SRR1208-150M Equivalent & Substitute Parts

Part Overview

The SRR1208-150M is a 15 µH shielded drum core, wirewound inductor manufactured by Bourns Inc., rated for 4 A continuous current with a maximum DC resistance of 36 mOhm. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The part operates across the temperature range of -40°C to 125°C and is housed in a nonstandard surface mount package measuring 12.70mm × 12.70mm × 8.50mm (max height).

Substiute Parts

SRR1208-150M

Bourns Inc.In Stock: 950SRR1208-150M Datasheet

Current PartRFQ

SRR1208-150ML

Bourns Inc.In Stock: 6157SRR1208-150ML Datasheet

DirectRFQ

DR127-150-R

Eaton - Electronics DivisionIn Stock: 5747DR127-150-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SRR1208-150M is determined by the following critical parameters:

• Inductance Value: Must be 15 µH with ±20% tolerance
• Core Type & Shielding: Must be ferrite-based, shielded drum core construction
• Current Rating: Must support minimum 4 A continuous current
• DC Resistance: Must not exceed 36 mOhm to maintain thermal and efficiency characteristics
• Operating Temperature: Must support -40°C to 125°C range
• Mounting & Package: Must be surface mount compatible with nonstandard package dimensions
• Compliance: Must maintain ROHS3 compliance and REACH unaffected status

Two substitute parts meet these criteria with varying degrees of parameter alignment.

Parameter Comparison

Engineering Selection Recommendations

SRR1208-150ML is the primary substitute for SRR1208-150M. Both parts are manufactured by Bourns Inc. within the same SRR1208 series and share identical electrical specifications: 15 µH inductance, 4 A current rating, and 36 mOhm maximum DC resistance. The SRR1208-150ML is currently in active production status with 6,100 units in stock, compared to the obsolete SRR1208-150M. The only distinction is packaging format: SRR1208-150ML is supplied in Tape & Reel (TR) configuration, whereas the main part uses standard packaging. Both maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

DR127-150-R manufactured by Eaton - Electronics Division serves as a secondary substitute with enhanced electrical performance. This part maintains the same 15 µH inductance value and ±20% tolerance but offers superior current handling with a 5.03 A rating versus 4 A, and lower DC resistance of 24.7 mOhm compared to 36 mOhm maximum. The saturation current (Isat) is also higher at 9.66 A. Physical dimensions are slightly smaller (12.50mm × 12.50mm × 8.00mm max height) compared to the original part. DR127-150-R is active in production with 5,642 units available. This part is suitable for applications where improved thermal performance or higher current margin is beneficial, provided PCB layout accommodates the minor dimensional differences.

Both substitutes maintain full compliance with ROHS3 and REACH requirements, operate across the identical -40°C to 125°C temperature range, and employ ferrite-core shielded construction on surface mount nonstandard packages.

Frequently Asked Questions (FAQ)

Q: Can SRR1208-150ML be used as a direct replacement for SRR1208-150M?

A: Yes. Both parts are electrically and mechanically identical with matching inductance (15 µH), current rating (4 A), DC resistance (36 mOhm max), and physical dimensions (12.70mm × 12.70mm × 8.50mm). The difference is packaging format: SRR1208-150ML is supplied in Tape & Reel configuration. If your assembly process accommodates tape and reel packaging, this is a direct functional substitute.

Q: What are the advantages of using DR127-150-R over SRR1208-150ML?

A: DR127-150-R provides enhanced electrical performance with 5.03 A current rating (versus 4 A), lower DC resistance of 24.7 mOhm (versus 36 mOhm max), and higher saturation current of 9.66 A (versus 5.6 A). These characteristics result in reduced power dissipation and improved thermal margin. Physical dimensions are marginally smaller. Selection depends on whether your application requires this additional performance headroom and whether PCB layout can accommodate the minor size difference.

Q: Are there any compliance or regulatory differences between the three parts?

A: No. All three parts maintain identical ROHS3 compliance, REACH unaffected status, MSL 1 (unlimited moisture sensitivity), and operate across -40°C to 125°C. Regulatory and environmental requirements are equivalent across all options.

Q: What is the impact of the dimensional difference between SRR1208-150M and DR127-150-R?

A: SRR1208-150M measures 12.70mm × 12.70mm × 8.50mm (max height), while DR127-150-R measures 12.50mm × 12.50mm × 8.00mm (max height). The differences are minor (0.20mm in length/width, 0.50mm in height). PCB footprint compatibility must be verified during layout review, though the smaller size of DR127-150-R typically presents no placement constraints.

Q: Why is SRR1208-150M listed as obsolete?

A: The SRR1208-150M has reached end-of-life status. SRR1208-150ML, the active variant within the same series, provides continued supply and is the recommended transition path for new designs or production replenishment.

Q: Can these parts be used interchangeably in existing designs?

A: SRR1208-150ML is a direct interchange with no design modifications required. DR127-150-R requires verification of PCB footprint compatibility due to minor dimensional differences, though electrical performance is superior. Both substitutes maintain the same operating temperature range and compliance certifications as the original part.