SN330M016ST

Part Overview

The SN330M016ST is a 33 µF, 16 V aluminum electrolytic capacitor in radial configuration manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making it necessary to identify suitable substitute parts for ongoing system support and new designs. The original part features 6.84 Ω equivalent series resistance at 120 Hz and a rated lifetime of 1000 hours at 85°C, with operating temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN330M016ST
Manufacturer	Cornell Dubilier Electronics (CDE)
Capacitance	33 µF
Tolerance	±20%
Voltage Rating	16 V
ESR @ 120 Hz	6.84 Ω
Lifetime @ 85°C	1000 Hrs
Operating Temperature Range	-40°C to 85°C
Ripple Current @ 120 Hz	98 mA
Package	Radial, Can
Lead Spacing	0.138" (3.50 mm)
Size / Diameter	0.315" (8.00 mm)
Height - Seated (Max)	0.453" (11.50 mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution validity is determined by the following critical parameters: capacitance (33 µF), tolerance (±20%), voltage rating, mechanical package dimensions (0.315" diameter, 0.453" seated height, 0.138" lead spacing), radial configuration, through-hole mounting, and RoHS compliance.

All identified substitutes maintain identical capacitance, tolerance, and physical package specifications. Voltage ratings in substitute parts (35 V and 50 V) exceed the original 16 V requirement, ensuring compatibility in applications rated for 16 V operation. Operating temperature range (-40°C to 85°C) and polarization (bi-polar) are consistent across all candidates.

The substitute parts differ in product status (active versus not for new designs) and rated lifetime at 85°C (2000 hours versus 1000 hours), representing improvements in reliability metrics.

Parameter Comparison

Parameter	SN330M016ST (CDE)	ECE-A1HN330U (Panasonic)	ECE-A1VN330U (Panasonic)	UVP1H330MPD (Nichicon)
Capacitance	33 µF	33 µF	33 µF	33 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage Rating	16 V	50 V	35 V	50 V
Lifetime @ 85°C	1000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs
Operating Temperature Range	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Ripple Current @ 120 Hz	98 mA	110 mA	100 mA	105 mA
Lead Spacing	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)
Size / Diameter	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)
Height - Seated (Max)	0.453" (11.50 mm)	0.453" (11.50 mm)	0.453" (11.50 mm)	0.512" (13.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Not For New Designs

Engineering Selection Recommendations

For applications requiring direct replacement of the SN330M016ST, the Panasonic ECE-A1HN330U and ECE-A1VN330U are preferred selections. Both parts are in active product status with ROHS3 compliance and extended lifetime ratings of 2000 hours at 85°C. These parts are mechanically and electrically compatible with the original design, offering higher voltage ratings (50 V and 35 V respectively) that provide margin in the original 16 V application context.

The Nichicon UVP1H330MPD is electrically compatible and mechanically equivalent except for height (0.512" versus 0.453"), making it suitable only for applications with sufficient PCB clearance. This part is designated "Not For New Designs" and should be reserved for legacy system support where sourcing constraints apply.

The original SN330M016ST obsolete status necessitates migration to active parts. ECE-A1VN330U (35 V rating) is optimal for applications operating below 35 V, while ECE-A1HN330U (50 V rating) is appropriate for higher voltage margin requirements.

Frequently Asked Questions (FAQ)

Q: Can ECE-A1HN330U and ECE-A1VN330U be used interchangeably with SN330M016ST?

A: Yes. Both Panasonic parts maintain the critical specifications: 33 µF capacitance, ±20% tolerance, identical physical dimensions (0.315" diameter, 0.453" height, 0.138" lead spacing), radial through-hole configuration, and operating temperature range of -40°C to 85°C. The higher voltage ratings (50 V and 35 V) are compatible with 16 V applications.

Q: What is the mechanical difference between UVP1H330MPD and other substitutes?

A: UVP1H330MPD has a seated height of 0.512" compared to 0.453" for other candidates. This 0.059" height difference requires verification of PCB layout clearances before substitution. All other mechanical parameters (diameter, lead spacing, package type) are identical.

Q: Are all substitutes RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the original SN330M016ST specification.

Q: Which substitute is recommended for new designs?

A: Panasonic ECE-A1HN330U or ECE-A1VN330U are recommended for new designs. Both are active products with 2000-hour lifetime ratings at 85°C. The Nichicon UVP1H330MPD is designated "Not For New Designs" and should not be selected for applications under development.

Q: How do ripple current specifications affect substitution decisions?

A: The substitute parts (100–110 mA at 120 Hz) all exceed or meet the original specification of 98 mA at 120 Hz, ensuring adequate performance in the application. Selection between substitutes based on ripple current is not a limiting factor.

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