SN8D-500JB Common Mode Choke Equivalent & Substitute Parts

Part Overview

The SN8D-500JB is a through-hole common mode choke (CMC) manufactured by KEMET, designed for power line filtering applications. This component features 125 µH inductance at 100 kHz with a 2A current rating and is classified as an active product with full RoHS3 compliance. The part is housed in a horizontal, 4-pin package configuration suitable for through-hole PCB assembly.

Substitute parts are identified when inventory constraints, lead time requirements, or design flexibility necessitate alternative components that maintain functional compatibility within the specified electrical and mechanical parameters of this product category.

Substiute Parts

SN8D-500JB

KEMETIn Stock: 695SN8D-500JB Datasheet

Current PartRFQ

SN8D-400JB

KEMETIn Stock: 1073SN8D-400JB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN8D-500JB is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

• Manufacturer: KEMET
• Series: SN
• Filter Type: Power Line
• Number of Lines: 2
• Current Rating (Max): 2A
• Mounting Type: Through Hole
• Package / Case: Horizontal, 4 PC Pin
• Operating Temperature Range: -25°C to 105°C
• RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

• Inductance @ Frequency: Within the SN series range
• DC Resistance (DCR) (Max): Within acceptable limits for the application class
• Height (Max): Consistent with horizontal, 4-pin package geometry

The SN8D-400JB qualifies as a parametric equivalent because it maintains all mandatory matching parameters while operating within the allowable inductance and DCR variation range established for KEMET SN series common mode chokes in the 2A, 2-line power line filtering category.

Parameter Comparison

Engineering Selection Recommendations

SN8D-500JB Selection Criteria:

• Primary choice when 125 µH inductance at 100 kHz is specified in circuit design
• Preferred when maximum inductance value within the SN series is required for EMI suppression
• Suitable for applications requiring higher impedance at the specified frequency

SN8D-400JB Selection Criteria:

• Acceptable substitute when circuit design permits 80 µH inductance at 100 kHz
• Lower DC resistance (85 mOhm vs. 100 mOhm) reduces power dissipation in the component
• Maintains identical current rating, thermal range, and mechanical footprint
• Both parts carry identical RoHS3 compliance and active product status

Both components are manufactured by KEMET within the same SN series and share identical mechanical and thermal specifications. Selection between these parts depends solely on the inductance requirement of the specific application circuit.

Frequently Asked Questions (FAQ)

Q: Can SN8D-400JB replace SN8D-500JB in any application?

A: SN8D-400JB is a parametric equivalent only when the circuit design permits operation with 80 µH inductance instead of 125 µH. The lower inductance value will result in reduced impedance at 100 kHz. Circuit validation is required to confirm functional compatibility.

Q: What is the difference in DC resistance between these parts?

A: SN8D-500JB has a maximum DCR of 100 mOhm, while SN8D-400JB has a maximum DCR of 85 mOhm. The lower resistance in SN8D-400JB results in reduced power dissipation and heat generation during operation at rated current.

Q: Are the physical dimensions identical?

A: Yes. Both parts feature identical height (0.854" / 21.70 mm) and package configuration (Horizontal, 4 PC Pin). They are mechanically interchangeable on the PCB.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SN8D-500JB and SN8D-400JB are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both maintain active product status with KEMET.

Q: What is the operating temperature range for both parts?

A: Both components operate across the identical temperature range of -25°C to 105°C, ensuring thermal compatibility in the same application environment.

Q: Are there any electrical performance differences beyond inductance and DCR?

A: The provided parameters specify only inductance at 100 kHz and maximum DCR. Both parts maintain identical current rating (2A), number of lines (2), and filter type (Power Line). Additional performance characteristics are not included in the provided specification data.