SH3R3M250ST Equivalent & Substitute Parts Reference

Part Overview

The SH3R3M250ST is a 3.3 µF, 250 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part serves general-purpose applications requiring polar capacitive storage at 250 V rated voltage with radial lead configuration and through-hole mounting.

Substiute Parts

SH3R3M250ST

Cornell Dubilier Electronics (CDE)In Stock: 865SH3R3M250ST Datasheet

Current PartRFQ

UPW2E3R3MPD

NichiconIn Stock: 3007UPW2E3R3MPD Datasheet

UpgradeRFQ

335CKE400M

Cornell Dubilier / Illinois CapacitorIn Stock: 1244335CKE400M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SH3R3M250ST are classified based on the following substitution criteria:

Direct Equivalent (Upgrade): UPW2E3R3MPD This part maintains all critical electrical and mechanical parameters: 3.3 µF capacitance, ±20% tolerance, 250 V rated voltage, polar configuration, radial can package, 0.197" (5.00mm) lead spacing, 0.394" (10.00mm) diameter, and through-hole mounting. The primary distinction is extended lifetime (5000 Hrs @ 105°C versus 2000 Hrs @ 105°C) and wider operating temperature range (-40°C ~ 105°C versus -25°C ~ 105°C).

Similar Part (Voltage Upgrade): 335CKE400M This part shares identical capacitance (3.3 µF), tolerance (±20%), package configuration (radial can), lead spacing (0.197" / 5.00mm), diameter (0.394" / 10.00mm), and mounting type (through-hole). The rated voltage is 400 V instead of 250 V, resulting in increased physical height (0.551" / 14.00mm versus 0.472" / 12.00mm) and higher ESR (100.477 Ohm @ 120Hz versus 60.29 Ohm @ 120Hz). This part is active status and suitable for applications requiring higher voltage margin.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Voltage Rating): The UPW2E3R3MPD from Nichicon is the appropriate direct equivalent. Both parts maintain 250 V rated voltage, identical capacitance and tolerance, and compatible mechanical dimensions with lead spacing of 0.197" (5.00mm). The UPW2E3R3MPD offers extended operational lifetime (5000 Hrs @ 105°C) and broader temperature range (-40°C ~ 105°C), providing improved reliability margins. Both parts are ROHS3 compliant and classified as obsolete, indicating mature product lines suitable for legacy system support.

For Voltage Margin Applications: The 335CKE400M provides a 400 V rated voltage option while maintaining the same 3.3 µF capacitance and ±20% tolerance. This part is active status, ensuring continued availability. The increased height (0.551" / 14.00mm) must be verified against PCB layout constraints. The higher ESR (100.477 Ohm @ 120Hz) should be evaluated for ripple current and thermal performance in the target application. This part is suitable when circuit design permits higher voltage rating and increased physical height.

Compliance Considerations: All three parts are ROHS3 compliant and carry EAR99 ECCN classification. The UPW2E3R3MPD includes REACH Unaffected status, while 335CKE400M includes REACH Unaffected status, providing regulatory alignment for international applications.

Frequently Asked Questions (FAQ)

Q: Can UPW2E3R3MPD be used as a direct drop-in replacement for SH3R3M250ST?

A: Yes. The UPW2E3R3MPD maintains identical electrical specifications (3.3 µF, ±20%, 250 V) and mechanical compatibility (lead spacing 0.197" / 5.00mm, diameter 0.394" / 10.00mm, through-hole mounting). The height difference is minimal (0.492" / 12.50mm versus 0.472" / 12.00mm), and the extended lifetime and wider temperature range provide performance improvements.

Q: What is the primary difference between UPW2E3R3MPD and SH3R3M250ST?

A: The UPW2E3R3MPD offers extended lifetime (5000 Hrs @ 105°C versus 2000 Hrs) and wider operating temperature range (-40°C ~ 105°C versus -25°C ~ 105°C). Both parts are obsolete and share identical voltage, capacitance, tolerance, and package specifications.

Q: When should 335CKE400M be selected instead of UPW2E3R3MPD?

A: The 335CKE400M should be selected when the circuit design requires or benefits from 400 V rated voltage instead of 250 V. This part is active status, ensuring long-term availability. The increased physical height (0.551" / 14.00mm) must be accommodated in the PCB layout. The higher ESR may impact thermal performance in high-ripple-current applications.

Q: Are all three parts PCB layout compatible?

A: Lead spacing and diameter are identical (0.197" / 5.00mm and 0.394" / 10.00mm respectively). Height differences exist: SH3R3M250ST (0.472" / 12.00mm), UPW2E3R3MPD (0.492" / 12.50mm), and 335CKE400M (0.551" / 14.00mm). PCB clearance above the component must be verified for the selected substitute.

Q: What is the significance of ESR differences between these parts?

A: ESR (Equivalent Series Resistance) affects ripple current handling and thermal performance. SH3R3M250ST specifies 60.29 Ohm @ 120Hz, while 335CKE400M specifies 100.477 Ohm @ 120Hz. Higher ESR increases heat generation under ripple current conditions. UPW2E3R3MPD does not specify ESR in the provided data. Applications with high ripple current should prioritize lower ESR values.

Q: Are these parts suitable for new designs or legacy system support only?

A: SH3R3M250ST and UPW2E3R3MPD are both obsolete, making them suitable for legacy system support and replacement applications. The 335CKE400M is active status, making it the appropriate choice for new designs requiring 3.3 µF, 400 V aluminum electrolytic capacitors in radial can package.

Q: Do all parts meet RoHS compliance requirements?

A: Yes. All three parts are ROHS3 compliant. The UPW2E3R3MPD and 335CKE400M include REACH Unaffected status, providing regulatory alignment for international markets.