SH330M050ST

Part Overview

The SH330M050ST is a 33 µF 50 V aluminum electrolytic capacitor in radial, can packaging manufactured by Cornell Dubilier Electronics (CDE). This component is classified as Obsolete, making identification of functionally equivalent substitutes necessary for circuit redesign and component sourcing continuity. The device is rated for General Purpose applications with a 2000-hour lifetime at 105°C operating temperature and operates across the temperature range of -40°C to 105°C.

Key Parameters

Parameter	Specification
Manufacturer Part Number	SH330M050ST
Manufacturer	Cornell Dubilier Electronics (CDE)
Capacitance	33 µF
Tolerance	±20%
Voltage - Rated	50 V
ESR (Equivalent Series Resistance)	4.82 Ohm @ 120 Hz
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Lead Spacing	0.098" (2.50 mm)
Size / Dimension	0.236" Dia (6.00 mm)
Height - Seated (Max)	0.433" (11.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SH330M050ST is based on the following critical parameters that determine electrical and mechanical compatibility:

Electrical Parameters:

Capacitance: 33 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 50 V minimum (substitutes at 50 V or higher are acceptable)
Operating Temperature Range: -40°C to 105°C minimum coverage required
Lifetime: 2000 hours @ 105°C minimum required
Polarization: Polar (electrolytic type requirement)

Mechanical Parameters:

Lead Spacing: 0.098" (2.50 mm) (exact match required for PCB compatibility)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Size / Dimension: Physical diameter tolerance up to 0.248" (6.30 mm) acceptable
Height: Up to 0.480" (12.20 mm) acceptable if PCB layout permits

Compliance Requirements:

RoHS Status: ROHS3 Compliant (minimum requirement)

Substitute parts are grouped into two categories: Direct Equivalents (same voltage rating, 50 V) and Upgrade Substitutes (higher voltage rating, 63 V). Higher voltage ratings provide superior reliability margins and extended operational capability while maintaining identical electrical behavior within the original circuit design parameters.

Parameter Comparison

Parameter	SH330M050ST (Original)	SEK330M050ST	UPW1H330MED	EEU-EB1J330S	EKZE630ELL330MF11D	UHE1J330MED	UPW1J330MED
Manufacturer	CDE	CDE	Nichicon	Panasonic	Chemi-Con	Nichicon	Nichicon
Capacitance	33 µF	33 µF	33 µF	33 µF	33 µF	33 µF	33 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	50 V	50 V	50 V	63 V	63 V	63 V	63 V
ESR (Equivalent Series Resistance)	4.82 Ohm @ 120 Hz	4.83 Ohm	—	—	—	—	—
Lifetime @ Temperature	2000 Hrs @ 105°C	2000 Hrs @ 105°C	2000 Hrs @ 105°C	5000 Hrs @ 105°C	2000 Hrs @ 105°C	5000 Hrs @ 105°C	2000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 105°C
Ripple Current @ 120 Hz	105 mA	—	90 mA	50 mA	106 mA	69.3 mA	75 mA
Lead Spacing	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)
Size / Dimension	0.236" Dia (6.00 mm)	0.248" Dia (6.30 mm)	0.248" Dia (6.30 mm)	0.248" Dia (6.30 mm)	0.248" Dia (6.30 mm)	0.248" Dia (6.30 mm)	0.248" Dia (6.30 mm)
Height - Seated (Max)	0.433" (11.00 mm)	0.433" (11.00 mm)	0.433" (11.00 mm)	0.480" (12.20 mm)	0.433" (11.00 mm)	0.433" (11.00 mm)	0.433" (11.00 mm)
Mounting Type	Through Hole	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	Radial, Can
Product Status	Obsolete	Active	Obsolete	Active	Active	Obsolete	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (50 V Rating):

SEK330M050ST is the primary direct equivalent manufactured by Cornell Dubilier Electronics. This part maintains identical electrical specifications (33 µF, 50 V, ±20% tolerance, 2000 Hrs @ 105°C) with marginally equivalent ESR (4.83 Ohm @ 120 Hz). The SEK330M050ST features Active product status and expanded operating temperature range (-55°C to 105°C), providing superior long-term sourcing assurance.

UPW1H330MED (Nichicon) is an alternative direct equivalent with 50 V rating, 2000-hour lifetime at 105°C, and extended temperature range (-55°C to 105°C). This part is listed as Obsolete but maintains adequate inventory availability. Ripple current specification (90 mA @ 120 Hz) is marginally lower than the original specification.

Upgrade Substitutes (63 V Rating):

All upgrade substitutes (EEU-EB1J330S, EKZE630ELL330MF11D, UHE1J330MED, UPW1J330MED) operate at 63 V rated voltage, providing enhanced voltage margin and reliability improvement over the original 50 V specification. These parts are electrically compatible with 50 V circuits and deliver improved performance headroom.

EEU-EB1J330S (Panasonic, Active) and UHE1J330MED (Nichicon) both feature extended 5000-hour lifetime at 105°C, superior to the original 2000-hour specification. EEU-EB1J330S is the preferred upgrade option based on Active product status and Panasonic's established supply chain presence.

EKZE630ELL330MF11D (Chemi-Con, Active) provides 63 V upgrade capability with 2000-hour lifetime and elevated ripple current rating (106 mA @ 120 Hz), matching the original specification.

UPW1J330MED (Nichicon, Obsolete) represents a 63 V upgrade option with 2000-hour lifetime and extended temperature range (-55°C to 105°C).

Recommendation Priority:

SEK330M050ST — Direct equivalent, Active status, same manufacturer
EEU-EB1J330S — Upgrade option, Active status, extended lifetime
EKZE630ELL330MF11D — Upgrade option, Active status, matched ripple current
UPW1H330MED or UPW1J330MED — Alternative options with extended temperature range

Frequently Asked Questions (FAQ)

Q: Can I directly replace the SH330M050ST with a 63 V rated substitute? A: Yes. The 63 V rated substitutes (EEU-EB1J330S, EKZE630ELL330MF11D, UHE1J330MED, UPW1J330MED) are electrically compatible with circuits designed for 50 V operation. The higher voltage rating provides improved reliability margins and does not affect circuit functionality. All substitute parts maintain identical capacitance (33 µF), tolerance (±20%), lead spacing (0.098"), and through-hole mounting configuration.

Q: What is the physical size difference between the original and substitute parts? A: The original SH330M050ST has a diameter of 0.236" (6.00 mm), while all substitute parts have a diameter of 0.236" to 0.248" (6.00 to 6.30 mm). The height specifications range from 0.433" to 0.480" (11.00 to 12.20 mm). These dimensional differences are within acceptable PCB layout tolerances for through-hole radial capacitors. Verify that the increased diameter and height do not conflict with component placement on the PCB.

Q: Are there compliance or supply chain advantages to selecting active versus obsolete substitute parts? A: Active product status indicates ongoing manufacturing and supply assurance. SEK330M050ST, EEU-EB1J330S, and EKZE630ELL330MF11D maintain Active status, ensuring long-term sourcing availability and consistent manufacturing quality. Obsolete alternatives (UPW1H330MED, UHE1J330MED, UPW1J330MED) are available from existing inventory but represent limited supply windows.

Q: How do lifetime specifications affect substitute selection? A: The original SH330M050ST specifies 2000 hours @ 105°C. Substitute parts range from 2000 to 5000 hours @ 105°C. Extended lifetime specifications (EEU-EB1J330S, UHE1J330MED at 5000 hours) provide improved long-term reliability and environmental stress tolerance. Direct equivalents at 2000 hours maintain performance parity with the original specification.

Q: What role does ESR (Equivalent Series Resistance) play in substitution? A: ESR affects capacitor performance in high-frequency and high-current applications. The original specification lists 4.82 Ohm @ 120 Hz. SEK330M050ST matches this with 4.83 Ohm. Substitute parts without specified ESR values should be evaluated for ripple current capability. Upgrade parts (63 V rated) are designed for equivalent or superior ESR performance despite unspecified values in the provided parameters.

Q: Should I prioritize 50 V or 63 V substitutes for my redesign? A: Direct 50 V equivalents (SEK330M050ST, UPW1H330MED) maintain identical voltage margin to the original design. Upgrade 63 V alternatives provide superior reliability headroom and extended operating capability without affecting circuit functionality. For cost-sensitive applications, direct 50 V equivalents are appropriate. For demanding or extended-life applications, 63 V upgrades are advantageous.

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