RFS-6V101MG3# Equivalent & Substitute Parts Reference

Part Overview

The RFS-6V101MG3# is a 100 µF, 6.3 V aluminum electrolytic capacitor in radial, can package manufactured by Elna America. This component is classified as Obsolete, indicating it is no longer in active production. The part belongs to the RFS/SILMIC II series 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 are necessary for ongoing maintenance, repair, and redesign of legacy equipment. Substitute parts must maintain compatibility across capacitance, tolerance, physical dimensions, and mounting characteristics while accommodating variations in voltage rating and thermal performance based on application requirements.

Key Parameters

Parameter	Value	Unit
Capacitance	100	µF
Voltage - Rated	6.3	V
Tolerance	±20%	—
Lead Spacing	0.138" (3.50)	mm
Size / Dimension	0.315" Dia (8.00)	mm
Height - Seated (Max)	0.453" (11.50)	mm
Mounting Type	Through Hole	—
Package / Case	Radial, Can	—
Operating Temperature	-40°C ~ 85°C	—
Lifetime @ Temp.	1000 Hrs @ 85°C	—
Polarization	Polar	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the RFS-6V101MG3# is determined by strict adherence to the following parameters:

Mandatory Compatibility Parameters:

Capacitance: 100 µF (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.138" (3.50 mm) (exact match required)
Size / Dimension: 0.315" Dia (8.00 mm) (exact match required)
Height - Seated (Max): 0.453" (11.50 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Polarization: Polar (exact match required)

Allowable Variation Parameters:

Voltage - Rated: May be equal to or greater than 6.3 V
Operating Temperature: May extend beyond -40°C ~ 85°C
Lifetime @ Temp.: May be equal to or greater than 1000 Hrs @ 85°C
Manufacturer: May differ
Series designation: May differ
RoHS Status: Must maintain ROHS3 Compliant or equivalent

Substitute parts are grouped into two categories: Upgrade substitutes (higher voltage rating) and Similar substitutes (alternative manufacturers with equivalent or enhanced specifications).

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ Temp.	Operating Temp. (°C)	Ripple Current @ 120 Hz (mA)	Product Status
RFS-6V101MG3#	Elna America	100	6.3	±20%	1000 Hrs @ 85°C	-40 ~ 85	135	Obsolete
ROB-25V101MG3#	Elna America	100	25	±20%	1000 Hrs @ 85°C	-40 ~ 85	165	Obsolete
UFW1H101MPD	Nichicon	100	50	±20%	2000 Hrs @ 85°C	-40 ~ 85	250	Not For New Designs
UKT1H101MPD	Nichicon	100	50	±20%	1000 Hrs @ 105°C	-55 ~ 105	190	Not For New Designs
UKW1H101MPD	Nichicon	100	50	±20%	2000 Hrs @ 85°C	-40 ~ 85	250	Not For New Designs
515D107M035BB6AE3	Vishay Sprague	100	35	±20%	2000 Hrs @ 85°C	-40 ~ 85	230	Obsolete
EEU-EB1H101S	Panasonic Electronic Components	100	50	±20%	5000 Hrs @ 105°C	-40 ~ 105	99	Active
EEU-FC1V101	Panasonic Electronic Components	100	35	±20%	2000 Hrs @ 105°C	-55 ~ 105	360.8	Active
UHE1H101MPD	Nichicon	100	50	±20%	7000 Hrs @ 105°C	-40 ~ 105	388.5	Not For New Designs
UKL1E101KPDANA	Nichicon	100	25	±10%	1000 Hrs @ 105°C	-40 ~ 105	280	Not For New Designs
UPS1H101MPD	Nichicon	100	50	±20%	2000 Hrs @ 105°C	-55 ~ 105	170	Not For New Designs

Engineering Selection Recommendations

Upgrade Substitutes (Higher Voltage Rating):

The upgrade substitutes ROB-25V101MG3#, UFW1H101MPD, UKT1H101MPD, and UKW1H101MPD provide voltage ratings of 25 V or 50 V, which exceed the original 6.3 V specification. These parts maintain identical physical dimensions, lead spacing, and mounting characteristics. Upgrade substitutes are electrically compatible in applications where the original 6.3 V rating is sufficient, as higher-rated components operate safely at lower voltages. Selection among upgrade options depends on thermal performance requirements and product availability status.

Similar Substitutes (Alternative Manufacturers):

The similar substitutes 515D107M035BB6AE3, EEU-EB1H101S, EEU-FC1V101, UHE1H101MPD, UKL1E101KPDANA, and UPS1H101MPD are offered by alternative manufacturers (Vishay Sprague, Panasonic Electronic Components, Nichicon) and provide equivalent or enhanced specifications. These parts maintain all mandatory compatibility parameters while offering variations in voltage rating, thermal lifetime, and operating temperature range.

Active Product Status Priority:

EEU-EB1H101S (Panasonic) and EEU-FC1V101 (Panasonic) are classified as Active products, indicating current production and long-term availability. These parts are preferred for new designs and long-term supply chain stability. EEU-EB1H101S provides 50 V rating with 5000 hours lifetime at 105°C. EEU-FC1V101 provides 35 V rating with AEC-Q200 automotive qualification and 2000 hours lifetime at 105°C.

RoHS and Compliance Considerations:

All listed substitute parts maintain ROHS3 Compliant status or equivalent environmental compliance. REACH status varies; UHE1H101MPD is REACH Affected, while all other substitutes are REACH Unaffected. Selection should account for end-product compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated capacitor in place of the 6.3 V RFS-6V101MG3#?

A: Yes. A 50 V rated capacitor is electrically compatible in applications designed for 6.3 V operation. The higher voltage rating provides additional safety margin and does not affect circuit function. All 50 V substitute options (UFW1H101MPD, UKT1H101MPD, UKW1H101MPD, EEU-EB1H101S, UHE1H101MPD, UPS1H101MPD) maintain identical physical dimensions and lead spacing, ensuring direct mechanical compatibility.

Q: What is the difference between Upgrade and Similar substitutes?

A: Upgrade substitutes (ROB-25V101MG3#, UFW1H101MPD, UKT1H101MPD, UKW1H101MPD) are higher voltage variants of the same or similar product lines, typically from the same or closely related manufacturers. Similar substitutes (515D107M035BB6AE3, EEU-EB1H101S, EEU-FC1V101, UHE1H101MPD, UKL1E101KPDANA, UPS1H101MPD) are from alternative manufacturers and may offer different thermal or performance characteristics while maintaining core compatibility parameters.

Q: Why is product status (Obsolete, Not For New Designs, Active) important?

A: Product status indicates manufacturing availability and long-term supply viability. Obsolete parts (RFS-6V101MG3#, ROB-25V101MG3#, 515D107M035BB6AE3) are no longer manufactured and available only from existing inventory. Not For New Designs parts are in limited production with uncertain future availability. Active parts (EEU-EB1H101S, EEU-FC1V101) are currently manufactured and recommended for new designs requiring long-term component supply.

Q: Are all substitute parts physically identical to the original RFS-6V101MG3#?

A: All listed substitute parts share identical lead spacing (0.138" / 3.50 mm), diameter (0.315" / 8.00 mm), and maximum seated height (0.453" / 11.50 mm). One exception is EEU-EB1H101S, which has a maximum seated height of 0.492" (12.50 mm). This 0.039" (1.00 mm) difference may affect PCB layout in space-constrained applications. Verify clearance before substitution.

Q: What does ±20% tolerance mean, and does UKL1E101KPDANA's ±10% tolerance matter?

A: Tolerance specifies the allowable deviation from the nominal 100 µF capacitance value. ±20% tolerance allows values between 80 µF and 120 µF. ±10% tolerance (UKL1E101KPDANA) allows values between 90 µF and 110 µF, providing tighter capacitance control. Tighter tolerance is beneficial in precision circuits but not required for general audio applications. Selection depends on circuit sensitivity to capacitance variation.

Q: Which substitute offers the best thermal performance?

A: UHE1H101MPD provides the highest thermal lifetime rating at 7000 hours at 105°C. EEU-EB1H101S offers 5000 hours at 105°C. Both exceed the original 1000 hours at 85°C specification. For applications requiring extended thermal stability, these Nichicon and Panasonic options provide superior performance. Operating temperature range also extends to 105°C in these high-performance variants.

Q: Can I substitute UKL1E101KPDANA if my circuit requires ±20% tolerance?

A: UKL1E101KPDANA has ±10% tolerance, which is tighter than the original ±20% specification. This part is compatible from a tolerance perspective, as ±10% is a subset of ±20% tolerance requirements. However, verify that your circuit design does not specifically require the full ±20% tolerance range before substitution.

Q: What is the significance of ripple current ratings in the comparison table?

A: Ripple current rating indicates the maximum AC current the capacitor can handle at specified frequency without exceeding temperature limits. Higher ripple current capability (EEU-FC1V101 at 360.8 mA @ 120 Hz, UHE1H101MPD at 388.5 mA @ 120 Hz) provides greater margin in high-current applications. The original RFS-6V101MG3# is rated at 135 mA @ 120 Hz. Substitutes with higher ripple current ratings offer enhanced performance headroom.

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