ECO-S2GP121CA Equivalent & Substitute Parts

Part Overview

The ECO-S2GP121CA is a 120 µF, 400 V aluminum electrolytic capacitor manufactured by Panasonic Electronic Components in the TS-UP series. This radial, can-style snap-in capacitor is designed for general-purpose applications with a rated lifetime of 3000 hours at 85°C. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible specifications.

Key Parameters

Parameter	Value
Capacitance	120 µF
Voltage Rating	400 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Polarization	Polar
Operating Temperature Range	-25°C to 85°C
Lifetime @ Temperature	3000 Hrs @ 85°C

Substitute Part Grouping Explanation

Substitution for the ECO-S2GP121CA is determined by the following critical parameters:

Capacitance Value: 120 µF (exact match required)
Voltage Rating: 400 V minimum (higher voltage ratings are acceptable upgrades)
Package Type: Radial, Can - Snap-In (mechanical and electrical interface compatibility)
Lead Spacing: 0.394" (10.00 mm) (PCB footprint compatibility)
Polarization: Polar (electrical polarity requirement)
Mounting Type: Through Hole (assembly process compatibility)

Substitute parts are categorized as follows:

Direct Substitutes maintain identical voltage ratings (400 V) and thermal specifications (3000 Hrs @ 85°C), ensuring drop-in compatibility without design modification.

Upgrade Substitutes feature higher voltage ratings (420 V or 450 V) and/or extended operating temperature ranges (-25°C to 105°C), providing enhanced performance margins while maintaining mechanical and electrical compatibility.

Similar Substitutes from alternative manufacturers meet core electrical specifications but may have minor dimensional variations or different thermal ratings, requiring verification of physical fit and thermal performance in the application.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp.	Operating Temp. Range	Product Status	Lead Spacing	Height (Max)
ECO-S2GP121CA	Panasonic	120 µF	400 V	±20%	3000 Hrs @ 85°C	-25°C ~ 85°C	Obsolete	0.394" (10.00 mm)	1.181" (30.00 mm)
LLS2G121MELA	Nichicon	120 µF	400 V	±20%	3000 Hrs @ 85°C	-25°C ~ 85°C	Active	0.394" (10.00 mm)	0.984" (25.00 mm)
LGU2W121MELA	Nichicon	120 µF	450 V	±20%	3000 Hrs @ 105°C	-25°C ~ 105°C	Active	0.394" (10.00 mm)	1.181" (30.00 mm)
LGUW6121MELA	Nichicon	120 µF	420 V	±20%	3000 Hrs @ 105°C	-25°C ~ 105°C	Active	0.394" (10.00 mm)	1.181" (30.00 mm)
LGW2W121MELA30	Nichicon	120 µF	450 V	±20%	3000 Hrs @ 105°C	-25°C ~ 105°C	Active	0.394" (10.00 mm)	1.181" (30.00 mm)
LLS2W121MELA	Nichicon	120 µF	450 V	±20%	3000 Hrs @ 85°C	-25°C ~ 85°C	Active	0.394" (10.00 mm)	1.181" (30.00 mm)
380LX121M400H032	Cornell Dubilier Electronics	120 µF	400 V	±20%	3000 Hrs @ 85°C	-25°C ~ 85°C	Active	0.394" (10.00 mm)	1.457" (37.00 mm)
LPX121M400C1P3	Cornell Dubilier Electronics	120 µF	400 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	Active	0.394" (10.00 mm)	0.984" (25.00 mm)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications)

LLS2G121MELA from Nichicon provides the closest direct substitute with matching 400 V voltage rating and 3000 Hrs @ 85°C lifetime. This part is ROHS3 compliant and currently in active production status. Physical height is reduced to 0.984" compared to the original 1.181", which may require PCB layout verification for clearance.

For Enhanced Performance (Voltage and Temperature Upgrade)

LGUW6121MELA and LGU2W121MELA offer higher voltage ratings (420 V and 450 V respectively) with extended operating temperature range to 105°C and 3000 Hrs @ 105°C lifetime. These upgrades provide improved thermal margin and voltage headroom. Both maintain identical lead spacing and are ROHS3 compliant with active product status.

LGW2W121MELA30 and LLS2W121MELA provide 450 V voltage rating with identical mechanical dimensions to the original part (1.181" height). LGW2W121MELA30 offers extended temperature range to 105°C, while LLS2W121MELA maintains the 85°C thermal specification.

For Alternative Manufacturer Selection

380LX121M400H032 from Cornell Dubilier Electronics matches the original 400 V specification and 3000 Hrs @ 85°C lifetime with ROHS3 compliance. Physical height is increased to 1.457", requiring PCB layout verification.

LPX121M400C1P3 from Cornell Dubilier Electronics provides a compact alternative (0.984" height) but features reduced lifetime rating of 1000 Hrs @ 85°C and extended operating temperature range to -40°C. This part is suitable only for applications where the reduced thermal lifetime is acceptable.

Frequently Asked Questions (FAQ)

Q: Can I use a higher voltage-rated capacitor as a substitute?

A: Yes. Higher voltage ratings (420 V or 450 V) are acceptable substitutes for the 400 V original part. The capacitor will operate safely at lower voltages than its rating. Verify that the physical dimensions fit the PCB layout, as some higher-voltage variants have different heights.

Q: What is the significance of the lead spacing specification?

A: Lead spacing of 0.394" (10.00 mm) determines PCB footprint compatibility. All listed substitutes maintain this spacing, ensuring mechanical fit without PCB modification. Verify actual PCB hole pattern before selection.

Q: Are there dimensional differences I should consider?

A: Yes. The original ECO-S2GP121CA has a height of 1.181" (30.00 mm). Direct substitute LLS2G121MELA is shorter at 0.984" (25.00 mm), while Cornell Dubilier 380LX121M400H032 is taller at 1.457" (37.00 mm). Verify clearance in your application before substitution.

Q: What does "ROHS3 Compliant" mean for my application?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. All active substitute parts listed are ROHS3 compliant, meeting current environmental and regulatory standards.

Q: Can I substitute a part with a lower lifetime rating?

A: The LPX121M400C1P3 has a reduced lifetime of 1000 Hrs @ 85°C compared to the original 3000 Hrs @ 85°C. This substitution is acceptable only if your application does not require the full 3000-hour thermal life. Verify application requirements before selection.

Q: What is the difference between "Direct," "Upgrade," and "Similar" substitutes?

A: Direct substitutes maintain identical electrical and thermal specifications for drop-in replacement. Upgrade substitutes offer higher voltage ratings or extended temperature ranges for enhanced performance. Similar substitutes from alternative manufacturers meet core specifications but may have dimensional or thermal variations requiring verification.

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