Equivalent & Substitute Parts for 29L102C

Part Overview

The Murata Power Solutions 29L102C is a 1 µH shielded wirewound inductor rated for 4.6 A with a maximum DC resistance of 13 mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The 29L102C operates across the temperature range of -40°C to 85°C and is designed for surface mount applications in nonstandard packaging.

Substiute Parts

29L102C

Murata Power Solutions Inc.In Stock: 70729L102C Datasheet

Current PartRFQ

744062001

Würth ElektronikIn Stock: 3023744062001 Datasheet

MFR RecommendedRFQ

BPSC000707301R0TS0

Pulse ElectronicsIn Stock: 826BPSC000707301R0TS0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 29L102C are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

• Inductance Value: Must match 1 µH exactly
• Current Rating: Must meet or exceed 4.6 A
• DC Resistance: Should not significantly exceed 13 mOhm to maintain circuit performance
• Shielding: Must be shielded to maintain electromagnetic compatibility
• Mounting Type: Must be surface mount compatible
• Operating Temperature Range: Should encompass or extend the original -40°C to 85°C range
• Package Compatibility: Physical dimensions and height must accommodate existing PCB layouts

Two active substitute parts meet these criteria: the Würth Elektronik 744062001 and the Pulse Electronics BPSC000707301R0TS0. Both maintain the 1 µH inductance specification and shielded construction while offering improved product status and extended availability.

Parameter Comparison

Engineering Selection Recommendations

Würth Elektronik 744062001 is the primary substitute option. It maintains electrical specifications within acceptable margins (1 µH inductance, 4.8 A current rating, 14 mOhm DCR) while offering active product status and extended operating temperature range to 125°C. The component is RoHS3 compliant and features a smaller footprint (6.80 x 6.80 mm, 2.50 mm height) compared to the original 29L102C. The ferrite drum core construction provides stable performance across the 100 kHz test frequency.

Pulse Electronics BPSC000707301R0TS0 serves as a secondary substitute. While it maintains the 1 µH inductance and shielded construction, the saturation current of 4.6 A falls below the original 4.6 A rating, and the DC resistance of 24 mOhm exceeds the original specification. This part is suitable only for applications where the reduced current capacity and increased resistance are acceptable. The component is RoHS3 compliant with active product status.

Both substitute parts are REACH unaffected and classified under ECCN EAR99, maintaining the same regulatory compliance profile as the original 29L102C.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 744062001 be used as a direct replacement for the 29L102C?

A: The 744062001 meets all critical electrical parameters (1 µH inductance, 4.8 A current rating, 14 mOhm DCR) and maintains shielded surface mount construction. Physical dimensions are slightly smaller (6.80 x 6.80 mm versus 7.20 x 7.20 mm), which may require PCB layout verification. The extended operating temperature range to 125°C provides additional margin beyond the original -40°C to 85°C specification.

Q: What are the limitations of the Pulse Electronics BPSC000707301R0TS0 as a substitute?

A: The BPSC000707301R0TS0 has a saturation current rating of 4.6 A, which is below the original 4.6 A specification. The DC resistance of 24 mOhm is significantly higher than the original 13 mOhm, resulting in increased power dissipation. This part is suitable only for applications where current requirements do not exceed 4.6 A and where the higher resistance is acceptable for circuit performance.

Q: Are there package compatibility concerns when substituting these parts?

A: The Würth 744062001 has a smaller footprint (6.80 x 6.80 mm, 2.50 mm height) compared to the 29L102C (7.20 x 7.20 mm, 3.15 mm height). The Pulse part (6.70 x 6.70 mm, 3.00 mm height) is also slightly smaller. PCB layout verification is required to confirm that existing pad patterns and clearances accommodate the substitute components.

Q: What is the significance of the different inductance test frequencies?

A: The 29L102C and BPSC000707301R0TS0 are tested at 10 kHz, while the Würth 744062001 is tested at 100 kHz. Both test frequencies are standard industry practices. The higher test frequency for the Würth part reflects its drum core construction and does not affect substitution compatibility for applications operating at typical switching frequencies.

Q: Do both substitute parts maintain the same regulatory compliance as the original?

A: Yes. Both the Würth 744062001 and Pulse Electronics BPSC000707301R0TS0 are REACH unaffected and classified as EAR99, matching the original 29L102C compliance profile. The Würth part is additionally RoHS3 compliant, as is the Pulse part.