FE2X10-5-2 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The FE2X10-5-2 is a 2-line common mode choke manufactured by Pulse Electronics, rated for 1.6A maximum current with 260mOhm DC resistance. This through-hole component operates across -40°C to 125°C and is rated for 250V AC. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	FE2X10-5-2
Manufacturer	Pulse Electronics
Series	FE2X
Product Status	Obsolete
Number of Lines	2
Current Rating (Max)	1.6A
DC Resistance (Max)	260mOhm
Voltage Rating - AC	250V
Operating Temperature	-40°C ~ 125°C
Mounting Type	Through Hole
Package / Case	Vertical, 4 PC Pin
Moisture Sensitivity Level	1 (Unlimited)
Size / Dimension	1.079" L x 0.724" W (27.41mm x 18.39mm)
Height (Max)	1.197" (30.40mm)

Substitute Part Grouping Explanation

Substitution eligibility for the FE2X10-5-2 is determined by the following critical parameters:

Number of Lines: Must be 2-line configuration
Mounting Type: Must be through-hole
Package / Case: Must be vertical, 4 PC pin
Current Rating: Must meet or exceed 1.6A
DC Resistance: Must not exceed 260mOhm
Voltage Rating - AC: Must support 250V AC minimum
Operating Temperature Range: Must encompass or exceed -40°C ~ 125°C
Moisture Sensitivity Level: Must be MSL 1 or equivalent

The substitute parts listed below meet these core electrical and mechanical criteria, enabling direct functional replacement in applications designed for the FE2X10-5-2.

Parameter Comparison

Parameter	FE2X10-5-2	FE2X10-6-2NL	ALFT-04-9	SS26V-R180123
Manufacturer	Pulse Electronics	Pulse Electronics	Abracon LLC	KEMET
Product Status	Obsolete	Active	Active	Active
Number of Lines	2	2	2	2
Current Rating (Max)	1.6A	1.8A	3A	1.8A
DC Resistance (Max)	260mOhm	240mOhm	40mOhm	300mOhm
Voltage Rating - AC	250V	250V	Not specified	250V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-25°C ~ 85°C	-25°C ~ 120°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
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable
Size / Dimension (L x W)	1.079" x 0.724" (27.41mm x 18.39mm)	1.276" x 0.724" (32.41mm x 18.39mm)	1.339" x 0.709" (34.00mm x 18.00mm)	1.024" x 0.807" (26.00mm x 20.50mm)
Height (Max)	1.197" (30.40mm)	1.394" (35.40mm)	1.251" (31.80mm)	1.201" (30.50mm)

Engineering Selection Recommendations

FE2X10-6-2NL (Pulse Electronics) is the primary parametric equivalent. It maintains the same series lineage, operating temperature range, and voltage rating as the FE2X10-5-2. Current rating increases to 1.8A with improved DC resistance of 240mOhm. Product status is active with full availability. This part is recommended for direct replacement in applications where the increased current capacity and lower resistance are acceptable.

ALFT-04-9 (Abracon LLC) provides the lowest DC resistance at 40mOhm and highest current rating at 3A. However, the operating temperature range is limited to -25°C ~ 85°C, which does not encompass the full -40°C lower bound of the original specification. AC voltage rating is not specified. This part is suitable only for applications operating within the -25°C ~ 85°C window.

SS26V-R180123 (KEMET) matches the 1.8A current rating and 250V AC voltage specification. DC resistance is 300mOhm, exceeding the original 260mOhm maximum by 40mOhm. Operating temperature range is -25°C ~ 120°C, which does not meet the -40°C lower bound. This part is suitable for applications with relaxed low-temperature requirements and acceptable resistance tolerance.

Frequently Asked Questions (FAQ)

Q: Can FE2X10-6-2NL directly replace FE2X10-5-2 in all applications?

A: FE2X10-6-2NL meets all core substitution criteria: 2-line configuration, through-hole mounting, vertical 4-pin package, 250V AC rating, and -40°C ~ 125°C operating range. The increased current rating (1.8A vs 1.6A) and lower DC resistance (240mOhm vs 260mOhm) are compatible with applications designed for the original part. Physical dimensions differ slightly; verify PCB layout clearance before implementation.

Q: Why does ALFT-04-9 have significantly lower DC resistance?

A: ALFT-04-9 is specified with 10 mH inductance at 1 kHz and is classified as a signal line filter, whereas the FE2X10-5-2 specifications do not include inductance data. The lower resistance reflects different core material and winding design optimized for signal-line applications. The -25°C ~ 85°C operating range is narrower than the original part.

Q: Is SS26V-R180123 compatible with the FE2X10-5-2?

A: SS26V-R180123 meets the 2-line, through-hole, 4-pin package, and 250V AC requirements. However, DC resistance is 300mOhm, which exceeds the original 260mOhm specification by 40mOhm. Operating temperature minimum is -25°C, not -40°C. Use this part only in applications where the higher resistance and limited low-temperature range are acceptable.

Q: What are the physical dimension differences among these parts?

A: FE2X10-5-2 measures 27.41mm L x 18.39mm W x 30.40mm H. FE2X10-6-2NL is larger at 32.41mm L x 18.39mm W x 35.40mm H. ALFT-04-9 is 34.00mm L x 18.00mm W x 31.80mm H. SS26V-R180123 is 26.00mm L x 20.50mm W x 30.50mm H. Verify PCB footprint and board clearance before selecting a substitute.

Q: Are all substitute parts RoHS compliant?

A: FE2X10-6-2NL is RoHS compliant. ALFT-04-9 is ROHS3 compliant. SS26V-R180123 is ROHS3 compliant. All parts carry ECCN EAR99 classification. Verify compliance requirements for your specific application and regulatory jurisdiction.

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