SC-03-85J Equivalent & Substitute Parts

Part Overview

The SC-03-85J is a Common Mode Choke (CMC) manufactured by KEMET, designed for power line filtering applications. This through-hole component provides 8.5 mH inductance at 10 kHz with a 3A current rating and 110mOhm maximum DC resistance. The part is Active status and ROHS3 compliant, making it suitable for modern electronic equipment requiring EMI suppression in two-line configurations. Substitute parts are identified within the SC-J series to accommodate varying inductance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

SC-03-85J

KEMETIn Stock: 774SC-03-85J Datasheet

Current PartRFQ

SC-03-30J

KEMETIn Stock: 1238SC-03-30J Datasheet

Parametric EquivalentRFQ

SC-03-55J

KEMETIn Stock: 1046SC-03-55J Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC-03-85J are identified based on strict parameter compatibility within the SC-J series. The following parameters must remain constant for substitution eligibility:

• Manufacturer: KEMET
• Series: SC-J
• Filter Type: Power Line
• Number of Lines: 2
• Current Rating (Max): 3A
• DC Resistance (Max): 110mOhm
• Voltage Rating - DC: 250V
• Voltage Rating - AC: 250V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Through Hole
• Size / Dimension: 0.984" L x 0.787" W (25.00mm x 20.00mm)
• Height (Max): 1.063" (27.00mm)
• Package / Case: Vertical, 4 PC Pin
• RoHS Status: ROHS3 Compliant

The variable parameter permitting substitution is Inductance @ Frequency. SC-03-30J and SC-03-55J provide alternative inductance values while maintaining all other electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SC-03-85J, SC-03-30J, and SC-03-55J—maintain Active product status and ROHS3 compliance. Selection between these components depends on the specific inductance requirement for the application circuit. The SC-03-85J provides the highest inductance value at 8.5 mH, while SC-03-30J offers the lowest at 3 mH, and SC-03-55J provides an intermediate value at 5.5 mH. All parts share identical current ratings, voltage ratings, DC resistance, operating temperature range, and physical dimensions, ensuring direct mechanical and electrical interchangeability within the specified inductance tolerance of the application.

Frequently Asked Questions (FAQ)

Q: Can SC-03-30J or SC-03-55J be used as direct replacements for SC-03-85J?

A: SC-03-30J and SC-03-55J are mechanically and electrically compatible with SC-03-85J in terms of current rating, voltage rating, DC resistance, operating temperature, and physical dimensions. However, they provide different inductance values. Selection must be based on the circuit's inductance requirement.

Q: What is the primary difference between these substitute parts?

A: The inductance value and measurement frequency differ. SC-03-85J provides 8.5 mH @ 10 kHz, SC-03-55J provides 5.5 mH @ 100 kHz, and SC-03-30J provides 3 mH @ 100 kHz. All other electrical and mechanical parameters remain identical.

Q: Are all three parts suitable for the same PCB layout?

A: Yes. All three parts share identical physical dimensions (0.984" L x 0.787" W x 1.063" H maximum), package configuration (Vertical, 4 PC Pin), and mounting type (Through Hole), ensuring compatibility with the same PCB footprint.

Q: Do these parts have the same compliance certifications?

A: Yes. All three parts are ROHS3 compliant and maintain Active product status, ensuring compliance with current regulatory requirements.

Q: What determines which substitute part to select?

A: The application circuit's inductance requirement determines the appropriate part selection. Choose based on the required inductance value and measurement frequency for your specific EMI filtering application.