[
  {
    "part_number": "test-cap-450v-220uf",
    "capacitance_uf": 220.0,
    "voltage_v": 450.0,
    "esr_ohm": 0.05,
    "max_current_a": 200.0,
    "price": 150.0,
    "source": "fixture"
  }
]