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Murata Power Solutions 47470SC Equivalent & Substitute Parts
Part Overview
The Murata Power Solutions 47470SC is a 47 µH shielded wirewound inductor rated for 1.9 A with a maximum DC resistance of 168mOhm. This component is classified as obsolete, making equivalent substitute parts 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 4-lead configurations.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 47 µH |
| Inductance Tolerance | ±20% |
| Current Rating | 1.9 A |
| DC Resistance (DCR) | 168mOhm Max |
| Shielding | Shielded |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package Type | Nonstandard, 4 Lead |
| Frequency - Self Resonant | 11 MHz |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the 47470SC are selected based on the following critical parameters that must align with the original specification:
- Inductance Value: All substitutes maintain 47 µH ±20% tolerance
- Current Rating: Substitutes rated at 1.9 A or higher ensure equivalent current handling capability
- DC Resistance: Substitutes with DCR ≤ 168mOhm maintain electrical performance characteristics
- Shielding: All substitutes are shielded to prevent electromagnetic interference
- Surface Mount Configuration: All substitutes use surface mount technology compatible with standard PCB assembly processes
- Operating Temperature Range: Substitutes rated for -40°C minimum and 85°C minimum ensure thermal compatibility
- Moisture Sensitivity: All substitutes maintain MSL 1 classification for unlimited shelf life
The following active substitute parts meet these criteria and are available from authorized manufacturers.
Parameter Comparison
| Parameter | 47470SC (Murata) | 7447715470 (Würth) | BPSC00131345470M00 (Pulse) | BPSC00131345470T00 (Pulse) | CDRH124NP-470MC (Sumida) | SRR1205-470ML (Bourns) |
|---|---|---|---|---|---|---|
| Inductance | 47 µH | 47 µH | 47 µH | 47 µH | 47 µH | 47 µH |
| Inductance Tolerance | ±20% | ±20% | ±20% | ±30% | ±20% | ±20% |
| Current Rating (A) | 1.9 | 1.95 | — | — | 1.9 | — |
| DC Resistance (mOhm Max) | 168 | 125 | 150 | 150 | 150 | — |
| Shielding | Shielded | Shielded | Shielded | Shielded | Shielded | Shielded |
| Operating Temperature (°C) | -40 ~ 85 | -40 ~ 125 | -40 ~ 125 | -40 ~ 125 | -40 ~ 100 | -40 ~ 125 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package Type | Nonstandard, 4 Lead | Nonstandard | Nonstandard | Nonstandard | Nonstandard | Nonstandard |
| Self Resonant Frequency (MHz) | 11 | 9.7 | — | — | — | — |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| RoHS Status | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
All listed substitute parts are active products with current manufacturing status, ensuring long-term availability and supply chain stability. The following considerations apply to component selection:
Würth Elektronik 7447715470: This part offers the lowest DC resistance at 125mOhm, providing improved efficiency characteristics. It carries AEC-Q200 automotive qualification and ROHS3 compliance. The extended operating temperature range to 125°C provides additional thermal margin beyond the original specification.
Pulse Electronics BPSC00131345470M00 and BPSC00131345470T00: Both Pulse variants maintain 150mOhm DC resistance and are ROHS3 compliant. The BPSC00131345470T00 variant features ±30% inductance tolerance compared to the standard ±20%, which may require circuit validation in tolerance-sensitive applications. Both support extended temperature operation to 125°C.
Sumida America CDRH124NP-470MC: This part maintains 1.9 A current rating matching the original specification and provides 150mOhm DC resistance. Operating temperature extends to 100°C, providing adequate thermal headroom for most applications. ROHS3 compliance is confirmed.
Bourns SRR1205-470ML: This drum core wirewound inductor maintains the ±20% inductance tolerance and operates across -40°C to 125°C. ROHS3 compliance and unlimited moisture sensitivity classification are confirmed. DC resistance data is not provided in the specification.
All substitute parts maintain shielded construction, surface mount configuration, and MSL 1 moisture sensitivity classification consistent with the original 47470SC specification.
Frequently Asked Questions (FAQ)
Q: Can the 47470SC be directly replaced with any of these substitute parts?
A: All listed substitutes meet the core electrical parameters: 47 µH inductance, shielded construction, surface mount technology, and MSL 1 classification. Physical package dimensions vary slightly (ranging from 12.00mm to 12.70mm), requiring PCB layout verification. DC resistance values are equal to or lower than the original specification, ensuring equivalent or improved performance.
Q: What is the significance of DC resistance differences among the substitutes?
A: The original 47470SC specifies 168mOhm maximum DC resistance. All active substitutes feature lower DCR values (125–150mOhm), which reduce resistive losses and improve efficiency. Lower DCR also reduces heat generation during operation, benefiting thermal performance in the application circuit.
Q: Are there temperature range considerations when selecting a substitute?
A: The original 47470SC operates from -40°C to 85°C. All substitute parts extend the upper temperature limit to 100°C or 125°C, providing additional thermal margin. If the application operates exclusively within the original -40°C to 85°C range, all substitutes remain fully compatible. Applications requiring operation above 85°C benefit from the extended temperature ratings of the substitute parts.
Q: What is the impact of inductance tolerance differences?
A: The original 47470SC and most substitutes maintain ±20% inductance tolerance. The Pulse BPSC00131345470T00 variant specifies ±30% tolerance. In circuits with tight inductance requirements, the ±20% tolerance parts are preferred. The ±30% variant requires circuit simulation or testing to confirm acceptable performance margins.
Q: Are all substitutes RoHS compliant?
A: All active substitute parts carry ROHS3 compliance certification. The original 47470SC does not specify RoHS status. For applications requiring RoHS compliance, all listed substitutes meet this requirement.
Q: How do package dimensions affect PCB compatibility?
A: The original 47470SC measures 0.480" × 0.480" (12.20mm × 12.20mm) with 0.197" (5.00mm) seated height. Substitute parts range from 12.00mm to 12.70mm in length and width, with seated heights from 4.50mm to 5.50mm. PCB footprints must accommodate these dimensional variations. Consult component datasheets for precise pad layouts and clearance requirements.
Q: What certifications distinguish the substitute parts?
A: The Würth Elektronik 7447715470 carries AEC-Q200 automotive qualification, suitable for automotive and high-reliability applications. All substitutes maintain ROHS3 compliance and unlimited moisture sensitivity classification (MSL 1), ensuring compatibility with standard PCB assembly and storage practices.
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