Equivalent & Substitute Parts for SN330M6R3ST

Part Overview

The SN330M6R3ST 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, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 1000 hours at 85°C and is suitable for general-purpose applications requiring through-hole mounting.

Key Parameters

Parameter	Value
Capacitance	33 µF
Voltage Rating	6.3 V
Tolerance	±20%
Package Type	Radial, Can
Lead Spacing	0.079" (2.00 mm)
Diameter	0.197" (5.00 mm)
Height (Max)	0.433" (11.00 mm)
Operating Temperature Range	-40°C to 85°C
Mounting Type	Through Hole
Polarization	Bi-Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SN330M6R3ST is determined by strict equivalence in the following parameters:

Critical Parameters for Substitution:

Capacitance value: 33 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage rating: 6.3 V minimum (equal or higher voltage rating is acceptable)
Package type: Radial, Can (exact match required)
Lead spacing: 0.079" (2.00 mm) (exact match required)
Diameter: 0.197" (5.00 mm) (exact match required)
Mounting type: Through Hole (exact match required)
Polarization: Bi-Polar (exact match required)
Operating temperature range: -40°C to 85°C (exact match required)

Acceptable Variations:

Voltage rating may be higher than 6.3 V, provided the circuit design permits
Lifetime at temperature may exceed the original specification
ESR values may differ if not specified as a design constraint
Ripple current ratings may differ based on frequency specifications

Two substitute parts meet these criteria and are categorized as follows:

Similar Substitute (Direct Replacement): ECE-A0JN330U matches all critical parameters identically, including voltage rating of 6.3 V.

Upgrade Substitute (Higher Voltage Rating): ECE-A1AN330U matches all critical parameters except voltage rating, which is rated at 10 V instead of 6.3 V. This part is suitable for applications where higher voltage margin is acceptable.

Parameter Comparison

Parameter	SN330M6R3ST (Main)	ECE-A0JN330U (Similar)	ECE-A1AN330U (Upgrade)
Manufacturer	Cornell Dubilier Electronics	Panasonic Electronic Components	Panasonic Electronic Components
Capacitance	33 µF	33 µF	33 µF
Voltage Rating	6.3 V	6.3 V	10 V
Tolerance	±20%	±20%	±20%
Lead Spacing	0.079" (2.00 mm)	0.079" (2.00 mm)	0.079" (2.00 mm)
Diameter	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Height (Max)	0.433" (11.00 mm)	0.472" (12.00 mm)	0.472" (12.00 mm)
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Lifetime @ 85°C	1000 Hrs	2000 Hrs	2000 Hrs
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can
Polarization	Bi-Polar	Bi-Polar	Bi-Polar
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (ECE-A0JN330U):

The ECE-A0JN330U is the preferred substitute when exact parameter matching is required. This part maintains identical electrical specifications (33 µF, 6.3 V, ±20% tolerance) and mechanical dimensions (0.197" diameter, 0.079" lead spacing, through-hole radial package). The ECE-A0JN330U is manufactured by Panasonic Electronic Components with active product status, ensuring long-term availability and supply chain stability. The part exceeds the original lifetime specification (2000 hours at 85°C versus 1000 hours), providing improved reliability. Both parts are ROHS3 compliant. The maximum height increases from 0.433" to 0.472", which must be verified against PCB layout constraints.

For Upgraded Performance (ECE-A1AN330U):

The ECE-A1AN330U is suitable when circuit design permits operation at higher voltage ratings. This part maintains identical capacitance, tolerance, and mechanical compatibility while providing a 10 V voltage rating instead of 6.3 V. The higher voltage rating offers increased design margin and improved reliability in applications subject to voltage transients or supply variations. Lifetime specification is 2000 hours at 85°C. The maximum height is 0.472", identical to the ECE-A0JN330U. This part is manufactured by Panasonic Electronic Components with active product status and ROHS3 compliance.

Compliance Considerations:

Both substitute parts are ROHS3 compliant and carry ECCN EAR99 classification, matching the regulatory status of the original part. Both are classified as REACH Unaffected. Selection between the two substitutes depends solely on circuit voltage requirements and available PCB height clearance.

Frequently Asked Questions (FAQ)

Q: Can ECE-A1AN330U be used in place of SN330M6R3ST without circuit modification?

A: Yes, provided the circuit design permits operation at 10 V. The higher voltage rating does not affect circuit function in applications designed for 6.3 V operation. The capacitance value (33 µF) and tolerance (±20%) are identical. Physical dimensions are compatible with through-hole PCB layouts designed for the original part, with the exception of maximum height (0.472" versus 0.433"), which must be verified against PCB clearance.

Q: What is the primary difference between ECE-A0JN330U and ECE-A1AN330U?

A: The primary difference is voltage rating: ECE-A0JN330U is rated at 6.3 V (matching the original part), while ECE-A1AN330U is rated at 10 V. All other electrical parameters (capacitance, tolerance, operating temperature range) are identical. Both parts have identical lead spacing (0.079") and diameter (0.197"). Maximum height is 0.472" for both parts, compared to 0.433" for the original.

Q: Are there any height clearance issues when substituting these parts?

A: Yes. Both Panasonic substitutes have a maximum seated height of 0.472", compared to 0.433" for the original SN330M6R3ST. This 0.039" (approximately 1 mm) increase must be verified against PCB layout, component placement, and enclosure clearance requirements before implementation.

Q: Why is the original SN330M6R3ST marked as obsolete?

A: Product obsolescence is determined by the manufacturer and typically reflects end-of-life decisions based on market demand and manufacturing priorities. The Panasonic substitutes (ECE-A0JN330U and ECE-A1AN330U) are active products with confirmed ongoing availability.

Q: Do the substitute parts have different ESR specifications?

A: The original SN330M6R3ST specifies ESR of 9.65 Ohm @ 120 Hz. The Panasonic substitutes do not provide ESR specifications in the available data. If ESR is a critical design parameter, ESR values must be obtained directly from Panasonic datasheets or technical documentation before final selection.

Q: Are both substitute parts suitable for high-frequency ripple current applications?

A: The original part specifies ripple current of 63 mA @ 120 Hz (low frequency). Both Panasonic substitutes specify ripple current of 136 mA @ 10 kHz (high frequency). The higher ripple current rating at higher frequency indicates improved performance characteristics. However, ripple current specifications at 120 Hz are not provided for the substitutes. If low-frequency ripple current is a design constraint, this parameter must be confirmed with Panasonic technical documentation.

Q: What is the inventory status of these parts?

A: SN330M6R3ST: 1089 pieces in stock (obsolete product). ECE-A0JN330U: 6890 pieces in stock (active product). ECE-A1AN330U: 1063 pieces in stock (active product). Inventory levels are subject to change; current availability should be confirmed with the supplier.

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