LAR2W181MELB30

The LAR2W181MELB30 is an aluminum electrolytic capacitor in a snap‑in terminal, radial can package sized φ30 × 30L. It provides 180 µF capacitance at a 450 V rated voltage and is intended for general‑purpose use where high‑voltage bulk capacitance and robust ripple handling are required.

Designed for sustained operation at elevated temperature, this part withstands 2000 hours of rated ripple current at 105°C, includes features to reduce short incidence under overvoltage conditions, and is RoHS compliant.

Key Features

• Rated Voltage — 450 V nominal rating for high‑voltage applications requiring reliable DC energy storage.
• Capacitance & Tolerance — 180 µF with ±20% tolerance (measured at 120 Hz, 20°C).
• High‑Temperature Endurance — Qualified to withstand 2000 hours of rated ripple current at 105°C; post‑test limits: capacitance change within ±20%, tan δ ≤ 200% of initial spec, leakage current ≤ initial spec.
• Operating Temperature Range — −25 °C to +105 °C for the 400–450 V class.
• Ripple Current Performance — Specified ripple current: 870 mA at 120 Hz and 1.244 A at 50 kHz. Frequency coefficients for rated ripple current for the 400/450 V class are provided in the datasheet (e.g., 50 Hz: 0.77; 120 Hz: 1.00; 1 kHz: 1.30; 50 kHz+: 1.43).
• Safety Performance Under Overvoltage — When subjected to 1.5× rated voltage with limited current (1 A), more than 60% of capacitors meet passing criteria (pressure relief vent operates normally or remains closed without short or flame for 10 minutes).
• Package & Mounting — Snap‑in terminal type, radial can; compact footprint approximately 30 mm × 30 mm.
• Environmental Compliance — Compliant with RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• General purpose power circuits — Bulk energy storage and DC filtering where a 450 V, 180 µF capacitor with sustained ripple capability is required.
• High‑temperature environments — Systems that need components rated for continuous operation up to 105 °C with verified 2000‑hour ripple endurance.
• Snap‑in, board‑mounted designs — Applications that require a radial can capacitor with snap‑in terminals for secure mounting and compact footprint.

Unique Advantages

• High‑voltage capability: 450 V rating enables use in higher voltage DC systems without increasing board count.
• Demonstrated ripple endurance: 2000 hours at 105 °C under rated ripple current provides predictable life and performance in demanding thermal and electrical environments.
• Frequency‑aware ripple rating: Published ripple current values and frequency coefficients let designers size the capacitor accurately across low and high frequencies.
• Built‑in safety consideration: Overvoltage behavior and pressure relief vent criteria reduce the incidence of catastrophic shorting under fault conditions.
• RoHS compliant: Conforms to applicable RoHS directives for regulatory and environmental compatibility.

Why Choose LAR2W181MELB30?

The LAR2W181MELB30 positions itself as a reliable, high‑voltage aluminum electrolytic solution for designers needing 180 µF capacitance at 450 V in a snap‑in radial package. Its endurance rating at 105 °C and defined ripple current performance give engineers quantifiable data for thermal and lifetime budgeting.

This part is suited to designs that prioritize robust ripple handling, predictable post‑endurance characteristics, and RoHS compliance. Its documented safety behavior under overvoltage and compact can footprint help simplify system integration in board‑mounted high‑voltage applications.

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