KEMET SS26V-R300038 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The KEMET SS26V-R300038 is a 2-line common mode choke (CMC) designed for power line filtering applications. This through-hole component operates at 3.8 mH inductance @ 1 kHz with a maximum current rating of 3A and 100 mOhm DC resistance. The part is ROHS3 compliant and maintains active product status, making it suitable for EMI/RFI suppression in power distribution circuits.

Substitute parts are identified when equivalent electrical performance can be maintained within the allowed parameter tolerances for the application category, or when alternative inductance values serve comparable filtering functions at the same current rating and voltage specifications.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	SS26V-R300038	—
Manufacturer	KEMET	—
Series	SS	—
Filter Type	Power Line	—
Number of Lines	2	—
Inductance @ Frequency	3.8 mH @ 1 kHz	mH
Current Rating (Max)	3A	A
DC Resistance (DCR) (Max)	100 mOhm	mOhm
Voltage Rating - AC	250V	V
Operating Temperature	-25°C ~ 120°C	°C
Mounting Type	Through Hole	—
Size / Dimension	26.00mm L x 20.50mm W	mm
Height (Max)	30.50mm	mm
Package / Case	Vertical, 4 PC Pin	—
RoHS Status	ROHS3 Compliant	—
REACH Status	REACH Unaffected	—
Product Status	Active	—

Substitute Part Grouping Explanation

Substitution eligibility for the SS26V-R300038 is determined by the following critical parameters:

Primary Substitution Criteria:

Filter Type: Power Line
Number of Lines: 2
Current Rating (Max): 3A or higher
DC Resistance (DCR) (Max): 100 mOhm or lower
Voltage Rating - AC: 250V minimum
Operating Temperature Range: -25°C ~ 120°C minimum
Mounting Type: Through Hole
Package / Case: Vertical, 4 PC Pin
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected
Product Status: Active

Inductance Tolerance: Substitute parts may vary in inductance value (2.8 mH to 7.1 mH @ 1 kHz) while maintaining the same current and voltage specifications. Selection depends on the specific filtering frequency requirements of the application.

Physical Compatibility: Substitute parts are grouped by footprint size. The SS26V base series maintains a 26.00mm x 20.50mm x 30.50mm envelope. The SS30V base series uses a larger 31.00mm x 22.50mm x 33.00mm envelope and is compatible with applications allowing increased board space.

Parameter Comparison

Part Number	Inductance @ 1 kHz	Current Rating (Max)	DCR (Max)	Size (L x W x H)	Base Series	Inventory Status
SS26V-R300038	3.8 mH	3A	100 mOhm	26.00 x 20.50 x 30.50 mm	SS26V	1165 Pcs
SS26V-300028	2.8 mH	3A	100 mOhm	26.00 x 20.50 x 30.50 mm	SS26V	997 Pcs
SS30V-300054	5.4 mH	3A	120 mOhm	31.00 x 22.50 x 33.00 mm	SS30V	1171 Pcs
SS30V-R350047	4.7 mH	3.5A	100 mOhm	31.00 x 22.50 x 33.00 mm	SS30V	1065 Pcs
SS30V-R300071	7.1 mH	3A	120 mOhm	31.00 x 22.50 x 33.00 mm	SS30V	1013 Pcs

Engineering Selection Recommendations

SS26V-300028 (2.8 mH @ 1 kHz): Direct footprint equivalent with identical current rating and DCR specification. Suitable for applications requiring lower inductance filtering. Maintains SS26V form factor for space-constrained designs. ROHS3 compliant and active product status.

SS30V-R350047 (4.7 mH @ 1 kHz, 3.5A): Larger footprint with increased current capacity (3.5A vs. 3A). Inductance value between the main part and higher-inductance alternatives. Maintains 100 mOhm DCR specification. Requires additional board space (31.00mm x 22.50mm x 33.00mm). ROHS3 compliant and active product status.

SS30V-300054 (5.4 mH @ 1 kHz): Larger footprint with higher inductance for enhanced low-frequency filtering. DCR increases to 120 mOhm. Suitable for applications where increased filtering performance justifies larger envelope and slightly higher resistance. ROHS3 compliant and active product status.

SS30V-R300071 (7.1 mH @ 1 kHz): Maximum inductance option within the substitute group. Larger footprint with 120 mOhm DCR. Provides strongest low-frequency attenuation. Requires significant board space increase. ROHS3 compliant and active product status.

All substitute parts maintain 250V AC voltage rating, -25°C ~ 120°C operating temperature range, through-hole mounting, vertical 4-pin package configuration, and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can SS26V-300028 replace SS26V-R300038 in all applications?

A: SS26V-300028 is a direct footprint substitute with identical current rating (3A), DCR (100 mOhm), voltage rating (250V AC), and operating temperature range. The inductance difference (2.8 mH vs. 3.8 mH @ 1 kHz) affects filtering frequency response. Substitution is valid only when the lower inductance value meets the application's EMI/RFI suppression requirements.

Q: What is the physical difference between SS26V and SS30V series?

A: SS26V parts measure 26.00mm L x 20.50mm W x 30.50mm H. SS30V parts measure 31.00mm L x 22.50mm W x 33.00mm H. The larger SS30V envelope accommodates higher inductance values and, in the case of SS30V-R350047, increased current capacity. Board layout must accommodate the larger footprint.

Q: Does higher inductance always provide better filtering?

A: Higher inductance provides greater attenuation at lower frequencies. However, selection must balance inductance value against current rating, DCR losses, and physical space constraints. SS30V-R300071 (7.1 mH) offers maximum filtering but requires the largest footprint and accepts 120 mOhm DCR versus 100 mOhm in the main part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SS26V-300028, SS30V-300054, SS30V-R350047, SS30V-R300071) are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the main part SS26V-R300038.

Q: What does DCR (DC Resistance) affect in common mode choke selection?

A: DCR determines resistive losses in the inductor coil. Lower DCR reduces power dissipation and heat generation. The main part and SS26V-300028 specify 100 mOhm DCR. SS30V-300054 and SS30V-R300071 specify 120 mOhm DCR. Applications with tight thermal budgets or high continuous current should prioritize lower DCR values.

Q: Can SS30V-R350047 be used where SS26V-R300038 is specified?

A: SS30V-R350047 is electrically compatible (3.5A current rating exceeds the 3A requirement, 100 mOhm DCR matches specification, 250V AC voltage rating matches, operating temperature range matches). However, the larger physical footprint (31.00mm x 22.50mm x 33.00mm vs. 26.00mm x 20.50mm x 30.50mm) requires board layout verification. The 4.7 mH inductance differs from the original 3.8 mH specification.

Q: What inventory considerations apply to these substitutes?

A: All substitute parts maintain active product status with current stock levels: SS26V-300028 (997 Pcs), SS30V-300054 (1171 Pcs), SS30V-R350047 (1065 Pcs), SS30V-R300071 (1013 Pcs). Availability supports design flexibility and supply chain continuity.

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