PM127SH-331M-RC Equivalent & Substitute Parts

Part Overview

The PM127SH-331M-RC is a 330 µH shielded drum core wirewound inductor manufactured by Bourns Inc., rated for 1.1 A continuous current with a maximum DC resistance of 600mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is ROHS3 compliant. The part is currently active in production with 857 pieces available in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter set.

Substiute Parts

PM127SH-331M-RC

Bourns Inc.In Stock: 895PM127SH-331M-RC Datasheet

Current PartRFQ

SRR1280-331K

Bourns Inc.In Stock: 14239SRR1280-331K Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM127SH-331M-RC is determined by matching the following critical parameters:

• Inductance value: 330 µH
• Current rating: 1.1 A minimum
• Saturation current (Isat): 1.4 A minimum
• DC resistance: 600mOhm maximum
• Shielding: Shielded configuration required
• Core material: Ferrite
• Mounting: Surface mount
• Package footprint: 12.50mm x 12.50mm
• Operating temperature range: -40°C to 125°C minimum
• Compliance: ROHS3 compliant

The SRR1280-331K meets all electrical and mechanical requirements for direct substitution with the PM127SH-331M-RC.

Parameter Comparison

Engineering Selection Recommendations

Both the PM127SH-331M-RC and SRR1280-331K are active production components from Bourns Inc. with full ROHS3 compliance and REACH unaffected status. The SRR1280-331K offers a tighter inductance tolerance of ±10% compared to the ±20% tolerance of the PM127SH-331M-RC, while maintaining identical electrical performance across all other specified parameters. Both components are rated for unlimited moisture sensitivity (MSL 1) and operate across the full -40°C to 125°C temperature range. Selection between these parts depends on tolerance requirements for the specific application circuit.

Frequently Asked Questions (FAQ)

Q: Can the SRR1280-331K replace the PM127SH-331M-RC in existing designs?

A: Yes. Both parts share identical inductance values, current ratings, saturation currents, DC resistance specifications, shielding configuration, core material, package footprint, and operating temperature range. The SRR1280-331K provides tighter inductance tolerance (±10% versus ±20%), which may improve circuit performance in tolerance-sensitive applications.

Q: What is the difference in inductance tolerance between these parts?

A: The PM127SH-331M-RC has a tolerance of ±20%, while the SRR1280-331K has a tolerance of ±10%. Both tolerances are measured at 100 kHz. The tighter tolerance of the SRR1280-331K may be beneficial in applications requiring more precise inductance values.

Q: Are the package dimensions identical?

A: Yes. Both parts use the same surface mount package with dimensions of 12.50mm length x 12.50mm width x 8.00mm maximum seated height. PCB footprints and assembly processes are compatible.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the PM127SH-331M-RC and SRR1280-331K are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Both are active production components.

Q: What are the key electrical parameters that must match for substitution?

A: Critical matching parameters include 330 µH inductance, 1.1 A current rating, 1.4 A saturation current, 600mOhm maximum DC resistance, shielded configuration, ferrite core material, and -40°C to 125°C operating temperature range.