LHX2W331MELB45

The LHX2W331MELB45 is a snap‑in terminal aluminum electrolytic capacitor from Nichicon’s LHX series, engineered for high‑temperature long‑life applications. It offers 330 µF capacitance at a 450 V rating in a radial can snap‑in package, designed for equipment that requires sustained performance up to 125°C.

This part targets general‑purpose power systems and industrial equipment where high voltage filtering, bulk energy storage, and reliable operation under elevated temperatures are required. Key value propositions include high voltage capability, long endurance at 125°C, and a snap‑in mounting style for secure board installation.

Key Features

• Capacitance & Voltage — 330 µF nominal capacitance with a 450 V rated voltage, suitable for high‑voltage filtering and energy storage.
• High‑Temperature Long Life — Designed for operation from −40°C to +125°C with a lifetime rating of 5000 hours at 125°C under DC bias plus rated ripple current.
• Snap‑In Radial Can Package — Snap‑in terminal mounting provides robust mechanical retention for PCB assembly; package size is φ30 × 45 mm (L: 4.5 × D: 3 cm).
• Electrical Stability — Capacitance tolerance ±20% (120 Hz, 20°C), leakage current specification I ≤ 3√CV (µA) after 5 minutes at 20°C, and tan δ ≤ 0.20 (120 Hz, 20°C).
• Ripple Current Capability — Rated ripple current 1.48 A at 120 Hz (125°C); frequency dependence yields higher allowable ripple at higher frequencies (example: ~2.116 A at 50 kHz as provided).
• Low‑Temperature Performance — Impedance stability tested to −25°C with Z(−25°C)/Z(+20°C) ≤ 8 at 120 Hz, supporting reliable operation across temperature swings.
• RoHS Compliant — Meets RoHS directive requirements (2011/65/EU, (EU)2015/863).

Typical Applications

• High‑temperature power electronics — Use for bulk filtering and energy smoothing in equipment designed to operate continuously at elevated temperatures (up to 125°C).
• Industrial converters and inverters — Suitable for high‑voltage DC link or smoothing stages where 450 V rating and high ripple capability are required.
• General‑purpose high‑voltage systems — Applicable where polarized, high‑capacitance components are needed for energy storage and voltage stabilization.

Unique Advantages

• High voltage, high capacitance combination: 330 µF at 450 V provides substantial energy storage in a compact radial can for high‑voltage designs.
• Long life at elevated temperature: 5000 hours endurance at 125°C ensures sustained performance in harsh thermal environments, reducing maintenance and replacement frequency.
• Robust mounting: Snap‑in terminals deliver secure mechanical retention on the PCB for applications with vibration or high current handling.
• Verified electrical limits: Clear leakage current formula (I ≤ 3√CV) and tan δ ≤ 0.20 provide measurable criteria for design verification and quality control.
• Frequency‑dependent ripple handling: Specified ripple current values (1.48 A at 120 Hz, ~2.116 A at 50 kHz) allow designers to size capacitors based on operating ripple frequency.
• Regulatory compliance: RoHS compliance supports use in regulated markets and simplifies environmental compliance management.

Why Choose LHX2W331MELB45?

The LHX2W331MELB45 balances high voltage capability with substantial capacitance and proven endurance at elevated temperatures, making it appropriate for designers of industrial power electronics and other equipment that operate under sustained thermal stress. Its snap‑in radial can construction supports secure PCB mounting while the electrical specifications (leakage current, tan δ, ripple ratings) provide clear parameters for reliable system design.

This capacitor is suited to engineers and procurement teams seeking a RoHS‑compliant, long‑life aluminum electrolytic solution for high‑voltage, high‑temperature applications where predictable performance and measurable endurance are priorities.

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