SS330M025ST Equivalent & Substitute Parts

Part Overview

The SS330M025ST is a 33 µF, 25 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, with 985 pieces currently in stock. The part operates across a temperature range of -40°C to 85°C and is designed for general-purpose applications requiring polar electrolytic capacitance. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Capacitance	33	µF
Voltage - Rated	25	V
Tolerance	±20%	-
ESR @ 120 Hz	6.03	Ohm
Lifetime @ 85°C	1000	Hrs
Operating Temperature Range	-40°C ~ 85°C	-
Ripple Current @ 120 Hz	63	mA
Ripple Current @ 1 kHz	69.3	mA
Lead Spacing	0.098" (2.50 mm)	-
Size / Dimension	0.236" Dia (6.00 mm)	-
Height - Seated (Max)	0.276" (7.00 mm)	-
Mounting Type	Through Hole	-
Package / Case	Radial, Can	-
RoHS Status	ROHS3 Compliant	-
Polarization	Polar	-

Substitute Part Grouping Explanation

Substitution of the SS330M025ST is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Direct Substitution:

Capacitance: 33 µF (exact match required)
Voltage Rating: 25 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Lead Spacing: 0.098" (2.50 mm) (exact match required)

Parameters Allowing Variation:

ESR: Lower values indicate improved performance
Lifetime @ Temperature: Extended lifetimes provide enhanced reliability
Operating Temperature Range: Extended ranges provide design flexibility
Ripple Current: Higher values indicate improved current handling
Physical Dimensions: Minor variations within can diameter and height are acceptable within mechanical constraints

Substitute parts are grouped into three categories:

Direct Equivalents: Parts matching all critical parameters with identical or superior electrical performance characteristics.

Upgrade Substitutes: Parts exceeding the original specification in voltage rating, temperature range, or lifetime, suitable for applications requiring enhanced performance margins.

Similar Alternatives: Parts from the same manufacturer series with compatible electrical and mechanical specifications.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	ESR (Ohm)	Lifetime @ 85°C (Hrs)	Operating Temp (°C)	Lead Spacing (mm)	Can Dia (mm)	Height (mm)	Product Status	RoHS Status
SS330M025ST	Cornell Dubilier Electronics	33	25	±20%	6.03	1000	-40 ~ 85	2.50	6.00	7.00	Obsolete	ROHS3 Compliant
SK330M025ST	Cornell Dubilier Electronics	33	25	±20%	5.63	2000	-40 ~ 85	2.00	5.00	13.00	Active	ROHS3 Compliant
ECE-A1EKA330	Panasonic Electronic Components	33	25	±20%	-	1000	-40 ~ 85	2.50	6.30	7.00	Active	ROHS3 Compliant
ECE-A1EKS330	Panasonic Electronic Components	33	25	±20%	-	1000	-40 ~ 85	2.50	6.30	6.00	Active	ROHS3 Compliant
25MH533MEFC6.3X5	Rubycon	33	25	±20%	-	1000 @ 105°C	-40 ~ 105	2.50	6.30	6.50	Obsolete	ROHS3 Compliant
ECE-A1VKA330	Panasonic Electronic Components	33	35	±20%	-	1000	-40 ~ 85	2.50	6.30	7.00	Active	ROHS3 Compliant
EEA-GA1E330	Panasonic Electronic Components	33	25	±20%	-	1000 @ 105°C	-55 ~ 105	2.50	6.30	7.00	Active	ROHS3 Compliant
ECA-1JM330	Panasonic Electronic Components	33	63	±20%	-	2000	-40 ~ 85	2.50	6.30	12.20	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

ECE-A1EKS330 and ECE-A1EKA330 from Panasonic Electronic Components are direct functional equivalents to the SS330M025ST. Both parts maintain the 33 µF capacitance, 25 V voltage rating, ±20% tolerance, and -40°C to 85°C operating temperature range. ECE-A1EKS330 is preferred due to active product status and highest inventory availability (59,182 pieces). Both parts are ROHS3 compliant and suitable for general-purpose applications.

For Enhanced Reliability (Extended Lifetime):

SK330M025ST from Cornell Dubilier Electronics provides doubled lifetime (2000 hours at 85°C) compared to the original specification. This part maintains electrical equivalence while offering improved long-term reliability. Active product status ensures continued availability.

For Extended Temperature Operation:

EEA-GA1E330 from Panasonic Electronic Components extends the operating temperature range to -55°C to 105°C and provides 1000-hour lifetime at 105°C. This part is suitable for applications requiring enhanced thermal performance. Active product status and high inventory (5,642 pieces) support procurement continuity.

For Voltage Margin Applications:

ECE-A1VKA330 from Panasonic Electronic Components provides a 35 V voltage rating while maintaining 33 µF capacitance and ±20% tolerance. This part is suitable for applications requiring additional voltage safety margin. Active product status ensures availability.

For High-Voltage Applications:

ECA-1JM330 from Panasonic Electronic Components provides 63 V voltage rating with extended 2000-hour lifetime at 85°C. This part is suitable for applications requiring significantly higher voltage ratings than the original specification.

All recommended substitutes are ROHS3 compliant and maintain through-hole radial can package configuration compatible with the original design footprint.

Frequently Asked Questions (FAQ)

Q: Can ECE-A1EKS330 directly replace SS330M025ST without circuit modification?

A: Yes. ECE-A1EKS330 maintains identical capacitance (33 µF), voltage rating (25 V), tolerance (±20%), polarization (polar), and through-hole radial can package. Lead spacing (2.50 mm) and mechanical footprint are compatible. No circuit modification is required.

Q: What is the difference between ECE-A1EKA330 and ECE-A1EKS330?

A: Both parts are 33 µF, 25 V aluminum electrolytic capacitors from Panasonic with identical electrical specifications. The primary difference is physical height: ECE-A1EKA330 has 7.00 mm seated height, while ECE-A1EKS330 has 6.00 mm seated height. ECE-A1EKS330 is preferred for space-constrained applications.

Q: Why is EEA-GA1E330 listed as an upgrade substitute?

A: EEA-GA1E330 extends the operating temperature range to -55°C to 105°C and provides 1000-hour lifetime at 105°C, compared to the original -40°C to 85°C range and 1000-hour lifetime at 85°C. This provides enhanced thermal performance for applications requiring extended temperature operation.

Q: Can ECE-A1VKA330 (35 V) be used in place of SS330M025ST (25 V)?

A: Yes. ECE-A1VKA330 is a voltage upgrade substitute. The higher 35 V rating provides additional safety margin in 25 V applications. All other electrical parameters (33 µF capacitance, ±20% tolerance) and mechanical specifications remain compatible.

Q: What is the inventory status of recommended substitutes?

A: ECE-A1EKS330 has the highest availability with 59,182 pieces in stock. ECE-A1EKA330 has 643 pieces. EEA-GA1E330 has 5,642 pieces. SK330M025ST has 1,160 pieces. All recommended substitutes are in active production or available from current inventory.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant, matching the compliance status of the original SS330M025ST.

Q: What is the lead spacing difference between SS330M025ST and substitute parts?

A: SS330M025ST has 2.50 mm lead spacing. SK330M025ST has 2.00 mm lead spacing. All Panasonic substitutes (ECE-A1EKA330, ECE-A1EKS330, ECE-A1VKA330, EEA-GA1E330, ECA-1JM330) maintain 2.50 mm lead spacing, ensuring PCB footprint compatibility with the original design.

Q: Can SK330M025ST be used as a direct replacement despite different lead spacing?

A: SK330M025ST has 2.00 mm lead spacing compared to the original 2.50 mm. While electrical specifications are compatible, PCB footprint modification is required. Lead spacing difference must be evaluated against specific board layout constraints.

Q: Which substitute offers the best combination of availability and performance?

A: ECE-A1EKS330 provides optimal selection criteria: active product status, highest inventory availability (59,182 pieces), direct electrical equivalence, compatible lead spacing (2.50 mm), and ROHS3 compliance. This part is recommended for new designs and ongoing production.

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