RFS-50V2R2MF3#5 Equivalent & Substitute Parts

Part Overview

The RFS-50V2R2MF3#5 is a 2.2 µF 50 V aluminum electrolytic capacitor in radial can package manufactured by Elna America. This component is rated for 1000 hours at 85°C and is designed for audio applications. The part carries an obsolete product status, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Capacitance	2.2 µF
Tolerance	±20%
Voltage - Rated	50 V
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Lead Spacing	0.098" (2.50mm)
Size / Dimension	0.248" Dia (6.30mm)
Height - Seated (Max)	0.433" (11.00mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the RFS-50V2R2MF3#5 is determined by the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 2.2 µF (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Lead Spacing: 0.098" (2.50mm) (exact match required)
Size / Dimension: 0.248" Dia (6.30mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)

Allowable Variation Parameters:

Voltage - Rated: May be equal or higher than 50 V
Lifetime @ Temperature: May be equal or higher than 1000 Hrs @ 85°C
Operating Temperature Range: May be equal or extended beyond -40°C ~ 85°C
ESR (Equivalent Series Resistance): Not specified for main part; variations acceptable
Ripple Current: May vary within application requirements

Substitute parts are grouped into two categories: direct upgrades (higher voltage rating with same form factor) and equivalent alternatives (same electrical and mechanical specifications from different manufacturers).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp	Lead Spacing	Size Dia	Height (Max)	Product Status
RFS-50V2R2MF3#5	Elna America	2.2 µF	50 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.248" (6.30mm)	0.433" (11.00mm)	Obsolete
RFS-100V2R2MF3#5	Elna America	2.2 µF	100 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.248" (6.30mm)	0.433" (11.00mm)	Active
SEK2R2M160ST	Cornell Dubilier Electronics (CDE)	2.2 µF	160 V	±20%	2000 Hrs @ 105°C	-40°C ~ 105°C	0.098" (2.50mm)	0.248" (6.30mm)	0.433" (11.00mm)	Active
SEK2R2M200ST	Cornell Dubilier Electronics (CDE)	2.2 µF	200 V	±20%	2000 Hrs @ 105°C	-40°C ~ 105°C	0.098" (2.50mm)	0.248" (6.30mm)	0.453" (11.50mm)	Active
SEK2R2M250ST	Cornell Dubilier Electronics (CDE)	2.2 µF	250 V	±20%	2000 Hrs @ 105°C	-40°C ~ 105°C	0.098" (2.50mm)	0.248" (6.30mm)	0.453" (11.50mm)	Active
UFG1H2R2MDM	Nichicon	2.2 µF	50 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.079" (2.00mm)	0.197" (5.00mm)	0.492" (12.50mm)	Obsolete
UKW1H2R2MDD	Nichicon	2.2 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.079" (2.00mm)	0.197" (5.00mm)	0.433" (11.00mm)	Obsolete
UPW2C2R2MED	Nichicon	2.2 µF	160 V	±20%	2000 Hrs @ 105°C	-40°C ~ 105°C	0.098" (2.50mm)	0.248" (6.30mm)	0.433" (11.00mm)	Obsolete
UPW2D2R2MED	Nichicon	2.2 µF	200 V	±20%	2000 Hrs @ 105°C	-40°C ~ 105°C	0.098" (2.50mm)	0.248" (6.30mm)	0.433" (11.00mm)	Obsolete

Engineering Selection Recommendations

Direct Upgrade (Same Manufacturer): RFS-100V2R2MF3#5 from Elna America is the primary upgrade path. It maintains identical form factor and lead spacing while providing double the voltage rating. Product status is Active, ensuring long-term availability and supply chain stability.

Cross-Manufacturer Substitutes (Matching Form Factor): Parts from Cornell Dubilier Electronics (SEK series) and Nichicon (UPW series) with 0.098" lead spacing and 0.248" diameter provide direct mechanical and electrical compatibility. These parts offer higher voltage ratings and extended lifetime specifications. All listed substitutes are ROHS3 compliant and REACH unaffected.

Non-Compatible Alternatives: UFG1H2R2MDM and UKW1H2R2MDD from Nichicon do not meet the mandatory lead spacing and size requirements (0.079" spacing, 0.197" diameter, and 0.492" height). These parts are not suitable substitutes despite matching capacitance and voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can I use RFS-100V2R2MF3#5 as a direct replacement? A: Yes. RFS-100V2R2MF3#5 maintains identical mechanical dimensions, lead spacing, and form factor. The higher voltage rating (100 V vs 50 V) provides additional design margin without affecting circuit board layout or mounting requirements.

Q: Are the Cornell Dubilier SEK series parts compatible? A: SEK2R2M160ST, SEK2R2M200ST, and SEK2R2M250ST are mechanically compatible with identical lead spacing (0.098") and diameter (0.248"). Height varies slightly for 200 V and 250 V ratings (0.453" vs 0.433"), but both fit standard through-hole PCB layouts. All are ROHS3 compliant.

Q: What is the difference between Nichicon UPW and UFG series? A: UPW2C2R2MED and UPW2D2R2MED are compatible substitutes with matching lead spacing and form factor. UFG1H2R2MDM is not compatible due to different lead spacing (0.079" vs 0.098") and smaller diameter (0.197" vs 0.248").

Q: Can I use a higher voltage rated capacitor in place of the 50 V part? A: Yes, provided all other parameters match: capacitance, tolerance, lead spacing, size, and mounting type. Higher voltage ratings do not affect circuit operation in applications designed for lower voltages.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements.

Q: What is the impact of different lifetime ratings? A: The original part is rated 1000 Hrs @ 85°C. Substitute parts with 2000 Hrs @ 105°C ratings provide extended operational life under higher temperature conditions. This represents an improvement over the original specification.

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