SS101M6R3ST Equivalent & Substitute Parts Reference

Part Overview

The SS101M6R3ST is a 100 µF, 6.3 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete and is used in general-purpose applications requiring through-hole mounting. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production support. Substitute parts maintain the core electrical specifications (100 µF capacitance, 6.3 V rated voltage, ±20% tolerance) while offering improved performance characteristics or extended availability from active product lines.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	100	µF	Critical - must match exactly
Voltage - Rated	6.3	V	Critical - minimum acceptable rating
Tolerance	±20%	%	Critical - must match or be tighter
Polarization	Polar	-	Critical - polarity requirement
Mounting Type	Through Hole	-	Critical - PCB compatibility
Package / Case	Radial, Can	-	Critical - form factor
Lead Spacing	0.098" (2.50mm)	inches (mm)	Important - PCB hole pattern
Size / Dimension	0.248" Dia (6.30mm)	inches (mm)	Important - board space clearance
Height - Seated (Max)	0.276" (7.00mm)	inches (mm)	Important - vertical clearance
ESR @ 120Hz	3.18	Ohm	Performance - ripple current handling
Lifetime @ Temp.	1000	Hrs @ 85°C	Performance - reliability
Operating Temperature	-40°C ~ 85°C	°C	Performance - thermal range
RoHS Status	ROHS3 Compliant	-	Compliance - regulatory requirement

Substitute Part Grouping Explanation

Substitute parts are grouped into three categories based on their relationship to the main part SS101M6R3ST:

Direct Equivalents (Same Electrical Specifications) Direct equivalents maintain identical capacitance (100 µF), voltage rating (6.3 V), tolerance (±20%), and physical form factor (radial, can, through-hole). These parts are interchangeable at the circuit level with no design modifications required. Selection among direct equivalents is based on product status (active vs. obsolete), availability, and performance enhancements such as lower ESR or extended lifetime ratings.

Similar Parts (Minor Parameter Variations) Similar parts maintain the core electrical specifications but may differ in secondary parameters such as lead spacing, physical dimensions, or ESR characteristics. The SK101M6R3ST from CDE represents this category, offering improved performance (2.92 Ohm ESR vs. 3.18 Ohm, 2000 Hrs lifetime vs. 1000 Hrs) with slightly different physical dimensions and lead spacing (0.079" vs. 0.098").

Upgrade Parts (Enhanced Voltage or Temperature Ratings) Upgrade parts increase the rated voltage (10 V or 16 V) or maximum operating temperature (105°C vs. 85°C) while maintaining the same capacitance and physical footprint. These parts provide design margin and extended operational capability. Upgrades are backward-compatible in applications where the original 6.3 V rating is not a limiting constraint.

Key Substitution Parameters:

Capacitance: 100 µF (fixed)
Voltage Rating: 6.3 V minimum (upgrades to 10 V or 16 V acceptable)
Tolerance: ±20% (fixed)
Polarization: Polar (fixed)
Mounting: Through Hole (fixed)
Package: Radial, Can (fixed)
Lead Spacing: 0.098" (2.50mm) preferred; 0.079" (2.00mm) acceptable with PCB redesign
Physical Dimensions: Compatible with 0.248" diameter, height ≤ 0.512" maximum

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance	ESR @ 120Hz (Ohm)	Lifetime @ Temp.	Operating Temp. (°C)	Lead Spacing	Height (Max)	Product Status	Inventory
SS101M6R3ST	Cornell Dubilier Electronics	SS	100	6.3	±20%	3.18	1000 Hrs @ 85°C	-40 ~ 85	0.098" (2.50mm)	0.276" (7.00mm)	Obsolete	801 Pcs
SK101M6R3ST	Cornell Dubilier Electronics	SK	100	6.3	±20%	2.92	2000 Hrs @ 85°C	-40 ~ 85	0.079" (2.00mm)	0.512" (13.00mm)	Active	975 Pcs
6.3MS5100MEFC6.3X5	Rubycon	MS5	100	6.3	±20%	-	1000 Hrs @ 85°C	-40 ~ 85	0.098" (2.50mm)	0.256" (6.50mm)	Obsolete	1746 Pcs
ECE-A0JKS101	Panasonic Electronic Components	KS	100	6.3	±20%	-	1000 Hrs @ 85°C	-40 ~ 85	0.098" (2.50mm)	0.197" (5.00mm)	Active	81525 Pcs
6.3MH5100MEFC6.3X5	Rubycon	MH5	100	6.3	±20%	-	1000 Hrs @ 105°C	-40 ~ 105	0.098" (2.50mm)	0.256" (6.50mm)	Obsolete	1005 Pcs
ECE-A1AKA101	Panasonic Electronic Components	KA	100	10	±20%	-	1000 Hrs @ 85°C	-40 ~ 85	0.098" (2.50mm)	0.276" (7.00mm)	Active	3807 Pcs
ECE-A1CKA101	Panasonic Electronic Components	KA	100	16	±20%	-	1000 Hrs @ 85°C	-40 ~ 85	0.098" (2.50mm)	0.276" (7.00mm)	Active	2568 Pcs
EEA-GA1A101	Panasonic Electronic Components	GA-A	100	10	±20%	-	1000 Hrs @ 105°C	-55 ~ 105	0.098" (2.50mm)	0.276" (7.00mm)	Active	8891 Pcs
UHE1E101MED	Nichicon	UHE	100	25	±20%	-	5000 Hrs @ 105°C	-40 ~ 105	0.098" (2.50mm)	0.433" (11.00mm)	Obsolete	176517 Pcs

Engineering Selection Recommendations

For Direct Replacement (No Design Changes Required):

Select ECE-A0JKS101 (Panasonic) as the primary direct replacement. This part maintains identical electrical specifications (100 µF, 6.3 V, ±20% tolerance) and physical form factor (radial, can, through-hole, 0.098" lead spacing, 0.248" diameter). The part is active in production with substantial inventory (81,525 pcs), ensuring long-term availability. It is ROHS3 compliant and meets all regulatory requirements. The compact height (0.197" vs. 0.276" original) provides additional board clearance without compromising compatibility.

For Enhanced Reliability (Same Footprint):

Select ECE-A1AKA101 (Panasonic, 10 V rating) or EEA-GA1A101 (Panasonic, 10 V rating, 105°C max temperature) when design margins are required. Both parts maintain the identical physical footprint and lead spacing as the original SS101M6R3ST. The 10 V rating provides voltage headroom in applications where the original 6.3 V specification is not a hard constraint. EEA-GA1A101 offers extended temperature range (-55°C to 105°C) and extended lifetime (1000 Hrs @ 105°C), suitable for demanding thermal environments. Both are active products with ROHS3 compliance.

For Maximum Temperature Performance:

Select EEA-GA1A101 (Panasonic) when operating temperatures approach or exceed 85°C. This part is rated to 105°C maximum with 1000 Hrs lifetime at that temperature, compared to the original 85°C rating. The extended operating range (-55°C to 105°C) accommodates extreme thermal conditions. Physical compatibility is maintained with identical lead spacing and diameter.

For Highest Voltage Margin:

Select ECE-A1CKA101 (Panasonic, 16 V rating) when maximum design margin is required. This part maintains the identical physical footprint and lead spacing while providing 16 V rated voltage. It is active in production with ROHS3 compliance.

Avoid:

SK101M6R3ST: While active, this part has different lead spacing (0.079" vs. 0.098") and significantly greater height (0.512" vs. 0.276"), requiring PCB redesign.
UHE1E101MED: Although high-capacity (25 V, 5000 Hrs @ 105°C), this part is obsolete and has excessive height (0.433"), limiting board space compatibility.
6.3MS5100MEFC6.3X5 and 6.3MH5100MEFC6.3X5: Both Rubycon parts are obsolete; active alternatives are preferred.

Frequently Asked Questions (FAQ)

Q: Can I use ECE-A1AKA101 (10 V) in place of SS101M6R3ST (6.3 V)?

A: Yes. The 10 V rated part is electrically compatible in any circuit designed for 6.3 V operation. Higher voltage ratings are backward-compatible and provide additional design margin. No circuit modifications are required. The physical footprint and lead spacing are identical.

Q: What is the difference between ECE-A1AKA101 and EEA-GA1A101?

A: Both are 100 µF, 10 V Panasonic capacitors with identical physical dimensions and lead spacing. The primary differences are: EEA-GA1A101 has extended maximum operating temperature (105°C vs. 85°C), extended operating range (-55°C to 105°C vs. -40°C to 85°C), and higher ripple current capability (170.5 mA @ 100 kHz vs. 136 mA @ 10 kHz). Select EEA-GA1A101 for thermal-demanding applications.

Q: Why does SK101M6R3ST have different lead spacing?

A: SK101M6R3ST uses 0.079" (2.00mm) lead spacing compared to the original 0.098" (2.50mm). This requires PCB hole pattern modification and is not a direct drop-in replacement. Use ECE-A0JKS101 instead for true compatibility.

Q: Is ECE-A0JKS101 truly equivalent to SS101M6R3ST?

A: Yes. ECE-A0JKS101 matches all critical parameters: 100 µF capacitance, 6.3 V rating, ±20% tolerance, radial can package, through-hole mounting, 0.098" lead spacing, and 0.248" diameter. The height is actually shorter (0.197" vs. 0.276"), providing additional clearance. It is ROHS3 compliant and active in production.

Q: Can I substitute a 16 V capacitor for a 6.3 V capacitor?

A: Yes. Higher voltage ratings are always backward-compatible in circuits designed for lower voltages. ECE-A1CKA101 (16 V) can replace SS101M6R3ST (6.3 V) without any circuit modifications. The physical footprint is identical.

Q: What does "obsolete" status mean for component selection?

A: Obsolete status indicates the manufacturer has discontinued production. While existing inventory may be available, long-term supply cannot be guaranteed. For new designs or production requiring multi-year support, select active products such as ECE-A0JKS101, ECE-A1AKA101, ECE-A1CKA101, or EEA-GA1A101.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant, meeting current regulatory requirements for hazardous substance restrictions.

Q: What is ESR and why does it matter?

A: ESR (Equivalent Series Resistance) represents the internal resistance of the capacitor at a specified frequency. Lower ESR improves ripple current handling and reduces heat generation. The original SS101M6R3ST has 3.18 Ohm ESR @ 120 Hz. SK101M6R3ST offers improved performance with 2.92 Ohm ESR. When ESR is not specified in the datasheet, the part meets minimum performance standards for the application category.

Q: Can I use UHE1E101MED as a substitute?

A: UHE1E101MED is not recommended as a primary substitute despite its superior specifications (25 V, 5000 Hrs @ 105°C). This part is obsolete and has excessive height (0.433" vs. 0.276"), which may cause board clearance issues. Use active alternatives such as EEA-GA1A101 instead.

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