RFS-50V2R2ME3#5 Equivalent & Substitute Parts

Part Overview

The RFS-50V2R2ME3#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 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and component sourcing.

Key Parameters

Parameter	Value
Capacitance	2.2 µF
Tolerance	±20%
Voltage Rating	50 V
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Lead Spacing	0.079" (2.00 mm)
Case Diameter	0.197" (5.00 mm)
Height (Seated Max)	0.492" (12.50 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RFS-50V2R2ME3#5 is determined by the following critical parameters:

Primary Substitution Criteria:

Capacitance: 2.2 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 50 V minimum (equal or higher voltage acceptable)
Lead Spacing: 0.079" (2.00 mm) (exact match required for PCB compatibility)
Case Diameter: 0.197" (5.00 mm) (exact match required for mechanical fit)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Polarization: Polar (exact match required)

Secondary Considerations:

Operating Temperature Range: Extended ranges provide design margin
Lifetime @ Temperature: Higher ratings indicate improved reliability
Ripple Current Ratings: Must meet or exceed application requirements
RoHS Compliance: ROHS3 compliance maintained across all substitutes

Substitute parts are grouped into two categories: Upgrade parts (active status with improved specifications) and Similar parts (obsolete status with comparable specifications).

Parameter Comparison

Parameter	RFS-50V2R2ME3#5	EEU-EB1H2R2S	EEU-FC1H2R2	UKT1H2R2MDD	UPW1H2R2MDD	UKW1H2R2MDD
Manufacturer	Elna America	Panasonic	Panasonic	Nichicon	Nichicon	Nichicon
Capacitance	2.2 µF	2.2 µF	2.2 µF	2.2 µF	2.2 µF	2.2 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
Voltage Rating	50 V	50 V	50 V	50 V	50 V	50 V
Lifetime @ Temperature	1000 Hrs @ 85°C	5000 Hrs @ 105°C	1000 Hrs @ 105°C	1000 Hrs @ 105°C	2000 Hrs @ 105°C	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 85°C
Lead Spacing	0.079" (2.00 mm)	0.079" (2.00 mm)	0.079" (2.00 mm)	0.079" (2.00 mm)	0.079" (2.00 mm)	0.079" (2.00 mm)
Case Diameter	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Height (Seated Max)	0.492" (12.50 mm)	0.472" (12.00 mm)	0.472" (12.00 mm)	0.433" (11.00 mm)	0.433" (11.00 mm)	0.433" (11.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Polarization	Polar	Polar	Polar	Polar	Polar	Polar
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Obsolete	Obsolete	Obsolete
Ripple Current @ 120 Hz	20 mA	15 mA	29.25 mA	20 mA	16.5 mA	23 mA

Engineering Selection Recommendations

Active Status Substitutes (Recommended for New Designs):

EEU-EB1H2R2S (Panasonic) is the primary upgrade option. This part maintains all critical electrical and mechanical parameters while offering extended lifetime (5000 hours at 105°C) and expanded operating temperature range (-40°C to 105°C). Active product status ensures long-term availability and supply chain stability. ROHS3 compliance is maintained.

EEU-FC1H2R2 (Panasonic) provides automotive-grade qualification (AEC-Q200) with active product status. Operating temperature range extends to -55°C to 105°C. Ripple current capability is enhanced at both low and high frequencies. This part is suitable for applications requiring automotive-grade reliability.

Obsolete Status Substitutes (Existing Design Support):

UKT1H2R2MDD (Nichicon) offers equivalent electrical performance with 1000-hour lifetime at 105°C and extended operating temperature range (-55°C to 105°C). Obsolete status indicates limited future availability.

UPW1H2R2MDD (Nichicon) provides improved lifetime (2000 hours at 105°C) and extended operating temperature range (-55°C to 105°C). Obsolete status indicates limited future availability.

UKW1H2R2MDD (Nichicon) maintains operating temperature range of -40°C to 85°C with 2000-hour lifetime at 85°C. Obsolete status indicates limited future availability.

Height Consideration: All substitute parts have reduced seated height (0.433" to 0.472" maximum) compared to the original part (0.492" maximum). This provides additional PCB clearance margin and is mechanically compatible with the original design.

Frequently Asked Questions (FAQ)

Q: Can EEU-EB1H2R2S directly replace RFS-50V2R2ME3#5 in existing designs?

A: Yes. The EEU-EB1H2R2S maintains all critical electrical parameters (2.2 µF, ±20%, 50 V) and mechanical specifications (lead spacing, case diameter, through-hole mounting, radial can package). The reduced height (0.472" vs. 0.492") provides additional clearance. ROHS3 compliance is maintained.

Q: What is the difference between the Panasonic EEU-EB1H2R2S and EEU-FC1H2R2 options?

A: Both are active Panasonic products with identical electrical ratings. EEU-FC1H2R2 includes AEC-Q200 automotive qualification and operates across a wider temperature range (-55°C to 105°C). EEU-EB1H2R2S offers superior lifetime rating (5000 hours at 105°C vs. 1000 hours at 105°C) and is suitable for general-purpose applications.

Q: Are the Nichicon UKT1H2R2MDD, UPW1H2R2MDD, and UKW1H2R2MDD interchangeable with the original part?

A: These parts are electrically and mechanically compatible with the RFS-50V2R2ME3#5. All maintain 2.2 µF capacitance, ±20% tolerance, 50 V rating, and identical lead spacing and case diameter. However, all three are classified as obsolete, limiting future availability.

Q: Does the reduced height of substitute parts affect PCB layout?

A: No. All substitute parts have maximum seated heights of 0.433" to 0.472", which are less than the original 0.492". This provides additional clearance above the component and is compatible with existing PCB designs.

Q: Which substitute part should be selected for new production designs?

A: EEU-EB1H2R2S is recommended for new designs. It is an active product with extended lifetime (5000 hours at 105°C), expanded operating temperature range (-40°C to 105°C), and guaranteed long-term supply availability. ROHS3 compliance is maintained.

Q: Can a 100 V rated capacitor substitute for the 50 V RFS-50V2R2ME3#5?

A: Higher voltage ratings are electrically compatible and provide design margin. However, EEU-FC2A2R2 (100 V) and UPW2A2R2MDD (100 V) have different electrical characteristics (impedance, ripple current) and are classified as different product variants. Use only if the 100 V rating is required by circuit design.

Q: What is the significance of RoHS3 compliance across all parts?

A: All listed parts, including the original RFS-50V2R2ME3#5 and all substitutes, are ROHS3 compliant. This ensures compatibility with environmental regulations and procurement requirements across all regions.

Q: Are there any ripple current differences between the original and substitute parts?

A: Yes. Ripple current ratings vary: RFS-50V2R2ME3#5 (20 mA @ 120 Hz), EEU-EB1H2R2S (15 mA @ 120 Hz), EEU-FC1H2R2 (29.25 mA @ 120 Hz), UPW1H2R2MDD (16.5 mA @ 120 Hz). Select substitutes based on application ripple current requirements.

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