Equivalent & Substitute Parts for SS3R3M050ST

Part Overview

The SS3R3M050ST is a 3.3 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 1000 hours at 85°C, suitable for general-purpose applications requiring polar electrolytic capacitance.

Key Parameters

Parameter	Value
Capacitance	3.3 µF
Voltage Rating	50 V
Tolerance	±20%
Package Type	Radial, Can
Mounting Type	Through Hole
Operating Temperature Range	-40°C to 85°C
Polarization	Polar
Lead Spacing	0.059" (1.50 mm)
Case Diameter	0.157" (4.00 mm)
Height (Seated Max)	0.276" (7.00 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SS3R3M050ST is determined by the following critical parameters:

Primary Matching Criteria:

Capacitance: 3.3 µF (exact match required)
Voltage Rating: 50 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Secondary Compatibility Criteria:

Lead Spacing: 0.059" (1.50 mm) preferred for direct PCB compatibility
Case Diameter: 0.157" (4.00 mm) preferred for mechanical fit
Height: Physical clearance consideration
Operating Temperature Range: -40°C to 85°C minimum
RoHS3 Compliance: Environmental and regulatory requirement

All substitute parts listed meet the primary matching criteria. Variations in secondary parameters are noted to enable informed selection based on specific application constraints.

Parameter Comparison

Parameter	SS3R3M050ST (Main)	SK3R3M050ST	ECE-A1HKS3R3	EEA-GA1H3R3	ECE-A1HKA3R3
Manufacturer	CDE	CDE	Panasonic	Panasonic	Panasonic
Series	SS	SK	KS	GA-A	KA
Capacitance	3.3 µF	3.3 µF	3.3 µF	3.3 µF	3.3 µF
Voltage Rating	50 V	50 V	50 V	50 V	50 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Product Status	Obsolete	Active	Active	Active	Active
Lifetime @ Temp.	1000 Hrs @ 85°C	2000 Hrs @ 85°C	1000 Hrs @ 85°C	1000 Hrs @ 105°C	1000 Hrs @ 85°C
Operating Temp. Range	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-55°C to 105°C	-40°C to 85°C
Lead Spacing	0.059" (1.50 mm)	0.079" (2.00 mm)	0.059" (1.50 mm)	0.059" (1.50 mm)	0.059" (1.50 mm)
Case Diameter	0.157" (4.00 mm)	0.197" (5.00 mm)	0.157" (4.00 mm)	0.157" (4.00 mm)	0.157" (4.00 mm)
Height (Seated Max)	0.276" (7.00 mm)	0.512" (13.00 mm)	0.236" (6.00 mm)	0.276" (7.00 mm)	0.276" (7.00 mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can

Engineering Selection Recommendations

Direct Replacement (Preferred): ECE-A1HKS3R3, EEA-GA1H3R3, and ECE-A1HKA3R3 are direct substitutes with identical lead spacing (0.059" / 1.50 mm), case diameter (0.157" / 4.00 mm), and height specifications matching or compatible with the SS3R3M050ST. All three are manufactured by Panasonic Electronic Components and carry active product status with ROHS3 compliance.

Alternative Replacement (Mechanical Adaptation Required): SK3R3M050ST is an active CDE product offering extended lifetime (2000 hours at 85°C versus 1000 hours). However, this part features different lead spacing (0.079" / 2.00 mm) and larger case dimensions (0.197" diameter, 0.512" height), requiring PCB layout verification and mechanical clearance assessment before implementation.

Enhanced Temperature Performance: EEA-GA1H3R3 extends the operating temperature range to -55°C to 105°C with rated lifetime of 1000 hours at 105°C, suitable for applications requiring higher temperature operation. This part maintains identical lead spacing and case diameter as the main part.

Selection Basis: All substitute parts are ROHS3 compliant and rated for general-purpose applications. Product status (active versus obsolete) ensures long-term availability and supply chain continuity. Selection should prioritize parts with matching mechanical dimensions to minimize PCB redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can SK3R3M050ST be used as a direct replacement without PCB modification?

A: No. SK3R3M050ST has different lead spacing (0.079" versus 0.059") and larger case dimensions. PCB layout verification is required. The part is mechanically incompatible with existing through-hole pad patterns designed for SS3R3M050ST.

Q: What is the primary advantage of ECE-A1HKA3R3 over the main part?

A: ECE-A1HKA3R3 is an active product with identical electrical and mechanical specifications to SS3R3M050ST, ensuring long-term availability. The main part is obsolete, creating supply chain risk.

Q: Is EEA-GA1H3R3 suitable for applications operating above 85°C?

A: Yes. EEA-GA1H3R3 is rated for operation up to 105°C with a lifetime of 1000 hours at that temperature. It maintains the same lead spacing and case diameter as SS3R3M050ST, enabling direct PCB compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting environmental and regulatory requirements equivalent to the main part.

Q: What is the difference between ECE-A1HKS3R3 and ECE-A1HKA3R3?

A: Both are Panasonic products with identical capacitance, voltage, tolerance, lead spacing, and case dimensions. ECE-A1HKS3R3 (KS series) and ECE-A1HKA3R3 (KA series) differ in internal design and ripple current specifications. ECE-A1HKA3R3 has higher inventory availability (63,581 pcs versus 3,891 pcs).

Q: Can the main part SS3R3M050ST be restocked?

A: No. SS3R3M050ST is classified as obsolete. Active substitute parts must be selected for new designs and ongoing production.

Q: What is the impact of lead spacing differences on PCB design?

A: Lead spacing determines the distance between through-hole pads on the PCB. SK3R3M050ST (0.079" spacing) requires different pad patterns than SS3R3M050ST (0.059" spacing). Direct substitution without PCB modification is not possible.

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