SPD125R-473M Equivalent & Substitute Parts

Part Overview

The SPD125R-473M is a 47 µH shielded drum core wirewound inductor manufactured by API Delevan Inc., designed for surface mount applications requiring moderate current handling and low DC resistance. This component operates across the industrial temperature range of -55°C to 125°C and maintains active product status with ROHS3 compliance. Substitute parts are identified when equivalent inductance values, current ratings, and shielding characteristics align within acceptable tolerance and performance parameters, enabling design flexibility and supply chain continuity.

Substiute Parts

SPD125R-473M

API Delevan Inc.In Stock: 1168SPD125R-473M Datasheet

Current PartRFQ

SRR1206-470YL

Bourns Inc.In Stock: 1760SRR1206-470YL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPD125R-473M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 47 µH (exact match required)
• Core type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration
• Mounting: Surface mount technology
• Current handling capability: Minimum 1.6 A saturation current

Secondary Compatibility Factors:

• DC resistance within acceptable operating limits
• Tolerance specification (±15% to ±20%)
• Operating temperature range overlap
• Compliance certifications (ROHS3, REACH Unaffected)
• Package form factor compatibility

The SRR1206-470YL from Bourns Inc. qualifies as a substitute based on matching inductance, ferrite core construction, shielded design, and surface mount configuration. Dimensional variations and DC resistance differences remain within acceptable engineering parameters for equivalent circuit performance.

Parameter Comparison

Engineering Selection Recommendations

SPD125R-473M Selection Criteria:

• Applications requiring extended low-temperature operation below -40°C
• Designs with strict DC resistance budget constraints (≤115 mOhm)
• Current ratings at or above 1.8 A continuous operation
• Compact PCB layouts requiring minimal footprint (12.00 mm x 12.00 mm)

SRR1206-470YL Selection Criteria:

• Applications operating within -40°C to 125°C range
• Designs benefiting from tighter inductance tolerance (±15%)
• Higher saturation current margin requirements (2.5 A available)
• Designs accommodating slightly larger package dimensions (12.70 mm x 12.70 mm)

Both components maintain active product status and ROHS3 compliance. Selection between these parts depends on specific application constraints regarding temperature range, DC resistance budget, and available PCB space. Dimensional differences require verification against PCB layout constraints before substitution.

Frequently Asked Questions (FAQ)

Q: Can SRR1206-470YL replace SPD125R-473M in all applications?

A: Substitution is valid when application requirements accommodate the following differences: operating temperature minimum of -40°C (versus -55°C), DC resistance up to 130 mOhm (versus 115 mOhm maximum), and package dimensions of 12.70 mm x 12.70 mm x 6.50 mm height (versus 12.00 mm x 12.00 mm x 6.00 mm). Current rating of 1.6 A is lower than the original 1.8 A specification.

Q: What are the critical matching parameters for 47 µH inductor substitution?

A: Critical parameters include inductance value (47 µH exact), ferrite core material, shielded configuration, surface mount technology, and saturation current capability. Tolerance, DC resistance, and temperature range represent secondary factors that must be evaluated against specific circuit requirements.

Q: Are dimensional differences between these parts significant?

A: Dimensional differences of 0.70 mm in length and width, and 0.50 mm in height, require PCB layout verification. Designs with tight component spacing or height constraints must confirm compatibility before substitution.

Q: Do both parts meet compliance requirements?

A: Both SPD125R-473M and SRR1206-470YL are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity). Compliance certifications are equivalent between the two parts.

Q: What is the impact of DC resistance difference on circuit performance?

A: The 15 mOhm difference (115 mOhm versus 130 mOhm) results in increased power dissipation of approximately 2.6% at 1.6 A continuous current. Applications with thermal constraints or strict efficiency requirements must evaluate this difference against design margins.