SPD125R-153M Equivalent & Substitute Parts

Part Overview

The SPD125R-153M is a 15 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 is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility within specified parameter tolerances.

Substiute Parts

SPD125R-153M

API Delevan Inc.In Stock: 1126SPD125R-153M Datasheet

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SRR1206-150ML

Bourns Inc.In Stock: 1350SRR1206-150ML Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPD125R-153M are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 15 µH (within ±20% tolerance specification)
• Core type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration
• Mounting: Surface mount technology
• Inductance test frequency: 1 kHz

Secondary Compatibility Criteria:

• Current rating: Minimum 2.8 A continuous rating
• DC resistance: Maximum 65 mOhm
• Operating temperature range: Minimum -40°C to 125°C
• Compliance: RoHS3 and REACH requirements
• Packaging: Tape & Reel format

The SRR1206-150ML from Bourns Inc. meets these substitution criteria with equivalent inductance, ferrite core construction, shielding, and surface mount configuration. Dimensional variations and DCR differences are within acceptable engineering tolerances for this component category.

Parameter Comparison

Engineering Selection Recommendations

SPD125R-153M Selection Criteria:

• Applications requiring continuous current up to 3.3 A
• Extended operating temperature range (-55°C minimum)
• Designs with strict low-temperature performance requirements
• Compact footprint priority (12.00 mm x 12.00 mm)

SRR1206-150ML Selection Criteria:

• Applications with continuous current requirements up to 2.8 A
• Lower DC resistance beneficial for thermal management
• Standard operating temperature range (-40°C to 125°C) acceptable
• Slight dimensional increase acceptable in PCB layout

Both parts maintain Active product status with full RoHS3 compliance and REACH unaffected designation, ensuring regulatory compliance for current and future applications. Selection between these parts depends on specific current requirements and thermal constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can SRR1206-150ML directly replace SPD125R-153M in all applications?

A: Direct substitution is valid for applications where continuous current does not exceed 2.8 A. The SPD125R-153M is rated for 3.3 A continuous current; applications requiring this higher current rating must use the original part. Both parts share identical 15 µH inductance and ±20% tolerance specifications.

Q: What are the dimensional compatibility considerations?

A: The SRR1206-150ML is 0.70 mm larger in length and width (12.70 mm vs 12.00 mm) and 0.50 mm taller in height (6.50 mm vs 6.00 mm). PCB layout must accommodate these dimensional differences. Verify clearance with adjacent components and mechanical constraints before substitution.

Q: How do the DC resistance values affect circuit performance?

A: The SRR1206-150ML has lower maximum DC resistance (42 mOhm vs 65 mOhm). Lower DCR reduces I²R losses and heat generation, improving thermal performance. This is advantageous in power-sensitive applications but does not affect inductance value or frequency response characteristics.

Q: Are there temperature range limitations for substitution?

A: The SPD125R-153M operates from -55°C to 125°C, while the SRR1206-150ML operates from -40°C to 125°C. Applications requiring operation below -40°C must use the SPD125R-153M. For standard industrial temperature ranges (-40°C to 125°C), both parts are equivalent.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SPD125R-153M and SRR1206-150ML are RoHS3 compliant, REACH unaffected, and packaged in Tape & Reel format with MSL 1 (Unlimited) moisture sensitivity rating. Regulatory and environmental compliance is equivalent between both parts.

Q: What is the saturation current difference between these parts?

A: The SPD125R-153M has saturation current (Isat) of 3.3 A, while the SRR1206-150ML has Isat of 5.1 A. The substitute part exhibits higher saturation margin, which is beneficial for transient current handling and design margin.