SC-03-55J Equivalent & Substitute Parts

Part Overview

The SC-03-55J is a common mode choke (CMC) manufactured by KEMET, designed for power line filtering applications. This through-hole component provides 5.5 mH inductance at 100 kHz with a 3A current rating and is classified as an active product. Common mode chokes are essential in power supply circuits to suppress electromagnetic interference (EMI) on two-line systems. Substitute parts may be required due to inventory constraints, design optimization for different inductance values, or application-specific filtering requirements.

Substiute Parts

SC-03-55J

KEMETIn Stock: 1046SC-03-55J Datasheet

Current PartRFQ

SC-03-30J

KEMETIn Stock: 1238SC-03-30J Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The SC-03-55J belongs to the KEMET SC-J series of common mode chokes. Substitution eligibility is determined by the following critical parameters:

• Number of Lines: Must remain 2-line configuration
• Mounting Type: Must be Through Hole
• Package / Case: Must be Vertical, 4 PC Pin
• Current Rating: Must support minimum 3A
• DC Resistance: Must not exceed 110 mOhm
• Voltage Rating: Must support minimum 250V DC and 250V AC
• Operating Temperature: Must cover -40°C to 120°C range
• Compliance: Must maintain ROHS3 and REACH Unaffected status

The SC-03-30J qualifies as a parametric equivalent substitute. While its inductance value differs (3 mH vs. 5.5 mH at 100 kHz), all other critical electrical and mechanical parameters remain identical, allowing it to function as an alternative in applications where the lower inductance value is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Both the SC-03-55J and SC-03-30J are active products with identical compliance certifications (ROHS3 Compliant, REACH Unaffected). Selection between these parts should be based on the specific inductance requirement of the application. The SC-03-55J provides higher inductance filtering at 5.5 mH, while the SC-03-30J offers lower inductance at 3 mH. Both parts maintain identical electrical ratings, thermal performance, and physical form factors, ensuring mechanical and thermal compatibility in through-hole PCB applications.

Frequently Asked Questions (FAQ)

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

A: SC-03-30J is mechanically and electrically compatible with SC-03-55J in terms of mounting, current handling, voltage rating, and thermal performance. However, the inductance difference (3 mH vs. 5.5 mH) affects EMI filtering characteristics. Substitution is valid only when the application's filtering requirements can be met with the lower inductance value.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both SC-03-55J and SC-03-30J share identical dimensions: 25.00 mm length, 20.00 mm width, and 27.00 mm maximum height. Both use Vertical, 4 PC Pin packaging, ensuring identical PCB footprint and mounting compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SC-03-55J and SC-03-30J are ROHS3 Compliant and REACH Unaffected, meeting identical regulatory requirements for use in regulated markets and applications.

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

A: The primary difference is inductance value. SC-03-55J provides 5.5 mH at 100 kHz, while SC-03-30J provides 3 mH at 100 kHz. All other parameters—current rating, DC resistance, voltage rating, temperature range, and physical form factor—remain identical.

Q: Are these parts suitable for high-temperature applications?

A: Yes. Both parts operate across the -40°C to 120°C temperature range, supporting industrial and automotive applications requiring extended thermal performance.