SEK2R2M050ST Equivalent & Substitute Parts

Part Overview

The SEK2R2M050ST is a 2.2 µF, 50 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, through-hole configuration. This component is classified as Active product status and is designed for general-purpose applications requiring stable capacitance and extended operational life at elevated temperatures.

Substitute parts become necessary when the primary manufacturer part experiences supply constraints, extended lead times, or when design flexibility permits selection from alternative manufacturers meeting identical electrical and mechanical specifications. The SEK2R2M050ST has documented substitute availability from Nichicon, providing equivalent functional performance within the same package and electrical parameters.

Substiute Parts

SEK2R2M050ST

Cornell Dubilier Electronics (CDE)In Stock: 1697SEK2R2M050ST Datasheet

Current PartRFQ

UPW1H2R2MDD

NichiconIn Stock: 19545UPW1H2R2MDD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SEK2R2M050ST is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Capacitance: 2.2 µF (exact match required)
• Voltage Rating: 50 V (minimum acceptable rating)
• Tolerance: ±20% (matching tolerance band)
• Operating Temperature Range: -55°C to 105°C (full range coverage)
• Lifetime @ Temperature: 2000 Hrs @ 105°C (minimum operational life specification)

Mechanical Equivalence Criteria:

• Mounting Type: Through Hole (PCB assembly method)
• Package / Case: Radial, Can (physical form factor)
• Lead Spacing: 0.079" (2.00 mm) (PCB footprint compatibility)
• Size / Dimension: 0.197" Dia (5.00 mm) (envelope constraint)
• Height - Seated (Max): Physical height clearance (board layout constraint)

Compliance Criteria:

• RoHS3 Compliance (regulatory requirement)
• REACH Unaffected status (material restriction compliance)

The substitute part UPW1H2R2MDD from Nichicon meets all electrical and mechanical equivalence criteria, with the exception of a reduced maximum seated height (0.433" versus 0.512"), which represents a design advantage for space-constrained applications.

Parameter Comparison

Engineering Selection Recommendations

SEK2R2M050ST (Cornell Dubilier Electronics)

Primary selection for applications where CDE component qualification is specified or preferred. Active product status ensures continued manufacturer support and availability. ROHS3 compliance and REACH unaffected status satisfy regulatory requirements for commercial and industrial applications.

UPW1H2R2MDD (Nichicon)

Direct electrical and mechanical substitute for SEK2R2M050ST. Nichicon component carries Obsolete product status, indicating discontinued manufacturing. Despite obsolete designation, substantial inventory (19,461 pcs) is currently available. ROHS3 compliance and REACH unaffected status maintain regulatory equivalence. Reduced maximum seated height (0.433" versus 0.512") provides layout advantage in space-constrained designs without compromising electrical performance.

Selection between these two parts should be based on:

• Manufacturer qualification requirements in design specifications
• PCB layout constraints (height clearance)
• Supply chain availability and lead time requirements
• Long-term component availability considerations (CDE active status versus Nichicon obsolete status)

Frequently Asked Questions (FAQ)

Q: Can UPW1H2R2MDD be used as a direct replacement for SEK2R2M050ST in existing designs?

A: Yes. Both components share identical electrical specifications (2.2 µF, 50 V, ±20% tolerance, 2000 Hrs @ 105°C) and mechanical compatibility (through-hole radial package, 0.079" lead spacing, 0.197" diameter). The UPW1H2R2MDD features a reduced maximum seated height (0.433" versus 0.512"), which is compatible with existing PCB layouts designed for the SEK2R2M050ST.

Q: What is the significance of the Obsolete product status for UPW1H2R2MDD?

A: Obsolete status indicates Nichicon has discontinued manufacturing of this part number. However, current inventory availability (19,461 pcs) permits component procurement for near-term production requirements. Long-term design programs should prioritize the active-status SEK2R2M050ST to ensure sustained supply chain access.

Q: Are there differences in ESR (Equivalent Series Resistance) between these parts?

A: The SEK2R2M050ST specifies ESR of 72.38 Ohm. The UPW1H2R2MDD does not provide ESR specification in the available data; however, it specifies impedance of 3 Ohms at 100 kHz. These parameters are measured under different conditions and cannot be directly compared. Both parts meet the 2000 Hrs @ 105°C lifetime requirement, indicating acceptable performance characteristics for general-purpose applications.

Q: Do both parts meet current regulatory compliance requirements?

A: Yes. Both SEK2R2M050ST and UPW1H2R2MDD are ROHS3 compliant and REACH unaffected, satisfying current regulatory requirements for commercial and industrial electronic equipment.

Q: What is the impact of the ±20% tolerance on circuit design?

A: The ±20% tolerance band permits capacitance variation between 1.76 µF and 2.64 µF. Circuit designs must accommodate this tolerance range. Both substitute parts share identical tolerance specifications, ensuring equivalent performance variation in production applications.

Q: Are there ripple current specifications that affect part selection?

A: The UPW1H2R2MDD specifies ripple current ratings (16.5 mA @ 120 Hz, 55 mA @ 100 kHz). The SEK2R2M050ST does not provide ripple current data in the available specifications. For applications requiring ripple current verification, the UPW1H2R2MDD specifications provide documented performance at standard test frequencies.