Equivalent & Substitute Parts for RFS-100V330MI5#5

Part Overview

The RFS-100V330MI5#5 is a 33 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 rated for 1000 hours at 85°C and is designed for audio applications. The part maintains active product status with 972 units in current inventory.

Substitute parts are necessary when the original component becomes unavailable, when design requirements change, or when alternative manufacturers' components offer improved performance characteristics such as extended lifetime ratings or enhanced ripple current handling.

Key Parameters

Parameter	Value	Unit
Capacitance	33	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	220	mA
Lead Spacing	5.00	mm
Diameter	12.50	mm
Height - Seated (Max)	20.00	mm
Mounting Type	Through Hole	—
Package / Case	Radial, Can	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution logic for the RFS-100V330MI5#5 is based on the following critical parameters:

Primary Compatibility Criteria:

Capacitance value: 33 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage rating: 100 V minimum (equal or higher acceptable)
Polarization: Polar (exact match required)
Mounting type: Through Hole (exact match required)
Package type: Radial, Can (exact match required)
Lead spacing: 5.00 mm (exact match required)
Physical dimensions: 12.50 mm diameter, 20.00 mm height maximum (exact match required)

Secondary Performance Criteria:

Lifetime rating at temperature
Operating temperature range
Ripple current capability
Product status and availability

Substitute parts are grouped into two categories:

Upgrade Substitutes: Parts with identical electrical specifications but enhanced performance characteristics (higher voltage rating, extended lifetime, improved ripple current handling).

Similar Substitutes: Parts with identical electrical and mechanical specifications but different product status or lead spacing configurations.

Parameter Comparison

Parameter	RFS-100V330MI5#5 (Elna)	UPW2C330MHD (Nichicon)	UFW2A330MPD (Nichicon)	UKW2A330MPD (Nichicon)
Manufacturer	Elna America	Nichicon	Nichicon	Nichicon
Series	RFS SILMIC II	UPW	UFW	UKW
Capacitance	33 µF	33 µF	33 µF	33 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage - Rated	100 V	160 V	100 V	100 V
Lifetime @ Temperature	1000 Hrs @ 85°C	7000 Hrs @ 105°C	2000 Hrs @ 85°C	2000 Hrs @ 85°C
Operating Temperature	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 85°C
Polarization	Polar	Polar	Polar	Polar
Ripple Current @ 120 Hz	220 mA	180 mA	160 mA	160 mA
Lead Spacing	5.00 mm	5.00 mm	3.50 mm	3.50 mm
Diameter	12.50 mm	12.50 mm	8.00 mm	8.00 mm
Height - Seated (Max)	20.00 mm	20.00 mm	11.50 mm	11.50 mm
Mounting Type	Through Hole	Polar	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Product Status	Active	Obsolete	Not For New Designs	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	972 Pcs In Stock	2022 Pcs In Stock	2104 Pcs In Stock	1882 Pcs In Stock

Engineering Selection Recommendations

Direct Mechanical Substitutes (Same Footprint):

The UPW2C330MHD offers upgrade characteristics with identical lead spacing (5.00 mm) and physical dimensions (12.50 mm diameter, 20.00 mm height). This part provides a higher voltage rating (160 V versus 100 V) and significantly extended lifetime (7000 hours at 105°C versus 1000 hours at 85°C). The UPW2C330MHD is classified as Obsolete; however, 2022 units are currently in inventory. This part is suitable for applications requiring enhanced reliability margins or operation in elevated temperature environments.

Mechanical Incompatibility Note:

The UFW2A330MPD and UKW2A330MPD both feature reduced lead spacing (3.50 mm versus 5.00 mm) and smaller physical dimensions (8.00 mm diameter, 11.50 mm height). These parts are not direct mechanical substitutes for the RFS-100V330MI5#5 due to PCB footprint incompatibility. Both parts are classified as Not For New Designs and feature reduced ripple current ratings (160 mA at 120 Hz versus 220 mA).

Compliance Status:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original component's regulatory standing.

Frequently Asked Questions (FAQ)

Q: Can the UPW2C330MHD replace the RFS-100V330MI5#5 in existing designs?

A: The UPW2C330MHD is mechanically compatible with the RFS-100V330MI5#5 due to identical lead spacing (5.00 mm) and physical dimensions (12.50 mm diameter, 20.00 mm height). Both parts use radial, can package configuration with through-hole mounting. The higher voltage rating (160 V) and extended lifetime (7000 hours at 105°C) make this an upgrade substitute. However, the UPW2C330MHD is classified as Obsolete.

Q: Why are UFW2A330MPD and UKW2A330MPD not suitable substitutes?

A: These parts feature different lead spacing (3.50 mm versus 5.00 mm) and smaller physical dimensions (8.00 mm diameter, 11.50 mm height versus 12.50 mm diameter, 20.00 mm height). These dimensional differences make them mechanically incompatible with PCB layouts designed for the RFS-100V330MI5#5. Direct substitution would require PCB redesign.

Q: What are the key electrical parameters that must match for substitution?

A: Capacitance (33 µF), tolerance (±20%), voltage rating (100 V minimum), and polarization (Polar) are non-negotiable parameters. All substitute parts listed maintain these specifications. Lead spacing and physical dimensions must also match for direct PCB compatibility without layout modifications.

Q: Is the RFS-100V330MI5#5 still available for new designs?

A: Yes, the RFS-100V330MI5#5 maintains Active product status with 972 units currently in inventory. This part is suitable for new design implementations.

Q: What is the difference between "Active," "Not For New Designs," and "Obsolete" product status?

A: Active parts are recommended for new designs and are in current production. Not For New Designs indicates the part is still available but manufacturers recommend against using it in new projects. Obsolete parts are no longer manufactured, though existing inventory may remain available.

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