SCRH124-331 Equivalent & Substitute Parts

Part Overview

The SCRH124-331 is a 330 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 780 mA continuous current with a maximum DC resistance of 990mOhm. This component is classified as Active product status and is RoHS3 compliant. Substitute parts become necessary when the original manufacturer part is unavailable, when inventory constraints require alternative sourcing, or when application requirements permit operation within the electrical and mechanical tolerances of qualified equivalents.

Substiute Parts

SCRH124-331

Signal TransformerIn Stock: 1060SCRH124-331 Datasheet

Current PartRFQ

DR124-331-R

Eaton - Electronics DivisionIn Stock: 1929DR124-331-R Datasheet

MFR RecommendedRFQ

DRA124-331-R

Eaton - Electronics DivisionIn Stock: 1868DRA124-331-R Datasheet

MFR RecommendedRFQ

UP2-331-R

Eaton - Electronics DivisionIn Stock: 1970UP2-331-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH124-331 is determined by the following criteria:

Primary Electrical Parameters: Inductance value (330 µH), inductance tolerance (±20%), and DC resistance must remain within acceptable operating margins. The current rating of substitute parts must equal or exceed 780 mA to maintain circuit performance under rated load conditions.

Mechanical Compatibility: All substitute parts must be surface mount devices with identical or compatible package footprints (12.50mm x 12.50mm base dimensions). Height variation is acceptable provided the seated height does not exceed 4.50mm maximum.

Environmental & Compliance Requirements: Operating temperature range must support the application's thermal envelope. RoHS3 compliance is mandatory for all substitutes. Moisture sensitivity level (MSL 1 - Unlimited) is consistent across all qualified alternatives.

Shielding Consideration: The original part specifies shielded construction. Shielded substitutes (DR124-331-R, DRA124-331-R) maintain electromagnetic isolation properties. The unshielded alternative (UP2-331-R) is listed as a substitute but introduces different EMI characteristics and should be selected only when shielding is not a circuit requirement.

Parameter Comparison

Engineering Selection Recommendations

DR124-331-R (Eaton - Electronics Division): This substitute provides the highest current rating (830 mA) and saturation current (920 mA), exceeding the original part's specifications. DC resistance matches the maximum specification. Shielded construction maintains EMI performance. Drum core wirewound design offers stable inductance characteristics. Active product status and ROHS3 compliance ensure long-term availability and regulatory alignment.

DRA124-331-R (Eaton - Electronics Division): This option features the lowest DC resistance (892 mOhm), reducing power dissipation compared to the original specification. Current rating of 690 mA is below the original 780 mA rating and should be selected only when circuit current requirements do not exceed 690 mA. Extended operating temperature range (-40°C ~ 165°C) supports high-temperature applications. AEC-Q200 automotive qualification indicates enhanced reliability screening. Shielded wirewound construction maintains electromagnetic isolation.

UP2-331-R (Eaton - Electronics Division): This substitute features an unshielded design, reducing package height (5.86mm vs. 4.50mm) and altering the footprint dimensions (13.74mm x 8.76mm vs. 12.50mm x 12.50mm). Current rating (760 mA) is marginally below the original specification. DC resistance (977.5 mOhm) remains within acceptable tolerance. Selection of this part requires verification that circuit layout accommodates the different footprint and that unshielded operation does not introduce unacceptable EMI coupling. Operating temperature range is not specified.

Frequently Asked Questions (FAQ)

Q: Can DR124-331-R be used as a direct replacement for SCRH124-331?

A: Yes. DR124-331-R meets or exceeds all critical electrical parameters: identical inductance (330 µH), matching tolerance (±20%), equivalent DC resistance (990 mOhm Max), and higher current rating (830 mA vs. 780 mA). Identical package footprint (12.50mm x 12.50mm) and height (4.50mm) ensure PCB compatibility. Shielded construction preserves EMI performance. Both parts are Active status with ROHS3 compliance.

Q: What is the key difference between DRA124-331-R and the original SCRH124-331?

A: DRA124-331-R has a lower current rating (690 mA vs. 780 mA) and reduced DC resistance (892 mOhm vs. 990 mOhm Max). The primary advantage is extended operating temperature range (-40°C ~ 165°C vs. -40°C ~ 125°C) and AEC-Q200 automotive qualification. This part is suitable only for applications where circuit current does not exceed 690 mA.

Q: Why is UP2-331-R listed as a substitute if it has different dimensions?

A: UP2-331-R maintains the critical electrical specifications: 330 µH inductance, ±20% tolerance, and comparable DC resistance (977.5 mOhm Max). However, the unshielded design and different footprint (13.74mm x 8.76mm) and height (5.86mm) require PCB layout verification. This part is a functional electrical equivalent but not a mechanical drop-in replacement. Selection requires confirmation that the circuit does not depend on shielding and that board space accommodates the larger height.

Q: Are all substitute parts RoHS compliant?

A: Yes. DR124-331-R and DRA124-331-R are ROHS3 compliant. UP2-331-R is RoHS compliant. All parts meet regulatory requirements for lead-free and restricted substance elimination.

Q: Which substitute offers the best thermal performance?

A: DRA124-331-R provides the lowest DC resistance (892 mOhm), resulting in the lowest I²R power dissipation at rated current. This reduces heat generation compared to the original part (990 mOhm) and DR124-331-R (990 mOhm Max). However, DRA124-331-R's lower current rating (690 mA) must be verified against circuit requirements.

Q: Can UP2-331-R be used in high-EMI environments?

A: No. UP2-331-R is unshielded, making it unsuitable for applications requiring electromagnetic isolation. The original SCRH124-331 and shielded substitutes (DR124-331-R, DRA124-331-R) provide shielded construction for EMI-sensitive circuits.