SC1212-222 Equivalent & Substitute Parts

Part Overview

The SC1212-222 is a 2.2 mH shielded surface mount inductor manufactured by Signal Transformer, rated for 110 mA maximum current with 24.6Ohm DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SC1212-222

Signal TransformerIn Stock: 779SC1212-222 Datasheet

Current PartRFQ

4379R-225KS

API Delevan Inc.In Stock: 11524379R-225KS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC1212-222 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 2.2 mH (core functional requirement)
• Shielding: Shielded configuration (electromagnetic isolation requirement)
• Mounting type: Surface mount (assembly compatibility)
• Current rating: Must support minimum 110 mA operation
• DC resistance: Must not exceed 24.6Ohm to maintain circuit performance

Secondary Compatibility Factors:

• Operating temperature range must encompass -40°C to 125°C
• RoHS3 compliance for regulatory alignment
• Physical dimensions and height constraints for PCB layout fit

The 4379R-225KS meets the primary inductance and shielding requirements with equivalent surface mount configuration. However, the current rating differential (40 mA vs. 110 mA) and DC resistance increase (30Ohm vs. 24.6Ohm) represent functional limitations that must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The 4379R-225KS from API Delevan Inc. is an active product with confirmed availability (1078 pcs in stock), providing procurement continuity for the obsolete SC1212-222. Both components maintain ROHS3 compliance and unlimited moisture sensitivity ratings, ensuring regulatory and environmental compatibility.

The 4379R-225KS offers improved inductance tolerance (±10% vs. ±30%), supporting tighter circuit specifications. However, the reduced current rating (40 mA vs. 110 mA) and increased DC resistance (30Ohm vs. 24.6Ohm) establish functional boundaries. Selection of this substitute is appropriate only when circuit current requirements do not exceed 40 mA and the additional 6.5Ohm resistance does not compromise circuit performance.

Physical dimensions differ: the 4379R-225KS is larger in length (4.14mm vs. 4.60mm) and significantly taller (4.66mm vs. 2.30mm). PCB layout verification is required to confirm clearance compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 4379R-225KS directly replace the SC1212-222 in all applications?

A: Direct replacement is limited by current rating. The 4379R-225KS is rated for 40 mA maximum, while the SC1212-222 supports 110 mA. Substitution is valid only when circuit current remains below 40 mA. The increased DC resistance (30Ohm vs. 24.6Ohm) may also affect circuit performance in sensitive applications.

Q: What are the physical compatibility considerations?

A: The 4379R-225KS has different dimensions: 4.14mm length (vs. 4.60mm) and 4.66mm height (vs. 2.30mm). PCB layout must accommodate these larger footprint dimensions. The nonstandard package of the SC1212-222 versus the 2-SMD package of the 4379R-225KS may require footprint adjustment.

Q: Are both parts compliant with current regulatory standards?

A: Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Both carry MSL rating 1 (unlimited moisture sensitivity), eliminating moisture-related handling constraints.

Q: How do the inductance tolerances compare?

A: The 4379R-225KS provides tighter tolerance (±10%) compared to the SC1212-222 (±30%). This improved tolerance may benefit circuits requiring precise inductance values but does not affect substitution feasibility for applications tolerant of the original ±30% specification.

Q: What is the temperature operating range compatibility?

A: The 4379R-225KS extends the lower temperature limit to -55°C (vs. -40°C), providing broader low-temperature operation. Both parts support the upper limit of 125°C, maintaining full compatibility across the original operating range.