SS330M6R3ST Equivalent & Substitute Parts Reference

Part Overview

The SS330M6R3ST is a 33 µF, 6.3 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating discontinued production and limited availability in the supply chain. 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 stable capacitance and low equivalent series resistance.

Due to obsolete status and finite inventory (616 pcs), identifying functionally equivalent substitute parts is necessary to ensure design continuity and long-term component availability for production and maintenance applications.

Key Parameters

Parameter	Value	Unit
Capacitance	33	µF
Voltage - Rated	6.3	V
Tolerance	±20%	-
ESR @ 120 Hz	9.65	Ohm
Lifetime @ 85°C	1000	Hrs
Operating Temperature Range	-40°C ~ 85°C	-
Ripple Current @ 120 Hz	42	mA
Ripple Current @ 1 kHz	46.2	mA
Lead Spacing	0.079" (2.00 mm)	-
Case Diameter	0.197" (5.00 mm)	-
Height - Seated (Max)	0.276" (7.00 mm)	-
Mounting Type	Through Hole	-
Package / Case	Radial, Can	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of aluminum electrolytic capacitors is determined by strict compatibility of electrical and mechanical parameters. The following criteria establish valid substitution relationships:

Primary Substitution Criteria:

Capacitance value: 33 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage rating: Equal to or greater than 6.3 V (higher voltage ratings are acceptable in applications with voltage headroom)
Polarization: Polar (required for electrolytic type)
Mounting type: Through Hole (required for PCB compatibility)
Package / Case: Radial, Can (required for form factor compatibility)
Lead spacing: 0.079" (2.00 mm) (required for PCB hole pattern compatibility)
Case diameter: 0.197" (5.00 mm) (required for mechanical fit)

Secondary Compatibility Factors:

Operating temperature range: Minimum -40°C to 85°C required
Lifetime rating: 1000 hours @ 85°C or greater
RoHS3 compliance: Required for regulatory alignment

Substitute parts are categorized as follows:

Direct Equivalent: ECE-A0JKS330 (Panasonic) — Identical electrical specifications and mechanical dimensions; active product status.

Upgrade Substitutes: Parts with higher voltage ratings (10 V or 16 V) that maintain identical capacitance, tolerance, and physical form factor. These provide enhanced voltage margin and are suitable for applications where circuit voltage permits.

Similar Substitutes: Parts with extended lifetime ratings (2000 hours @ 85°C) or enhanced temperature performance that maintain core electrical and mechanical compatibility.

Parameter Comparison

Parameter	SS330M6R3ST (CDE)	ECE-A0JKS330 (Panasonic)	10MS533MEFC5X5 (Rubycon)	ECE-A1CKA330 (Panasonic)	EEA-GA1A330 (Panasonic)	ECA-1CM330 (Panasonic)
Capacitance	33 µF	33 µF	33 µF	33 µF	33 µF	33 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	6.3 V	6.3 V	10 V	16 V	10 V	16 V
ESR @ 120 Hz	9.65 Ohm	Not specified	Not specified	Not specified	Not specified	Not specified
Lifetime @ Temp.	1000 Hrs @ 85°C	1000 Hrs @ 85°C	1000 Hrs @ 85°C	1000 Hrs @ 85°C	1000 Hrs @ 105°C	2000 Hrs @ 85°C
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 105°C	-40°C ~ 85°C
Ripple Current @ 120 Hz	42 mA	38 mA	45 mA	60 mA	50 mA	110 mA
Lead Spacing	0.079" (2.00 mm)	0.079" (2.00 mm)	0.079" (2.00 mm)	0.079" (2.00 mm)	0.079" (2.00 mm)	0.079" (2.00 mm)
Case Diameter	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Height - Seated (Max)	0.276" (7.00 mm)	0.197" (5.00 mm)	0.256" (6.50 mm)	0.276" (7.00 mm)	0.276" (7.00 mm)	0.472" (12.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Product Status	Obsolete	Active	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Selection:

ECE-A0JKS330 (Panasonic Electronic Components) is the primary direct equivalent. This part maintains identical capacitance (33 µF), tolerance (±20%), voltage rating (6.3 V), and mechanical dimensions. The part is in active production status, ensuring long-term availability and supply chain stability. RoHS3 compliance and REACH unaffected status align with regulatory requirements. Current inventory of 1070 pcs supports immediate procurement. The slightly reduced height (5.00 mm vs. 7.00 mm) and lower ripple current at 120 Hz (38 mA vs. 42 mA) represent minor variations that do not affect functional compatibility in general-purpose applications.

Upgrade Substitute Selection:

For applications where circuit design permits higher voltage operation, three upgrade options provide enhanced performance characteristics:

10MS533MEFC5X5 (Rubycon) — 10 V rated voltage with 45 mA ripple current at 120 Hz. Obsolete status limits long-term availability despite current inventory of 5144 pcs.

ECE-A1CKA330 (Panasonic Electronic Components) — 16 V rated voltage with 60 mA ripple current at 120 Hz. Active product status ensures sustained availability. Height matches original specification (7.00 mm). Suitable for designs requiring voltage margin above 6.3 V.

EEA-GA1A330 (Panasonic Electronic Components) — 10 V rated voltage with extended operating temperature range (-55°C to 105°C) and 1000 hours lifetime at 105°C. Active product status. Recommended for applications requiring enhanced thermal performance or wider temperature operation. Height matches original specification (7.00 mm).

Similar Substitute Selection:

ECA-1CM330 (Panasonic Electronic Components) — 16 V rated voltage with doubled lifetime rating (2000 hours @ 85°C) and significantly elevated ripple current capability (110 mA @ 120 Hz). Active product status with highest inventory (19777 pcs). Height of 12.00 mm exceeds original specification and requires PCB layout verification. Recommended for applications demanding extended operational life and higher ripple current handling.

Selection Criteria Summary:

Immediate replacement with identical specifications: ECE-A0JKS330
Higher voltage margin required: ECE-A1CKA330 or 10MS533MEFC5X5
Extended temperature performance: EEA-GA1A330
Extended lifetime and ripple current: ECA-1CM330 (verify PCB height clearance)

All recommended substitutes maintain RoHS3 compliance and through-hole radial can package format with 2.00 mm lead spacing and 5.00 mm case diameter.

Frequently Asked Questions (FAQ)

Q: Can ECE-A0JKS330 be used as a direct replacement for SS330M6R3ST?

A: Yes. ECE-A0JKS330 maintains identical capacitance (33 µF), tolerance (±20%), voltage rating (6.3 V), lead spacing (2.00 mm), case diameter (5.00 mm), and mounting type (through-hole radial). The height difference (5.00 mm vs. 7.00 mm) is a minor variation that does not affect electrical function. Active product status ensures availability.

Q: What is the difference between direct equivalent and upgrade substitutes?

A: Direct equivalents (ECE-A0JKS330) match all electrical and mechanical specifications of the original part. Upgrade substitutes (10MS533MEFC5X5, ECE-A1CKA330, EEA-GA1A330) feature higher voltage ratings (10 V or 16 V) while maintaining identical capacitance and physical form factor. Upgrade substitutes are suitable only when circuit design permits operation at the higher voltage rating.

Q: Why does ECA-1CM330 have a different height (12.00 mm)?

A: ECA-1CM330 is designed with extended lifetime (2000 hours @ 85°C) and higher ripple current capability (110 mA @ 120 Hz). The increased internal volume accommodates these enhanced performance characteristics. PCB layout must be verified to confirm adequate vertical clearance before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (ECE-A0JKS330, 10MS533MEFC5X5, ECE-A1CKA330, EEA-GA1A330, ECA-1CM330) are RoHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.

Q: Which substitute offers the best long-term availability?

A: ECE-A0JKS330, ECE-A1CKA330, EEA-GA1A330, and ECA-1CM330 all carry active product status, ensuring sustained manufacturing and supply chain availability. The original SS330M6R3ST is obsolete and should not be relied upon for future procurement.

Q: Can I use a 16 V rated capacitor in a circuit designed for 6.3 V?

A: Yes. Higher voltage-rated capacitors (ECE-A1CKA330 or ECA-1CM330 at 16 V) are electrically compatible with circuits designed for 6.3 V operation. The capacitor will operate safely at voltages below its rated voltage. This substitution provides voltage margin and is acceptable from an engineering standpoint.

Q: What is the significance of ripple current ratings?

A: Ripple current rating indicates the maximum AC current the capacitor can handle without exceeding temperature limits. Higher ripple current capability (ECA-1CM330 at 110 mA @ 120 Hz vs. SS330M6R3ST at 42 mA @ 120 Hz) allows operation in applications with greater AC stress. Substitutes with equal or higher ripple current ratings are compatible; lower ratings require circuit analysis.

Q: Does lead spacing affect PCB compatibility?

A: Yes. All listed substitutes maintain 0.079" (2.00 mm) lead spacing, matching the original SS330M6R3ST. This ensures direct PCB hole pattern compatibility without layout modification. Any substitute with different lead spacing would require PCB redesign.

Q: What is the operating temperature range significance?

A: Operating temperature range defines the ambient conditions under which the capacitor functions within specification. SS330M6R3ST operates -40°C to 85°C. EEA-GA1A330 extends this to -55°C to 105°C, suitable for applications requiring wider temperature operation. All other substitutes maintain the original -40°C to 85°C range.

Q: Is inventory quantity a factor in substitute selection?

A: Inventory quantity indicates current stock availability but should not be the primary selection criterion. Product status (active vs. obsolete) is more significant for long-term design continuity. ECE-A0JKS330 (1070 pcs) and ECA-1CM330 (19777 pcs) offer strong availability; 10MS533MEFC5X5 is obsolete despite higher current inventory.

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