SCRH74-221 Equivalent & Substitute Parts

Part Overview

The SCRH74-221 is a 220 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 360 mA continuous current with a maximum DC resistance of 1.17Ohm. This component is designed for applications requiring fixed inductance in compact form factors with electromagnetic shielding. The part maintains Active product status and is RoHS3 compliant, making it suitable for modern electronic assemblies. Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while meeting application requirements.

Substiute Parts

SCRH74-221

Signal TransformerIn Stock: 1115SCRH74-221 Datasheet

Current PartRFQ

SPD74R-224M

API Delevan Inc.In Stock: 1352SPD74R-224M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH74-221 is based on the following critical parameters that must remain equivalent or superior:

• Inductance value: 220 µH at ±20% tolerance
• DC Resistance: 1.17Ohm maximum
• Shielding: Shielded construction required
• Mounting: Surface mount configuration
• Current handling: Minimum 360 mA rating
• Operating temperature: Minimum -40°C to 125°C range
• Compliance: RoHS3 and REACH status maintained

The substitute part SPD74R-224M meets these criteria with enhanced current saturation rating (600 mA versus 360 mA), identical inductance and DC resistance specifications, and equivalent environmental compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The SPD74R-224M qualifies as a direct substitute for the SCRH74-221 based on electrical parameter equivalence. Both components maintain identical inductance values, DC resistance specifications, and shielding characteristics. The substitute part demonstrates superior performance in current handling capacity (600 mA versus 360 mA) and extended low-temperature operating range (-55°C versus -40°C minimum), providing additional design margin without compromising the original application requirements.

Both parts maintain Active product status and full RoHS3 compliance with REACH unaffected designation, ensuring regulatory alignment for current and future manufacturing requirements. The substitute part is suitable for direct replacement in applications where the original SCRH74-221 is specified, provided that physical package dimensions are verified for PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: What electrical parameters must match for substitution? A: The inductance value (220 µH), DC resistance (1.17Ohm maximum), and current rating (minimum 360 mA) must remain equivalent. Shielding type and surface mount configuration are mandatory requirements.

Q: Can SPD74R-224M replace SCRH74-221 in all applications? A: Yes, provided that the physical dimensions are compatible with the PCB layout. The substitute part has slightly different footprint dimensions (7.30mm x 7.30mm versus 7.80mm x 7.80mm) and height (4.70mm versus 4.50mm), which must be verified during design review.

Q: What is the significance of the higher current rating on the substitute part? A: The SPD74R-224M's 600 mA saturation current provides additional design margin compared to the 360 mA rating of the SCRH74-221. This allows the substitute to operate with greater current headroom in the same application without saturation effects.

Q: Are compliance certifications identical between the two parts? A: Yes. Both parts are RoHS3 compliant, REACH unaffected, and maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent regulatory and environmental compliance.

Q: What is the impact of the extended temperature range on the substitute part? A: The SPD74R-224M operates from -55°C to 125°C compared to -40°C to 125°C for the SCRH74-221. This extended low-temperature capability provides additional operational margin for applications in extreme environments.