RFS-35V102MK8#5 Equivalent & Substitute Parts

Part Overview

The RFS-35V102MK8#5 is a 1000 µF, 35 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 carries an Obsolete product status, making it necessary to identify equivalent substitute components for ongoing production support and design continuity.

Key Parameters

Parameter	Value
Capacitance	1000 µF
Voltage Rating	35 V
Tolerance	±20%
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.295" (7.50mm)
Size / Dimension	0.709" Dia (18.00mm)
Height - Seated (Max)	1.398" (35.50mm)
Ripple Current @ 120 Hz	1.69 A
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RFS-35V102MK8#5 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 1000 µF (exact match required)
Voltage Rating: 35 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

Secondary Compatibility Parameters:

Operating Temperature Range: -40°C ~ 85°C (must encompass or match)
Lead Spacing: 0.295" (7.50mm) (exact match for PCB compatibility)
Physical Dimensions: 0.709" Dia (18.00mm) and 1.398" Height (35.50mm) (exact match for mechanical fit)
RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Acceptable Variations:

Lifetime @ Temperature: May exceed 1000 Hrs @ 85°C (2000 Hrs @ 85°C is acceptable)
Ripple Current: May vary within application requirements
Manufacturer: Different manufacturers acceptable if all parameters match

Non-Substitutable Parts:

UVK2A102MHD: Voltage rating is 100 V (exceeds requirement); physical dimensions differ; lead spacing matches but overall form factor incompatible
UFW1V102MHD: Lead spacing is 0.197" (5.00mm), not 0.295" (7.50mm); physical dimensions differ significantly
UKW1V102MHD: Lead spacing is 0.197" (5.00mm), not 0.295" (7.50mm); physical dimensions differ significantly

Direct Substitutes:

UFG1V102MHM: Matches all primary criteria; physical dimensions differ slightly (0.630" Dia, 1.063" Height) but lead spacing matches; acceptable for audio applications with mechanical clearance verification

Parameter Comparison

Parameter	RFS-35V102MK8#5 (Main)	UFG1V102MHM	UFW1V102MHD	UKW1V102MHD	UVK2A102MHD
Manufacturer	Elna America	Nichicon	Nichicon	Nichicon	Nichicon
Capacitance	1000 µF	1000 µF	1000 µF	1000 µF	1000 µF
Voltage Rating	35 V	35 V	35 V	35 V	100 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Lifetime @ 85°C	1000 Hrs	1000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Polarization	Polar	Polar	Polar	Polar	Polar
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Lead Spacing	0.295" (7.50mm)	0.295" (7.50mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.295" (7.50mm)
Size / Dimension	0.709" Dia (18.00mm)	0.630" Dia (16.00mm)	0.492" Dia (12.50mm)	0.492" Dia (12.50mm)	0.709" Dia (18.00mm)
Height - Seated (Max)	1.398" (35.50mm)	1.063" (27.00mm)	0.787" (20.00mm)	0.787" (20.00mm)	1.398" (35.50mm)
Ripple Current @ 120 Hz	1.69 A	1.06 A	1.1 A	1.1 A	1.35 A
Product Status	Obsolete	Obsolete	Not For New Designs	Not For New Designs	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitution:

UFG1V102MHM is the only part that meets all primary electrical substitution criteria (1000 µF, 35 V, ±20% tolerance, polar, through-hole, radial can package). While physical dimensions differ slightly (0.630" diameter and 1.063" height versus 0.709" diameter and 1.398" height), the matching lead spacing of 0.295" (7.50mm) ensures PCB footprint compatibility. Mechanical clearance verification is required for the reduced height and diameter. The part is rated for 1000 hours at 85°C, matching the original specification. UFG1V102MHM carries Obsolete product status, consistent with the main part.

Not Recommended for Direct Substitution:

UFW1V102MHD and UKW1V102MHD feature lead spacing of 0.197" (5.00mm), which is incompatible with the 0.295" (7.50mm) PCB footprint of the RFS-35V102MK8#5. These parts cannot be used as direct substitutes without PCB redesign.

UVK2A102MHD has a voltage rating of 100 V, which exceeds the 35 V requirement. While over-voltage rated capacitors can function in lower voltage applications, this part is not a true equivalent and introduces unnecessary cost and size considerations. The physical dimensions also differ from the original specification.

Compliance Considerations:

All identified substitute parts maintain ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements for continued use in production environments.

Frequently Asked Questions (FAQ)

Q: Can UFW1V102MHD or UKW1V102MHD be used as substitutes for RFS-35V102MK8#5?

A: No. These parts have lead spacing of 0.197" (5.00mm), while the RFS-35V102MK8#5 requires 0.295" (7.50mm) lead spacing. Direct substitution would require PCB redesign and is not recommended.

Q: Is UFG1V102MHM a direct mechanical fit for RFS-35V102MK8#5?

A: UFG1V102MHM has matching lead spacing (0.295" / 7.50mm) and will fit the PCB footprint. However, the physical dimensions differ: UFG1V102MHM is 0.630" diameter and 1.063" height, compared to 0.709" diameter and 1.398" height for the original part. Mechanical clearance verification is required to confirm compatibility with the enclosure and surrounding components.

Q: Why is UVK2A102MHD not suitable as a substitute?

A: UVK2A102MHD has a voltage rating of 100 V instead of 35 V. While it will function electrically in a 35 V circuit, it is not an equivalent part. The higher voltage rating results in different physical dimensions and is not a true substitute for the original specification.

Q: What is the impact of different ripple current ratings?

A: The RFS-35V102MK8#5 is rated for 1.69 A ripple current at 120 Hz. UFG1V102MHM is rated for 1.06 A at 120 Hz. If the application requires the full 1.69 A ripple current capacity, UFG1V102MHM may not be suitable. Application-specific ripple current analysis is required to determine compatibility.

Q: Are there any regulatory or compliance differences between the main part and UFG1V102MHM?

A: No. Both parts are ROHS3 compliant and REACH Unaffected, meeting current regulatory requirements for electronic component use.

Q: What does "Not For New Designs" product status mean for UFW1V102MHD, UKW1V102MHD, and UVK2A102MHD?

A: "Not For New Designs" indicates that these parts are in the later stages of their product lifecycle and should not be selected for new circuit designs. However, they remain available for existing production support. The RFS-35V102MK8#5 carries "Obsolete" status, indicating it is no longer manufactured. For new designs, alternative current-generation capacitors with matching electrical specifications should be evaluated.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message