47330SC Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 47330SC is a 33 µH shielded wirewound inductor rated for 2.2 A with a maximum DC resistance of 91.1 mOhm. This surface mount component operates across -40°C to 85°C and is designed for nonstandard 4-lead packaging. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain the 33 µH inductance specification while accommodating variations in current rating, DC resistance, and operating temperature range within acceptable design margins.

Substiute Parts

47330SC

Murata Power Solutions Inc.In Stock: 100847330SC Datasheet

Current PartRFQ

7447715330

Würth ElektronikIn Stock: 13417447715330 Datasheet

MFR RecommendedRFQ

BPSC00131345330M00

Pulse ElectronicsIn Stock: 1576BPSC00131345330M00 Datasheet

MFR RecommendedRFQ

BPSC00131345330T00

Pulse ElectronicsIn Stock: 795BPSC00131345330T00 Datasheet

MFR RecommendedRFQ

SRR1205-330ML

Bourns Inc.In Stock: 1205SRR1205-330ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Matching Parameters:

• Inductance value: 33 µH (exact match required)
• Inductance tolerance: ±20% or tighter
• Shielding: Shielded construction
• Mounting type: Surface mount
• Package classification: Nonstandard form factor

Secondary Compatibility Parameters:

• Current rating: Substitute must equal or exceed 2.2 A
• DC resistance: Lower or equal to 91.1 mOhm preferred; higher values acceptable if thermal and efficiency requirements permit
• Operating temperature: Minimum -40°C to 85°C coverage required; extended range acceptable
• RoHS/REACH compliance: Maintained across all substitutes

All four substitute parts meet the primary matching criteria. Variations in current saturation rating, Q factor, and self-resonant frequency do not disqualify substitution but should be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

7447715330 (Würth Elektronik WE-PD Series) This substitute offers the closest electrical match with 2.3 A current rating, 85 mOhm DCR, and extended operating temperature to 125°C. The part carries AEC-Q200 automotive qualification and ROHS3 compliance. Physical dimensions (12.00 mm × 12.00 mm × 4.50 mm) are comparable to the original. This option is recommended for applications requiring high reliability and automotive-grade performance.

BPSC00131345330M00 and BPSC00131345330T00 (Pulse Electronics BPSC Series) Both Pulse variants provide 2.7 A saturation current and 97 mOhm DCR with extended temperature range to 125°C. The primary difference is inductance tolerance (±20% vs. ±30%). These parts are suitable for general industrial applications with ROHS3 compliance. Physical dimensions (12.50 mm × 12.50 mm × 4.50 mm) represent a minor increase over the original footprint.

SRR1205-330ML (Bourns SRR1205 Series) This substitute features the highest saturation current (4.6 A) and extended temperature range to 125°C. However, the 145 mOhm DCR is significantly higher than the original specification, resulting in increased power dissipation. The 1.8 A current rating is below the original 2.2 A specification. This option is suitable only for applications where higher saturation margin is prioritized over lower DC resistance and where the 1.8 A rating is adequate. ROHS3 compliance is maintained.

All substitutes maintain shielded construction, surface mount configuration, and RoHS/REACH compliance required for the original application.

Frequently Asked Questions (FAQ)

Q: Can I use SRR1205-330ML as a direct replacement if my circuit only draws 1.5 A? A: Yes, provided your circuit operates within the 1.8 A current rating of the SRR1205-330ML. However, the 145 mOhm DCR will generate approximately 58% more heat than the original 47330SC at equivalent current levels. Verify thermal management in your design.

Q: What is the impact of higher DC resistance in the Pulse and Bourns substitutes? A: Higher DCR increases I²R losses. At 2.2 A, the Pulse parts (97 mOhm) dissipate approximately 6% more power than the original (91.1 mOhm), while the Bourns part (145 mOhm) dissipates approximately 59% more power. Evaluate thermal budget and efficiency requirements for your application.

Q: Are the physical dimensions interchangeable between all substitutes? A: All substitutes use nonstandard form factors with comparable footprints (12.00–12.70 mm length/width). Height varies from 4.50 mm to 5.50 mm. Verify PCB layout clearance, particularly for the Bourns SRR1205-330ML at 5.50 mm height.

Q: Which substitute offers the best long-term availability? A: The Würth 7447715330, Pulse BPSC series, and Bourns SRR1205-330ML are all active products with established supply chains. Current inventory levels are 1290, 1505/700, and 1160 units respectively.

Q: Does the extended operating temperature range of substitutes affect my design? A: The extended range to 125°C provides additional thermal margin but does not require design changes. If your application operates only within -40°C to 85°C, the extended range offers no functional benefit but ensures compatibility with future temperature requirements.

Q: Can I mix substitute parts in the same production batch? A: All substitutes meet the core 33 µH inductance specification with ±20% tolerance (except BPSC00131345330T00 at ±30%). Mixing is acceptable if your circuit design accommodates the tolerance stack and DCR variations. Document part selection in your bill of materials for traceability.