ECO-S2WB181DA Equivalent & Substitute Parts

Part Overview

The ECO-S2WB181DA is a 180 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Panasonic Electronic Components. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates across a temperature range of -25°C to 105°C with a 3000-hour lifetime rating at 105°C, serving general-purpose applications requiring high-voltage energy storage and filtering.

Substiute Parts

ECO-S2WB181DA

Panasonic Electronic ComponentsIn Stock: 1068ECO-S2WB181DA Datasheet

Current PartRFQ

381LX181M450K032

Cornell Dubilier Electronics (CDE)In Stock: 800381LX181M450K032 Datasheet

DirectRFQ

B43508C5187M000

EPCOS - TDK ElectronicsIn Stock: 1346B43508C5187M000 Datasheet

DirectRFQ

LGU2W181MELB

NichiconIn Stock: 1044LGU2W181MELB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECO-S2WB181DA is determined by strict equivalence across the following parameters:

• Capacitance value: 180 µF (exact match required)
• Voltage rating: 450 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package type: Radial, Can - Snap-In (exact match required)
• Lead spacing: 0.394" (10.00mm) (exact match required)
• Diameter: 1.181" (30.00mm) (exact match required)
• Mounting type: Through Hole (exact match required)
• Lifetime rating: 3000 Hrs @ 105°C (exact match required)
• Operating temperature range: -25°C ~ 105°C minimum (equal or wider range acceptable)

All three substitute parts meet these core electrical and mechanical requirements, enabling direct functional replacement in applications originally designed for the ECO-S2WB181DA.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are functionally equivalent to the ECO-S2WB181DA based on electrical and mechanical parameters. Selection should prioritize the following factors:

Product Status and Compliance: The ECO-S2WB181DA is obsolete. All substitute parts (381LX181M450K032, B43508C5187M000, and LGU2W181MELB) carry active product status, ensuring long-term availability and supply chain continuity. All substitutes are ROHS3 compliant, whereas the original part is RoHS non-compliant.

Physical Dimensions: Height variation exists among substitutes. The LGU2W181MELB offers the most compact profile at 1.181" (30.00mm), while the 381LX181M450K032 reaches 1.457" (37.00mm). The B43508C5187M000 provides a mid-range height of 1.260" (32.00mm). PCB layout constraints may influence selection based on available vertical clearance.

Operating Temperature Range: The B43508C5187M000 extends the lower operating limit to -40°C, compared to -25°C for the other substitutes. Applications requiring enhanced cold-temperature performance should specify this part.

Inventory Availability: All three substitutes maintain active stock levels, with B43508C5187M000 showing the highest inventory (1288 pcs), followed by 381LX181M450K032 (768 pcs) and LGU2W181MELB (963 pcs).

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts directly replace the ECO-S2WB181DA without PCB modification?

A: Yes. All three substitute parts share identical lead spacing (0.394" / 10.00mm) and diameter (1.181" / 30.00mm), enabling direct mounting on existing PCB footprints. Height differences do not affect electrical function but may require verification of available vertical clearance in the assembly.

Q: What is the significance of the height variation among substitute parts?

A: Height differences range from 1.181" to 1.457". In applications with constrained vertical space, the LGU2W181MELB (shortest at 1.181") or B43508C5187M000 (1.260") may be preferred. The 381LX181M450K032 (1.457") requires the most clearance. Verify PCB layout constraints before final selection.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts are ROHS3 compliant. The original ECO-S2WB181DA is RoHS non-compliant. For applications subject to RoHS regulations, any of the three substitutes satisfy compliance requirements.

Q: Does operating temperature range affect part selection?

A: The B43508C5187M000 operates from -40°C to 105°C, extending the lower temperature limit by 15°C compared to the other substitutes (-25°C to 105°C). For applications requiring enhanced cold-temperature performance, the B43508C5187M000 is the appropriate choice. For standard applications within -25°C to 105°C, all substitutes are equivalent.

Q: What is the impact of ESR (Equivalent Series Resistance) differences?

A: ESR values vary among parts where specified: ECO-S2WB181DA (921 mOhm @ 120Hz), B43508C5187M000 (680 mOhm @ 100Hz). Lower ESR generally indicates better high-frequency performance and reduced heat generation. The B43508C5187M000 offers superior ESR characteristics. For ripple current applications, verify that the selected substitute meets the specific ripple current requirements of your circuit.

Q: Are these parts suitable for high-frequency applications?

A: All parts are rated for ripple current at both low and high frequencies. Ripple current ratings vary: ECO-S2WB181DA (991.8 mA @ 100 kHz), 381LX181M450K032 (1.2 A @ 20 kHz), B43508C5187M000 (1.01 A @ 100 Hz), and LGU2W181MELB (1.43 A @ 50 kHz). Select based on your circuit's specific frequency and ripple current requirements.