is determined by the following critical parameters:

• Inductance Value: 470 µH (primary electrical requirement)
• Current Rating: Minimum 600 mA (functional requirement for circuit operation)
• DC Resistance: Maximum 820mOhm (power dissipation and efficiency constraint)
• Shielding: Shielded configuration (electromagnetic compatibility requirement)
• Core Material: Ferrite (magnetic performance and frequency response)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Operating Temperature Range: -55°C ~ 125°C (environmental specification)
• Package Footprint: 12.00mm x 12.00mm nominal (physical fit on PCB)

The identified substitute parts maintain the core inductance value and shielded ferrite construction while operating within acceptable parameter tolerances for this application category.

Parameter Comparison

Engineering Selection Recommendations

B82477G2474M000 (EPCOS - TDK Electronics)

This substitute maintains identical inductance and tolerance specifications with a current rating of 580 mA, representing a 3.3% reduction from the original 600 mA specification. The DC resistance of 770mOhm is lower than the original 820mOhm maximum, providing improved efficiency. The part is ROHS3 compliant and currently in active production status with 1440 units available in inventory. Physical dimensions are marginally larger (12.30mm vs 12.00mm), requiring PCB layout verification. Operating temperature range matches the original specification.

SRR1206-471KL (Bourns Inc.)

This substitute provides tighter inductance tolerance (±10% vs ±20%), offering improved consistency for precision applications. The current rating of 500 mA represents a 16.7% reduction from the original specification and is the limiting factor for this substitute. DC resistance of 970mOhm exceeds the original maximum by 18.3%, resulting in higher power dissipation. The part is ROHS3 compliant and in active production with 2123 units available. Physical dimensions are larger (12.70mm x 12.70mm with 6.50mm height), requiring PCB layout verification. Operating temperature range is reduced to -40°C minimum, narrowing the lower temperature boundary by 15°C.

Frequently Asked Questions (FAQ)

Q: Can B82477G2474M000 directly replace SPD125-474M in all applications?

A: B82477G2474M000 is suitable for applications where the circuit current requirement does not exceed 580 mA. The 20 mA reduction in current rating must be evaluated against actual circuit operating conditions. Physical dimensions are slightly larger, requiring PCB layout confirmation. Both parts maintain identical inductance values and operating temperature ranges.

Q: What are the limitations of SRR1206-471KL as a substitute?

A: SRR1206-471KL has two primary constraints: current rating of 500 mA (100 mA below the original specification) and operating temperature minimum of -40°C (versus -55°C for the original). These parameters must be evaluated against application requirements. The higher DC resistance of 970mOhm will increase power dissipation compared to the original 820mOhm specification.

Q: How do physical dimension differences affect PCB compatibility?

A: The original SPD125-474M measures 12.00mm x 12.00mm with 6.00mm maximum height. B82477G2474M000 is 12.30mm x 12.30mm with 6.00mm height, and SRR1206-471KL is 12.70mm x 12.70mm with 6.50mm height. PCB footprint and clearance requirements must be verified before component selection, particularly for high-density layouts or applications with height constraints.

Q: What is the significance of RoHS compliance status?

A: The original SPD125-474M is RoHS non-compliant. Both substitute parts (B82477G2474M000 and SRR1206-471KL) are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and procurement in regulated markets.

Q: How do inductance tolerance differences impact circuit performance?

A: SPD125-474M and B82477G2474M000 both specify ±20% tolerance, while SRR1206-471KL specifies ±10% tolerance. Tighter tolerance provides improved consistency across production batches. Circuit designs sensitive to inductance variation should prioritize SRR1206-471KL for enhanced performance predictability, provided current and temperature requirements are satisfied.