ECO-S2GP121CX Equivalent & Substitute Parts

Part Overview

The ECO-S2GP121CX 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
Lead Spacing	0.394" (10.00 mm)
Mounting Type	Through Hole
Operating Temperature Range	-25°C to 85°C
Lifetime Rating	3000 Hrs @ 85°C
Polarization	Polar
Application	General Purpose

Substitute Part Grouping Explanation

Substitution for the ECO-S2GP121CX is determined by strict adherence to the following electrical and mechanical parameters:

Core Substitution Criteria:

Capacitance: 120 µF (exact match required)
Voltage Rating: 400 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Substitute Categories:

Direct Manufacturer Equivalent: Parts meeting all core criteria with identical or compatible physical dimensions and electrical performance at the same temperature rating.

Upgrade Parts: Parts meeting all core criteria with enhanced temperature ratings (105°C vs. 85°C) or improved ripple current handling, maintaining identical physical footprint and lead spacing.

Parametric Equivalent: Parts meeting all core criteria with identical electrical specifications and physical dimensions, differing only in manufacturer or series designation.

Similar Parts: Parts meeting core electrical criteria with minor dimensional variations (can diameter or height) that may require mechanical evaluation for board-level compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Can Diameter	Height (Max)	Lead Spacing	Lifetime @ Temp	Operating Temp Range	Product Status
ECO-S2GP121CX	Panasonic	TS-UP	120 µF	400 V	±20%	0.984" (25.00 mm)	0.984" (25.00 mm)	0.394" (10.00 mm)	3000 Hrs @ 85°C	-25°C to 85°C	Obsolete
400USG120MEFCSN22X25	Rubycon	USG	120 µF	400 V	±20%	0.866" (22.00 mm)	1.063" (27.00 mm)	0.394" (10.00 mm)	3000 Hrs @ 85°C	-25°C to 85°C	Active
LGU2G121MELA	Nichicon	LGU	120 µF	400 V	±20%	0.984" (25.00 mm)	0.984" (25.00 mm)	0.394" (10.00 mm)	3000 Hrs @ 105°C	-25°C to 105°C	Active
LGW2G121MELA25	Nichicon	LGW	120 µF	400 V	±20%	0.984" (25.00 mm)	0.984" (25.00 mm)	0.394" (10.00 mm)	3000 Hrs @ 105°C	-25°C to 105°C	Active
380LX121M400H032	Cornell Dubilier Electronics (CDE)	380LX	120 µF	400 V	±20%	0.866" (22.00 mm)	1.457" (37.00 mm)	0.394" (10.00 mm)	3000 Hrs @ 85°C	-25°C to 85°C	Active
LLS2G121MELA	Nichicon	LLS	120 µF	400 V	±20%	0.984" (25.00 mm)	0.984" (25.00 mm)	0.394" (10.00 mm)	3000 Hrs @ 85°C	-25°C to 85°C	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Footprint and Performance):

LLS2G121MELA (Nichicon LLS series) provides parametric equivalence to the ECO-S2GP121CX with identical physical dimensions (0.984" diameter, 0.984" height), lead spacing, and electrical specifications. This part is RoHS3 compliant and currently in active production with 1214 units in stock.

For Enhanced Temperature Performance:

LGU2G121MELA and LGW2G121MELA25 (Nichicon LGU and LGW series) maintain identical physical footprint and lead spacing while extending the operating temperature range to 105°C and lifetime rating to 3000 hours at 105°C. Both parts are RoHS3 compliant and in active production. LGU2G121MELA offers 9655 units in stock; LGW2G121MELA25 offers 619 units.

For Dimensional Variation Tolerance:

400USG120MEFCSN22X25 (Rubycon USG series) and 380LX121M400H032 (Cornell Dubilier 380LX series) meet all electrical criteria with reduced can diameter (0.866" vs. 0.984") but increased height. These parts require mechanical evaluation to confirm board-level compatibility. Both are RoHS3 compliant and in active production.

Compliance Considerations:

All substitute parts listed are RoHS3 compliant except the main part (ECO-S2GP121CX), which carries REACH Affected status. All substitute parts carry REACH Unaffected status. All parts share identical ECCN (EAR99) and HTSUS (8532.22.0040) classifications.

Frequently Asked Questions (FAQ)

Q: Can I use LGU2G121MELA or LGW2G121MELA25 as direct replacements for ECO-S2GP121CX?

A: Yes. Both parts maintain identical physical dimensions (0.984" diameter, 0.984" height), lead spacing (0.394"), and electrical specifications (120 µF, 400 V, ±20% tolerance). The enhanced temperature rating (105°C vs. 85°C) provides improved performance margin without affecting compatibility.

Q: What is the difference between LGU2G121MELA and LGW2G121MELA25?

A: Both are Nichicon parts with identical capacitance, voltage, tolerance, physical dimensions, and lead spacing. The primary difference is ripple current handling: LGW2G121MELA25 provides higher ripple current capacity (1.22 A @ 120 Hz and 1.7446 A @ 50 kHz) compared to LGU2G121MELA (750 mA @ 120 Hz and 1.0725 A @ 50 kHz). Selection depends on application ripple current requirements.

Q: Can I use 400USG120MEFCSN22X25 or 380LX121M400H032 as replacements?

A: These parts meet all electrical criteria but have different physical dimensions. The can diameter is reduced to 0.866" (vs. 0.984"), and heights differ (1.063" and 1.457" respectively vs. 0.984"). Board-level mechanical compatibility must be verified before use.

Q: What is the difference between parametric equivalent and direct equivalent?

A: A parametric equivalent meets all electrical and mechanical specifications but may differ in manufacturer or series. A direct equivalent typically refers to parts with identical or near-identical performance characteristics from the same or compatible product line. LLS2G121MELA is a parametric equivalent; LGU2G121MELA and LGW2G121MELA25 are upgrade equivalents with enhanced temperature performance.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed are RoHS3 compliant. The original ECO-S2GP121CX does not carry RoHS3 compliance designation.

Q: What inventory levels are available for each substitute?

A: LGU2G121MELA: 9655 units; LLS2G121MELA: 1214 units; 400USG120MEFCSN22X25: 776 units; LGW2G121MELA25: 619 units; 380LX121M400H032: 997 units.

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