UCX1H681MNJ1MS

The UCX1H681MNJ1MS is a chip‑type aluminum electrolytic capacitor designed for high‑temperature operation up to +135°C. With a 680 µF capacitance at 50 V rating and AEC‑Q200 qualification, it targets demanding environments that require robust power filtering and energy storage.

Built for automated surface‑mount assembly, this part combines high capacitance density, specified low‑temperature ESR behavior, and long endurance for applications in automotive and other high‑temperature electronics.

Key Features

• Capacitance & Voltage — 680 µF nominal capacitance with a 50 V rated voltage and ±20% tolerance at 20°C (120 Hz), providing substantial bulk capacitance for power rails.
• High Temperature Range — Rated for continuous operation from −40°C to +135°C and endurance of 2000 hours at 135°C as specified in the datasheet.
• Low‑Temperature ESR Specification — ESR performance is specified following the −40°C test, supporting reliable performance across the full operating temperature range; measured ESR is 70 mΩ at 100 kHz.
• Ripple Current Capability — 600 mA ripple at 120 Hz (low frequency) and 1.2 A ripple at 10 kHz (high frequency), suitable for smoothing and decoupling in switching power stages.
• Surface‑Mount, Tape‑Fed Package — Chip/can SMD package designed for automatic mounting machines fed with carrier tape; recommended PCB land size is 1.83 × 1.83 cm.
• Automotive Qualification & Environmental Compliance — AEC‑Q200 qualified and RoHS compliant (2011/65/EU, (EU)2015/863), supporting regulated applications and automotive program use.
• Robust Soldering and Reliability Characteristics — Datasheet specifies resistance to soldering heat (hot plate 30 s at 250°C) and defined endurance and shelf‑life tests to ensure long‑term stability.
• Compact Footprint — Case dimensions L: 1.65 cm × D: 1.8 cm for compact power module integration.

Typical Applications

• Automotive electronic modules — Suited for power filtering and bulk energy storage in automotive systems thanks to AEC‑Q200 qualification and an operating range of −40°C to +135°C.
• High‑temperature power electronics — Designed for DC link smoothing and decoupling where continuous elevated temperatures and soldering heat resistance are required.
• Surface‑mount power supplies — Large capacitance and defined ripple current ratings make it useful for switching regulator output filtering and transient suppression on compact PCBs.

Unique Advantages

• High‑temperature endurance: 2000 hours at 135°C offers predictable lifetime performance in elevated‑temperature assemblies.
• Temperature‑verified ESR: ESR specified after −40°C testing and a measured 70 mΩ at 100 kHz provide confidence in low‑temperature start‑up and high‑frequency behavior.
• Automated assembly ready: Carrier‑tape compatibility and an SMD can package simplify integration into automated manufacturing flows.
• Automotive readiness: AEC‑Q200 qualification and RoHS compliance help reduce qualification effort for regulated applications.
• Clear ripple handling: Documented ripple current values at both low and high frequencies enable designers to size thermal and reliability margins accurately.

Why Choose UCX1H681MNJ1MS?

UCX1H681MNJ1MS is positioned for engineers needing a compact, high‑capacitance SMD aluminum electrolytic that maintains performance across −40°C to +135°C. Its defined ESR after low‑temperature testing, measurable ripple current capability, and AEC‑Q200 qualification make it appropriate for demanding power management and automotive environments.

Selecting this part supports designs that require long endurance in high‑temperature operation, tape‑fed surface‑mount placement, and verifiable electrical performance for reliable power filtering and energy buffering.

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