RFS-35V101MH5#5 Equivalent & Substitute Parts

Part Overview

The RFS-35V101MH5#5 is a 100 µF, 35 V aluminum electrolytic capacitor in radial configuration 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, indicating it is no longer in active production. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for repair, maintenance, and new production runs.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	35 V
Tolerance	±20%
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Lead Spacing	0.197" (5.00mm)
Case Diameter	0.394" (10.00mm)
Height (Seated Max)	0.787" (20.00mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Ripple Current @ 120 Hz	295 mA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RFS-35V101MH5#5 is determined by strict adherence to the following electrical and mechanical parameters:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 100 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 35 V minimum (equal or higher voltage rating is acceptable)
Polarization: Polar (radial aluminum electrolytic)

Core Mechanical Parameters (Non-Negotiable):

Lead Spacing: 0.197" (5.00mm) (exact match required for PCB compatibility)
Case Diameter: 0.394" (10.00mm) (exact match required for board space)
Height: 0.787" (20.00mm) maximum (exact match required for clearance)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

Compliance Parameters:

RoHS3 Compliant (required for regulatory compliance)
Operating Temperature: -40°C ~ 85°C (minimum requirement)

Substitute parts are categorized into two groups:

Upgrade Substitutes: Parts with identical electrical and mechanical specifications but higher voltage ratings (63 V or 100 V) or improved lifetime ratings (2000 Hrs @ 85°C). These provide enhanced performance margins while maintaining full PCB compatibility.

Similar Substitutes: Parts with identical electrical specifications (100 µF, 35 V, ±20%) but different mechanical dimensions or lead spacing. These require PCB layout verification before implementation.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 85°C	Lead Spacing	Case Diameter	Height (Max)	Ripple Current @ 120 Hz	Product Status
RFS-35V101MH5#5	Elna America	100 µF	35 V	±20%	1000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.787" (20.00mm)	295 mA	Obsolete
UFW1J101MPD	Nichicon	100 µF	63 V	±20%	2000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.492" (12.50mm)	300 mA	Not For New Designs
UFW2A101MPD	Nichicon	100 µF	100 V	±20%	2000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.787" (20.00mm)	350 mA	Not For New Designs
UKW1J101MPD	Nichicon	100 µF	63 V	±20%	2000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.492" (12.50mm)	300 mA	Not For New Designs
UKW2A101MPD	Nichicon	100 µF	100 V	±20%	2000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.787" (20.00mm)	350 mA	Not For New Designs
UFG1V101MPM	Nichicon	100 µF	35 V	±20%	1000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	176 mA	Obsolete
UFW1V101MED	Nichicon	100 µF	35 V	±20%	2000 Hrs	0.098" (2.50mm)	0.248" (6.30mm)	0.433" (11.00mm)	200 mA	Obsolete
UKW1V101MED	Nichicon	100 µF	35 V	±20%	2000 Hrs	0.098" (2.50mm)	0.248" (6.30mm)	0.433" (11.00mm)	200 mA	Obsolete

Engineering Selection Recommendations

Direct Upgrade Substitutes (Recommended for New Designs):

UFW2A101MPD and UKW2A101MPD are the preferred substitutes. Both parts maintain identical mechanical dimensions (0.197" lead spacing, 0.394" diameter, 0.787" height) and electrical specifications (100 µF, ±20% tolerance) while providing 100 V voltage rating and 2000 hour lifetime at 85°C. These parts are fully compatible with existing PCB layouts designed for RFS-35V101MH5#5 and offer superior reliability margins. Both are ROHS3 compliant.

Voltage-Upgraded Substitutes (Acceptable for Existing Designs):

UFW1J101MPD and UKW1J101MPD provide 63 V voltage rating with 2000 hour lifetime. These parts maintain the required 0.197" lead spacing and 0.394" case diameter but have reduced height (0.492" vs. 0.787"). Substitution is acceptable if vertical clearance permits the shorter profile. Both are ROHS3 compliant.

Same-Voltage Substitutes (Layout Verification Required):

UFG1V101MPM, UFW1V101MED, and UKW1V101MED maintain the 35 V voltage rating and 100 µF capacitance. However, these parts feature different mechanical dimensions: UFG1V101MPM has 0.551" height; UFW1V101MED and UKW1V101MED have 0.098" lead spacing, 0.248" diameter, and 0.433" height. These substitutes require PCB layout verification to confirm compatibility with existing footprints and clearance requirements.

Compliance Verification:

All listed substitutes are ROHS3 compliant and operate within the -40°C ~ 85°C temperature range. No additional compliance actions are required.

Frequently Asked Questions (FAQ)

Q: Can UFW2A101MPD be used as a direct replacement for RFS-35V101MH5#5?

A: Yes. UFW2A101MPD maintains identical lead spacing (0.197"), case diameter (0.394"), and height (0.787"), ensuring full PCB compatibility. The 100 V voltage rating provides additional safety margin over the original 35 V specification. Both parts are ROHS3 compliant.

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

A: Upgrade substitutes (UFW2A101MPD, UKW2A101MPD, UFW1J101MPD, UKW1J101MPD) maintain the exact mechanical footprint of the original part, allowing direct PCB substitution. Similar substitutes (UFG1V101MPM, UFW1V101MED, UKW1V101MED) have different mechanical dimensions and require PCB layout verification before implementation.

Q: Why do UFW1V101MED and UKW1V101MED have different lead spacing?

A: These parts feature 0.098" (2.50mm) lead spacing compared to the original 0.197" (5.00mm). This difference reflects different design generations and manufacturing standards. Substitution requires confirmation that the PCB footprint accommodates the narrower lead spacing.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What is the significance of the 2000 hour lifetime rating in upgrade substitutes?

A: The upgrade substitutes (UFW2A101MPD, UKW2A101MPD, UFW1J101MPD, UKW1J101MPD) provide 2000 hour lifetime at 85°C, compared to 1000 hours for the original RFS-35V101MH5#5. This extended lifetime indicates improved capacitor design and materials, providing longer operational reliability in thermal stress conditions.

Q: Can UFW1J101MPD be used if vertical clearance is limited?

A: UFW1J101MPD has 0.492" height compared to the original 0.787". If the PCB design has vertical clearance constraints, this part accommodates tighter spacing while maintaining the required 0.197" lead spacing and 0.394" diameter. Verify clearance requirements before substitution.

Q: What should be verified before substituting with UFG1V101MPM?

A: UFG1V101MPM maintains the 35 V rating and 100 µF capacitance but has 0.551" height (shorter than the original 0.787"). Verify that the PCB layout accommodates this height difference and that the component does not interfere with adjacent circuitry or enclosure constraints.

Q: Are there any electrical performance differences between the substitute parts?

A: Ripple current ratings vary among substitutes. The original part handles 295 mA @ 120 Hz. UFW2A101MPD and UKW2A101MPD handle 350 mA @ 120 Hz, providing higher ripple current capacity. UFW1V101MED and UKW1V101MED handle 200 mA @ 120 Hz, which is lower. Verify ripple current requirements in the application circuit before substitution.

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