UBY1J391MHL

The UBY1J391MHL is a radial-lead aluminum electrolytic capacitor offering 390 µF capacitance at a 63 V rating. It is built for high-ripple, high-temperature environments and is supplied in a compact φ12.5 × 20 mm can with 5.0 mm lead spacing.

Designed for demanding control electronics, this part targets automotive and other applications that require elevated temperature endurance, substantial ripple-current handling and low equivalent series resistance (ESR).

Key Features

• Capacitance & Voltage — 390 µF capacitance rated at 63 V with tolerance −20% to +20% for bulk energy storage and decoupling.
• High Temperature Range — Rated operating temperature −40 °C to +135 °C, enabling sustained operation in elevated-temperature environments.
• High Ripple Current — Low-frequency ripple current 710 mA (120 Hz) and high-frequency ripple current 1.42 A (100 kHz) to support power-supply smoothing and transient loads.
• Low ESR — ESR of 74 mΩ measured at 20 °C / 100 kHz to reduce losses and improve thermal performance under ripple stress.
• Endurance — Rated for 2000 hours at 135 °C (for 63 V to 100 V category), with defined post-test limits for capacitance change, tan δ and leakage current.
• Leakage & Dissipation — Specified leakage current 737.1 µA and tangent of loss angle (tan δ) 0.10 at 63 V (measured at 20 °C, 120 Hz) for predictable dissipation behavior.
• Package & Mounting — Radial lead can (φ12.5 × 20 mm) with 5.0 mm lead spacing; available in Bulk (no terminal forming) or Bag packing to suit assembly preferences.
• Compliance & Qualification — RoHS compliant and AEC-Q200 qualified, supporting use in automotive-grade designs where that qualification is required.

Typical Applications

• Automotive control circuits — Suited for control modules such as electric power steering and direct injection engine drive where high ripple current and high-temperature endurance are required.
• Power-supply smoothing — Acts as bulk decoupling and ripple suppression in DC power rails that experience high-frequency switching and transient currents.
• Embedded power electronics — Provides stable capacitance and low ESR in compact, board-mounted power subsystems operating at elevated ambient temperatures.

Unique Advantages

• High ripple capability: Specified low- and high-frequency ripple currents (710 mA @120 Hz, 1.42 A @100 kHz) enable reliable filtering under demanding switching conditions.
• High-temperature endurance: Rated to −40 °C to +135 °C with a 2000-hour endurance rating at 135 °C, supporting long-term operation in hot environments.
• Low ESR: 74 mΩ at 100 kHz reduces I²R losses and heat generation, helping maintain performance and reliability under load.
• Automotive-grade qualification: AEC-Q200 qualification and RoHS compliance provide traceable suitability for vehicle electronic systems and regulated designs.
• Compact radial package: φ12.5 × 20 mm can with 5.0 mm lead spacing delivers significant capacitance density for space-constrained layouts.

Why Choose UBY1J391MHL?

UBY1J391MHL balances high capacitance, low ESR and elevated-temperature endurance in a compact radial-can package, delivering stable ripple performance for control and power electronics. Its AEC-Q200 qualification and RoHS compliance make it appropriate for designs that require automotive-grade components and regulatory conformity.

This capacitor is well suited to engineers specifying components for automotive control modules and other embedded power systems that demand predictable leakage, dissipation (tan δ), and long-term operation at high ambient temperatures. The combination of measurable ripple ratings and defined endurance limits supports reliable BOM selection and lifetime planning.

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