KEMET SH-312 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The KEMET SH-312 is a 2-line common mode choke (CMC) designed for power line filtering applications. This through-hole mounted component operates at 7.5 µH inductance at 100 kHz with a maximum current rating of 3A and 30 mOhm DC resistance. The part is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, enabling component selection flexibility based on availability, inventory levels, or specific parameter optimization within the allowed specification range.

Substiute Parts

SH-312

KEMETIn Stock: 1021SH-312 Datasheet

Current PartRFQ

SH-102

KEMETIn Stock: 984SH-102 Datasheet

Parametric EquivalentRFQ

SH-302

KEMETIn Stock: 4923SH-302 Datasheet

Parametric EquivalentRFQ

SH-311

KEMETIn Stock: 782SH-311 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KEMET SH-312 are identified based on the following criteria:

Mandatory Matching Parameters:

• Manufacturer: KEMET
• Series: SH
• Filter Type: Power Line
• Number of Lines: 2
• Current Rating (Max): 3A
• Voltage Rating - DC: 150V
• Operating Temperature: -25°C ~ 80°C
• Mounting Type: Through Hole
• Package / Case: Vertical, 4 PC Pin
• RoHS Status: ROHS3 Compliant
• Product Status: Active

Variable Parameters (Allowed to Differ):

• Inductance @ Frequency: 1.5 µH to 7.5 µH @ 100 kHz
• DC Resistance (DCR) (Max): 25 mOhm to 30 mOhm
• Physical Dimensions: Variations within form factor constraints

The SH-312 has three identified substitute parts: SH-102, SH-302, and SH-311. These parts maintain all mandatory electrical and mechanical specifications while offering different inductance values and DC resistance characteristics suitable for alternative circuit design requirements.

Parameter Comparison

Engineering Selection Recommendations

SH-302 (Primary Substitute for SH-312): The SH-302 maintains identical inductance (7.5 µH @ 100 kHz) and voltage rating (150V) as the SH-312 while offering improved DC resistance (26 mOhm versus 30 mOhm). Both parts share the same physical dimensions (0.492" L x 0.394" W, 0.472" H). The SH-302 is Active product status with ROHS3 compliance and represents the most direct electrical equivalent. Inventory availability is significantly higher (4866 pcs versus 967 pcs for SH-312).

SH-311 (Intermediate Inductance Substitute): The SH-311 provides 3.2 µH inductance at 100 kHz with superior DC resistance (25 mOhm). This part shares identical physical dimensions with the SH-312 (0.551" L x 0.472" W, 0.374" H) and maintains all compliance certifications. Selection of SH-311 is appropriate when circuit design permits intermediate inductance values between 3.2 µH and 7.5 µH.

SH-102 (Lower Inductance Substitute): The SH-102 operates at 1.5 µH inductance at 100 kHz with 26 mOhm DC resistance. This part is suitable for applications requiring lower inductance filtering characteristics. Physical dimensions differ (0.492" L x 0.394" W, 0.472" H), and all electrical ratings and compliance certifications remain equivalent to SH-312.

All substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can SH-302 be used as a direct replacement for SH-312?

A: Yes. The SH-302 maintains identical inductance (7.5 µH @ 100 kHz), current rating (3A), voltage rating (150V), and mounting configuration (Through Hole, Vertical 4 PC Pin). DC resistance is lower (26 mOhm versus 30 mOhm), which is a performance improvement. Physical dimensions differ slightly but remain within the same form factor category.

Q: What is the primary difference between SH-312 and SH-311?

A: The primary difference is inductance value. SH-312 operates at 7.5 µH @ 100 kHz, while SH-311 operates at 3.2 µH @ 100 kHz. DC resistance is also lower on SH-311 (25 mOhm versus 30 mOhm). Both parts share identical physical dimensions and all other electrical specifications.

Q: When should SH-102 be selected instead of SH-312?

A: SH-102 should be selected when circuit design requires lower inductance filtering (1.5 µH @ 100 kHz). All other electrical parameters—current rating, voltage rating, operating temperature, and compliance certifications—remain equivalent. Physical dimensions are smaller.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SH-312, SH-302, SH-311, and SH-102 are all ROHS3 compliant with Active product status.

Q: What is the impact of DC resistance differences among these parts?

A: DC resistance values range from 25 mOhm (SH-311) to 30 mOhm (SH-312). Lower DC resistance reduces power dissipation and heat generation during operation. Selection should account for thermal management requirements and power budget constraints specific to the application.

Q: Do all substitute parts use the same through-hole mounting configuration?

A: Yes. All parts (SH-312, SH-302, SH-311, SH-102) use Vertical, 4 PC Pin through-hole mounting, ensuring PCB layout compatibility.

Q: What is the voltage rating for all substitute parts?

A: All parts maintain a DC voltage rating of 150V, ensuring equivalent electrical safety margins across the substitute group.