RFS-100V101MJ6#5 Equivalent & Substitute Parts

Part Overview

The RFS-100V101MJ6#5 is a 100 µF, 100 V aluminum electrolytic capacitor in radial, can package manufactured by Elna America as part of the RFS/SILMIC II series. This component is classified as obsolete and is designed for audio applications with a rated lifetime of 1000 hours at 85°C. Due to its obsolete status, equivalent and substitute parts with improved specifications or active production status are necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Capacitance	100 µF
Tolerance	±20%
Voltage - Rated	100 V
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Ripple Current @ 120 Hz	485 mA
Lead Spacing	0.295" (7.50 mm)
Size / Dimension	0.630" Dia (16.00 mm)
Height - Seated (Max)	0.984" (25.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the RFS-100V101MJ6#5 are categorized based on the following substitution criteria:

Similar Substitutes maintain identical or compatible electrical and mechanical specifications:

Capacitance: 100 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 100 V (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Lead Spacing and physical dimensions must accommodate PCB layout compatibility

Upgrade Substitutes provide enhanced performance characteristics while maintaining core electrical compatibility:

Higher voltage ratings (160 V, 200 V, 250 V) allow operation in circuits with higher voltage margins
Extended lifetime ratings (2000 Hrs @ 105°C, 8000 Hrs @ 105°C, 10000 Hrs @ 105°C) provide improved reliability
Higher operating temperature ranges (-40°C ~ 105°C) extend thermal operating envelope
Active product status ensures ongoing availability and supply chain support
Identical physical dimensions and lead spacing ensure direct PCB compatibility

All substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the main part.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Lead Spacing	Size Dia	Height Max	Ripple Current @ 120 Hz	Product Status
RFS-100V101MJ6#5	Elna America	100 µF	100 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.295" (7.50 mm)	0.630" (16.00 mm)	0.984" (25.00 mm)	485 mA	Obsolete
ROB-100V101MI5#	Elna America	100 µF	100 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00 mm)	0.492" (12.50 mm)	0.787" (20.00 mm)	340 mA	Obsolete
UFW2A101MPD	Nichicon	100 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.787" (20.00 mm)	350 mA	Not For New Designs
UKW2A101MPD	Nichicon	100 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.787" (20.00 mm)	350 mA	Not For New Designs
UPW2C101MHD	Nichicon	100 µF	160 V	±20%	8000 Hrs @ 105°C	-40°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	0.984" (25.00 mm)	330 mA	Obsolete
SEK101M200ST	Cornell Dubilier Electronics (CDE)	100 µF	200 V	±20%	2000 Hrs @ 105°C	-40°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	0.984" (25.00 mm)	335 mA	Active
EKXG251ELL101ML25S	Chemi-Con	100 µF	250 V	±20%	10000 Hrs @ 105°C	-40°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	0.984" (25.00 mm)	680 mA	Active

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications):

UFW2A101MPD and UKW2A101MPD provide 100 µF, 100 V electrical equivalence with improved lifetime (2000 Hrs @ 85°C versus 1000 Hrs @ 85°C). Both parts are classified as "Not For New Designs," indicating limited future availability. Physical dimensions differ from the main part, requiring PCB layout verification before implementation.

For Enhanced Reliability (Upgrade Path):

UPW2C101MHD offers 160 V rating with extended lifetime of 8000 Hrs @ 105°C and expanded operating temperature range to 105°C. Physical dimensions and lead spacing match the main part exactly, enabling direct PCB compatibility. Product status is obsolete.

SEK101M200ST (Cornell Dubilier Electronics) provides 200 V rating with 2000 Hrs @ 105°C lifetime and active product status. Identical physical dimensions and lead spacing ensure direct PCB substitution. ESR specification of 1.99 Ohm @ 120 Hz is provided.

EKXG251ELL101ML25S (Chemi-Con) delivers maximum performance upgrade with 250 V rating, 10000 Hrs @ 105°C lifetime, and active product status. Physical dimensions and lead spacing are identical to the main part. Ripple current capability is 680 mA @ 120 Hz and 1.53 A @ 100 kHz, exceeding the main part specification.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. SEK101M200ST and EKXG251ELL101ML25S carry active product status, ensuring long-term supply chain availability and compliance with current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can ROB-100V101MI5# be used as a direct replacement for RFS-100V101MJ6#5?

A: ROB-100V101MI5# matches the electrical specifications (100 µF, 100 V, ±20%, 1000 Hrs @ 85°C) but has different physical dimensions and lead spacing (0.197" lead spacing versus 0.295", smaller diameter and height). PCB layout compatibility must be verified before substitution.

Q: What is the difference between similar and upgrade substitutes?

A: Similar substitutes maintain identical voltage and lifetime ratings but may have different physical dimensions. Upgrade substitutes provide higher voltage ratings, extended lifetime, or improved temperature ranges while maintaining the same capacitance value. Upgrade parts typically offer better long-term reliability and supply chain availability.

Q: Is SEK101M200ST compatible with the original PCB layout?

A: Yes. SEK101M200ST has identical lead spacing (0.295"), diameter (0.630"), and height (0.984") as the RFS-100V101MJ6#5, enabling direct PCB compatibility without layout modifications.

Q: Why should I consider EKXG251ELL101ML25S over other substitutes?

A: EKXG251ELL101ML25S offers the highest performance specification with 250 V rating, 10000 Hrs @ 105°C lifetime, and active product status. It provides maximum voltage margin and reliability for long-term applications. Physical dimensions match the main part exactly.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the main part.

Q: What does "Not For New Designs" product status mean?

A: Parts marked "Not For New Designs" are in limited production or phase-out status. While currently available, they are not recommended for new circuit designs due to uncertain future availability. Active status parts are preferred for new designs.

Q: Can I use a 160 V or 200 V rated capacitor in a 100 V circuit?

A: Yes. Higher voltage-rated capacitors can be used in lower voltage applications. The circuit will operate within the capacitor's voltage rating margin, providing additional safety margin. Physical dimensions and lead spacing must remain compatible with the PCB layout.

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