KEMET SN20P-240 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The KEMET SN20P-240 is a 2-line common mode choke designed for power line filtering applications. This through-hole mounted component delivers 40 µH inductance at 100 kHz with a maximum DC resistance of 0.0100 ohm, supporting applications requiring 20.0 A current capacity. The part maintains Active product status with ROHS3 compliance and operates across the temperature range of -25°C to 105°C. Substitute parts are identified for applications where alternative inductance values, current ratings, or DC resistance specifications align with system requirements.

Key Parameters

Parameter	SN20P-240 Specification
Manufacturer	KEMET
Series	SN
Filter Type	Power Line
Number of Lines	2
Inductance @ 100 kHz	40 µH
Current Rating (Max)	20.0 A
DC Resistance (DCR) (Max)	0.0100 ohm
Mounting Type	Through Hole
Package / Case	Vertical, No Base, 2 PC Pin
Operating Temperature	-25°C ~ 105°C
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the SN20P-240 are selected based on compatibility within the KEMET SN series common mode choke product line. All substitute candidates maintain the following core parameters:

Manufacturer: KEMET
Series: SN
Filter Type: Power Line
Number of Lines: 2
Mounting Type: Through Hole
Package / Case: Vertical, No Base, 2 PC Pin
Operating Temperature: -25°C ~ 105°C
RoHS Status: ROHS3 Compliant
Product Status: Active

Substitution logic is determined by the inductance value at 100 kHz, current rating capacity, and DC resistance specification. Applications requiring different inductance-to-current ratios or lower/higher DC resistance characteristics may select alternative part numbers from this grouping. Each substitute maintains identical mechanical mounting compatibility and environmental operating specifications.

Parameter Comparison

Part Number	Inductance @ 100 kHz	Current Rating (Max)	DC Resistance (Max)	Packaging	Inventory (Pcs)
SN20P-240	40 µH	20.0 A	0.0100 ohm	Tray	994
SN12-800	250 µH	5.0 A	0.0600 ohm	Tray	1090
SN12HP-2201	20 µH	10.0 A	0.0130 ohm	Tray	1155
SN14P-300J	80 µH	15.0 A	0.0150 ohm	Bulk	1071
SN16P-130	10 µH	10.0 A	0.0050 ohm	Tray	1027
SN3-100	2.5 µH	3.0 A	0.0250 ohm	Bulk	1136
SN3-300	20 µH	0.5 A	0.1500 ohm	Bulk	1332
SN5-1700	12 µH	2.0 A	0.0480 ohm	Bulk	1360
SN5-5501	80 µH	1.0 A	0.2000 ohm	Bulk	1247
SN5-700	140 µH	0.9 A	0.2500 ohm	Bulk	1036

Engineering Selection Recommendations

Selection of substitute parts for the SN20P-240 must be based on the specific inductance, current, and resistance requirements of the target application. All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original component.

For applications requiring higher inductance values: SN14P-300J (80 µH), SN12-800 (250 µH), and SN5-700 (140 µH) provide increased filtering capability at the cost of reduced current capacity.

For applications requiring lower inductance values: SN16P-130 (10 µH), SN5-1700 (12 µH), SN12HP-2201 (20 µH), and SN3-100 (2.5 µH) accommodate circuits with lower inductance specifications.

For applications requiring minimal DC resistance: SN16P-130 (0.0050 ohm) offers the lowest resistance profile among substitutes, suitable for high-current, low-loss applications.

For applications requiring higher current capacity: The SN20P-240 itself provides the maximum current rating of 20.0 A within this substitute group.

Packaging format (Tray vs. Bulk) should be verified against procurement and assembly requirements. All parts operate within the identical temperature range of -25°C to 105°C and maintain through-hole mounting compatibility.

Frequently Asked Questions (FAQ)

Q: Can SN12HP-2201 replace SN20P-240 in my circuit?

A: SN12HP-2201 is mechanically and environmentally compatible but differs in electrical specifications. It provides 20 µH inductance (versus 40 µH), supports 10.0 A current (versus 20.0 A), and exhibits 0.0130 ohm DC resistance (versus 0.0100 ohm). Substitution is valid only if your application tolerates these parameter differences.

Q: What is the primary difference between Tray and Bulk packaging options?

A: Packaging format affects procurement and assembly handling. Tray packaging (SN20P-240, SN12-800, SN12HP-2201, SN16P-130) is typically used for automated assembly processes. Bulk packaging (SN14P-300J, SN3-100, SN3-300, SN5-1700, SN5-5501, SN5-700) is used for manual assembly or alternative handling methods. Electrical and mechanical specifications remain identical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the SN20P-240.

Q: Which substitute offers the lowest DC resistance?

A: SN16P-130 provides the lowest DC resistance at 0.0050 ohm, compared to SN20P-240 at 0.0100 ohm. This part is suitable for applications prioritizing minimal power loss, though it supports only 10.0 A current versus the original 20.0 A.

Q: Can I use SN5-5501 as a substitute if I need 80 µH inductance?

A: SN5-5501 provides 80 µH inductance but supports only 1.0 A current and exhibits 0.2000 ohm DC resistance. Substitution is valid only if your application requires these lower current and higher resistance specifications. SN14P-300J offers 80 µH at 15.0 A with 0.0150 ohm resistance as an alternative.

Q: Do all substitute parts operate at the same temperature range?

A: Yes. All substitute parts operate across -25°C to 105°C, matching the SN20P-240 operating temperature specification.

Q: What determines whether a part is a valid substitute?

A: Valid substitution depends on circuit requirements for inductance value, maximum current capacity, and acceptable DC resistance. All substitute parts share identical mounting type (through-hole), package configuration (vertical, no base, 2 PC pin), series designation (SN), and environmental compliance. Verify that your application can operate with the specific inductance-to-current-to-resistance combination of the candidate substitute part.

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