RFS-25V4R7ME3#5 Equivalent & Substitute Parts

Part Overview

The RFS-25V4R7ME3#5 is a 4.7 µF, 25 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 and production continuity. Substitute parts must maintain the same capacitance value, tolerance, and physical form factor while accommodating variations in voltage rating, lifetime specifications, and operating temperature ranges.

Key Parameters

Parameter	Value	Unit
Capacitance	4.7	µF
Tolerance	±20%	-
Voltage - Rated	25	V
Lifetime @ Temperature	1000 Hrs @ 85°C	-
Operating Temperature Range	-40°C ~ 85°C	-
Polarization	Polar	-
Lead Spacing	0.079" (2.00 mm)	-
Size / Dimension	0.197" Dia (5.00 mm)	-
Height - Seated (Max)	0.492" (12.50 mm)	-
Mounting Type	Through Hole	-
Package / Case	Radial, Can	-
Ripple Current @ Low Frequency	25 mA @ 120 Hz	-
RoHS Status	ROHS3 Compliant	-
Product Status	Obsolete	-

Substitute Part Grouping Explanation

Substitution of the RFS-25V4R7ME3#5 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Capacitance: 4.7 µF (exact match required)
Tolerance: ±20% (acceptable match)
Polarization: Polar (exact match required)
Lead Spacing: 0.079" (2.00 mm) (exact match required)
Size / Dimension: 0.197" Dia (5.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)

Voltage Rating Substitution Logic: Substitute parts with voltage ratings equal to or greater than 25 V are acceptable. Higher voltage ratings provide additional design margin and reliability.

Lifetime and Temperature Substitution Logic: Substitute parts with equal or extended lifetime specifications at their rated temperature are acceptable. Extended operating temperature ranges provide additional application flexibility.

Physical Dimension Tolerance: Height variations within the radial can package are acceptable provided the maximum seated height does not exceed the application's physical constraints. The main part specifies 0.492" (12.50 mm) maximum height; substitute parts with heights of 0.433" (11.00 mm), 0.472" (12.00 mm), or 0.512" (13.00 mm) are evaluated individually based on circuit board layout requirements.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Tolerance	Voltage (V)	Lifetime @ Temp	Operating Temp (°C)	Lead Spacing (mm)	Height Max (mm)	Product Status	RoHS Status
RFS-25V4R7ME3#5	Elna America	4.7	±20%	25	1000 Hrs @ 85°C	-40 ~ 85	2.00	12.50	Obsolete	ROHS3
EEU-EB1H4R7S	Panasonic	4.7	±20%	50	5000 Hrs @ 105°C	-40 ~ 105	2.00	12.00	Active	ROHS3
EEU-EB1J4R7S	Panasonic	4.7	±20%	63	5000 Hrs @ 105°C	-40 ~ 105	2.00	12.00	Active	ROHS3
EEU-FC1H4R7	Panasonic	4.7	±20%	50	1000 Hrs @ 105°C	-55 ~ 105	2.00	12.00	Active	ROHS3
SEK4R7M063ST	Cornell Dubilier Electronics	4.7	±20%	63	2000 Hrs @ 105°C	-55 ~ 105	2.00	13.00	Active	ROHS3
UKL1H4R7KDDANA	Nichicon	4.7	±10%	50	1000 Hrs @ 105°C	-40 ~ 105	2.00	11.00	Obsolete	ROHS3
UKT1E4R7MDD	Nichicon	4.7	±20%	25	1000 Hrs @ 105°C	-55 ~ 105	2.00	11.00	Obsolete	ROHS3
UKT1H4R7MDD	Nichicon	4.7	±20%	50	1000 Hrs @ 105°C	-55 ~ 105	2.00	11.00	Obsolete	ROHS3
UKT1V4R7MDD	Nichicon	4.7	±20%	35	1000 Hrs @ 105°C	-55 ~ 105	2.00	11.00	Obsolete	ROHS3
UKW1H4R7MDD	Nichicon	4.7	±20%	50	2000 Hrs @ 85°C	-40 ~ 85	2.00	11.00	Obsolete	ROHS3
UKW2A4R7MDD	Nichicon	4.7	±20%	100	2000 Hrs @ 85°C	-40 ~ 85	2.00	11.00	Obsolete	ROHS3

Engineering Selection Recommendations

Active Product Substitutes (Preferred for New Designs):

The following active products are recommended as primary substitutes:

EEU-EB1H4R7S (Panasonic EB-A Series): This part provides a direct upgrade with 50 V rating, extended lifetime of 5000 hours at 105°C, and expanded operating temperature range to 105°C. ROHS3 compliance and active product status ensure long-term availability. Physical dimensions are compatible with the original part.

EEU-EB1J4R7S (Panasonic EB-A Series): This part offers the highest voltage rating at 63 V with identical lifetime and temperature specifications as EEU-EB1H4R7S. Suitable for applications requiring additional voltage margin.

EEU-FC1H4R7 (Panasonic FC Series): This automotive-grade part (AEC-Q200 rated) provides 50 V rating with extended operating temperature range (-55°C to 105°C). Lifetime specification of 1000 hours at 105°C matches the original part's lifetime at 85°C. Higher ripple current capability (61.75 mA @ 120 Hz) supports demanding applications.

SEK4R7M063ST (Cornell Dubilier Electronics SEK Series): This part provides 63 V rating with 2000-hour lifetime at 105°C. Extended operating temperature range (-55°C to 105°C) and active product status support long-term production. Physical height of 13.00 mm requires verification against circuit board layout constraints.

Obsolete Product Substitutes (For Existing Designs Only):

The following obsolete products are listed as substitutes but are not recommended for new designs due to discontinued status:

UKT1E4R7MDD (Nichicon UKT Series): Exact voltage match (25 V) with identical capacitance and tolerance. Extended operating temperature range (-55°C to 105°C) and 1000-hour lifetime at 105°C provide improved reliability over the original part. Reduced height (11.00 mm) may provide circuit board layout advantages.

UKT1H4R7MDD (Nichicon UKT Series): 50 V rating with 1000-hour lifetime at 105°C. Extended operating temperature range and reduced height are compatible with the original part's physical constraints.

UKT1V4R7MDD (Nichicon UKT Series): 35 V rating provides voltage margin above the original 25 V specification. 1000-hour lifetime at 105°C and extended temperature range support audio applications.

UKW1H4R7MDD (Nichicon UKW Series): 50 V rating with 2000-hour lifetime at 85°C matches the original part's temperature specification. Extended lifetime provides improved reliability.

UKW2A4R7MDD (Nichicon UKW Series): 100 V rating with 2000-hour lifetime at 85°C. Highest voltage rating among all substitutes for applications requiring maximum voltage margin.

UKL1H4R7KDDANA (Nichicon UKL Series): 50 V rating with tighter tolerance (±10%) and 1000-hour lifetime at 105°C. Reduced height (11.00 mm) is compatible with the original part's physical constraints.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher voltage rating than the original RFS-25V4R7ME3#5?

A: Yes. Substitute parts with voltage ratings equal to or greater than 25 V are acceptable. Higher voltage ratings provide additional design margin and do not negatively affect circuit performance in applications designed for 25 V operation.

Q: What is the significance of the different lifetime specifications (1000 Hrs, 2000 Hrs, 5000 Hrs)?

A: Lifetime specifications indicate the expected operational duration at the stated temperature before capacitance degradation reaches specified limits. Extended lifetime specifications provide improved reliability and longer service life. Parts with 5000-hour or 2000-hour ratings are superior to the original 1000-hour specification.

Q: Are there physical dimension differences between the main part and substitute parts?

A: Yes. The original RFS-25V4R7ME3#5 specifies a maximum height of 12.50 mm. Substitute parts vary: EEU-EB1H4R7S and EEU-EB1J4R7 are 12.00 mm, SEK4R7M063ST is 13.00 mm, and Nichicon UKT and UKW series parts are 11.00 mm. Verify that substitute part heights do not exceed circuit board layout constraints before selection.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive 2011/65/EU, which restricts the use of specific hazardous materials in electrical and electronic equipment. All listed substitute parts are ROHS3 compliant, matching the original part's environmental compliance status.

Q: Why are some substitute parts listed as obsolete?

A: Obsolete parts are no longer manufactured and may have limited inventory availability. For new designs and long-term production, active products (EEU-EB1H4R7S, EEU-EB1J4R7S, EEU-FC1H4R7, SEK4R7M063ST) are recommended. Obsolete substitutes are listed for reference in existing designs where inventory exists.

Q: What is the difference between audio and general purpose applications?

A: Audio applications typically require lower ESR (Equivalent Series Resistance) and specific ripple current characteristics to minimize noise and distortion. General purpose applications have broader performance requirements. The original RFS-25V4R7ME3#5 is specified for audio; substitute parts designated for audio (Nichicon UKT and UKW series) maintain these characteristics, while general purpose parts (Panasonic EB-A series) are suitable for broader applications.

Q: Can I substitute a part with ±10% tolerance for the original ±20% tolerance part?

A: Yes. Tighter tolerance (±10%) is superior to the original ±20% tolerance and provides improved capacitance accuracy. The UKL1H4R7KDDANA offers ±10% tolerance and is a valid substitute.

Q: What is the significance of the AEC-Q200 rating on the EEU-FC1H4R7?

A: AEC-Q200 is an automotive industry qualification standard for passive components. This rating indicates the part meets stringent automotive reliability and performance requirements. The EEU-FC1H4R7 is suitable for automotive applications in addition to general industrial use.

Q: How do I determine which substitute part is best for my application?

A: Selection depends on application requirements: (1) For new designs, select active products (EEU-EB1H4R7S, EEU-EB1J4R7S, EEU-FC1H4R7, or SEK4R7M063ST); (2) Verify physical dimensions fit circuit board layout; (3) Confirm operating temperature range matches application requirements; (4) For audio applications, prioritize parts specified for audio use; (5) For automotive applications, select AEC-Q200 rated parts (EEU-FC1H4R7).

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