SC3DM-222 Equivalent & Substitute Parts

Part Overview

The SC3DM-222 is a 2.2 mH shielded surface mount inductor manufactured by Signal Transformer, rated for 170 mA maximum current with 9.2Ohm DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates across the industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SC3DM-222

Signal TransformerIn Stock: 1018SC3DM-222 Datasheet

Current PartRFQ

SRR6603-222ML

Bourns Inc.In Stock: 5021SRR6603-222ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC3DM-222 is determined by the following critical parameters:

• Inductance value: 2.2 mH (primary electrical specification)
• Current rating: Minimum 170 mA to maintain circuit performance
• DC resistance: Maximum 9.2Ohm to preserve circuit efficiency
• Shielding: Required for electromagnetic containment
• Surface mount configuration: Mandatory for PCB compatibility
• Operating temperature range: Must support -40°C to 125°C minimum
• Package dimensions: Nonstandard form factor with maximum height of 3.10mm

The SRR6603-222ML meets these substitution criteria with compatible inductance, shielding, mounting type, and thermal operating range. Physical dimensions remain within acceptable tolerance for board-level integration.

Parameter Comparison

Engineering Selection Recommendations

The SRR6603-222ML from Bourns Inc. is the qualified substitute for the obsolete SC3DM-222. Both components share identical inductance values, shielding architecture, and surface mount configuration. The substitute maintains ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility.

The SRR6603-222ML exhibits superior inductance tolerance (±20% versus ±30%) and lower DC resistance (8.5Ohm versus 9.2Ohm maximum), providing improved circuit performance characteristics. The extended operating temperature range (-55°C to 125°C) offers broader thermal coverage than the original part.

Current rating represents the primary design consideration: the substitute is rated for 100 mA maximum versus the original 170 mA specification. Circuit designs operating at or below 100 mA current levels are fully compatible with this substitution. Applications requiring current levels between 100 mA and 170 mA require alternative component evaluation.

Physical dimensions are compatible within standard PCB assembly tolerances, with negligible differences in length (0.10mm) and height (0.10mm).

Frequently Asked Questions (FAQ)

Q: Can the SRR6603-222ML replace the SC3DM-222 in all applications?

A: Substitution is valid only for circuits operating at maximum currents of 100 mA or below. The original SC3DM-222 supports 170 mA operation; the substitute is rated for 100 mA maximum. Verify circuit current requirements before implementation.

Q: Are the physical dimensions compatible for PCB assembly?

A: Yes. The SRR6603-222ML dimensions (6.60mm x 4.40mm x 3.00mm) are compatible with the SC3DM-222 footprint (6.50mm x 4.40mm x 3.10mm). Differences of 0.10mm in length and height fall within standard PCB assembly tolerances.

Q: What are the compliance and certification differences?

A: Both parts maintain ROHS3 compliance, unlimited MSL rating, and EAR99 ECCN classification. No compliance barriers exist for substitution.

Q: How do the inductance tolerances affect circuit design?

A: The SRR6603-222ML provides tighter tolerance (±20%) compared to the SC3DM-222 (±30%), resulting in more predictable inductance values and improved circuit stability.

Q: What is the impact of lower DC resistance in the substitute?

A: The SRR6603-222ML exhibits 8.5Ohm maximum DCR versus 9.2Ohm for the original part. Lower resistance reduces power dissipation and heat generation, improving overall circuit efficiency.

Q: Does the substitute support the full operating temperature range of the original?

A: The SRR6603-222ML supports -55°C to 125°C, exceeding the original -40°C to 125°C range. Full thermal compatibility is maintained.