UBY2A391MHL

The UBY2A391MHL is a high-reliability miniature aluminum electrolytic capacitor in a radial lead can, offering 390 µF capacitance at a 100 V rating. It is engineered for high ripple current and low impedance in demanding thermal environments, with an operating temperature range from −40 °C to 135 °C and AEC-Q200 qualification.

This part is suited for automotive control electronics and other power-dense applications that require robust high-voltage decoupling, smoothing and energy buffering with proven endurance at elevated temperature.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance, rated for 100 V DC with polarization and ±20% tolerance.
• Low Impedance / Loss — Low dissipation factor (tan δ = 0.08 at 20 °C, 120 Hz) to minimize losses in power applications.
• Low ESR — ESR = 38 mΩ measured at 20 °C / 100 kHz, enabling efficient high-frequency filtering.
• High Ripple Current Capability — Designed for high ripple environments: 1.34 A at 120 Hz (low frequency) and 2.68 A at 100 kHz (high frequency).
• High-Temperature Endurance — Rated for operation down to −40 °C and up to 135 °C; endurance rated 2000 hours at 135 °C (63–100 V range).
• Automotive-Grade Reliability — AEC-Q200 qualified and RoHS compliant for use in regulated electronic systems.
• Radial Lead Package — φ16 × 25 mm can with 7.5 mm lead spacing (±0.5 mm); available in bulk (no terminal forming) or bag packing.
• Leakage Current — Specified leakage current of 1170 µA for predictable bias behavior.

Typical Applications

• Automotive powertrain control — Energy buffering and smoothing for engine control units and direct injection drives where high voltage and high-temperature endurance are required.
• Electric power steering and motor control — Handles sustained ripple currents and provides low-impedance decoupling in motor drive circuits.
• High-temperature electronics — Use in modules that operate at elevated ambient temperatures up to 135 °C, benefiting from the 2000-hour endurance rating at 135 °C.

Unique Advantages

• High ripple handling — Specified LF and HF ripple ratings (1.34 A @120 Hz, 2.68 A @100 kHz) support demanding switching and inverter environments.
• Low ESR at high frequency — 38 mΩ ESR at 100 kHz reduces heat generation and improves filtering performance in high-speed power circuits.
• Wide operating temperature — −40 °C to 135 °C rating with validated endurance at 135 °C for reliability in thermally challenging installations.
• Automotive-grade qualification — AEC-Q200 qualification and RoHS compliance make the part suitable for regulated automotive electronic subsystems.
• Compact radial can — φ16 × 25 mm form with 7.5 mm lead spacing provides a compact, through-hole solution for power boards and control modules.

Why Choose UBY2A391MHL?

UBY2A391MHL combines high-voltage capability (100 V) with substantial capacitance (390 µF), low ESR and strong ripple current capability to meet the needs of power-dense, high-temperature applications. Its AEC-Q200 qualification and 2000-hour endurance at 135 °C position it for use in automotive control modules and other systems requiring proven thermal reliability.

This radial-lead aluminum electrolytic delivers measurable performance benefits—reduced loss, effective high-frequency decoupling and durable operation—making it a practical choice for engineers specifying robust, through-hole capacitance in regulated environments.

Request a quote or contact sales to discuss availability, lead times, and volume pricing for UBY2A391MHL.