SCRH125-221 Equivalent & Substitute Parts

Part Overview

The SCRH125-221 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 electronics applications across the -40°C to 125°C operating temperature range.

Substitute parts are identified when equivalent inductance values, current ratings, shielding characteristics, and mounting specifications align within acceptable engineering tolerances, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

SCRH125-221

Signal TransformerIn Stock: 974SCRH125-221 Datasheet

Current PartRFQ

CDRH127NP-221MC

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CDRH127NP-221MC qualifies as an equivalent substitute based on the following alignment of critical parameters:

Matched Specifications:

• Inductance: 220 µH (identical)
• Inductance Tolerance: ±20% (identical)
• Shielding: Shielded (identical)
• Mounting Type: Surface Mount (identical)
• Inductance Test Frequency: 1 kHz (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Acceptable Variations:

• Current Rating: 1.16 A (substitute) vs. 1.29 A (main part) — substitute meets minimum threshold for applications rated at or below 1.16 A
• DC Resistance: 390mOhm Max (substitute) vs. 400mOhm Max (main part) — substitute exhibits lower resistive loss
• Operating Temperature: -40°C ~ 100°C (substitute) vs. -40°C ~ 125°C (main part) — substitute suitable for applications within -40°C to 100°C range
• Physical Dimensions: 12.00mm x 12.00mm x 8.00mm (substitute) vs. 12.50mm x 12.50mm x 6.00mm (main part) — both nonstandard packages; footprint compatibility requires PCB layout verification

Parameter Comparison

Engineering Selection Recommendations

Primary Selection Criteria:

1. Current Requirement: If circuit design requires continuous current above 1.16 A, the SCRH125-221 is the only suitable option. If maximum circuit current is 1.16 A or below, CDRH127NP-221MC is acceptable.

2. Operating Temperature: If application operates above 100°C, the SCRH125-221 is required. For applications within -40°C to 100°C, CDRH127NP-221MC is suitable.

3. Physical Space Constraints: The CDRH127NP-221MC has a smaller footprint (12.00mm x 12.00mm) but greater height (8.00mm vs. 6.00mm). Verify PCB layout accommodates the taller profile and smaller base dimensions.

4. Regulatory Compliance: Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, satisfying standard industrial compliance requirements.

5. Electrical Performance: The CDRH127NP-221MC exhibits lower DC resistance (390mOhm vs. 400mOhm), resulting in reduced power dissipation and improved efficiency in equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can CDRH127NP-221MC replace SCRH125-221 in all applications?

A: No. Substitution is valid only when both conditions are met: (1) circuit maximum current does not exceed 1.16 A, and (2) operating temperature remains within -40°C to 100°C. Applications requiring higher current or elevated temperature operation require the SCRH125-221.

Q: What is the impact of the 10 mOhm difference in DC resistance?

A: The CDRH127NP-221MC exhibits 2.5% lower DC resistance, resulting in proportionally reduced resistive losses and heat generation. This represents improved performance in applications sensitive to power dissipation.

Q: Are the physical dimension differences critical?

A: Yes. The CDRH127NP-221MC is 0.50mm smaller in footprint but 2.00mm taller. PCB layout must accommodate the increased height. The smaller footprint may provide space benefits in compact designs if vertical clearance is available.

Q: Do packaging format differences affect component performance?

A: No. Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging formats are assembly logistics considerations only. Electrical and mechanical performance is identical regardless of packaging format.

Q: Which part should be selected for new designs?

A: Selection depends on application requirements. For designs with current requirements up to 1.16 A and operating temperatures to 100°C, either part is acceptable. The CDRH127NP-221MC offers superior DC resistance performance. For designs requiring higher current or extended temperature operation, the SCRH125-221 is mandatory.

Q: Are both parts currently available?

A: Yes. SCRH125-221 has 933 pieces in stock; CDRH127NP-221MC has 1810 pieces in stock. Both maintain Active product status.