UTHW6121MND

The UTHW6121MND is a radial‑lead, miniature aluminum electrolytic capacitor designed for general‑purpose high‑voltage applications. It combines a 120 µF capacitance with a 420 V rated voltage in a compact can-style package suitable for through‑hole mounting.

Engineered for long life and stable operation across a wide temperature range, this capacitor offers defined ripple handling, controlled leakage characteristics and endurance under DC bias plus rated ripple at elevated temperature, making it appropriate for designs that require reliable high‑voltage bulk capacitance in a radial package.

Key Features

• Capacitance & Voltage — 120 µF nominal capacitance with a 420 V rated voltage and ±20% capacitance tolerance at 120 Hz, 20°C.
• Package & Mounting — Radial lead, can package with 7.5 mm lead spacing and approximate body size L: 3.6 × D: 1.6 cm for compact through‑hole installations.
• Operating Temperature — Specified for −40°C to +105°C operation.
• Long Life Endurance — Rated for 5000 hours at 105°C with DC bias plus rated ripple current; after endurance testing, capacitance remains within ±20% of initial value, tan δ remains ≤200% of initial specified value, and leakage current remains within the initial specified limit.
• Defined Leakage Current — Leakage current limits per datasheet: after 1 minute at 20°C ≤ 0.04·C·V + 100 µA; after 5 minutes at 20°C ≤ 0.02·C·V + 25 µA (where C is µF and V is rated voltage).
• Loss Factor (tan δ) — Maximum tan δ of 0.20 at the 420 V rating (measured at 120 Hz, 20°C).
• Ripple Current Capability — Rated ripple current of 820 mA at 120 Hz and 1.312 A at 10 kHz. Frequency coefficients from the series data: 1.00 at 120 Hz and 1.60 at 10 kHz for scaling ripple limits.
• Low‑Temperature Stability — Impedance stability characterized by Z(−25°C)/Z(+20°C) ratio up to 8 at the 420 V rating (measured at 120 Hz).
• Polarized Device — Polarized aluminum electrolytic construction for DC applications.

Typical Applications

• General purpose high‑voltage circuits — Suited for circuits that require a 120 µF, 420 V polarized capacitor in a radial can package for through‑hole assembly.
• DC bus and bulk smoothing — Provides bulk capacitance and ripple handling where defined ripple current and long life at elevated temperature are required.
• Power electronics assemblies — Compact high‑voltage capacitor option for designs needing stable capacitance and controlled leakage over −40°C to +105°C.

Unique Advantages

• High voltage capability: 420 V rating enables use in higher DC voltage applications while maintaining a moderate capacitance value.
• Miniature radial can: Small footprint (approx. 3.6 × 1.6 cm) and radial leads with 7.5 mm spacing simplify placement in through‑hole PCBs where board space is limited.
• Long elevated‑temperature life: 5000 hours endurance at 105°C with DC bias plus rated ripple current provides predictable performance over extended operating periods.
• Measured ripple and frequency behavior: Published ripple current ratings at 120 Hz and 10 kHz plus frequency coefficients allow accurate thermal and ripple budgeting in designs.
• Controlled leakage characteristics: Datasheet leakage formulas and timed measurements provide verifiable leakage expectations for design validation and quality control.
• Wide operating range: −40°C to +105°C rating supports applications across typical industrial temperature envelopes.

Why Choose UTHW6121MND?

UTHW6121MND positions itself as a compact, high‑voltage aluminum electrolytic solution for designers who need reliable bulk capacitance with defined ripple handling and long endurance at elevated temperature. Its combination of a 120 µF value, 420 V rating, radial can packaging and comprehensive datasheet parameters makes it suitable for engineers specifying verified electrical and lifetime characteristics into their assemblies.

This capacitor is appropriate for designs that prioritize predictable leakage behavior, measurable tan δ limits, and endurance performance under DC bias plus ripple—providing long‑term value in stabilized power rails and other general‑purpose high‑voltage applications.

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