KEMET SC-03-30J Common Mode Choke Equivalent & Substitute Parts

Part Overview

The KEMET SC-03-30J is a 3 mH common mode choke designed for power line filtering applications. This through-hole mounted component operates at 3A maximum current with 110 mOhm DC resistance and is rated for 250V DC/AC operation across an operating temperature range of -40°C to 120°C. The part is ROHS3 compliant and maintains active product status. Substitute parts within the SC-J series provide alternative inductance values while maintaining core electrical and mechanical compatibility for applications requiring different filtering characteristics.

Substiute Parts

SC-03-30J

KEMETIn Stock: 1238SC-03-30J Datasheet

Current PartRFQ

SC-03-55J

KEMETIn Stock: 1046SC-03-55J Datasheet

Parametric EquivalentRFQ

SC-03-67J

KEMETIn Stock: 1154SC-03-67J Datasheet

Parametric EquivalentRFQ

SC-03-85J

KEMETIn Stock: 774SC-03-85J Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC-03-30J are selected from the KEMET SC-J series based on the following criteria:

Fixed Parameters (Must Match):

• Current Rating: 3A
• Voltage Rating: 250V DC / 250V AC
• Operating Temperature: -40°C to 120°C
• Mounting Type: Through Hole
• Number of Lines: 2
• Package / Case: Vertical, 4 PC Pin
• Series: SC-J
• Product Status: Active
• RoHS Status: ROHS3 Compliant

Variable Parameters (Allowed to Differ):

• Inductance @ Frequency (3 mH, 5.5 mH, 6.7 mH, 8.5 mH)
• DC Resistance (105 mOhm to 110 mOhm)
• Physical Dimensions (minor variations within tolerance)
• Measurement Frequency (10 kHz or 100 kHz)

The SC-03-30J can be substituted with SC-03-55J, SC-03-67J, or SC-03-85J when application requirements permit different inductance values while maintaining identical current handling, voltage ratings, and thermal specifications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the original SC-03-30J specification. Selection between SC-03-30J, SC-03-55J, SC-03-67J, and SC-03-85J is determined by the required inductance value for the specific power line filtering application. The SC-03-67J offers a marginal reduction in DC resistance (105 mOhm versus 110 mOhm), which may provide minor thermal benefits in high-current applications. Physical dimensions remain consistent across all variants, supporting direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can SC-03-55J replace SC-03-30J in my application?

A: Yes, provided your circuit design accommodates the higher inductance value of 5.5 mH. Both parts share identical current rating (3A), voltage rating (250V DC/AC), operating temperature range (-40°C to 120°C), and through-hole mounting configuration. Verify that the increased filtering effect does not negatively impact circuit performance.

Q: What is the difference between SC-03-67J and SC-03-85J?

A: SC-03-67J provides 6.7 mH inductance at 100 kHz with 105 mOhm DCR, while SC-03-85J provides 8.5 mH inductance at 10 kHz with 110 mOhm DCR. Both maintain 3A current rating and 250V voltage rating. The measurement frequency differs, reflecting the inductance characteristics at different operating frequencies.

Q: Are all substitute parts pin-compatible with SC-03-30J?

A: Yes. All parts in this substitution group use identical Vertical, 4 PC Pin packaging and through-hole mounting configuration, enabling direct board-level replacement without PCB modifications.

Q: Do substitute parts meet the same compliance standards?

A: Yes. SC-03-55J, SC-03-67J, and SC-03-85J are all ROHS3 compliant and maintain active product status, matching the regulatory profile of SC-03-30J.

Q: Which substitute part has the lowest DC resistance?

A: SC-03-67J offers the lowest maximum DC resistance at 105 mOhm, compared to 110 mOhm for SC-03-30J, SC-03-55J, and SC-03-85J.