29L104C Equivalent & Substitute Parts

Part Overview

The 29L104C is a 100 µH shielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 480 mA with a maximum DC resistance of 456 mOhm. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part operates across a temperature range of -40°C to 85°C and is designed for surface mount applications in nonstandard packaging.

Substiute Parts

29L104C

Murata Power Solutions Inc.In Stock: 97429L104C Datasheet

Current PartRFQ

BPSC00070730101TS0

Pulse ElectronicsIn Stock: 1021BPSC00070730101TS0 Datasheet

MFR RecommendedRFQ

PA4301.104NLT

Pulse ElectronicsIn Stock: 4063PA4301.104NLT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 29L104C is determined by the following critical parameters:

• Inductance Value: 100 µH (exact match required)
• Shielding: Shielded configuration
• Mounting Type: Surface Mount
• Current Handling: Minimum 480 mA rating or saturation current capability
• DC Resistance: Maximum 456 mOhm or lower for equivalent performance
• Operating Temperature Range: Minimum -40°C to 85°C coverage
• Package Footprint: 7.20mm x 7.20mm base dimension compatibility

Two active substitute parts meet these criteria: PA4301.104NLT and BPSC00070730101TS0. Both are manufactured by Pulse Electronics and maintain the 100 µH inductance specification with shielded construction suitable for surface mount applications.

Parameter Comparison

Engineering Selection Recommendations

PA4301.104NLT is the primary substitute for the 29L104C. This part maintains identical footprint dimensions (7.20mm x 7.20mm), exceeds the current rating requirement at 520 mA, and provides an extended operating temperature range of -40°C to 125°C. The part is active in production with ROHS3 compliance certification. The DC resistance of 507 mOhm is marginally higher than the original specification but remains within acceptable tolerance for equivalent circuit performance. Testing frequency differs at 1 kHz versus the original 10 kHz specification.

BPSC00070730101TS0 serves as an alternative substitute with active product status. This part maintains the 100 µH inductance and shielded construction but features a smaller footprint (6.70mm x 6.70mm) and saturation current of 430 mA. The DC resistance of 535 mOhm represents a greater deviation from the original specification. The operating temperature range of -30°C to 100°C covers the original range with upper temperature extension. This option is suitable for applications where reduced board space is prioritized and the higher DCR is acceptable.

Both substitutes are available in Tape & Reel packaging and carry REACH Unaffected and EAR99 classifications matching the original part.

Frequently Asked Questions (FAQ)

Q: Can PA4301.104NLT directly replace 29L104C in existing designs?

A: Yes. PA4301.104NLT maintains the same 100 µH inductance, shielded configuration, and identical 7.20mm x 7.20mm footprint. The higher current rating (520 mA vs. 480 mA) and extended temperature range provide improved performance margins. The DC resistance increase of 51 mOhm should be evaluated in circuits sensitive to inductor losses.

Q: What are the footprint differences between the substitute parts?

A: PA4301.104NLT matches the original 29L104C at 7.20mm x 7.20mm. BPSC00070730101TS0 uses a smaller 6.70mm x 6.70mm footprint. Height differences are minimal (3.00mm vs. 3.15mm). PCB layout compatibility must be verified before selection.

Q: How do DC resistance values affect circuit performance?

A: The 29L104C specifies 456 mOhm maximum DCR. PA4301.104NLT at 507 mOhm and BPSC00070730101TS0 at 535 mOhm represent 11% and 17% increases respectively. In power delivery and filtering applications, higher DCR increases resistive losses and heat generation. Circuit simulations should confirm acceptable performance with substitute DCR values.

Q: Are both substitutes suitable for the full -40°C to 85°C operating range?

A: PA4301.104NLT covers -40°C to 125°C, fully encompassing the original range with margin. BPSC00070730101TS0 covers -30°C to 100°C, which covers the original range except at the lower -40°C extreme. Application temperature requirements determine suitability.

Q: What compliance certifications apply to the substitute parts?

A: PA4301.104NLT carries ROHS3 compliance. Both substitutes are REACH Unaffected and classified as EAR99 for export control purposes, matching the original part's regulatory status.