Equivalent & Substitute Parts for 29L103C

Part Overview

The Murata Power Solutions 29L103C is a 10 µH shielded wirewound inductor rated for 1.55 A with a maximum DC resistance of 64 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 suitable for surface mount applications in nonstandard packaging.

Substiute Parts

29L103C

Murata Power SolutionsIn Stock: 86029L103C Datasheet

Current PartRFQ

BPSC00070730100MS0

Pulse ElectronicsIn Stock: 684BPSC00070730100MS0 Datasheet

MFR RecommendedRFQ

BPSC00070730100TS0

Pulse ElectronicsIn Stock: 980BPSC00070730100TS0 Datasheet

MFR RecommendedRFQ

SRR6028-100Y

Bourns Inc.In Stock: 3692SRR6028-100Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 29L103C is determined by the following critical parameters:

• Inductance Value: 10 µH (exact match required)
• Shielding: Shielded construction
• Mounting Type: Surface mount
• DC Resistance: Maximum 65 mOhm (allows minimal tolerance above original 64 mOhm specification)
• Current Handling: Minimum 1.55 A rating
• Operating Temperature Range: Minimum -30°C to 100°C (covers or exceeds original -40°C to 85°C range)
• Moisture Sensitivity: MSL 1 (Unlimited)

Three active substitute parts meet these criteria: BPSC00070730100MS0 and BPSC00070730100TS0 from Pulse Electronics, and SRR6028-100Y from Bourns Inc.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are active products with ROHS3 compliance and MSL 1 rating, ensuring long-term availability and environmental regulatory compliance.

BPSC00070730100MS0 and BPSC00070730100TS0 (Pulse Electronics): These parts share identical electrical specifications with 1.15 A current saturation rating and 65 mOhm DCR. The primary difference is inductance tolerance (±20% for MS0 variant, ±30% for TS0 variant). Both operate across -30°C to 100°C. Selection between these variants depends on tolerance requirements for the application. The TS0 variant offers higher inventory availability (894 pcs vs. 656 pcs).

SRR6028-100Y (Bourns Inc.): This part provides the highest current rating at 2 A with 1.7 A saturation current, exceeding the original 1.55 A specification. It supports an extended operating temperature range of -40°C to 125°C, matching the lower temperature limit of the original part. The SRR6028 series offers the largest inventory (3601 pcs) and includes additional performance data (Q factor and self-resonant frequency). This part is suitable for applications requiring enhanced thermal performance or higher current margins.

Frequently Asked Questions (FAQ)

Q: Can BPSC00070730100MS0 and BPSC00070730100TS0 be used interchangeably?

A: Both parts are electrically equivalent with identical inductance, DCR, current saturation, and operating temperature specifications. The difference lies in inductance tolerance: MS0 is ±20% while TS0 is ±30%. Selection depends on circuit tolerance requirements. Both are surface mount, shielded, and MSL 1 rated.

Q: Why does SRR6028-100Y have a lower current saturation rating (1.7 A) than its 2 A current rating?

A: Current saturation (Isat) and current rating represent different electrical characteristics. The 2 A rating indicates the maximum continuous current the inductor can handle, while 1.7 A saturation current defines the point at which inductance begins to degrade. Both specifications are provided by the manufacturer and are within acceptable operating parameters for the 29L103C replacement.

Q: Is the SRR6028-100Y suitable if my circuit operates at -40°C?

A: Yes. The SRR6028-100Y operates from -40°C to 125°C, matching the lower temperature limit of the original 29L103C. The Pulse Electronics alternatives (BPSC variants) operate from -30°C to 100°C, which does not cover the -40°C minimum. For applications requiring -40°C operation, SRR6028-100Y is the appropriate choice.

Q: Are all three substitutes available in the same package?

A: All three parts are surface mount inductors in nonstandard packaging with similar physical dimensions (6.70 mm to 6.80 mm length and width, 3.00 mm to 3.15 mm height). Mechanical compatibility should be verified against PCB layout specifications, though the dimensional similarity supports direct substitution.

Q: What compliance certifications apply to these substitutes?

A: All three substitute parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. MSL 1 (Unlimited) moisture sensitivity applies to all parts, indicating no special moisture handling requirements during storage or assembly.