SCMS5D25-4R7 Equivalent & Substitute Parts

Part Overview

The SCMS5D25-4R7 is a 4.7 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring fixed inductance in compact form factors. This component is rated for 2.21 A continuous current with a maximum DC resistance of 56 mOhm and operates across the temperature range of -40°C to 125°C. The part maintains Active product status and is ROHS3 compliant, making it suitable for modern electronic assemblies. Equivalent and substitute parts are identified based on matching inductance value, shielding characteristics, surface mount compatibility, and operating temperature ranges within acceptable tolerance specifications.

Substiute Parts

SCMS5D25-4R7

Signal TransformerIn Stock: 697SCMS5D25-4R7 Datasheet

Current PartRFQ

VLCF5024T-4R7N1R3-2

TDK CorporationIn Stock: 2339VLCF5024T-4R7N1R3-2 Datasheet

MFR RecommendedRFQ

VLCF5028T-4R7N1R5-2

TDK CorporationIn Stock: 1473VLCF5028T-4R7N1R5-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SCMS5D25-4R7 are qualified based on the following critical parameters:

• Inductance Value: Exact match at 4.7 µH with ±30% tolerance specification
• Shielding Type: Shielded construction required for electromagnetic interference mitigation
• Mounting Configuration: Surface mount technology for PCB assembly compatibility
• Current Handling: Saturation current and continuous current ratings must support circuit requirements
• DC Resistance: Lower or equivalent DCR values acceptable for reduced power dissipation
• Operating Temperature Range: Minimum coverage of -40°C to 105°C acceptable; extended range to 125°C preferred
• Compliance Standards: ROHS3 compliance and MSL rating of 1 required

The two qualified substitutes—VLCF5024T-4R7N1R3-2 and VLCF5028T-4R7N1R5-2 from TDK Corporation—meet these criteria with matching inductance, shielding, surface mount packaging, and regulatory compliance. Both employ ferrite drum core wirewound construction and maintain the required electrical characteristics within acceptable design margins.

Parameter Comparison

Engineering Selection Recommendations

Selection between the SCMS5D25-4R7 and its substitutes depends on circuit current requirements and thermal operating conditions:

VLCF5024T-4R7N1R3-2 is suitable for applications where continuous current does not exceed 1.33 A. This substitute offers the lowest DC resistance at 44 mOhm maximum, reducing power dissipation. The reduced height of 2.40mm provides additional PCB layout flexibility in space-constrained designs. Both parts maintain ROHS3 compliance and MSL rating of 1.

VLCF5028T-4R7N1R5-2 accommodates higher continuous currents up to 1.58 A with saturation current matching at 1.58 A. DC resistance of 43 mOhm maximum provides minimal power loss. Height matches the original part at 2.80mm, ensuring direct mechanical compatibility. This substitute is preferred when current requirements approach or exceed 1.5 A.

Both TDK substitutes operate to 105°C maximum, which is 20°C below the original part's upper limit. Applications requiring sustained operation above 105°C must retain the SCMS5D25-4R7. All three parts maintain identical inductance tolerance, shielding characteristics, and regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Can VLCF5024T-4R7N1R3-2 or VLCF5028T-4R7N1R5-2 be used as direct replacements for SCMS5D25-4R7?

A: Direct substitution is possible only when circuit current requirements do not exceed the substitute part's continuous current rating. VLCF5024T-4R7N1R3-2 supports up to 1.33 A; VLCF5028T-4R7N1R5-2 supports up to 1.58 A. The original SCMS5D25-4R7 is rated for 2.21 A. If your circuit requires the full 2.21 A rating, neither substitute is appropriate.

Q: What is the impact of the lower operating temperature maximum on the TDK substitutes?

A: The TDK substitutes operate to -40°C to 105°C, while the original part extends to 125°C. If your application requires sustained operation above 105°C, the SCMS5D25-4R7 must be retained. For applications with maximum ambient temperatures at or below 105°C, the substitutes are fully qualified.

Q: How do the DC resistance values affect circuit performance?

A: The TDK substitutes feature lower DC resistance (43–44 mOhm) compared to the original part (56 mOhm). Lower resistance reduces I²R power dissipation and heat generation. This is advantageous in power-sensitive applications. No circuit redesign is required; the lower resistance is a performance benefit.

Q: Are the physical dimensions compatible between the original and substitute parts?

A: The original SCMS5D25-4R7 measures 5.20mm x 5.20mm with 2.80mm height. TDK substitutes measure 5.00mm x 5.00mm. VLCF5024T-4R7N1R3-2 has 2.40mm height; VLCF5028T-4R7N1R5-2 has 2.80mm height. Smaller footprints and heights provide additional PCB layout flexibility but require verification that component placement does not conflict with adjacent circuitry.

Q: Do all parts meet the same compliance and moisture sensitivity requirements?

A: Yes. All three parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: What packaging formats are available for the substitute parts?

A: Both TDK substitutes are supplied in Tape & Reel (TR) format, standard for high-volume surface mount assembly. The original part packaging format is not specified in the data provided.