Equivalent & Substitute Parts for SN101M6R3ST

Part Overview

The SN101M6R3ST is a 100 µF, 6.3 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, can package configuration. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing applications. The original part features a 1000-hour lifetime rating at 85°C and 3.18 Ohm ESR at 120 Hz, with bi-polar polarization suitable for general-purpose applications.

Due to obsolete product status, substitute parts with compatible electrical and mechanical parameters are required to maintain circuit functionality and design continuity.

Key Parameters

Parameter	Value	Unit	Significance for Substitution
Capacitance	100	µF	Must match exactly
Voltage - Rated	6.3	V	Substitute must equal or exceed
Tolerance	±20%	-	Must match
Lead Spacing	0.138" (3.50 mm)	-	Must match for PCB compatibility
Size / Dimension	0.315" Dia (8.00 mm)	-	Must match for mechanical fit
Height - Seated (Max)	0.453" (11.50 mm)	-	Must match for clearance
Mounting Type	Through Hole	-	Must match
Package / Case	Radial, Can	-	Must match
Operating Temperature	-40°C ~ 85°C	-	Substitute must support range
Polarization	Bi-Polar	-	Must match
RoHS Status	ROHS3 Compliant	-	Regulatory requirement

Substitute Part Grouping Explanation

Substitution of the SN101M6R3ST is determined by strict adherence to the following electrical and mechanical parameters:

Mandatory Matching 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: Bi-Polar (exact match required)

Allowable Variation Parameters:

Voltage - Rated: Substitute must equal or exceed 6.3 V
Operating Temperature: Substitute must support -40°C ~ 85°C range
Lifetime @ Temp.: Substitute may exceed 1000 Hrs @ 85°C
Ripple Current: Substitute may exceed specified values
ESR: Substitute may differ if not specified as critical parameter

All identified substitute parts meet these criteria and maintain full mechanical and electrical compatibility with the original SN101M6R3ST design.

Parameter Comparison

Parameter	SN101M6R3ST (CDE)	UVP1C101MPD (Nichicon)	ECE-A1CN101U (Panasonic)	ECE-A1EN101U (Panasonic)	UVP1E101MPD (Nichicon)
Capacitance	100 µF	100 µF	100 µF	100 µF	100 µF
Tolerance	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	6.3 V	16 V	16 V	25 V	25 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Lifetime @ Temp.	1000 Hrs @ 85°C	2000 Hrs @ 85°C	2000 Hrs @ 85°C	2000 Hrs @ 85°C	2000 Hrs @ 85°C
Lead Spacing	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)
Size / Dimension	0.315" Dia (8.00 mm)	0.315" Dia (8.00 mm)	0.315" Dia (8.00 mm)	0.315" Dia (8.00 mm)	0.315" Dia (8.00 mm)
Height - Seated (Max)	0.453" (11.50 mm)	0.453" (11.50 mm)	0.453" (11.50 mm)	0.453" (11.50 mm)	0.453" (11.50 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Polarization	Bi-Polar	Bi-Polar	Bi-Polar	Bi-Polar	Bi-Polar
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Not For New Designs	Active	Active	Not For New Designs

Engineering Selection Recommendations

Primary Recommendation: ECE-A1CN101U (Panasonic)

The ECE-A1CN101U is the preferred substitute for the SN101M6R3ST. This part maintains all mandatory mechanical and electrical parameters while offering active product status. The 16 V rated voltage exceeds the original 6.3 V specification, providing additional voltage margin. The 2000-hour lifetime at 85°C doubles the original specification. ROHS3 compliance and REACH unaffected status ensure regulatory alignment for current manufacturing standards.

Secondary Recommendation: ECE-A1EN101U (Panasonic)

The ECE-A1EN101U provides an alternative with 25 V rated voltage and identical mechanical compatibility. Active product status and REACH unaffected designation support long-term supply chain stability. The higher voltage rating provides maximum design margin for applications with potential voltage transients.

Alternative Options: UVP1C101MPD and UVP1E101MPD (Nichicon)

Both Nichicon UVP series parts meet all mechanical and electrical compatibility requirements. However, both carry "Not For New Designs" product status, limiting their suitability for new applications. These parts are suitable only for legacy system maintenance or repair where original Nichicon sourcing is required.

All substitute parts are ROHS3 compliant and support the full -40°C to 85°C operating temperature range of the original component.

Frequently Asked Questions (FAQ)

Q: Can the SN101M6R3ST be directly replaced with any of the listed substitutes?

A: Yes. All listed substitute parts maintain identical mechanical dimensions (0.315" diameter, 0.453" maximum height, 0.138" lead spacing), identical capacitance (100 µF), identical tolerance (±20%), and identical through-hole radial can package configuration. Direct PCB substitution is mechanically and electrically compatible.

Q: Why do the substitute parts have higher voltage ratings (16 V or 25 V) than the original 6.3 V?

A: Higher voltage ratings are allowable substitutes because they exceed the original specification. A 16 V or 25 V rated capacitor functions correctly in a 6.3 V circuit. The higher voltage rating provides additional design margin and does not compromise circuit performance. The capacitance value (100 µF) and tolerance (±20%) remain identical.

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

A: "Active" status indicates the manufacturer continues production and supports long-term availability. "Not For New Designs" indicates the manufacturer no longer recommends the part for new circuit designs but may continue limited production for legacy support. For new applications, select parts with "Active" status (ECE-A1CN101U or ECE-A1EN101U).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting current regulatory requirements for hazardous substance restrictions.

Q: Does the higher lifetime rating (2000 Hrs @ 85°C) of substitute parts affect circuit design?

A: No. The higher lifetime rating of substitute parts (2000 hours versus 1000 hours at 85°C) represents an improvement over the original specification. This extended lifetime does not require design changes and provides enhanced reliability margin.

Q: Can ECE-A1CN101U and ECE-A1EN101U be used interchangeably?

A: Yes, both Panasonic parts are mechanically and electrically interchangeable in the SN101M6R3ST application. The primary difference is voltage rating (16 V versus 25 V). Select based on available inventory and voltage margin requirements for your specific application.

Q: What is the REACH status difference between Panasonic and Nichicon parts?

A: Panasonic ECE-A1 series parts are marked "REACH Unaffected," indicating full compliance with REACH regulations. Nichicon UVP series parts are marked "REACH Affected," indicating they contain substances of concern under REACH but remain compliant. For applications with strict REACH requirements, Panasonic parts are preferred.

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