Equivalent & Substitute Parts for SEK3R3M100ST

Part Overview

The SEK3R3M100ST is a 3.3 µF, 100 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as Active product status and is designed for general-purpose applications requiring polar electrolytic capacitance in through-hole mounting configurations.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory depletion, or when alternative sourcing is required for supply chain continuity. The substitute parts listed maintain electrical equivalence within the specified parameter tolerances while potentially offering different packaging or lead configurations.

Substiute Parts

SEK3R3M100ST

Cornell Dubilier Electronics (CDE)In Stock: 928SEK3R3M100ST Datasheet

Current PartRFQ

UPJ2A3R3MDD1TD

NichiconIn Stock: 3065UPJ2A3R3MDD1TD Datasheet

DirectRFQ

UPW2A3R3MDD

NichiconIn Stock: 5631UPW2A3R3MDD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SEK3R3M100ST is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance: 3.3 µF (exact match required)
• Voltage Rating: 100 V (exact match required)
• Tolerance: ±20% (exact match required)
• Operating Temperature Range: -55°C to 105°C (exact match or superior range required)
• Lifetime @ 105°C: 2000 Hrs (exact match or longer required)
• Polarization: Polar (exact match required)

Mechanical Equivalence Requirements:

• Mounting Type: Through Hole (exact match required)
• Package Type: Radial, Can (exact match required)
• Diameter: 0.197" (5.00mm) (exact match required)

Physical Accommodation Parameters:

• Lead Spacing: 0.079" (2.00mm) preferred for direct PCB compatibility
• Height (Seated Max): 0.512" (13.00mm) preferred for space constraints

Regulatory Compliance:

• RoHS3 Compliant status required

The substitute parts UPJ2A3R3MDD1TD and UPW2A3R3MDD, both manufactured by Nichicon, meet all critical electrical and mechanical equivalence requirements. Variations in lead spacing and height represent secondary considerations dependent on specific PCB layout and enclosure constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: SEK3R3M100ST (CDE)

The SEK3R3M100ST maintains Active product status, indicating ongoing manufacturer support and availability. This part is the preferred choice for new designs and applications where supply continuity is required. The component is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Secondary Selection: UPW2A3R3MDD (Nichicon)

The UPW2A3R3MDD is electrically equivalent to the primary part and maintains identical lead spacing (0.079" / 2.00mm), enabling direct PCB compatibility without layout modifications. This substitute is ROHS3 compliant. The reduced height (0.433" vs. 0.512") provides advantage in space-constrained applications. Product status is Obsolete; inventory availability is 5621 pieces.

Tertiary Selection: UPJ2A3R3MDD1TD (Nichicon)

The UPJ2A3R3MDD1TD is electrically equivalent to the primary part and is ROHS3 compliant. This substitute features a reduced height (0.472" vs. 0.512") compared to the primary part. Lead spacing differs at 0.098" (2.50mm) versus 0.079" (2.00mm), requiring PCB layout verification before implementation. Product status is Obsolete; inventory availability is 3044 pieces.

Selection between substitute parts depends on PCB layout constraints and lead spacing requirements. Both substitutes satisfy all critical electrical and mechanical equivalence parameters.

Frequently Asked Questions (FAQ)

Q: Can UPJ2A3R3MDD1TD be used as a direct replacement for SEK3R3M100ST without PCB modification?

A: UPJ2A3R3MDD1TD differs in lead spacing (0.098" vs. 0.079"). Direct PCB compatibility requires verification of pad spacing. If the PCB is designed for 0.079" lead spacing, the 0.098" spacing of UPJ2A3R3MDD1TD will not align with existing pads without layout modification.

Q: Can UPW2A3R3MDD be used as a direct replacement for SEK3R3M100ST without PCB modification?

A: Yes. UPW2A3R3MDD maintains identical lead spacing (0.079" / 2.00mm) and diameter (0.197" / 5.00mm) as the primary part. The reduced height (0.433" vs. 0.512") is compatible with applications designed for the primary part's maximum height.

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

A: Obsolete status indicates that Nichicon has discontinued active manufacturing and support for UPJ2A3R3MDD1TD and UPW2A3R3MDD. These parts are available only from existing inventory. For long-term supply requirements, the Active status SEK3R3M100ST is the recommended choice.

Q: Are all three parts RoHS3 compliant?

A: Yes. SEK3R3M100ST, UPJ2A3R3MDD1TD, and UPW2A3R3MDD are all ROHS3 compliant and REACH unaffected.

Q: What are the key electrical parameters that must match for substitution?

A: Capacitance (3.3 µF), voltage rating (100 V), tolerance (±20%), operating temperature range (-55°C to 105°C), and lifetime at 105°C (2000 Hrs) must match exactly. All three parts meet these requirements.

Q: How do the ripple current ratings differ between the parts?

A: Ripple current specifications are provided for the primary part (29 mA @ 120 Hz, 40.6 mA @ 10 kHz) and substitute parts (UPJ2A3R3MDD1TD: 27 mA @ 120 Hz, 54 mA @ 10 kHz; UPW2A3R3MDD: 17.4 mA @ 120 Hz, 58 mA @ 100 kHz). These variations reflect different internal construction but do not affect substitution eligibility within the specified electrical equivalence parameters.

Q: What packaging formats are available for these parts?

A: SEK3R3M100ST is available in standard packaging. UPJ2A3R3MDD1TD is supplied in Cut Tape (CT) format. UPW2A3R3MDD is supplied in Bulk format. Packaging selection depends on procurement and assembly requirements.