Nichicon UCS2E101MND9 Equivalent & Substitute Parts

Part Overview

The Nichicon UCS2E101MND9 is a 100 µF, 250 V aluminum electrolytic capacitor in radial, can package configuration. This component is rated for 10,000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand extended operational lifetime, when different physical dimensions are required for PCB layout constraints, or when alternative manufacturer sourcing is needed for supply chain resilience.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	250 V
Tolerance	±20%
Lifetime @ 105°C	10,000 Hrs
Operating Temperature Range	-40°C to 105°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.197" (5.00 mm)
Diameter	0.394" (10.00 mm)
Height	2.047" (52.00 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UCS2E101MND9 is determined by the following mandatory parameters:

Capacitance: Must be 100 µF
Voltage Rating: Must be 250 V
Tolerance: Must be ±20%
Polarization: Must be Polar
Mounting Type: Must be Through Hole
Package Type: Must be Radial, Can
Operating Temperature Range: Must support -40°C to 105°C minimum
RoHS Compliance: Must be ROHS3 Compliant

Substitute parts are grouped into two categories based on physical compatibility:

Category A - Direct Physical Compatibility (Same Lead Spacing 0.197" / 5.00 mm):

Nichicon UCY2E101MHD: Enhanced lifetime (12,000 hrs), different physical dimensions

Category B - Alternative Physical Dimensions (Lead Spacing 0.295" / 7.50 mm or larger):

Nichicon UPJ2E101MHD, UPM2E101MHD, UPW2E101MHD, UVY2E101MHD, UVZ2E101MHD
Chemi-Con EKMG251ELL101MLN3S, EKXG251ELL101ML25S
Cornell Dubilier Electronics SEK101M250ST

Parts in Category B require PCB layout verification due to different lead spacing and physical dimensions.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Lead Spacing	Diameter	Height	Product Status	RoHS
UCS2E101MND9	Nichicon	100 µF	250 V	±20%	10,000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	2.047" (52.00 mm)	Active	ROHS3
UCY2E101MHD	Nichicon	100 µF	250 V	±20%	12,000 Hrs	0.295" (7.50 mm)	0.630" (16.00 mm)	0.846" (21.50 mm)	Active	ROHS3
UPJ2E101MHD	Nichicon	100 µF	250 V	±20%	5,000 Hrs	0.295" (7.50 mm)	0.709" (18.00 mm)	1.634" (41.50 mm)	Obsolete	ROHS3
UPM2E101MHD	Nichicon	100 µF	250 V	±20%	5,000 Hrs	0.295" (7.50 mm)	0.709" (18.00 mm)	1.654" (42.00 mm)	Obsolete	ROHS3
UPW2E101MHD	Nichicon	100 µF	250 V	±20%	8,000 Hrs	0.295" (7.50 mm)	0.709" (18.00 mm)	1.398" (35.50 mm)	Obsolete	ROHS3
UPW2E101MRD6	Nichicon	100 µF	250 V	±20%	8,000 Hrs	0.394" (10.00 mm)	0.787" (20.00 mm)	1.220" (31.00 mm)	Obsolete	ROHS3
UVY2E101MHD	Nichicon	100 µF	250 V	±20%	2,000 Hrs	0.295" (7.50 mm)	0.630" (16.00 mm)	1.063" (27.00 mm)	Not For New Designs	ROHS3
UVZ2E101MHD	Nichicon	100 µF	250 V	±20%	2,000 Hrs	0.295" (7.50 mm)	0.630" (16.00 mm)	1.299" (33.00 mm)	Not For New Designs	ROHS3
EKMG251ELL101MLN3S	Chemi-Con	100 µF	250 V	±20%	2,000 Hrs	0.295" (7.50 mm)	0.630" (16.00 mm)	1.299" (33.00 mm)	Active	ROHS3
EKXG251ELL101ML25S	Chemi-Con	100 µF	250 V	±20%	10,000 Hrs	0.295" (7.50 mm)	0.630" (16.00 mm)	0.984" (25.00 mm)	Active	ROHS3
SEK101M250ST	Cornell Dubilier Electronics	100 µF	250 V	±20%	2,000 Hrs	0.295" (7.50 mm)	0.630" (16.00 mm)	1.260" (32.00 mm)	Active	ROHS3

Engineering Selection Recommendations

For Direct PCB Compatibility (No Layout Modification Required):

The Nichicon UCY2E101MHD maintains the same lead spacing (0.197" / 5.00 mm) as the UCS2E101MND9 and offers improved lifetime specification (12,000 hours versus 10,000 hours at 105°C). This part is currently active in production and ROHS3 compliant. Physical dimensions differ, requiring verification that the larger diameter (0.630" vs 0.394") and reduced height (0.846" vs 2.047") accommodate the available PCB space.

For Extended Lifetime with Layout Modification:

The Chemi-Con EKXG251ELL101ML25S provides 10,000-hour lifetime at 105°C with active product status and ROHS3 compliance. This part requires PCB layout modification due to 0.295" (7.50 mm) lead spacing. The compact height (0.984") offers space advantages in constrained designs.

For Active Production with Standard Lifetime:

The Chemi-Con EKMG251ELL101MLN3S and Cornell Dubilier Electronics SEK101M250ST are both active products with ROHS3 compliance. Both specify 2,000-hour lifetime at 105°C and require 0.295" (7.50 mm) lead spacing accommodation.

Parts Not Recommended for New Designs:

Nichicon UVY2E101MHD and UVZ2E101MHD carry "Not For New Designs" status and specify only 2,000-hour lifetime. Nichicon UPJ2E101MHD, UPM2E101MHD, and UPW2E101MHD are obsolete with reduced lifetime specifications (5,000 or 8,000 hours).

Frequently Asked Questions (FAQ)

Q: Can I use UCY2E101MHD as a direct replacement without PCB modification?

A: The UCY2E101MHD maintains the same lead spacing (5.00 mm) but has different physical dimensions. While lead spacing compatibility eliminates hole repositioning, the larger diameter (16.00 mm vs 10.00 mm) and significantly reduced height (21.50 mm vs 52.00 mm) require verification that the component fits within available PCB space and clearance requirements.

Q: What is the difference between parts with 0.197" and 0.295" lead spacing?

A: Lead spacing determines the distance between the two radial leads on the PCB. The 0.197" (5.00 mm) spacing is used by UCS2E101MND9 and UCY2E101MHD. The 0.295" (7.50 mm) spacing is used by most other substitutes. Changing lead spacing requires PCB layout modification and hole repositioning.

Q: Why do some substitutes have lower lifetime ratings?

A: Lifetime at 105°C is a design parameter that varies by series. The UCS2E101MND9 specifies 10,000 hours. Substitutes with 2,000 or 5,000-hour ratings represent different product series with different thermal performance characteristics. Selection depends on application requirements for operational lifetime under elevated temperature conditions.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All parts listed meet ROHS3 compliance requirements. This ensures compatibility with environmental and regulatory standards for electronic component manufacturing and use.

Q: Can I substitute a part marked "Not For New Designs"?

A: Parts marked "Not For New Designs" (UVY2E101MHD, UVZ2E101MHD) are available for existing designs but should not be selected for new product development. These parts may have limited future availability or represent older technology generations.

Q: What is the significance of the Nichicon UPM2E101MHD having AEC-Q200 rating?

A: AEC-Q200 is an automotive qualification standard. The UPM2E101MHD is rated for automotive applications, indicating it meets automotive industry reliability and performance standards. This part is obsolete and not recommended for new designs.

Q: How do I determine which substitute is best for my application?

A: Evaluate based on: (1) PCB layout constraints—verify lead spacing and physical dimensions fit available space; (2) lifetime requirements—select parts with sufficient hours at 105°C for your application; (3) product status—prefer active parts over obsolete or "Not For New Designs" status; (4) manufacturer availability—confirm inventory and supply chain stability.

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