29L152C Equivalent & Substitute Parts Reference

Part Overview

The 29L152C is a 1.5 µH shielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 4.2 A with a maximum DC resistance of 15mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part features nonstandard corner terminals and surface mount packaging suitable for power conversion and filtering applications.

Substiute Parts

29L152C

Murata Power Solutions Inc.In Stock: 81729L152C Datasheet

Current PartRFQ

BPSC000707301R5TS0

Pulse ElectronicsIn Stock: 1133BPSC000707301R5TS0 Datasheet

MFR RecommendedRFQ

DR73-1R5-R

Eaton - Electronics DivisionIn Stock: 1497DR73-1R5-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 29L152C is determined by the following critical parameters:

• Inductance Value: Must be 1.5 µH (exact match required)
• Shielding: Must be shielded to maintain EMI performance
• Mounting Type: Must be surface mount compatible
• Current Handling: Substitute must support minimum 4.2 A rating
• DC Resistance: Lower or equal DCR values are acceptable; higher values may impact efficiency
• Operating Temperature: Must support the application's thermal requirements
• Package Compatibility: Physical dimensions and terminal configuration must accommodate PCB layout constraints
• Compliance: RoHS and REACH compliance status must meet regulatory requirements

The two identified substitutes meet these core electrical and mechanical criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

BPSC000707301R5TS0 (Pulse Electronics)

This substitute offers active product status and improved long-term availability. The saturation current of 3.4 A is lower than the original 4.2 A rating, requiring verification that peak current demands do not exceed this threshold. The increased DCR of 19.5mOhm versus 15mOhm will result in higher power dissipation. The extended operating temperature range (-30°C ~ 100°C) provides adequate coverage for most applications. Physical dimensions are slightly smaller (6.70mm x 6.70mm), which may facilitate PCB layout optimization. ROHS3 compliance ensures regulatory alignment with current standards.

DR73-1R5-R (Eaton - Electronics Division)

This substitute provides the strongest electrical performance characteristics, with a current rating of 4.67 A exceeding the original specification and a saturation current of 6.52 A providing substantial margin. The DC resistance of 13mOhm is lower than the original 15mOhm, improving efficiency. The extended operating temperature range (-40°C ~ 125°C) matches or exceeds the original specification. Physical dimensions are slightly larger (7.60mm x 7.60mm x 4.65mm), requiring PCB layout verification. ROHS3 compliance and active product status ensure regulatory and supply chain continuity. The ±20% inductance tolerance is tighter than the Pulse Electronics alternative.

Both substitutes maintain shielded construction, surface mount compatibility, and MSL 1 moisture sensitivity rating. Selection between these options depends on specific application requirements regarding current headroom, thermal performance, and PCB space constraints.

Frequently Asked Questions (FAQ)

Q: Can the BPSC000707301R5TS0 be used in applications requiring sustained 4.2 A operation?

A: The saturation current specification of 3.4 A indicates this part will saturate below the original 4.2 A rating. Applications requiring continuous operation at or near 4.2 A should use the DR73-1R5-R instead.

Q: What is the impact of increased DCR in the BPSC000707301R5TS0 substitute?

A: The DCR increase from 15mOhm to 19.5mOhm results in additional resistive losses. Power dissipation will increase proportionally with the square of the operating current. Thermal analysis is required for high-current applications.

Q: Are the physical dimensions of these substitutes compatible with the original PCB layout?

A: The BPSC000707301R5TS0 is smaller (6.70mm x 6.70mm) and may fit existing footprints with margin. The DR73-1R5-R is slightly larger (7.60mm x 7.60mm) and requires verification against PCB layout constraints. Both maintain similar height profiles within acceptable ranges.

Q: Do these substitutes maintain the same shielding effectiveness as the original 29L152C?

A: All three parts are specified as shielded inductors. Shielding effectiveness depends on core material, winding configuration, and shield construction. Electromagnetic compatibility testing is recommended if EMI performance is critical to the application.

Q: What is the significance of the inductance tolerance differences?

A: The original 29L152C tolerance is not specified. The DR73-1R5-R offers ±20% tolerance, while the BPSC000707301R5TS0 offers ±30% tolerance. Tighter tolerance improves circuit performance consistency but may affect cost and availability. Circuit design should accommodate the specified tolerance range.

Q: Are both substitutes suitable for the full operating temperature range of the original part?

A: The BPSC000707301R5TS0 operates from -30°C to 100°C, which does not cover the original -40°C lower limit. The DR73-1R5-R operates from -40°C to 125°C, fully covering and exceeding the original specification. Temperature range selection depends on application requirements.