The KYOCERA AVX SCMR22C155PSBA0H is a 1.5 F supercapacitor rated at 5 V, from the SCM High Reliability series. That 1.5 F stores enough energy to keep a real-time clock or SRAM alive through a brief mains dropout, or to ride through a power interrupt on a microcontroller's backup rail — but the 200 mOhm ESR at 1 kHz is the spec that governs how fast you can pull that energy out. A 200 mOhm ESR means the voltage drop under a 1 A pulse is 200 mV before the capacitance even starts to discharge.
Thermal budget and lifetime
Rated for 1000 hours at 65 °C, the SCMR22C155PSBA0H is designed for environments where the ambient stays below that ceiling — think industrial control cabinets, metering, or telecom equipment with moderate airflow. The -40 °C to 65 °C operating range covers most indoor and sheltered outdoor installations, but sustained operation near 65 °C will age the cap faster than the 1000-hour spec suggests; derating the voltage or the temperature extends useful life.
Board fit and mounting
Through-hole radial can with PC pins, 0.453-inch (11.50 mm) lead spacing. That footprint fits standard 0.1-inch grid prototyping boards, and the radial leads let it sit upright next to a TO-220 regulator or a terminal block without a custom bracket.