RFS-35V100ME3#5 Equivalent & Substitute Parts

Part Overview

The RFS-35V100ME3#5 is a 10 µF, 35 V aluminum electrolytic capacitor in radial, can package manufactured by Elna America. This component is part of the RFS/SILMIC II series and is rated for 1000 hours at 85°C, with applications in audio circuits. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity.

Key Parameters

Parameter	Value
Capacitance	10 µF
Voltage Rating	35 V
Tolerance	±20%
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Ripple Current @ 120 Hz	35 mA
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-35V100ME3#5 is determined by the following critical parameters:

Core Electrical Parameters:

Capacitance: 10 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 35 V minimum (equal or higher voltage ratings are acceptable)
Polarization: Polar (exact match required)

Physical Parameters:

Lead Spacing: 0.079" (2.00 mm) (exact match required for through-hole compatibility)
Case Diameter: 0.197" (5.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

Environmental & Reliability Parameters:

Operating Temperature Range: -40°C ~ 85°C minimum (equal or wider range acceptable)
Lifetime @ Temperature: 1000 Hrs @ 85°C minimum (equal or longer lifetime acceptable)
RoHS Status: ROHS3 Compliant (required)

Substitute parts are grouped into two categories: Direct Equivalents (matching 35 V rating) and Upgrades (higher voltage ratings or improved thermal performance). All substitutes maintain identical physical dimensions and electrical specifications within the tolerance band.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Ripple Current @ 120 Hz	Height (Max)	Status
RFS-35V100ME3#5	Elna America	10 µF	35 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	35 mA	0.492" (12.50 mm)	Obsolete
UKT1V100MDD	Nichicon	10 µF	35 V	±20%	1000 Hrs @ 105°C	-55°C ~ 105°C	41 mA	0.433" (11.00 mm)	Obsolete
515D106M035JA6AE3	Vishay Sprague	10 µF	35 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	36 mA	0.433" (11.00 mm)	Obsolete
515D106M050JA6AE3	Vishay Sprague	10 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	44 mA	0.433" (11.00 mm)	Obsolete
515D106M063JA6AE3	Vishay Sprague	10 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	70 mA	0.433" (11.00 mm)	Obsolete
517D106M050JA6AE3	Vishay Sprague	10 µF	50 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	50 mA	0.433" (11.00 mm)	Obsolete
EEU-EB1H100S	Panasonic	10 µF	50 V	±20%	5000 Hrs @ 105°C	-40°C ~ 105°C	27 mA	0.472" (12.00 mm)	Active
EEU-EB1J100S	Panasonic	10 µF	63 V	±20%	5000 Hrs @ 105°C	-40°C ~ 105°C	30 mA	0.472" (12.00 mm)	Active
EEU-FC1H100L	Panasonic	10 µF	50 V	±20%	1000 Hrs @ 105°C	-55°C ~ 105°C	81.25 mA	0.472" (12.00 mm)	Active
UFW1H100MDD	Nichicon	10 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	65 mA	0.492" (12.50 mm)	Obsolete
UFW1J100MDD	Nichicon	10 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	70 mA	0.492" (12.50 mm)	Obsolete

Engineering Selection Recommendations

Direct Equivalent (35 V Rating):

UKT1V100MDD (Nichicon) is the primary direct equivalent. It maintains the 35 V voltage rating and ±20% tolerance. The part offers improved thermal performance with 1000 Hrs @ 105°C rating and extended operating temperature range (-55°C ~ 105°C). Physical dimensions differ slightly (0.433" height vs. 0.492"), which may require PCB layout verification. RoHS3 compliance is maintained.

515D106M035JA6AE3 (Vishay Sprague) is an alternative direct equivalent with identical voltage rating. This part provides doubled lifetime (2000 Hrs @ 85°C) and maintains the same operating temperature range as the original. Height is reduced to 0.433", requiring layout confirmation.

Upgrade Options (Higher Voltage Ratings):

For applications requiring enhanced voltage margin or improved reliability, the following upgrades are available:

515D106M050JA6AE3 (Vishay Sprague, 50 V) provides 2000 Hrs @ 85°C lifetime with 43% higher voltage rating. Physical footprint is identical to the 35 V variant (0.433" height).

EEU-EB1H100S (Panasonic, 50 V) is an active product with 5000 Hrs @ 105°C lifetime and extended temperature range (-40°C ~ 105°C). This part offers the longest operational life among available substitutes. Height is 0.472", requiring PCB verification.

EEU-FC1H100L (Panasonic, 50 V) is an automotive-grade part (AEC-Q200 rated) with 1000 Hrs @ 105°C and extended temperature range (-55°C ~ 105°C). This part is suitable for applications requiring automotive qualification.

UFW1H100MDD (Nichicon, 50 V) maintains the original height (0.492") and provides 2000 Hrs @ 85°C lifetime. This part is recommended when PCB layout constraints prevent height reduction.

Higher Voltage Upgrades (63 V):

515D106M063JA6AE3 (Vishay Sprague, 63 V) and UFW1J100MDD (Nichicon, 63 V) provide 80% voltage margin increase with 2000 Hrs @ 85°C lifetime. EEU-EB1J100S (Panasonic, 63 V) offers the longest lifetime (5000 Hrs @ 105°C) among 63 V options and is an active product.

Selection Criteria:

For direct replacement with minimal design change: UKT1V100MDD or 515D106M035JA6AE3
For improved reliability and extended life: EEU-EB1H100S or EEU-EB1J100S (Panasonic active products)
For automotive applications: EEU-FC1H100L (AEC-Q200 rated)
For height-constrained designs: 515D106M050JA6AE3 or 517D106M050JA6AE3
For maximum voltage margin: 515D106M063JA6AE3, UFW1J100MDD, or EEU-EB1J100S

All recommended substitutes are ROHS3 compliant and maintain through-hole radial can package configuration with 0.079" (2.00 mm) lead spacing and 0.197" (5.00 mm) case diameter.

Frequently Asked Questions (FAQ)

Q: Can I use a higher voltage-rated capacitor as a substitute?

A: Yes. A capacitor with a higher voltage rating (50 V or 63 V) can replace the 35 V RFS-35V100ME3#5 in the same circuit. Higher voltage ratings provide additional safety margin and do not affect circuit operation. The capacitance, tolerance, and physical dimensions must remain within specification.

Q: What is the difference between the Panasonic EB-A series and other substitutes?

A: The Panasonic EEU-EB1H100S and EEU-EB1J100S are active products with significantly extended lifetime (5000 Hrs @ 105°C vs. 1000-2000 Hrs for obsolete parts). These parts offer superior long-term reliability and are recommended for new designs or applications requiring extended service life.

Q: Do all substitutes have the same physical dimensions?

A: No. Most Vishay Sprague 515D and 517D series parts have a reduced height of 0.433" compared to the original 0.492". Panasonic EB-A and FC series parts have a height of 0.472". UFW series parts maintain the original 0.492" height. PCB layout must be verified before substitution if height is critical.

Q: Is the Panasonic EEU-FC1H100L suitable for non-automotive applications?

A: Yes. The EEU-FC1H100L is automotive-qualified (AEC-Q200) but can be used in general-purpose applications. The automotive qualification indicates higher reliability standards and is not restrictive for other uses.

Q: What does "Obsolete" status mean for substitute parts?

A: Obsolete status indicates the manufacturer has discontinued production. However, inventory remains available from authorized distributors. For long-term production continuity, active products such as Panasonic EEU-EB1H100S, EEU-EB1J100S, or EEU-FC1H100L are recommended.

Q: Can I mix different substitute parts in the same circuit?

A: Yes, provided all parts meet the minimum electrical specifications (10 µF, ±20%, 35 V minimum, -40°C ~ 85°C minimum). However, using identical part numbers throughout a design is recommended for consistency and traceability.

Q: What is the significance of ripple current ratings?

A: Ripple current indicates the maximum AC current the capacitor can handle at specified frequency without exceeding temperature limits. Higher ripple current capability (e.g., EEU-FC1H100L at 81.25 mA @ 120 Hz) allows operation in higher-current applications. The original RFS-35V100ME3#5 is rated for 35 mA @ 120 Hz.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All recommended substitutes are ROHS3 compliant, meeting environmental and hazardous substance restrictions.

Q: What is the difference between lifetime ratings at 85°C and 105°C?

A: Lifetime rating indicates the expected operational duration before capacitance degradation reaches 80% of initial value. Higher temperature ratings (105°C) reflect the capacitor's ability to maintain performance in elevated-temperature environments. Parts rated for 1000 Hrs @ 105°C (such as UKT1V100MDD) can operate reliably at higher ambient temperatures compared to parts rated only at 85°C.

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