SC63CB-820 Equivalent & Substitute Parts

Part Overview

The SC63CB-820 is a 82 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring fixed inductance in compact form factors. This component is rated for 910 mA continuous current with a maximum DC resistance of 436 mOhm and operates across the industrial temperature range of -40°C to 125°C. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements such as higher current ratings, improved saturation characteristics, or extended temperature ranges.

Substiute Parts

SC63CB-820

Signal TransformerIn Stock: 1052SC63CB-820 Datasheet

Current PartRFQ

DR73-820-R

Eaton - Electronics DivisionIn Stock: 3201DR73-820-R Datasheet

MFR RecommendedRFQ

DRA74-820-R

Eaton - Electronics DivisionIn Stock: 1064DRA74-820-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC63CB-820 are qualified based on the following critical parameters:

• Inductance Value: All substitutes maintain 82 µH ±20% tolerance, ensuring functional equivalence in circuit operation
• Shielding: All substitutes are shielded, maintaining electromagnetic isolation requirements
• Mounting Type: All substitutes are surface mount compatible
• Operating Temperature Range: Substitutes operate within or exceed the -40°C to 125°C range
• Current Handling: Substitute parts maintain current ratings within acceptable operating margins (860 mA to 879 mA)
• DC Resistance: Substitute parts provide comparable or improved DCR performance (367 mOhm to 384 mOhm)
• Compliance: All substitutes maintain RoHS3 compliance and MSL 1 rating

The DR73-820-R and DRA74-820-R are manufacturer-recommended substitutes from Eaton - Electronics Division, both featuring ferrite or wirewound core construction with enhanced saturation current characteristics.

Parameter Comparison

Engineering Selection Recommendations

SC63CB-820 (Primary Part): Select when the original design specification requires the Signal Transformer SC63CB series and current inventory supports procurement timelines. This part maintains Active status with full RoHS3 compliance.

DR73-820-R (Eaton Substitute): This substitute provides improved saturation current performance (890 mA vs. 470 mA) and reduced DC resistance (384 mOhm vs. 436 mOhm). The drum core, wirewound construction offers enhanced thermal stability. Package dimensions increase to 7.60mm x 7.60mm, requiring PCB layout verification. Operating temperature remains -40°C to 125°C. Select when improved saturation margin and lower losses are design priorities and board space permits the larger footprint.

DRA74-820-R (Eaton Substitute): This substitute delivers the lowest DC resistance (367 mOhm) and highest saturation current (1.034 A) among the three options. Extended operating temperature range to -40°C to 165°C supports high-temperature applications. AEC-Q200 automotive qualification is included. Package dimensions are 7.60mm x 7.60mm x 4.35mm, the largest height among substitutes. Select for applications requiring extended temperature operation, automotive compliance, or maximum current headroom with minimal losses.

All substitutes maintain the required 82 µH inductance value, shielded construction, surface mount compatibility, and RoHS3 compliance necessary for direct functional replacement.

Frequently Asked Questions (FAQ)

Q: Can DR73-820-R and DRA74-820-R be used interchangeably with SC63CB-820?

A: Both Eaton substitutes are functionally equivalent for the 82 µH inductance requirement. However, package dimension differences must be verified against PCB layout constraints. DR73-820-R and DRA74-820-R both measure 7.60mm x 7.60mm in footprint compared to SC63CB-820 at 6.30mm x 6.20mm. Height differences also exist: DR73-820-R at 4.65mm and DRA74-820-R at 4.35mm versus SC63CB-820 at 4.60mm.

Q: What are the key differences in current handling between these parts?

A: SC63CB-820 is rated for 910 mA continuous current with 470 mA saturation current. DR73-820-R provides 860 mA continuous with 890 mA saturation. DRA74-820-R delivers 879 mA continuous with 1.034 A saturation. The DRA74-820-R offers the highest saturation margin, beneficial for transient current conditions.

Q: How do DC resistance values affect circuit performance?

A: Lower DC resistance reduces power dissipation and heat generation. SC63CB-820 specifies 436 mOhm maximum. DR73-820-R provides 384 mOhm, and DRA74-820-R provides 367 mOhm. In applications with sustained current near rated limits, the lower resistance of Eaton substitutes reduces thermal stress.

Q: Are all three parts RoHS3 compliant?

A: Yes. SC63CB-820, DR73-820-R, and DRA74-820-R all maintain ROHS3 compliance with MSL 1 (unlimited moisture sensitivity) rating, supporting standard manufacturing and storage conditions.

Q: Which substitute is recommended for extended temperature applications?

A: DRA74-820-R operates to 165°C maximum, exceeding the -40°C to 125°C range of SC63CB-820 and DR73-820-R. This extended range supports high-temperature industrial and automotive environments. DRA74-820-R also carries AEC-Q200 automotive qualification.

Q: What PCB design considerations apply when substituting parts?

A: Footprint and height differences require PCB layout verification. SC63CB-820 occupies 6.30mm x 6.20mm with 4.60mm height. Both Eaton substitutes use 7.60mm x 7.60mm footprints. DRA74-820-R reaches 4.35mm height, requiring clearance verification in confined spaces. Thermal management may improve with lower-resistance substitutes due to reduced power dissipation.