SC2506-331 Equivalent & Substitute Parts

Part Overview

The SC2506-331 is a 330 µH unshielded inductor manufactured by Signal Transformer, rated for 190 mA continuous current with a maximum DC resistance of 7.3Ohm. This component is classified as obsolete, making substitute parts necessary for new designs and production continuity. The part is surface-mounted in a nonstandard package measuring 9.25mm × 7.87mm with a seated height of 1.65mm, and is fully RoHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

SC2506-331

Signal TransformerIn Stock: 874SC2506-331 Datasheet

Current PartRFQ

UP1B-331-R

Eaton - Electronics DivisionIn Stock: 1145UP1B-331-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC2506-331 is determined by the following critical parameters:

• Inductance Value: 330 µH with ±20% tolerance
• Current Rating: Minimum 190 mA continuous current capability
• Saturation Current: Minimum 180 mA
• DC Resistance: Lower DCR values improve efficiency and reduce power loss
• Mounting Type: Surface mount configuration required
• Shielding: Unshielded topology maintained
• Compliance: RoHS and REACH compliance required for production use

The substitute part UP1B-331-R from Eaton - Electronics Division meets these substitution criteria with improved electrical performance characteristics while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The UP1B-331-R from Eaton - Electronics Division is the qualified substitute for the obsolete SC2506-331. Selection is based on the following engineering criteria:

Product Status: The SC2506-331 is obsolete, requiring transition to an active production part. The UP1B-331-R maintains active status with established supply chain availability.

Electrical Equivalence: Both parts maintain 330 µH inductance at ±20% tolerance and are tested at 100 kHz. The UP1B-331-R provides superior current handling (280 mA vs. 190 mA) and significantly lower DC resistance (3.1Ohm vs. 7.3Ohm), resulting in reduced power dissipation and improved thermal performance.

Compliance: Both parts meet RoHS requirements and carry unlimited MSL ratings, ensuring compatibility with standard manufacturing and storage conditions.

Physical Considerations: The UP1B-331-R is slightly smaller in footprint (8.89mm × 6.10mm vs. 9.25mm × 7.87mm) but has greater seated height (5.00mm vs. 1.65mm). PCB layout verification is required to confirm clearance compatibility.

Packaging: The UP1B-331-R is supplied in Tape & Reel format, suitable for automated assembly processes, whereas the SC2506-331 was supplied in bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can UP1B-331-R directly replace SC2506-331 in existing designs?

A: Electrical substitution is valid based on matching inductance value, tolerance, and test frequency. Physical layout verification is mandatory due to the increased seated height (5.00mm vs. 1.65mm). PCB clearance and component spacing must be confirmed before implementation.

Q: What are the key performance improvements of UP1B-331-R?

A: The substitute part offers 47% higher current rating (280 mA vs. 190 mA), 72% lower DC resistance (3.1Ohm vs. 7.3Ohm), and higher saturation current (310 mA vs. 180 mA). These improvements reduce power loss and thermal stress in the application circuit.

Q: Are there compliance differences between the two parts?

A: Both parts are RoHS compliant and carry unlimited MSL ratings. The SC2506-331 specifies RoHS3 compliance, while UP1B-331-R specifies RoHS compliance. Both meet current regulatory requirements for electronic component manufacturing.

Q: What is the impact of the different core materials?

A: The UP1B-331-R uses a ferrite drum core with wirewound construction, whereas the SC2506-331 core material is not specified. The ferrite core in the substitute part contributes to lower DC resistance and improved current handling characteristics.

Q: Is the nonstandard package size a concern for substitution?

A: Both parts use nonstandard packages. The UP1B-331-R footprint is slightly smaller laterally but significantly taller. Component placement and clearance to adjacent parts must be verified during PCB design review.

Q: What packaging format should be specified for production orders?

A: The UP1B-331-R is available in Tape & Reel (TR) format, which is standard for automated surface mount assembly. Confirm reel specifications and feeder compatibility with your assembly equipment.