{
  "type": "passive",
  "specs": [
    {"name": "value_formatted", "description": "Human-readable value with SI prefix (e.g. 4.7 kohm, 100 nF)"},
    {"name": "tolerance", "description": "Tolerance specification (e.g. ±1%, ±10%)"},
    {"name": "package", "description": "Package type (e.g. 0603, 0805, 1206)"}
  ],
  "subtypes": {
    "passive.resistor": {
      "description": "Chip resistor",
      "example_mpn": "0603WAF5101T5E",
      "extra_specs": [
        {"name": "value_ohms", "description": "Resistance value", "unit": "ohm", "required": true},
        {"name": "power_rating_w", "description": "Power rating", "unit": "W"}
      ]
    },
    "passive.resistor.thick_film": {
      "description": "Thick film chip resistor",
      "extra_specs": [
        {"name": "value_ohms", "description": "Resistance value", "unit": "ohm", "required": true},
        {"name": "power_rating_w", "description": "Power rating", "unit": "W"}
      ]
    },
    "passive.resistor.thin_film": {
      "description": "Thin film chip resistor",
      "extra_specs": [
        {"name": "value_ohms", "description": "Resistance value", "unit": "ohm", "required": true},
        {"name": "power_rating_w", "description": "Power rating", "unit": "W"}
      ]
    },
    "passive.capacitor.ceramic": {
      "description": "Multi-layer ceramic capacitor (MLCC)",
      "example_mpn": "CL10B474KA8NNNC",
      "extra_specs": [
        {"name": "value_farads", "description": "Capacitance value", "unit": "F", "required": true},
        {"name": "voltage_rating_v", "description": "Rated voltage", "unit": "V"},
        {"name": "dielectric", "description": "Dielectric type (e.g. X7R, C0G, X5R)"}
      ]
    },
    "passive.capacitor.tantalum": {
      "description": "Tantalum capacitor",
      "extra_specs": [
        {"name": "value_farads", "description": "Capacitance value", "unit": "F", "required": true},
        {"name": "voltage_rating_v", "description": "Rated voltage", "unit": "V"}
      ]
    },
    "passive.capacitor.electrolytic": {
      "description": "Aluminum electrolytic capacitor",
      "extra_specs": [
        {"name": "value_farads", "description": "Capacitance value", "unit": "F", "required": true},
        {"name": "voltage_rating_v", "description": "Rated voltage", "unit": "V"}
      ]
    },
    "passive.inductor": {
      "description": "Inductor / choke",
      "extra_specs": [
        {"name": "value_henries", "description": "Inductance value", "unit": "H", "required": true},
        {"name": "current_rating_a", "description": "Saturation / rated current", "unit": "A"},
        {"name": "dcr_ohms", "description": "DC resistance", "unit": "ohm"}
      ]
    },
    "passive.ferrite_bead": {
      "description": "Ferrite bead",
      "extra_specs": [
        {"name": "value_henries", "description": "Impedance at test frequency (stored as inductance proxy)", "unit": "H"},
        {"name": "current_rating_a", "description": "Rated current", "unit": "A"},
        {"name": "dcr_ohms", "description": "DC resistance", "unit": "ohm"}
      ]
    }
  }
}