KEMET SH-122 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The KEMET SH-122 is a through-hole mounted common mode choke (CMC) designed for power line filtering applications. This 2-line CMC provides 1.5 µH inductance at 100 kHz with a 3A current rating and 20 mOhm maximum DC resistance. The component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are required for circuit redesign, inventory management, or component availability constraints.

Substiute Parts

SH-122

KEMETIn Stock: 1057SH-122 Datasheet

Current PartRFQ

SH-322

KEMETIn Stock: 1296SH-322 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KEMET SH-122 are identified based on strict equivalence of the following critical parameters:

Mandatory Matching Parameters:

• Manufacturer: KEMET
• Series: SH
• Filter Type: Power Line
• Number of Lines: 2
• Current Rating (Max): 3A
• DC Resistance (Max): 20 mOhm
• Voltage Rating - DC: 50V
• Operating Temperature Range: -25°C to 80°C
• Mounting Type: Through Hole
• Package / Case: Vertical, 4 PC Pin
• RoHS Status: RoHS3 Compliant
• Product Status: Active

Variable Parameter (Allows Substitution):

• Inductance @ Frequency: Different inductance values within the same product family are permitted when all other parameters remain constant.

The KEMET SH-322 qualifies as a parametric equivalent because it maintains all mandatory matching parameters while offering a different inductance specification (7.5 µH @ 100 kHz instead of 1.5 µH @ 100 kHz).

Parameter Comparison

Engineering Selection Recommendations

SH-122 Selection Criteria: The KEMET SH-122 is selected when a 1.5 µH inductance value at 100 kHz is required for power line common mode filtering. This part is Active status with full RoHS3 compliance and is suitable for applications requiring lower inductance filtering characteristics within the 3A current envelope.

SH-322 Selection Criteria: The KEMET SH-322 is selected when a 7.5 µH inductance value at 100 kHz is required for power line common mode filtering. This part is Active status with full RoHS3 compliance and is suitable for applications requiring higher inductance filtering characteristics within the same 3A current envelope and mechanical footprint.

Compliance & Certification: Both parts maintain identical compliance profiles: RoHS3 compliant, REACH unaffected, and ECCN EAR99 classification. Both are classified as Active products with continuous manufacturer support.

Mechanical & Electrical Compatibility: Both parts share identical through-hole mounting configuration, vertical 4-pin package orientation, physical dimensions (12.5mm x 10.00mm x 10.00mm height), current rating (3A), DC resistance (20 mOhm maximum), and voltage rating (50V DC). Operating temperature range is identical (-25°C to 80°C).

Frequently Asked Questions (FAQ)

Q: Can SH-322 be used as a direct replacement for SH-122?

A: SH-322 can be used as a substitute only if the circuit design accommodates the higher inductance value (7.5 µH versus 1.5 µH at 100 kHz). All other electrical and mechanical parameters are equivalent. Circuit simulation or testing is required to confirm performance in the specific application.

Q: What is the primary difference between SH-122 and SH-322?

A: The inductance specification differs. SH-122 provides 1.5 µH at 100 kHz, while SH-322 provides 7.5 µH at 100 kHz. All other parameters—current rating, DC resistance, voltage rating, temperature range, mounting type, and package configuration—are identical.

Q: Are both parts suitable for the same PCB layout?

A: Yes. Both SH-122 and SH-322 share identical physical dimensions (12.5mm L x 10.00mm W x 10.00mm height) and vertical 4-pin through-hole package configuration. PCB footprints are interchangeable from a mechanical standpoint.

Q: What compliance certifications apply to both parts?

A: Both SH-122 and SH-322 are RoHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Both maintain Active product status with KEMET.

Q: Is there an inventory advantage to selecting one part over the other?

A: Current inventory levels are provided for reference: SH-122 has 1037 pieces in stock, while SH-322 has 1187 pieces in stock. Inventory availability should be confirmed at time of procurement.

Q: Can these parts be used in applications exceeding 3A current?

A: No. Both parts are rated for a maximum current of 3A. Applications requiring higher current ratings require alternative component selection outside this product family.

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

A: Both SH-122 and SH-322 operate within the range of -25°C to 80°C. Applications requiring extended temperature ranges require alternative component selection.