SCRH125B-221 Equivalent & Substitute Parts

Part Overview

The SCRH125B-221 is a 220 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 1.29 A continuous current with a maximum DC resistance of 400mOhm. This component is designed for applications requiring fixed inductance in compact form factors with electromagnetic shielding. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial electronic assemblies. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within specified tolerance ranges.

Substiute Parts

SCRH125B-221

Signal TransformerIn Stock: 1010SCRH125B-221 Datasheet

Current PartRFQ

CDRH127NP-221MC

Sumida America Components Inc.In Stock: 1821CDRH127NP-221MC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH125B-221 is determined by strict alignment of the following critical parameters:

• Inductance Value: Must be 220 µH with ±20% tolerance
• Shielding Configuration: Must be shielded to maintain electromagnetic isolation
• Mounting Technology: Must be surface mount compatible
• Current Rating: Substitute must support minimum 1.16 A continuous current (within acceptable derating)
• DC Resistance: Must not exceed 390mOhm to maintain thermal performance
• Compliance: Must maintain RoHS3 compliance status
• Operating Temperature: Must support minimum -40°C to 100°C range

The CDRH127NP-221MC from Sumida America Components Inc. meets these substitution criteria with equivalent inductance, shielding, and surface mount configuration while maintaining compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the SCRH125B-221 and CDRH127NP-221MC maintain Active product status with full RoHS3 compliance and unlimited moisture sensitivity ratings, ensuring regulatory compliance for current and future applications. The CDRH127NP-221MC offers superior DC resistance performance at 390mOhm compared to the 400mOhm maximum of the SCRH125B-221, resulting in lower thermal dissipation. The Sumida substitute features a reduced footprint (12.00mm x 12.00mm versus 12.50mm x 12.50mm), which may provide layout advantages in space-constrained designs. The primary consideration is the current rating differential: the CDRH127NP-221MC is rated for 1.16 A versus 1.29 A for the Signal Transformer part. Applications operating at or near the 1.29 A specification should verify that the 1.16 A rating of the substitute provides adequate margin for the intended circuit. The operating temperature upper limit of 100°C for the Sumida part versus 125°C for the Signal Transformer part must be evaluated against application thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can the CDRH127NP-221MC directly replace the SCRH125B-221 in all applications?

A: Direct replacement is possible when circuit current requirements do not exceed 1.16 A and operating temperatures remain below 100°C. Applications requiring the full 1.29 A rating or temperatures above 100°C should retain the SCRH125B-221.

Q: What is the significance of the different package dimensions?

A: The CDRH127NP-221MC has a smaller lateral footprint (12.00mm x 12.00mm) but greater height (8.00mm versus 6.20mm). PCB layout compatibility must be verified for both horizontal and vertical clearances before substitution.

Q: Are both parts equally available?

A: Inventory levels differ between suppliers. The CDRH127NP-221MC shows higher stock availability (1810 Pcs) compared to the SCRH125B-221 (931 Pcs), which may influence procurement decisions.

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

A: The CDRH127NP-221MC exhibits lower DC resistance (390mOhm maximum) compared to the SCRH125B-221 (400mOhm maximum). This results in reduced resistive losses and lower heat generation, which is beneficial for thermal management.

Q: What packaging formats are available for each part?

A: The SCRH125B-221 is supplied in Tape & Reel (TR) format, while the CDRH127NP-221MC is available in Cut Tape (CT) and Digi-Reel® packaging. Procurement and assembly processes should account for these packaging differences.

Q: Do both parts meet the same compliance standards?

A: Both parts are RoHS3 compliant with MSL 1 (Unlimited) ratings and EAR99 export classification. Compliance requirements are equivalent between the two parts.