KEMET SH-311 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The KEMET SH-311 is a 2-line common mode choke (CMC) designed for power line filtering applications. This through-hole component operates at 3.2 µH inductance @ 100 kHz with a maximum current rating of 3A and 25 mOhm DC resistance. The SH-311 maintains active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified within the KEMET SH series to address inventory availability, specific inductance requirements, or DC resistance optimization for particular circuit designs.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	SH-311	—
Manufacturer	KEMET	—
Series	SH	—
Filter Type	Power Line	—
Number of Lines	2	—
Inductance @ Frequency	3.2 µH @ 100 kHz	—
Current Rating (Max)	3A	—
DC Resistance (DCR) (Max)	25 mOhm	—
Voltage Rating - DC	150V	—
Operating Temperature	-25°C ~ 80°C	—
Mounting Type	Through Hole	—
Size / Dimension	14.00mm L x 12.00mm W	—
Height (Max)	9.50mm	—
Package / Case	Vertical, 4 PC Pin	—
RoHS Status	RoHS3 Compliant	—
REACH Status	REACH Unaffected	—
Product Status	Active	—

Substitute Part Grouping Explanation

Substitute parts for the SH-311 are selected from the KEMET SH series based on strict parameter compatibility. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

Manufacturer: KEMET (same manufacturer)
Series: SH (same product family)
Number of Lines: 2 (identical configuration)
Current Rating (Max): 3A (identical current capacity)
Voltage Rating - DC: 150V (identical voltage specification)
Operating Temperature: -25°C ~ 80°C (identical temperature range)
Mounting Type: Through Hole (identical mounting)
Package / Case: Vertical, 4 PC Pin (identical package)
RoHS Status: RoHS3 Compliant (identical compliance)
REACH Status: REACH Unaffected (identical regulatory status)

Variable Parameters (Substitution Basis):

Inductance @ Frequency: 1.5 µH, 3.2 µH, or 7.5 µH @ 100 kHz
DC Resistance (DCR) (Max): 20 mOhm, 25 mOhm, or 26 mOhm
Physical Dimensions: 14.00mm x 12.00mm x 9.50mm (SH-311) or 12.5mm x 10.00mm x 12.00mm (SH-102, SH-202, SH-302)

The SH-311 substitutes are grouped by inductance value. Parts with different inductance ratings serve applications requiring lower or higher filtering characteristics. DC resistance variations reflect different core materials and winding configurations within the same electrical class.

Parameter Comparison

Parameter	SH-311	SH-102	SH-202	SH-302
Inductance @ Frequency	3.2 µH @ 100 kHz	1.5 µH @ 100 kHz	1.5 µH @ 100 kHz	7.5 µH @ 100 kHz
Current Rating (Max)	3A	3A	3A	3A
DC Resistance (DCR) (Max)	25 mOhm	26 mOhm	20 mOhm	26 mOhm
Voltage Rating - DC	150V	150V	150V	150V
Operating Temperature	-25°C ~ 80°C	-25°C ~ 80°C	-25°C ~ 80°C	-25°C ~ 80°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Vertical, 4 PC Pin	Vertical, 4 PC Pin	Vertical, 4 PC Pin	Vertical, 4 PC Pin
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active
Size / Dimension	14.00mm L x 12.00mm W	12.5mm L x 10.00mm W	12.5mm L x 10.00mm W	12.5mm L x 10.00mm W
Height (Max)	9.50mm	12.00mm	12.00mm	12.00mm

Engineering Selection Recommendations

All substitute parts maintain identical electrical ratings for current (3A), voltage (150V DC), and operating temperature (-25°C ~ 80°C). All parts are Active products with RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment across the entire substitute group.

Selection by Inductance Requirement:

SH-102 (1.5 µH @ 100 kHz): Use when lower inductance filtering is required. This part provides reduced common mode impedance compared to the SH-311. DC resistance is 26 mOhm, slightly higher than SH-311. Physical dimensions are smaller (12.5mm x 10.00mm x 12.00mm).

SH-202 (1.5 µH @ 100 kHz): Use when lower inductance filtering is required with optimized DC resistance. This part provides the lowest DC resistance (20 mOhm) among all substitutes, reducing power dissipation. Physical dimensions are identical to SH-102 (12.5mm x 10.00mm x 12.00mm).

SH-302 (7.5 µH @ 100 kHz): Use when higher inductance filtering is required. This part provides increased common mode impedance for enhanced EMI suppression. DC resistance is 26 mOhm. Physical dimensions are identical to SH-102 and SH-202 (12.5mm x 10.00mm x 12.00mm). Highest inventory availability (4866 pcs).

Physical Footprint Consideration: The SH-311 has a larger footprint (14.00mm x 12.00mm x 9.50mm) compared to SH-102, SH-202, and SH-302 (12.5mm x 10.00mm x 12.00mm). PCB layout compatibility must be verified before substitution.

Frequently Asked Questions (FAQ)

Q: Can SH-102 directly replace SH-311 in my circuit?

A: SH-102 is electrically compatible with SH-311 in terms of current rating (3A), voltage rating (150V DC), operating temperature range (-25°C ~ 80°C), and package type (Vertical, 4 PC Pin through-hole). However, SH-102 provides 1.5 µH inductance versus SH-311's 3.2 µH. This lower inductance reduces common mode filtering effectiveness. Substitution is valid only if your circuit design tolerates lower inductance filtering. Additionally, SH-102 has smaller physical dimensions (12.5mm x 10.00mm x 12.00mm) compared to SH-311 (14.00mm x 12.00mm x 9.50mm), which may affect PCB layout.

Q: What is the difference between SH-202 and SH-102 if both have 1.5 µH inductance?

A: Both SH-202 and SH-102 provide identical inductance (1.5 µH @ 100 kHz) and physical dimensions (12.5mm x 10.00mm x 12.00mm). The primary difference is DC resistance: SH-202 has 20 mOhm maximum DCR, while SH-102 has 26 mOhm maximum DCR. SH-202 is preferred when minimizing power dissipation is critical, as lower DC resistance reduces I²R losses in high-current applications.

Q: When should I use SH-302 instead of SH-311?

A: SH-302 provides 7.5 µH inductance, more than double the SH-311's 3.2 µH. Use SH-302 when your circuit requires enhanced common mode filtering or higher impedance at the operating frequency. SH-302 has the highest inventory availability (4866 pcs) among all substitutes. Physical dimensions are smaller than SH-311 (12.5mm x 10.00mm x 12.00mm versus 14.00mm x 12.00mm x 9.50mm).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. SH-311, SH-102, SH-202, and SH-302 are all RoHS3 compliant and REACH unaffected. All parts maintain identical regulatory status, ensuring compliance consistency across substitutions.

Q: Do physical dimension differences affect PCB compatibility?

A: Yes. SH-311 has dimensions of 14.00mm L x 12.00mm W x 9.50mm H. SH-102, SH-202, and SH-302 all have dimensions of 12.5mm L x 10.00mm W x 12.00mm H. The smaller footprint of the substitute parts may allow tighter PCB layout, but the increased height (12.00mm versus 9.50mm) must be verified against available vertical clearance. PCB hole spacing and mounting pad layout must be confirmed before substitution.

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

A: All substitute parts (SH-311, SH-102, SH-202, SH-302) have an identical maximum current rating of 3A. Current capacity does not vary across the substitute group.

Q: Can I use these parts interchangeably in production?

A: Interchangeability depends on circuit requirements. All parts share identical electrical ratings (3A, 150V DC, -25°C ~ 80°C), mounting type (through-hole), and package configuration (Vertical, 4 PC Pin). However, inductance values differ (1.5 µH, 3.2 µH, or 7.5 µH @ 100 kHz), which directly affects circuit performance. Physical dimensions also differ. Substitution requires circuit design verification to confirm that the alternative inductance value and physical footprint are acceptable for your application.

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