PM127SH-150M Equivalent & Substitute Parts

Part Overview

The PM127SH-150M is a 15 µH shielded drum core, wirewound inductor manufactured by Bourns Inc., rated for 4.5 A with a maximum DC resistance of 27 mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design updates. The part operates across a temperature range of -30°C to 100°C and is mounted as a surface mount device in a nonstandard 12.50mm × 12.50mm package.

Substiute Parts

PM127SH-150M

Bourns Inc.In Stock: 971PM127SH-150M Datasheet

Current PartRFQ

SRR1280-150M

Bourns Inc.In Stock: 1188SRR1280-150M Datasheet

DirectRFQ

SRR6603-470ML

Bourns Inc.In Stock: 2215SRR6603-470ML Datasheet

DirectRFQ

SRR1208-150ML

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

SimilarRFQ

CDRH127NP-150MC

Sumida America Components Inc.In Stock: 29249CDRH127NP-150MC Datasheet

SimilarRFQ

SLF12575T-150M4R7-H

TDK CorporationIn Stock: 1533SLF12575T-150M4R7-H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM127SH-150M are classified based on strict electrical and mechanical parameter alignment:

Direct Substitutes maintain identical inductance (15 µH), tolerance (±20%), shielding (shielded), core material (ferrite), and mounting type (surface mount). These parts must accommodate the 4.5 A current requirement and operate within compatible temperature ranges.

Similar Substitutes share the same inductance and tolerance specifications but may vary in current rating, DC resistance, physical dimensions, or temperature operating range. These parts are suitable when the application permits tolerance in secondary electrical characteristics or thermal performance.

The following parameters determine substitution eligibility:

• Inductance value: 15 µH (mandatory)
• Inductance tolerance: ±20% (mandatory)
• Shielding: Shielded (mandatory)
• Mounting type: Surface Mount (mandatory)
• Current rating: Minimum 4.5 A (mandatory for direct substitutes)
• DC resistance: Maximum 27 mOhm (preferred for direct substitutes)
• Package footprint: 12.50mm × 12.50mm (preferred for direct substitutes)

Parameter Comparison

Engineering Selection Recommendations

SRR1280-150M (Bourns Inc.) is the primary direct substitute. It maintains identical inductance, tolerance, and shielding specifications while exceeding the current rating requirement (5.2 A vs. 4.5 A). The DC resistance is marginally higher (28.5 mOhm vs. 27 mOhm), remaining within acceptable tolerance. This part is ROHS3 compliant and active in production, with an extended operating temperature range (-40°C to 125°C). Packaging is Tape & Reel (TR).

CDRH127NP-150MC (Sumida America Components Inc.) provides an exact electrical match with identical current rating (4.5 A) and DC resistance (27 mOhm). This part is ROHS3 compliant and active. Physical dimensions are slightly smaller (12.00mm vs. 12.50mm), requiring verification of PCB layout compatibility. Operating temperature range is -40°C to 100°C.

SLF12575T-150M4R7-H (TDK Corporation) offers superior DC resistance performance (22.08 mOhm vs. 27 mOhm) and higher current rating (4.7 A). This part is ROHS3 compliant but classified as "Not For New Designs," limiting its suitability for new product development. It includes AEC-Q200 automotive qualification.

SRR1208-150ML (Bourns Inc.) is a similar substitute with identical inductance and tolerance. The current rating is lower (4 A vs. 4.5 A) and DC resistance is higher (36 mOhm vs. 27 mOhm). This part is ROHS3 compliant and active. Physical dimensions are marginally larger (12.70mm × 12.70mm × 8.50mm).

SRR6603-470ML is not suitable as a substitute due to different inductance value (47 µH vs. 15 µH) and significantly lower current rating (500 mA vs. 4.5 A).

Frequently Asked Questions (FAQ)

Q: Can SRR1280-150M directly replace PM127SH-150M without circuit modification?

A: Yes. SRR1280-150M maintains the same inductance (15 µH), tolerance (±20%), and shielding. The higher current rating (5.2 A vs. 4.5 A) and marginally higher DC resistance (28.5 mOhm vs. 27 mOhm) are compatible with applications designed for the original part. Verify PCB footprint compatibility, as both parts use the same 12.50mm × 12.50mm package.

Q: What is the primary difference between direct and similar substitutes?

A: Direct substitutes maintain all critical electrical parameters (inductance, tolerance, current rating, DC resistance) and physical dimensions. Similar substitutes share inductance and tolerance but may have different current ratings, DC resistance values, or package dimensions. Similar substitutes require application-level verification before implementation.

Q: Is ROHS3 compliance mandatory for substitute selection?

A: ROHS3 compliance is required for new designs and applications subject to regulatory requirements. The original PM127SH-150M is ROHS non-compliant. All active substitute options (SRR1280-150M, SRR1208-150ML, CDRH127NP-150MC, SLF12575T-150M4R7-H) are ROHS3 compliant.

Q: How do package dimension differences affect substitution?

A: CDRH127NP-150MC uses a 12.00mm × 12.00mm footprint versus the original 12.50mm × 12.50mm. This requires PCB layout verification to confirm clearance and thermal management compatibility. SRR1208-150ML uses a 12.70mm × 12.70mm footprint, also requiring layout confirmation.

Q: Why is SLF12575T-150M4R7-H marked "Not For New Designs"?

A: This designation indicates the part is in mature or declining production status. While electrically suitable, it should not be selected for new product development. SRR1280-150M is the recommended alternative for new designs.

Q: Can SRR1208-150ML be used if current requirement is reduced to 4 A?

A: SRR1208-150ML is suitable only if the application current requirement is confirmed at 4 A or below. The higher DC resistance (36 mOhm vs. 27 mOhm) will increase power dissipation. Thermal analysis is required to confirm acceptable operating conditions.