SH3R3M050ST Equivalent & Substitute Parts Reference

Part Overview

The SH3R3M050ST is a 3.3 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating discontinued production. 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 obsolete product status, equivalent and substitute parts from active manufacturers provide continued availability while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Capacitance	3.3	µF
Voltage - Rated	50	V
Tolerance	±20%	-
ESR @ 120Hz	48.25	Ohm
Lifetime @ 105°C	2000	Hrs
Operating Temperature Range	-40 to 105	°C
Lead Spacing	0.079 (2.00)	" (mm)
Diameter	0.197 (5.00)	" (mm)
Height - Seated (Max)	0.433 (11.00)	" (mm)
Mounting Type	Through Hole	-
Package / Case	Radial, Can	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the SH3R3M050ST is determined by the following critical parameters:

Primary Substitution Criteria:

Capacitance: 3.3 µF (exact match required)
Voltage Rating: 50 V minimum (equal or higher voltage rating acceptable)
Tolerance: ±20% (matching tolerance specification)
Mounting Type: Through Hole (mechanical compatibility)
Package: Radial, Can (physical form factor)
Lead Spacing: 0.079" (2.00mm) (PCB layout compatibility)
Polarization: Polar (electrical polarity requirement)

Secondary Compatibility Parameters:

Operating Temperature Range: -40°C to 105°C minimum
Lifetime @ 105°C: 2000 hours minimum
RoHS3 Compliance: Required for regulatory alignment

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents (50V Rating) Parts maintaining identical voltage rating, capacitance, and mechanical dimensions with active or equivalent product status.

Category 2: Upgraded Voltage Rating (100V Rating) Parts with increased voltage rating providing enhanced electrical margin while maintaining all other critical parameters. These are suitable for applications where higher voltage headroom is beneficial.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	ESR @ 120Hz (Ohm)	Lifetime @ 105°C (Hrs)	Temp Range (°C)	Height (mm)	Product Status	RoHS3
SH3R3M050ST	CDE	3.3	50	±20%	48.25	2000	-40 to 105	11.00	Obsolete	Compliant
SEK3R3M050ST	CDE	3.3	50	±20%	48.25	2000	-55 to 105	13.00	Active	Compliant
SEK3R3M100ST	CDE	3.3	100	±20%	40.21	2000	-55 to 105	13.00	Active	Compliant
UPW1H3R3MDD	Nichicon	3.3	50	±20%	-	2000	-55 to 105	11.00	Obsolete	Compliant
EEU-EB1H3R3S	Panasonic	3.3	50	±20%	-	5000	-40 to 105	12.00	Active	Compliant
EEU-EB1J3R3S	Panasonic	3.3	63	±20%	-	5000	-40 to 105	12.00	Active	Compliant
UPW2A3R3MDD	Nichicon	3.3	100	±20%	-	2000	-55 to 105	11.00	Obsolete	Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications):

SEK3R3M050ST (CDE) is the primary recommendation. This part maintains identical capacitance, voltage rating, and ESR characteristics while offering active product status ensuring long-term availability. Extended temperature range (-55°C to 105°C) provides additional operational margin. Height increase from 11.00mm to 13.00mm requires PCB layout verification.

For Enhanced Reliability (Extended Lifetime):

EEU-EB1H3R3S (Panasonic) provides 5000-hour lifetime at 105°C compared to 2000 hours in the original part, while maintaining 50V rating and identical capacitance. Active product status and ROHS3 compliance confirmed. Height of 12.00mm requires PCB clearance verification.

For Increased Voltage Margin:

SEK3R3M100ST (CDE) or UPW2A3R3MDD (Nichicon) provide 100V rating with 3.3µF capacitance. These are suitable for applications requiring higher voltage headroom. Both maintain ROHS3 compliance. Height increase to 13.00mm (SEK3R3M100ST) or 11.00mm (UPW2A3R3MDD) requires PCB layout assessment.

For Cross-Manufacturer Compatibility:

UPW1H3R3MDD (Nichicon) matches mechanical dimensions (11.00mm height) and electrical specifications of the original part. Obsolete status limits future availability.

Compliance Verification:

All substitute parts maintain ROHS3 compliance and are suitable for applications requiring regulatory alignment. REACH status is unaffected for all active alternatives.

Frequently Asked Questions (FAQ)

Q: Can SEK3R3M050ST directly replace SH3R3M050ST without PCB modification?

A: Electrical substitution is direct. Mechanical verification is required: SEK3R3M050ST height is 13.00mm versus 11.00mm for SH3R3M050ST. PCB clearance above the component must accommodate the additional 2.00mm height. Lead spacing remains identical at 0.079" (2.00mm).

Q: What is the advantage of EEU-EB1H3R3S over the original SH3R3M050ST?

A: EEU-EB1H3R3S provides 5000-hour lifetime at 105°C versus 2000 hours in SH3R3M050ST, representing 2.5x extended operational life. Electrical parameters (3.3µF, 50V, ±20% tolerance) remain identical. Active product status ensures continued availability. Height is 12.00mm, requiring 1.00mm additional clearance.

Q: Can I use a 100V-rated capacitor in place of the 50V original?

A: Yes. Higher voltage-rated capacitors (SEK3R3M100ST or UPW2A3R3MDD) are electrically compatible in 50V applications. This provides increased voltage margin and is acceptable for general-purpose circuits. Physical dimensions must be verified for PCB fit.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant, matching the original SH3R3M050ST compliance status. REACH status is unaffected for all active alternatives.

Q: What is the difference between SEK3R3M050ST and SEK3R3M100ST?

A: Both are CDE SEK series parts with identical 3.3µF capacitance and ±20% tolerance. SEK3R3M050ST is rated 50V with 2000-hour lifetime. SEK3R3M100ST is rated 100V with identical 2000-hour lifetime and lower ESR (40.21Ohm @ 120Hz versus 48.25Ohm). Both have 13.00mm height and active product status.

Q: Why is UPW1H3R3MDD listed as obsolete if it is a substitute?

A: UPW1H3R3MDD is included as a documented equivalent from the original part's substitute list. Obsolete status indicates discontinued production by Nichicon. Current inventory availability is 6030 pieces. For new designs, active alternatives (SEK3R3M050ST or EEU-EB1H3R3S) are recommended.

Q: What is the impact of different ESR values on circuit performance?

A: ESR affects ripple current handling and heat dissipation. SH3R3M050ST specifies 48.25Ohm @ 120Hz. SEK3R3M100ST provides lower ESR at 40.21Ohm @ 120Hz, improving ripple current performance. UPW1H3R3MDD and EEU-EB1H3R3S do not specify ESR but provide alternative ripple current ratings at different frequencies. Selection depends on circuit ripple current requirements.

Q: Can I use EEU-EB1J3R3S (63V) instead of 50V parts?

A: Yes. EEU-EB1J3R3S provides 63V rating with identical 3.3µF capacitance and extended 5000-hour lifetime. This is electrically compatible in 50V applications with increased voltage margin. Height is 12.00mm, requiring PCB clearance verification.

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