Equivalent & Substitute Parts for ECO-S2EP221BX

Part Overview

The Panasonic ECO-S2EP221BX is a 220 µF, 250 V aluminum electrolytic capacitor in radial, can snap-in package format. This component is classified as obsolete, making identification of suitable equivalent and substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -40°C to 85°C with a 3000-hour lifetime rating at 85°C, serving general-purpose applications requiring stable capacitance and low equivalent series resistance.

Key Parameters

Parameter	Value
Capacitance	220 µF
Tolerance	±20%
Voltage - Rated	250 V
ESR (Equivalent Series Resistance)	754 mOhm @ 120 Hz
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	0.866" Dia (22.00 mm)
Height - Seated (Max)	0.984" (25.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility for the ECO-S2EP221BX is determined by strict adherence to the following parameters:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 220 µF
Tolerance: ±20%
Voltage Rating: 250 V
Polarization: Polar

Mechanical Parameters (Non-Negotiable):

Lead Spacing: 0.394" (10.00 mm)
Package Type: Radial, Can - Snap-In
Mounting Type: Through Hole

Performance Parameters (Allowable Variation):

ESR: Equivalent or lower values acceptable
Lifetime @ Temperature: Equal or extended ratings acceptable
Operating Temperature Range: Must support minimum -40°C to 85°C; extended upper range acceptable
Ripple Current: Equal or higher values acceptable

Substitute parts are categorized as follows:

Direct Manufacturer Substitutes: Parts meeting all core electrical and mechanical parameters with equivalent or superior performance characteristics.

Upgrade Substitutes: Parts meeting all core parameters with extended temperature operating range (to 105°C) or improved lifetime ratings, providing enhanced reliability for demanding applications.

Parametric Equivalents: Parts meeting all core parameters with comparable ESR and ripple current performance, suitable for general-purpose replacement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	ESR @ Frequency	Lifetime @ Temp	Operating Temp Range	Size Dia (mm)	Height (mm)	Product Status
ECO-S2EP221BX	Panasonic	220 µF	250 V	754 mOhm @ 120 Hz	3000 Hrs @ 85°C	-40°C ~ 85°C	22.00	25.00	Obsolete
250USG220MEFCSN20X25	Rubycon	220 µF	250 V	Not Specified	3000 Hrs @ 85°C	-40°C ~ 85°C	20.00	27.00	Active
B43501C2227M	EPCOS - TDK Electronics	220 µF	250 V	450 mOhm @ 100 Hz	10000 Hrs @ 85°C	-40°C ~ 85°C	22.00	32.00	Active
381LR221M250H012	Cornell Dubilier Electronics (CDE)	220 µF	250 V	Not Specified	3000 Hrs @ 105°C	-40°C ~ 105°C	22.00	25.00	Active
LGU2E221MELZ	Nichicon	220 µF	250 V	Not Specified	3000 Hrs @ 105°C	-40°C ~ 105°C	22.00	25.00	Active
227LBB250M2BC	Cornell Dubilier / Illinois Capacitor	220 µF	250 V	754.67 mOhm @ 120 Hz	3000 Hrs @ 85°C	-40°C ~ 85°C	22.00	25.00	Active
LLS2E221MELZ	Nichicon	220 µF	250 V	Not Specified	3000 Hrs @ 85°C	-40°C ~ 85°C	22.00	25.00	Active
SLPX221M250A1P3	Cornell Dubilier Electronics (CDE)	220 µF	250 V	905 mOhm @ 120 Hz	3000 Hrs @ 85°C	-40°C ~ 85°C	22.00	25.00	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select 227LBB250M2BC (Cornell Dubilier / Illinois Capacitor) or LLS2E221MELZ (Nichicon). Both parts maintain the original 22.00 mm diameter and 25.00 mm height, matching the ECO-S2EP221BX footprint precisely. Both are RoHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability.

For Enhanced Reliability (Extended Temperature Range): Select 381LR221M250H012 (Cornell Dubilier Electronics) or LGU2E221MELZ (Nichicon). These upgrade substitutes extend the operating temperature range to -40°C ~ 105°C and maintain 3000-hour lifetime at the elevated 105°C rating. Both preserve the original 22.00 mm diameter and 25.00 mm height. Both are RoHS3 compliant with active product status.

For Superior Performance (Extended Lifetime): Select B43501C2227M (EPCOS - TDK Electronics). This part delivers a 10000-hour lifetime at 85°C—more than triple the original specification—with lower ESR (450 mOhm @ 100 Hz). The 22.00 mm diameter matches the original, though height increases to 32.00 mm. RoHS3 compliant with active product status.

For Cost-Effective Substitution (Equivalent Performance): Select 250USG220MEFCSN20X25 (Rubycon). This direct substitute maintains all core electrical parameters with equivalent performance. The 20.00 mm diameter is slightly smaller, and height increases to 27.00 mm. RoHS3 compliant with active product status.

All recommended substitutes are RoHS3 compliant and carry active product status, ensuring regulatory compliance and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different physical size? A: Physical dimensions must remain compatible with the PCB layout and mechanical constraints. The original ECO-S2EP221BX measures 22.00 mm diameter by 25.00 mm height. The Rubycon 250USG220MEFCSN20X25 (20.00 mm diameter, 27.00 mm height) and EPCOS B43501C2227M (22.00 mm diameter, 32.00 mm height) require layout verification. The Cornell Dubilier 381LR221M250H012 and Nichicon LGU2E221MELZ maintain identical dimensions and are direct mechanical replacements.

Q: What is the significance of ESR (Equivalent Series Resistance)? A: ESR affects ripple current handling and heat dissipation. The original part specifies 754 mOhm @ 120 Hz. Lower ESR values (such as the EPCOS B43501C2227M at 450 mOhm @ 100 Hz) indicate superior performance and reduced thermal stress. Higher ESR values (such as the Cornell Dubilier SLPX221M250A1P3 at 905 mOhm @ 120 Hz) remain acceptable for general-purpose applications but generate more heat.

Q: Why do some substitute parts have extended temperature ratings? A: The upgrade substitutes (Cornell Dubilier 381LR221M250H012 and Nichicon LGU2E221MELZ) extend the operating range to 105°C and maintain 3000-hour lifetime at this elevated temperature. This provides enhanced reliability for applications subject to thermal stress or requiring extended operational margins. The original ECO-S2EP221BX is rated only to 85°C.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All recommended substitute parts carry RoHS3 compliance certification, ensuring regulatory alignment with current environmental and hazardous substance restrictions.

Q: What is the difference between "Direct Manufacturer Substitutes" and "Parametric Equivalents"? A: Direct Manufacturer Substitutes meet all core electrical and mechanical parameters with equivalent or superior performance. Parametric Equivalents also meet all core parameters but may have minor variations in ESR or ripple current performance. Both categories are suitable for replacement; selection depends on application-specific performance requirements.

Q: Can I substitute the ECO-S2EP221BX with a part rated for a lower voltage? A: No. The voltage rating must equal or exceed 250 V. Substituting with a lower-rated part creates electrical stress and reliability risk. All recommended substitutes maintain the 250 V rating.

Q: Is the Rubycon 250USG220MEFCSN20X25 a suitable replacement despite its smaller diameter? A: The Rubycon part meets all core electrical parameters and is mechanically compatible with standard through-hole snap-in mounting. However, the 20.00 mm diameter (versus the original 22.00 mm) requires verification that the PCB layout accommodates the smaller footprint. If space constraints are not an issue, this part provides cost-effective substitution.

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