Murata Power Solutions 40100C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 40100C is a 10 µH unshielded toroidal inductor rated for 3 A continuous current with a maximum DC resistance of 23mOhm. Designed for surface mount applications, this component operates across the -40°C to 85°C temperature range and is part of the 4000 series product line. The 40100C has reached obsolete status, necessitating identification of functionally equivalent substitute components for ongoing design support and procurement continuity.

Substiute Parts

40100C

Murata Power Solutions Inc.In Stock: 98440100C Datasheet

Current PartRFQ

P0845SNLT

Pulse ElectronicsIn Stock: 2664P0845SNLT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 40100C are identified based on the following critical electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value: 10 µH (exact match required)
• Mounting type: Surface mount (form factor compatibility)
• Package classification: Nonstandard toroidal (physical footprint category)
• Type: Toroidal inductor (core geometry)

Secondary Compatibility Parameters:

• Current rating: Minimum 3 A (equal or greater acceptable)
• DC resistance: Evaluated against application requirements
• Operating temperature range: Minimum -40°C to 85°C coverage
• Regulatory compliance: RoHS and REACH status alignment

The Pulse Electronics P0845SNLT qualifies as a substitute based on matching inductance, toroidal type, surface mount configuration, and nonstandard package classification. Differences in current rating, DC resistance, shielding, and temperature range represent design trade-offs that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The Pulse Electronics P0845SNLT serves as the manufacturer-recommended substitute for the obsolete Murata 40100C. Both components maintain RoHS compliance and REACH unaffected status, satisfying regulatory requirements for new designs and procurement.

The P0845SNLT provides higher current capacity (4.3 A versus 3 A) and extended operating temperature range (-40°C to 130°C versus -40°C to 85°C), offering design margin in thermal and load scenarios. The shielded construction of the P0845SNLT contrasts with the unshielded design of the 40100C; this difference requires evaluation based on electromagnetic interference considerations in the target application.

The increased DC resistance of the P0845SNLT (50mOhm versus 23mOhm) results in higher resistive losses. Applications sensitive to power dissipation or thermal performance must account for this parameter difference during circuit analysis.

Active product status of the P0845SNLT ensures long-term availability and supply chain continuity compared to the obsolete 40100C.

Frequently Asked Questions (FAQ)

Q: Can the P0845SNLT directly replace the 40100C in existing designs?

A: The P0845SNLT matches the critical electrical specification (10 µH inductance) and physical form factor (nonstandard toroidal, surface mount). However, differences in DC resistance, shielding, and current rating require circuit-level evaluation. The higher current rating and extended temperature range of the P0845SNLT are generally compatible with applications designed for the 40100C, provided power dissipation from increased DCR is acceptable.

Q: What is the significance of the shielding difference between these components?

A: The 40100C is unshielded while the P0845SNLT is shielded. Shielding reduces electromagnetic field radiation and susceptibility to external interference. Applications requiring low EMI emission or operating in electromagnetically noisy environments may benefit from the shielded design. Conversely, unshielded inductors typically occupy less board space and cost less. The shielding difference must be evaluated against specific application requirements.

Q: How does the DC resistance difference affect circuit performance?

A: The P0845SNLT exhibits 50mOhm DCR compared to 23mOhm for the 40100C. At the 3 A design current, this represents an additional power loss of approximately 0.27 W in the substitute component. Applications with strict power budget or thermal constraints must account for this increased dissipation during design verification.

Q: Are there package or footprint compatibility concerns?

A: Both components use nonstandard toroidal packages for surface mount applications. Physical dimensions differ slightly: the 40100C measures 0.560" L × 0.555" W × 0.345" H, while the P0845SNLT measures 0.620" L × 0.600" W × 0.390" H. PCB layout verification is required to confirm mechanical fit within the available board space.

Q: What is the tolerance specification for the P0845SNLT inductance?

A: The P0845SNLT carries ±20% inductance tolerance. No tolerance specification is provided for the 40100C in the available data. Circuit designs must accommodate the P0845SNLT tolerance band during performance analysis.