PM125SH-331M-RC Equivalent & Substitute Parts

Part Overview

The PM125SH-331M-RC is a 330 µH shielded drum core wirewound inductor manufactured by Bourns Inc., rated for 1.15 A continuous current with a maximum DC resistance of 580 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and maintains active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and current rating category.

Substiute Parts

PM125SH-331M-RC

Bourns Inc.In Stock: 1013PM125SH-331M-RC Datasheet

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SRR1208-331KL

Bourns Inc.In Stock: 351314SRR1208-331KL Datasheet

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SRR1260-331K

Bourns Inc.In Stock: 28024SRR1260-331K Datasheet

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DR125-331-R

Eaton - Electronics DivisionIn Stock: 1457DR125-331-R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM125SH-331M-RC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 330 µH (exact match required)
• Core material and shielding: Ferrite, shielded drum core configuration
• Mounting type: Surface mount
• Operating temperature range: -40°C to 125°C minimum
• RoHS3 compliance and MSL 1 rating

Secondary Compatibility Parameters:

• Current rating: Minimum 1.06 A (acceptable for applications requiring ≤1.15 A)
• DC resistance: Maximum 650 mOhm (acceptable variance from 580 mOhm baseline)
• Inductance tolerance: ±10% to ±20% acceptable
• Physical dimensions: Nonstandard package with height variation ≤0.335"

The substitute parts listed maintain the core inductance specification and thermal operating range while accommodating minor variations in current saturation characteristics and DC resistance within acceptable engineering margins for this component category.

Parameter Comparison

Engineering Selection Recommendations

SRR1260-331K (Bourns Inc.): This substitute provides identical electrical specifications to the PM125SH-331M-RC with matching current rating (1.15 A), DC resistance (580 mOhm), and physical dimensions (12.50mm x 12.50mm x 6.50mm). The primary difference is inductance tolerance of ±10% versus ±20%, representing improved accuracy. Packaging is Tape & Reel format. All compliance certifications (ROHS3, MSL 1) are equivalent. This part is suitable for direct substitution in applications where the tighter tolerance is acceptable or beneficial.

DR125-331-R (Eaton - Electronics Division): This substitute maintains the 330 µH inductance and 1.06 A current rating with lower DC resistance (482 mOhm) and reduced height (6.00mm). The current rating of 1.06 A is acceptable for circuits designed for the PM125SH-331M-RC's 1.15 A rating. DC resistance improvement may provide thermal benefits in power-limited applications. All compliance certifications match. Physical footprint compatibility is maintained at 12.50mm x 12.50mm. This part is suitable for substitution in applications where the lower current rating and improved DC resistance characteristics are compatible with circuit requirements.

SRR1208-331KL (Bourns Inc.): This substitute shares the 330 µH inductance and ferrite shielded drum core configuration but is rated for 850 mA continuous current with 650 mOhm maximum DC resistance. The increased height (8.50mm) and slightly larger footprint (12.70mm x 12.70mm) require PCB layout verification. This part is suitable only for applications where the 850 mA current rating is sufficient and physical space constraints permit the increased height. Packaging is Cut Tape & Digi-Reel format.

Frequently Asked Questions (FAQ)

Q: Can SRR1260-331K replace PM125SH-331M-RC in all applications?

A: Yes, SRR1260-331K provides identical electrical performance with matching current rating (1.15 A), DC resistance (580 mOhm), and physical dimensions. The ±10% inductance tolerance is tighter than the PM125SH-331M-RC's ±20%, which is compatible with all applications accepting the original part.

Q: What is the primary limitation of SRR1208-331KL as a substitute?

A: The SRR1208-331KL is rated for 850 mA continuous current, which is lower than the PM125SH-331M-RC's 1.15 A rating. This part is suitable only for circuits designed to operate at or below 850 mA. Additionally, the increased height (8.50mm versus 6.50mm) and larger footprint (12.70mm x 12.70mm) require PCB layout verification for clearance compatibility.

Q: Is DR125-331-R suitable for high-current applications?

A: The DR125-331-R is rated for 1.06 A continuous current, which is slightly lower than the PM125SH-331M-RC's 1.15 A. For applications requiring the full 1.15 A rating, this part is not suitable. However, for circuits operating at 1.06 A or below, the DR125-331-R provides improved DC resistance (482 mOhm) and reduced height (6.00mm), which may offer thermal and space advantages.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed (SRR1260-331K, SRR1208-331KL, and DR125-331-R) are ROHS3 compliant with MSL 1 moisture sensitivity rating, matching the PM125SH-331M-RC compliance profile.

Q: What packaging format differences exist among these parts?

A: PM125SH-331M-RC and SRR1260-331K are supplied in Tape & Reel (TR) format. SRR1208-331KL is supplied in Cut Tape (CT) & Digi-Reel format. DR125-331-R is supplied in Tape & Reel (TR) format. Packaging format selection depends on assembly process requirements and volume considerations.

Q: Can these parts be used interchangeably on the same PCB?

A: SRR1260-331K and DR125-331-R share identical footprint dimensions (12.50mm x 12.50mm) with the PM125SH-331M-RC and can be used interchangeably on the same PCB. SRR1208-331KL has a larger footprint (12.70mm x 12.70mm) and increased height (8.50mm), requiring PCB layout verification before substitution.