PM105S-101M Equivalent & Substitute Parts

Part Overview

The PM105S-101M is a 100 µH shielded drum core wirewound inductor manufactured by Bourns Inc., rated for 800 mA continuous current with a maximum DC resistance of 350 mOhm. This surface mount component operates across -30°C to 100°C and features ferrite core construction with ±20% inductance tolerance.

The PM105S-101M is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductor specification.

Substiute Parts

PM105S-101M

Bourns Inc.In Stock: 1020PM105S-101M Datasheet

Current PartRFQ

PM105SB-101K-RC

Bourns Inc.In Stock: 2833PM105SB-101K-RC Datasheet

DirectRFQ

SDR1006-101KL

Bourns Inc.In Stock: 6098SDR1006-101KL Datasheet

SimilarRFQ

SRR0908-101YL

Bourns Inc.In Stock: 778SRR0908-101YL Datasheet

SimilarRFQ

SLF10145T-101M1R0-PF

TDK CorporationIn Stock: 26913SLF10145T-101M1R0-PF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM105S-101M is determined by the following critical parameters:

• Inductance Value: Must be 100 µH (±20% tolerance acceptable)
• Current Rating: Minimum 800 mA required; higher ratings acceptable
• DC Resistance: Maximum 350 mOhm; lower values acceptable
• Shielding: Shielded construction required to maintain electromagnetic isolation
• Core Material: Ferrite core required
• Mounting Type: Surface mount configuration required
• Operating Temperature Range: Must encompass or exceed -30°C to 100°C minimum

Substitute parts are grouped into two categories:

Direct Equivalent: PM105SB-101K-RC meets all critical parameters with improved specifications and active product status.

Similar Alternatives: SDR1006-101KL, SRR0908-101YL, and SLF10145T-101M1R0-PF satisfy the core electrical requirements but with noted variations in shielding, current rating, or compliance status.

Parameter Comparison

Engineering Selection Recommendations

PM105SB-101K-RC is the primary recommended substitute. This Bourns Inc. part maintains the same 100 µH inductance and shielded ferrite drum core construction. Although the current rating is reduced to 720 mA, the DC resistance is improved to 340 mOhm Max. The part is active in production, ROHS3 compliant, and operates across -40°C to 125°C, providing extended temperature coverage. Inductance tolerance is tightened to ±10%.

SDR1006-101KL provides higher current capacity at 970 mA with matching 350 mOhm DCR. However, this part is unshielded, which may introduce electromagnetic interference considerations in sensitive applications. The part is ROHS3 compliant and active.

SRR0908-101YL offers the highest current rating at 1 A with superior DC resistance of 280 mOhm Max. This Bourns Inc. part maintains shielding and is ROHS3 compliant. The package configuration is 8-SMD Gull Wing, which differs from the nonstandard package of the original part.

SLF10145T-101M1R0-PF is a TDK Corporation alternative with 1.1 A current rating and the lowest DC resistance at 240 mOhm Max. This part is marked "Not For New Designs," limiting its suitability for ongoing development. Operating temperature range is -40°C to 105°C.

Frequently Asked Questions (FAQ)

Q: Can PM105SB-101K-RC replace PM105S-101M in all applications?

A: PM105SB-101K-RC is suitable for applications where the 720 mA current rating meets or exceeds the design requirement. The improved inductance tolerance (±10% vs ±20%) and extended operating temperature range (-40°C to 125°C) provide enhanced performance margins. Verify that your circuit does not require the full 800 mA rating of the original part.

Q: Why is SDR1006-101KL listed as a similar alternative rather than a direct equivalent?

A: SDR1006-101KL is unshielded, whereas PM105S-101M is shielded. Shielding reduces electromagnetic radiation and susceptibility to external fields. In applications where EMI control is critical, the unshielded construction may not be acceptable despite superior current handling.

Q: What is the significance of the "Not For New Designs" status on SLF10145T-101M1R0-PF?

A: This designation indicates that TDK Corporation is not recommending this part for new circuit designs. While existing inventory may be available, long-term supply cannot be guaranteed. This part should be considered only for legacy system maintenance or when other alternatives are unsuitable.

Q: How do package differences affect substitution?

A: PM105S-101M uses a nonstandard surface mount package. SRR0908-101YL uses an 8-SMD Gull Wing package. Physical dimensions and footprint compatibility must be verified before substitution. Consult PCB layout requirements and reflow soldering specifications for your specific application.

Q: Are all substitute parts RoHS compliant?

A: PM105S-101M is RoHS non-compliant. All listed substitutes (PM105SB-101K-RC, SDR1006-101KL, SRR0908-101YL, and SLF10145T-101M1R0-PF) are ROHS3 compliant, meeting current environmental regulations for new designs and manufacturing.

Q: What is the impact of DC resistance differences on circuit performance?

A: Lower DC resistance reduces power dissipation and heat generation. PM105S-101M specifies 350 mOhm Max. SRR0908-101YL (280 mOhm) and SLF10145T-101M1R0-PF (240 mOhm) provide improved efficiency. PM105SB-101K-RC (340 mOhm) and SDR1006-101KL (350 mOhm) maintain comparable performance.