SPD125R-183M

Part Overview

The SPD125R-183M is a fixed, shielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 18 µH inductance at 3 A. The part is in active product status and is Surface Mount compatible with RoHS3 compliance. Identifying equivalent substitute parts becomes necessary when the primary component experiences extended lead times, inventory constraints, or when alternative sourcing improves procurement efficiency while maintaining functional compatibility within circuit specifications.

Substiute Parts

SPD125R-183M

API Delevan Inc.In Stock: 739SPD125R-183M Datasheet

Current PartRFQ

SRR1206-180ML

Bourns Inc.In Stock: 3397SRR1206-180ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR1206-180ML from Bourns Inc. qualifies as a direct substitute based on the following critical parameters:

• Inductance Match: Both parts specify 18 µH inductance with ±20% tolerance, meeting the same functional inductance requirement
• Core Material and Shielding: Both employ ferrite core construction with shielding, maintaining electromagnetic isolation properties
• Mounting and Packaging: Both are surface mount components supplied in Tape & Reel packaging, ensuring PCB assembly compatibility
• Regulatory Compliance: Both achieve RoHS3 compliance and carry identical ECCN and HTSUS classifications

The substitute exhibits measurable differences in current rating (2.5 A vs. 3 A) and DC resistance (50 mOhm vs. 70 mOhm), which must be evaluated within specific circuit requirements. The SRR1206-180ML provides lower resistance characteristics at reduced current capacity, suitable for applications where thermal dissipation constraints or resistance optimization align with lower current demands.

Parameter Comparison

Engineering Selection Recommendations

Both SPD125R-183M and SRR1206-180ML achieve RoHS3 compliance and carry equivalent regulatory designations (REACH Unaffected, ECCN EAR99). Selection between these components depends on circuit-level current requirements and thermal constraints. The SPD125R-183M supports higher current operation at 3 A with higher DC resistance. The SRR1206-180ML operates at 2.5 A with improved resistance characteristics and higher saturation current (4.7 A), benefiting applications with lower operating current and thermal efficiency priorities.

Physical footprint differences exist: the SRR1206-180ML exhibits slightly larger dimensions (12.70mm vs. 12.00mm) and greater seated height (6.50mm vs. 6.00mm), requiring verification of PCB layout clearance. The operating temperature minimum for SRR1206-180ML spans -40°C to 125°C, compared to the SPD125R-183M range of -55°C to 125°C, limiting low-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can SRR1206-180ML replace SPD125R-183M in all applications? A: Substitution is valid when circuit current requirements do not exceed 2.5 A and operating temperature remains above -40°C. The lower saturation current (4.7 A vs. 3 A) and higher resistance characteristics require circuit-level validation.

Q: Are there physical mounting constraints? A: Both components are surface mount with nonstandard package geometry. The SRR1206-180ML is larger (12.70mm x 12.70mm x 6.50mm max height) versus SPD125R-183M (12.00mm x 12.00mm x 6.00mm max height). Verify footprint compatibility with PCB design and component density requirements.

Q: Do both parts meet supply chain compliance requirements? A: Both parts achieve RoHS3 compliance, REACH Unaffected status, and identical ECCN and HTSUS classifications. Moisture sensitivity level is equivalent at MSL 1 (Unlimited), meeting IPC J-STD-020 handling specifications.

Q: What is the impact of DC resistance differences? A: The SRR1206-180ML exhibits 50 mOhm DCR versus 70 mOhm for SPD125R-183M. Lower resistance reduces inductor-related voltage drop and thermal dissipation, beneficial in low-voltage, high-efficiency applications within the 2.5 A current limit.

Q: Are inductance values truly equivalent? A: Both parts specify 18 µH inductance with ±20% tolerance, measured at 1 kHz. They are functionally equivalent for inductance filtering and energy storage applications within the specified tolerance band.