LGL2W391MELB40

The LGL2W391MELB40 is a 390 µF, 450 V aluminum electrolytic capacitor in a snap‑in radial can designed for general purpose electronic applications. As part of Nichicon’s LGL series, it combines a high voltage rating and compact "ultra‑smaller‑sized" snap‑in package with an extended operating temperature range to support demanding thermal environments.

This capacitor is specified for operation from −25 °C to +105 °C and is rated for 2000 hours at 105 °C under rated DC bias plus ripple current, providing defined endurance and stability for sustained high‑temperature use.

Key Features

• High Voltage Rating — Rated at 450 V to support high‑voltage circuits within the 400–450 V range documented for the LGL series.
• Nominal Capacitance and Tolerance — 390 µF nominal capacitance with ±20% tolerance (at 120 Hz, 20 °C), suitable where bulk capacitance tolerance is acceptable.
• Snap‑In Radial Can Package — Snap‑in terminal type and radial can package for secure chassis or PCB mounting in compact layouts.
• Compact Dimensions — Physical size approximately L: 4 cm × D: 3 cm, offering an ultra‑smaller footprint for space‑constrained designs.
• High Temperature Endurance — Qualified for operation up to 105 °C with an endurance rating of 2000 hours at 105 °C under rated conditions.
• Ripple Handling — Specified ripple current values: 1.28 A at 120 Hz and 1.83 A at 50 kHz; frequency coefficients provided for other frequencies across the LGL series.
• Leakage and Dissipation Characteristics — Leakage current specified as I ≤ 3√(C·V) µA after 5 minutes at 20 °C; tan δ limits provided for 400–450 V ratings.

Typical Applications

• General Purpose Electronics — Intended for general purpose use where a 390 µF, 450 V snap‑in capacitor is required and operation up to 105 °C is expected.
• High‑Voltage Filter and Energy Storage — Suited to circuits requiring a 450 V rated capacitor with documented ripple current performance (1.28 A @120 Hz; 1.83 A @50 kHz).
• Thermally Demanding Installations — Designed for applications that must maintain capacitance and leakage specifications after 2000 hours at 105 °C.

Unique Advantages

• 450 V Capability: Allows use in higher‑voltage circuits within the LGL rated range (400–450 V).
• Compact Snap‑In Form Factor: Snap‑in radial can and reduced footprint (approx. 4 cm × 3 cm) enable space‑efficient mounting and secure mechanical retention.
• High Temperature Endurance: 2000‑hour endurance at 105 °C gives predictable long‑term performance under elevated thermal stress.
• Documented Ripple Performance: Ripple current specifications at 120 Hz and 50 kHz plus frequency coefficients support selection for specific AC ripple conditions.
• Controlled Leakage and Dissipation: Leakage current and tan δ limits are specified and testable against standard conditions to support design validation.

Why Choose LGL2W391MELB40?

The LGL2W391MELB40 positions itself as a practical, high‑voltage aluminum electrolytic solution within Nichicon’s LGL series for designs that require a 390 µF capacitance at 450 V in a compact snap‑in package. Its combination of a defined high‑temperature rating, documented ripple current performance, and specified endurance makes it suitable for engineers seeking predictable behavior under sustained thermal and electrical stress.

This part is well suited to designers and procurement teams specifying general purpose, high‑voltage capacitors where space is limited and long‑term thermal endurance is required. The clear datasheet limits for capacitance tolerance, leakage, tan δ, and ripple handling aid verification and integration into robust designs.

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