SCRH124B-220 Equivalent & Substitute Parts

Part Overview

The SCRH124B-220 is a 22 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 3 A continuous current with a maximum DC resistance of 66 mOhm. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation within the electrical and mechanical tolerances of alternative manufacturers' offerings.

Substiute Parts

SCRH124B-220

Signal TransformerIn Stock: 1099SCRH124B-220 Datasheet

Current PartRFQ

DRA124-220-R

Eaton - Electronics DivisionIn Stock: 2066DRA124-220-R Datasheet

MFR RecommendedRFQ

PA4303.223NLT

Pulse ElectronicsIn Stock: 2414PA4303.223NLT Datasheet

MFR RecommendedRFQ

UP2B-220-R

Eaton - Electronics DivisionIn Stock: 16278UP2B-220-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH124B-220 is determined by the following criteria:

Primary Substitution Parameters:

• Inductance value: 22 µH ±20% tolerance
• Mounting type: Surface Mount
• Package footprint: 12.50mm x 12.50mm base dimensions
• Shielding requirement: Shielded configuration
• Current rating: Minimum 2.44 A (allows operation within design margins)
• DC resistance: Maximum 75 mOhm (acceptable variance from 66 mOhm baseline)
• Operating temperature: Minimum -40°C to 85°C overlap
• RoHS3 compliance and MSL 1 rating

Substitute Parts Identified:

1. DRA124-220-R (Eaton - Electronics Division): Shielded wirewound inductor meeting all primary parameters with 2.44 A rating and 71 mOhm DCR.

2. PA4303.223NLT (Pulse Electronics): Shielded drum core wirewound inductor with ferrite core, 2.5 A rating, and 75 mOhm DCR.

3. UP2B-220-R (Eaton - Electronics Division): Unshielded drum core wirewound inductor with ferrite core, 2.8 A rating, and 61.7 mOhm DCR. Note: Unshielded configuration differs from primary part shielding requirement.

Parameter Comparison

Engineering Selection Recommendations

DRA124-220-R is the primary substitute option. It maintains shielded configuration, meets all footprint requirements, and operates within the specified temperature range. The 2.44 A current rating is lower than the primary part but remains within acceptable design margins for most applications. AEC-Q200 automotive qualification provides additional reliability assurance.

PA4303.223NLT is a secondary substitute option. It provides shielded operation with ferrite core construction and 2.5 A rating. The 75 mOhm DCR represents the maximum acceptable variance. Operating temperature range matches the primary part specification.

UP2B-220-R is suitable only for applications where unshielded operation is acceptable. The footprint dimensions (13.97mm x 10.41mm) differ from the primary part and may require PCB layout modification. The operating temperature maximum of 85°C is lower than the primary part specification and must be evaluated against application requirements.

All substitute parts maintain RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can DRA124-220-R be used as a direct replacement for SCRH124B-220?

A: DRA124-220-R is electrically compatible within design tolerances. The 2.44 A current rating is lower than the primary part's 3 A rating. Applications operating at or near 3 A maximum current must be evaluated to confirm operation within the substitute part's rating. Footprint dimensions are identical, enabling direct PCB substitution.

Q: What is the impact of the 71 mOhm DCR in DRA124-220-R versus the 66 mOhm DCR in SCRH124B-220?

A: The 5 mOhm difference represents approximately 7.6% increase in DC resistance. This results in proportionally higher resistive losses and heat dissipation. Applications with tight thermal budgets or high continuous current operation must account for this variance.

Q: Is PA4303.223NLT suitable for high-temperature applications?

A: PA4303.223NLT operates to 125°C maximum, matching the primary part specification. It is not suitable for applications requiring operation above 125°C. DRA124-220-R extends to 165°C and is the preferred choice for elevated temperature environments.

Q: Why is UP2B-220-R listed as a substitute if it is unshielded?

A: UP2B-220-R is included as a substitute option for applications where electromagnetic shielding is not a design requirement. The unshielded configuration may introduce EMI coupling in sensitive circuits. PCB layout modification is required due to footprint dimension differences (13.97mm x 10.41mm versus 12.50mm x 12.50mm). The operating temperature maximum of 85°C further restricts its applicability.

Q: Are all substitute parts available in Tape & Reel packaging?

A: All substitute parts listed are available in Tape & Reel (TR) packaging, consistent with the primary part packaging specification.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. DRA124-220-R additionally carries AEC-Q200 automotive qualification. All parts are classified as Active product status.