RFS-63V101MI6#5 Equivalent & Substitute Parts

Part Overview

The RFS-63V101MI6#5 is a 100 µF, 63 V aluminum electrolytic capacitor manufactured by Elna America in the SILMIC II series. This radial, through-hole component is designed for audio applications with a rated lifetime of 1000 hours at 85°C. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. Substitute parts maintain the core electrical specifications (100 µF capacitance, ±20% tolerance, radial configuration, 5.00 mm lead spacing) while offering improved performance characteristics such as higher voltage ratings, extended lifetime ratings, or enhanced ripple current handling.

Key Parameters

Parameter	Value	Unit
Capacitance	100	µF
Voltage - Rated	63	V
Tolerance	±20	%
Polarization	Polar	—
Package / Case	Radial, Can	—
Mounting Type	Through Hole	—
Lead Spacing	5.00	mm
Size / Dimension	12.50 Dia	mm
Height - Seated (Max)	27.00	mm
Operating Temperature	-40 to 85	°C
Lifetime @ Temp.	1000 Hrs @ 85°C	—
Ripple Current @ 120 Hz	415	mA
Ripple Current @ 100 kHz	539.5	mA
RoHS Status	ROHS3 Compliant	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitute parts for the RFS-63V101MI6#5 are selected based on strict electrical and mechanical compatibility criteria. All substitute parts maintain the following core parameters:

Mandatory Matching Parameters:

Capacitance: 100 µF
Tolerance: ±20%
Polarization: Polar
Package / Case: Radial, Can
Mounting Type: Through Hole
Lead Spacing: 5.00 mm (0.197")
Size / Dimension: 12.50 mm diameter
RoHS Status: ROHS3 Compliant

Allowable Variations in Substitute Parts:

Voltage Rating: Substitutes rated at 100 V or higher (160 V preferred for design margin)
Operating Temperature Range: Substitutes rated to 85°C minimum; higher ratings (105°C, 150°C) are acceptable
Lifetime @ Temperature: Substitutes with equal or extended lifetime ratings
Ripple Current: Substitutes with equal or higher ripple current capacity
Height: Substitutes with seated height up to 27.00 mm (minor variations acceptable within mechanical envelope)

Substitutes are grouped into two categories: Direct Voltage Upgrades (160 V rated) and Extended Temperature/Lifetime Variants (105°C operation, 2000+ hour ratings). All substitute parts are active or available for new designs, addressing the obsolescence of the original RFS-63V101MI6#5.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance (%)	Lifetime @ Temp.	Operating Temp. (°C)	Lead Spacing (mm)	Height Max (mm)	Ripple @ 120 Hz (mA)	Product Status
RFS-63V101MI6#5	Elna America	100	63	±20	1000 Hrs @ 85°C	-40 to 85	5.00	27.00	415	Obsolete
160PK100MEFC12.5X25	Rubycon	100	160	±20	2000 Hrs @ 85°C	-40 to 85	5.00	27.00	430	Active
160PX100MEFC12.5X25	Rubycon	100	160	±20	2000 Hrs @ 105°C	-40 to 105	5.00	27.00	320	Active
B43851F1107M000	EPCOS - TDK Electronics	100	160	±20	3000 Hrs @ 105°C	-40 to 105	5.00	27.00	300	Active
EKMQ161ELL101MK25S	Chemi-Con	100	160	±20	2000 Hrs @ 105°C	-40 to 105	5.00	26.50	310	Active
ESMG161ELL101MK25S	Chemi-Con	100	160	±20	2000 Hrs @ 85°C	-40 to 85	5.00	26.50	430	Active
ESMQ161ELL101MK25S	Chemi-Con	100	160	±20	2000 Hrs @ 85°C	-40 to 85	5.00	26.50	430	Active
UBX2A101MHL	Nichicon	100	100	±20	1000 Hrs @ 150°C	-55 to 150	5.00	26.50	475	Active
UCS2C101MHD	Nichicon	100	160	±20	10000 Hrs @ 105°C	-40 to 105	5.00	26.50	710	Active
UVR2C101MHD	Nichicon	100	160	±20	2000 Hrs @ 85°C	-40 to 85	5.00	27.00	430	Not For New Designs
UVZ2C101MHD	Nichicon	100	160	±20	2000 Hrs @ 105°C	-40 to 105	5.00	27.00	215	Not For New Designs

Engineering Selection Recommendations

For Direct Replacement (Same Operating Temperature Range):

The ESMG161ELL101MK25S and ESMQ161ELL101MK25S (Chemi-Con SMG and SMQ series) provide direct functional replacement with identical operating temperature range (-40°C to 85°C) and equivalent ripple current performance (430 mA @ 120 Hz). These parts offer doubled lifetime rating (2000 Hrs @ 85°C versus 1000 Hrs) and increased voltage margin (160 V versus 63 V). Both are active products with ROHS3 compliance and REACH unaffected status.

For Extended Temperature Operation:

The 160PX100MEFC12.5X25 (Rubycon PX series) and EKMQ161ELL101MK25S (Chemi-Con KMQ series) extend operating temperature to 105°C with 2000-hour lifetime ratings at that temperature. The UCS2C101MHD (Nichicon UCS series) provides the highest reliability specification with 10000-hour lifetime at 105°C, suitable for long-service-life applications.

For Automotive/High-Temperature Applications:

The UBX2A101MHL (Nichicon UBX series) operates across -55°C to 150°C with 1000-hour lifetime at 150°C, addressing automotive and extreme-environment requirements. This part maintains 100 V voltage rating with enhanced ripple current capacity (475 mA @ 120 Hz).

Compliance and Status Considerations:

All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status. Parts marked "Active" are suitable for new designs. The UVR2C101MHD and UVZ2C101MHD (Nichicon UVR and UVZ series) are classified "Not For New Designs" and should be used only for legacy system maintenance or repair.

Frequently Asked Questions (FAQ)

Q: Can I use a 160 V rated capacitor in place of the 63 V RFS-63V101MI6#5?

A: Yes. Higher voltage-rated capacitors are electrically compatible substitutes. A 160 V capacitor operates safely in a 63 V circuit and provides additional design margin. All substitute parts listed are rated 100 V or higher, making them suitable for direct replacement in the original 63 V application.

Q: What is the difference between the Rubycon 160PK100MEFC12.5X25 and 160PX100MEFC12.5X25?

A: Both are 100 µF, 160 V Rubycon radial capacitors with identical physical dimensions and lead spacing. The primary difference is operating temperature range: the PK series operates -40°C to 85°C with 2000-hour lifetime at 85°C, while the PX series extends to 105°C with 2000-hour lifetime at 105°C. The PX series is preferred for applications requiring higher temperature stability.

Q: Why do some substitute parts have lower ripple current ratings than the original?

A: Ripple current capacity varies by manufacturer design and series. The B43851F1107M000 (EPCOS) and UVZ2C101MHD (Nichicon) have lower ripple current ratings (300 mA and 215 mA @ 120 Hz respectively) compared to the original 415 mA. These parts are suitable only for applications with ripple current demands below their rated values. For high-ripple-current audio applications, select UCS2C101MHD (710 mA) or UBX2A101MHL (475 mA).

Q: Are all substitute parts pin-compatible with the original RFS-63V101MI6#5?

A: Yes. All substitute parts maintain 5.00 mm lead spacing and radial, through-hole mounting configuration. Physical dimensions (12.50 mm diameter, maximum 27.00 mm height) are compatible with the original PCB layout. Minor height variations (26.50 mm versus 27.00 mm) do not affect mechanical fit.

Q: Which substitute part offers the longest service life?

A: The UCS2C101MHD (Nichicon UCS series) provides 10000-hour lifetime at 105°C, the highest reliability rating among all substitutes. This part is suitable for applications requiring extended operational life and is actively produced for new designs.

Q: Can I use the UBX2A101MHL in audio applications like the original part?

A: The UBX2A101MHL is rated for automotive applications and operates across -55°C to 150°C. While electrically compatible (100 µF, ±20%, radial configuration), it is specified for automotive use rather than audio. It is suitable for audio circuits but is optimized for automotive thermal and reliability requirements. For audio-specific applications, Chemi-Con SMG/SMQ or Rubycon PK/PX series are more directly aligned with the original application category.

Q: What does "Not For New Designs" mean for UVR2C101MHD and UVZ2C101MHD?

A: Parts marked "Not For New Designs" are legacy products still available for maintenance and repair of existing systems but are not recommended for incorporation into new product designs. These parts remain in inventory and are electrically compatible, but manufacturers recommend selecting active-status alternatives (such as UCS2C101MHD) for new development.

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

A: Selection depends on three factors: (1) Operating temperature range required—select 85°C-rated parts for standard environments or 105°C+ for elevated-temperature applications; (2) Ripple current demand—verify the substitute's ripple current rating exceeds your circuit requirement; (3) Lifetime requirement—choose 2000+ hour ratings for reliability-critical applications. Cross-reference these requirements against the Parameter Comparison table to identify the optimal substitute.

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