SH330M025ST Equivalent & Substitute Parts Reference

Part Overview

The SH330M025ST 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 811 pieces currently in stock. The part operates across a temperature range of -40°C to 105°C with a rated lifetime of 2000 hours at 105°C, suitable for general-purpose applications requiring stable capacitance and low equivalent series resistance.

Due to the obsolete status of the SH330M025ST, equivalent and substitute parts from active manufacturers provide continuity for new designs, production restocking, and field replacements. Substitute parts maintain the core electrical specifications while offering improved availability, extended product lifecycles, and enhanced performance characteristics in select categories.

Key Parameters

Parameter	Value	Unit
Capacitance	33	µF
Voltage - Rated	25	V
Tolerance	±20%	—
ESR @ 120 Hz	6.43	Ohm
Lifetime @ 105°C	2000	Hrs
Operating Temperature Range	-40°C to 105°C	—
Ripple Current @ 120 Hz	75	mA
Ripple Current @ 10 kHz	90	mA
Lead Spacing	0.079" (2.00 mm)	—
Case Diameter	0.197" (5.00 mm)	—
Height - Seated (Max)	0.433" (11.00 mm)	—
Mounting Type	Through Hole	—
Package / Case	Radial, Can	—
Polarization	Polar	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SH330M025ST is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Must Match):

Capacitance: 33 µF (±20% tolerance)
Voltage Rating: 25 V minimum
Polarization: Polar
Mounting Type: Through Hole
Package / Case: Radial, Can
Lead Spacing: 0.079" (2.00 mm)
Case Diameter: 0.197" (5.00 mm)

Secondary Compatibility Parameters (Allowable Variation):

Operating Temperature Range: Minimum -40°C to 105°C
Lifetime @ 105°C: 2000 hours or greater
Ripple Current @ 120 Hz: 75 mA or greater
Ripple Current @ 10 kHz: 90 mA or greater
Height - Seated (Max): Physical fit within circuit board constraints

Voltage Rating Upgrade Path: Parts rated at 35 V are acceptable substitutes for 25 V applications, as higher voltage ratings provide additional safety margin and component reliability without affecting circuit functionality.

Substitute parts are grouped into two categories:

Direct Equivalents (Same Voltage Rating - 25 V): SEK330M025ST, UPW1E330MDD
Upgraded Substitutes (Higher Voltage Rating - 35 V): EEU-EB1V330S, EKZE350ELL330ME11D, UHE1V330MDD, UPW1V330MDD

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	ESR @ 120 Hz (Ohm)	Lifetime @ 105°C (Hrs)	Operating Temp (°C)	Ripple Current @ 120 Hz (mA)	Ripple Current @ 10 kHz (mA)	Height (mm)	Product Status
SH330M025ST	Cornell Dubilier Electronics	33	25	±20%	6.43	2000	-40 to 105	75	90	11.00	Obsolete
SEK330M025ST	Cornell Dubilier Electronics	33	25	±20%	6.43	2000	-55 to 105	75	90	13.00	Active
UPW1E330MDD	Nichicon	33	25	±20%	—	2000	-55 to 105	54	180	11.00	Obsolete
EEU-EB1V330S	Panasonic Electronic Components	33	35	±20%	—	5000	-40 to 105	46	59.8	12.00	Active
EKZE350ELL330ME11D	Chemi-Con	33	35	±20%	—	2000	-40 to 105	100	250	12.50	Active
UHE1V330MDD	Nichicon	33	35	±20%	—	5000	-40 to 105	115.5	210	11.00	Obsolete
UPW1V330MDD	Nichicon	33	35	±20%	—	2000	-55 to 105	54	180	11.00	Obsolete

Engineering Selection Recommendations

For Direct Replacement (Same Voltage Rating - 25 V):

SEK330M025ST is the preferred direct equivalent. This part is manufactured by the same supplier (Cornell Dubilier Electronics) and maintains identical electrical specifications (33 µF, 25 V, ±20%, 6.43 Ohm ESR @ 120 Hz, 2000 Hrs @ 105°C). The SEK330M025ST carries Active product status, ensuring long-term availability and supply chain continuity. The extended operating temperature range (-55°C to 105°C versus -40°C to 105°C) provides additional thermal margin. Height increase from 11.00 mm to 13.00 mm requires verification of available board space.

UPW1E330MDD (Nichicon) provides an alternative 25 V equivalent with identical physical dimensions (11.00 mm height) and extended temperature range (-55°C to 105°C). However, this part is classified as Obsolete, limiting its suitability for new production designs. Ripple current performance at high frequency (180 mA @ 10 kHz) exceeds the original specification (90 mA @ 10 kHz).

For Upgraded Substitution (35 V Voltage Rating):

EEU-EB1V330S (Panasonic Electronic Components) is an Active product offering enhanced reliability with 5000-hour lifetime at 105°C (versus 2000 hours). The 35 V rating provides voltage margin for applications with transient overvoltage conditions. This part is suitable for new designs and long-term production support. Height of 12.00 mm requires board space verification.

EKZE350ELL330ME11D (Chemi-Con) is an Active product with superior ripple current handling (100 mA @ 120 Hz, 250 mA @ 100 kHz), making it suitable for high-ripple-current applications. The 2000-hour lifetime matches the original specification. Height of 12.50 mm is the maximum among substitute options.

UHE1V330MDD (Nichicon) offers 5000-hour lifetime at 105°C with high ripple current capability (115.5 mA @ 120 Hz, 210 mA @ 100 kHz). However, Obsolete status limits applicability to legacy system support only.

UPW1V330MDD (Nichicon) provides a compact 35 V option (11.00 mm height) with extended temperature range (-55°C to 105°C). Obsolete status restricts use to field replacement scenarios.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements. All parts carry EAR99 export classification and HTSUS code 8532.22.0020.

Frequently Asked Questions (FAQ)

Q1: Can SEK330M025ST replace SH330M025ST in all applications?

SEK330M025ST is a direct electrical equivalent with identical capacitance (33 µF), voltage rating (25 V), tolerance (±20%), and ESR (6.43 Ohm @ 120 Hz). The primary difference is increased height (13.00 mm versus 11.00 mm). Substitution is valid provided the circuit board layout accommodates the additional 2.00 mm height. SEK330M025ST is Active status, ensuring supply continuity.

Q2: What is the advantage of using 35 V rated capacitors instead of 25 V?

A 35 V rated capacitor in a 25 V application provides voltage safety margin, reducing stress on the dielectric and extending component lifetime. Higher voltage ratings do not affect circuit operation at 25 V. Upgraded substitutes (EEU-EB1V330S, EKZE350ELL330ME11D, UHE1V330MDD, UPW1V330MDD) are electrically compatible with 25 V circuits.

Q3: Which substitute part offers the best long-term availability?

EEU-EB1V330S (Panasonic) and EKZE350ELL330ME11D (Chemi-Con) are both classified as Active products, ensuring continued manufacturing and supply. SEK330M025ST (Cornell Dubilier) is also Active for 25 V applications. Obsolete-status parts (UPW1E330MDD, UHE1V330MDD, UPW1V330MDD) should be reserved for legacy system support.

Q4: Are physical dimensions identical across all substitute parts?

No. All parts share the same case diameter (5.00 mm) and lead spacing (2.00 mm), but heights vary: SH330M025ST (11.00 mm), SEK330M025ST (13.00 mm), UPW1E330MDD (11.00 mm), EEU-EB1V330S (12.00 mm), EKZE350ELL330ME11D (12.50 mm), UHE1V330MDD (11.00 mm), UPW1V330MDD (11.00 mm). Board layout verification is required before substitution.

Q5: What ripple current specifications should I consider for substitution?

The original SH330M025ST specifies 75 mA @ 120 Hz and 90 mA @ 10 kHz. All substitute parts meet or exceed these values. EKZE350ELL330ME11D and UHE1V330MDD offer significantly higher ripple current capability (100–115.5 mA @ 120 Hz, 210–250 mA @ 10 kHz), suitable for high-ripple applications. UPW1E330MDD and UPW1V330MDD provide 54 mA @ 120 Hz, which is below the original specification at low frequency.

Q6: Can I use UPW1E330MDD or UPW1V330MDD as substitutes?

UPW1E330MDD (25 V) and UPW1V330MDD (35 V) are electrically compatible but carry Obsolete status. Both parts have reduced ripple current at 120 Hz (54 mA versus 75 mA), which may be limiting in high-ripple applications. These parts are suitable only for field replacement of existing systems or legacy production support.

Q7: What is the difference between ESR and Impedance specifications?

ESR (Equivalent Series Resistance) is measured at a specific frequency (120 Hz for SH330M025ST at 6.43 Ohm). Impedance is a broader measure of total opposition to AC current flow. UPW1E330MDD lists 600 mOhms impedance; EKZE350ELL330ME11D lists 300 mOhms impedance. Lower impedance generally indicates better high-frequency performance. ESR data is not provided for most substitute parts, limiting direct comparison.

Q8: Which substitute part is best for new product designs?

For new designs requiring 25 V operation, SEK330M025ST (Active status, same manufacturer) is the optimal choice. For designs allowing 35 V operation, EEU-EB1V330S (Panasonic, 5000-hour lifetime, Active status) or EKZE350ELL330ME11D (Chemi-Con, high ripple current, Active status) are recommended based on specific ripple current and lifetime requirements.

Q9: Are all substitute parts RoHS3 compliant?

Yes. All substitute parts listed (SEK330M025ST, UPW1E330MDD, EEU-EB1V330S, EKZE350ELL330ME11D, UHE1V330MDD, UPW1V330MDD) are ROHS3 Compliant and REACH Unaffected, meeting current environmental regulations.

Q10: What is the lifetime difference between substitute parts?

SH330M025ST and most substitutes specify 2000 hours @ 105°C. EEU-EB1V330S and UHE1V330MDD offer extended 5000-hour lifetime @ 105°C, providing 2.5× longer operational life under thermal stress. Extended lifetime is beneficial for applications requiring high reliability or extended service intervals.

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