{
  "metadata": {
    "id": "kemet-x2-100nf-275vac",
    "name": "KEMET R46 0.1 µF 275 VAC X2 Safety Capacitor",
    "type": "capacitor",
    "manufacturer": "KEMET",
    "part_number": "R46KF310040P1M",
    "datasheet_url": "https://content.kemet.com/datasheets/KEM_F3094_R46_X2_275_110C_MIN.pdf",
    "description": "Class-X2 metallized polypropylene film EMI suppression capacitor. 0.1 µF (100 nF) ±20%, 275 VAC 50/60 Hz, ≤560 VDC, dV/dt 500 V/µs, dissipation factor ≤0.1% at 1 kHz. Self-healing construction in a UL94 V-0 plastic case (13.0 × 5.0 × 11.0 mm body) with 0.6 mm tinned-wire radial leads on 10 mm pitch. Operating range −40 °C to +110 °C, climatic category 40/110/56 (IEC 60068-1). Approvals: ENEC (V4413), UL/cUL 60384-14 (E97797), CQC IEC 60384-14, RoHS. Intended for across-the-line EMI suppression and as the C in an RC contact snubber across an AC relay's contacts to extinguish inductive arcs.",
    "tags": [
      "capacitor",
      "film_capacitor",
      "polypropylene",
      "x2",
      "safety_capacitor",
      "emi_suppression",
      "rc_snubber",
      "across_the_line",
      "self_healing",
      "kemet",
      "r46",
      "275vac",
      "100nf",
      "0.1uf",
      "radial",
      "through_hole",
      "10mm_pitch",
      "tht"
    ],
    "schema_version": "1.4.0",
    "version": "1.0",
    "taxonomy": [
      "passive.capacitor"
    ]
  },
  "domains": [
    {
      "domain": "electrical",
      "supply_voltage_V": [
        -275,
        275
      ],
      "power_domains": [
        {
          "id": "ac_line_275v",
          "name": "AC Line 275 V",
          "nominal_voltage_V": 275,
          "voltage_range_V": [
            -389,
            389
          ],
          "max_current_mA": 1000,
          "isolation_type": "non_isolated",
          "ground_reference": "floating",
          "description": "Across-the-line AC mains domain. Nominal 275 V AC RMS (50/60 Hz); range covers ±peak voltage (≈±389 V). max_current_mA reflects the datasheet's maximum Irms rating envelope over the operating frequency range (≤1 A RMS at the high-frequency end of the Irms-vs-f curve at 0.1 µF / 10 mm pitch, derated to 0 at 110 °C). Class-X2 means a capacitor failure does not expose the user to electric shock — used between line and neutral (or across relay contacts), never line-to-earth."
        }
      ],
      "resources": [
        {
          "id": "lead_a",
          "name": "Lead A",
          "description": "Tinned-wire radial lead, 0.6 mm dia, 30 mm long (packaging code 40, Bulk Bag Long Leads). Non-polarized — interchangeable with Lead B. 10.0 mm ±0.4 spacing to lead_b.",
          "functions": [
            {
              "name": "power_bus",
              "direction": "bidirectional",
              "signal_class": "power",
              "shareable_with": []
            }
          ],
          "power_domain_id": "ac_line_275v",
          "connector_type": "through_hole",
          "notes": "Lead spacing to lead_b is 10.0 mm ±0.4 (datasheet F3094 p.3 'S' column)."
        },
        {
          "id": "lead_b",
          "name": "Lead B",
          "description": "Tinned-wire radial lead, 0.6 mm dia, 30 mm long. Non-polarized — interchangeable with Lead A. 10.0 mm ±0.4 spacing to lead_a.",
          "functions": [
            {
              "name": "power_bus",
              "direction": "bidirectional",
              "signal_class": "power",
              "shareable_with": []
            }
          ],
          "power_domain_id": "ac_line_275v",
          "connector_type": "through_hole",
          "notes": "Lead spacing to lead_a is 10.0 mm ±0.4."
        }
      ],
      "interfaces": [
        {
          "id": "ac_line_terminal_a",
          "name": "AC Line Terminal A",
          "protocol": {
            "type": "power",
            "role": "peer"
          },
          "requires": [
            {
              "function": "power_bus",
              "count": 1
            }
          ],
          "constraints": {
            "max_connections": 1
          },
          "power_delivery": {
            "max_voltage_V": 305
          },
          "description": "Bidirectional AC-line terminal, mapped onto Lead A. Connects to one of the two AC nodes the snubber straddles (e.g. relay COM contact, line bus, or series-resistor lead).",
          "recommendations": "Pair with a 100 Ω 2 W flameproof resistor in series to form an RC snubber across an AC relay's contacts (extinguishes inductive arcs at contact opening on switching loads ≤ ~30 A AC).",
          "warnings": "Across-the-line use only (X2 class). Do not use line-to-earth. Endurance test runs 1.25·VR (≈344 V) AC plus hourly 1,000 V AC pulses — design margin assumes mains transients are absorbed elsewhere."
        },
        {
          "id": "ac_line_terminal_b",
          "name": "AC Line Terminal B",
          "protocol": {
            "type": "power",
            "role": "peer"
          },
          "requires": [
            {
              "function": "power_bus",
              "count": 1
            }
          ],
          "constraints": {
            "max_connections": 1
          },
          "power_delivery": {
            "max_voltage_V": 305
          },
          "description": "Bidirectional AC-line terminal, mapped onto Lead B. Connects to the other AC node (e.g. relay NO contact, neutral bus, or the second leg of an RC snubber).",
          "warnings": "Across-the-line use only (X2 class). Do not use line-to-earth."
        }
      ],
      "metadata": {
        "package_type": "Radial THT, 13.0×5.0×11.0 mm box, 10 mm lead spacing",
        "safety_standards": [
          "IEC 60384-14",
          "EN 60384-14",
          "UL 60384-14",
          "CAN/CSA E60384-14",
          "ENEC",
          "CQC"
        ]
      }
    },
    {
      "domain": "mechanical",
      "package_type": "Radial through-hole film capacitor, plastic case (UL94 V-0)",
      "dimensions_mm": {
        "length": 13,
        "width": 5,
        "height": 11
      },
      "resources": [
        {
          "id": "tht_lead_a",
          "name": "Through-hole lead A",
          "description": "0.6 mm dia tinned wire lead, 30 mm long. Soldered into PCB through-hole pad on 10 mm pitch.",
          "connector_type": "through_hole",
          "functions": [
            {
              "name": "MECHANICAL_MOUNT",
              "direction": "bidirectional",
              "signal_class": "mechanical_drive",
              "shareable_with": []
            }
          ]
        },
        {
          "id": "tht_lead_b",
          "name": "Through-hole lead B",
          "description": "0.6 mm dia tinned wire lead, 30 mm long. Soldered into PCB through-hole pad. 10 mm ±0.4 spacing from tht_lead_a.",
          "connector_type": "through_hole",
          "functions": [
            {
              "name": "MECHANICAL_MOUNT",
              "direction": "bidirectional",
              "signal_class": "mechanical_drive",
              "shareable_with": []
            }
          ]
        }
      ],
      "interfaces": [
        {
          "id": "pcb_mount",
          "name": "PCB Through-Hole Mount",
          "protocol": {
            "type": "mechanical_connection",
            "role": "mounting_point"
          },
          "requires": [
            {
              "function": "MECHANICAL_MOUNT",
              "count": 2
            }
          ],
          "description": "Two-lead radial through-hole soldered to PCB on 10 mm ±0.4 pitch. Body stands above the board; no chassis fastening, no mounting hole. Wave-soldering preheat ≤110 °C, peak ≤260 °C; manual iron 350 °C max for ≤3 s (datasheet F3094 p.10–11)."
        }
      ],
      "metadata": {
        "mounting_method": "through_hole_solder",
        "field_serviceable": false,
        "requires_special_tools": false
      }
    },
    {
      "domain": "thermal",
      "operating_temperature_C": [
        -40,
        110
      ],
      "resources": [
        {
          "id": "case_thermal",
          "name": "Plastic case thermal envelope",
          "description": "Self-extinguishing thermosetting resin in UL94 V-0 plastic case. Polypropylene element internal limit 110 °C; ambient/hottest-contact derating begins at 70 °C and reaches 0 % Irms at 110 °C.",
          "connector_type": "ambient_air",
          "functions": [
            {
              "name": "HEAT_SINK",
              "direction": "source",
              "signal_class": "power",
              "shareable_with": []
            }
          ]
        }
      ],
      "interfaces": [
        {
          "id": "ambient_convection",
          "name": "Ambient Convection",
          "protocol": {
            "type": "thermal_connection",
            "role": "thermal_source"
          },
          "requires": [
            {
              "function": "HEAT_SINK",
              "count": 1
            }
          ],
          "description": "Heat dissipated to surrounding air. No mandatory heatsink. Maximum Irms derates linearly above 70 °C ambient/contact temperature, reaching 0 % at 110 °C (datasheet F3094 p.5)."
        }
      ],
      "metadata": {
        "thermal_design_power_W": 0.05,
        "requires_thermal_management": false,
        "thermal_monitoring_available": false,
        "cooling_method": "natural_convection"
      }
    }
  ],
  "usage_notes": "Across-the-line X2 safety capacitor. Primary use cases: (1) RC contact snubber across an AC relay's contacts to extinguish inductive arcs at contact opening — pair with a series 100 Ω 2 W flameproof resistor (e.g. yageo-100r-2w-flameproof) for switching loads up to ~30 A AC. (2) Line-to-neutral EMI suppression on AC mains. Self-healing metallized polypropylene tolerates brief overvoltages by clearing pinholes in the metallization. The Kemet (Yageo) R46 series at 0.1 µF / 275 VAC ships only at 10 mm pitch; if the PCB layout requires 15 mm pitch, step up to 0.15 µF (R46KI3150...) or use the WIMA MKP/Vishay BFC2 equivalents at 15 mm.",
  "application_examples": [
    "RC contact snubber across an AC relay's contacts on a 20 A smart-plug board (with 100 Ω 2 W series resistor)",
    "Line-to-neutral EMI suppression on the input of a switching power supply",
    "Differential-mode mains filter capacitor in a single-stage X2 + common-mode-choke filter"
  ],
  "compatibility_notes": "Pairs with the 100 Ω 2 W flameproof resistor (yageo-100r-2w-flameproof) to form an RC snubber. Both must sit on the AC-line side of the relay; route the snubber leads as short as possible to minimize parasitic inductance. Class X2 is for line-to-line / across-the-line use only — do not substitute for a Y-class capacitor in line-to-earth positions.",
  "warnings": [
    "X2 class only — do NOT use line-to-earth. Use a Y-class capacitor (e.g. Y2) for line-to-earth filtering.",
    "Not for use 'in series with mains' (datasheet p.1) — failure-open mode is acceptable across-the-line but unsafe in series.",
    "Polypropylene element internal limit is 110 °C; Irms derates to zero at 110 °C ambient/contact temperature.",
    "Wave-soldering preheat ≤110 °C, peak ≤260 °C, two cycles max. Manual iron 350 °C max for ≤3 s. Reflow soldering is not recommended for through-hole film capacitors.",
    "1,000-hour endurance test runs at 1.25·VR with hourly 1,000 V AC pulses (EN/IEC 60384-14) — install fuses or other transient protection upstream if mains transients exceed the X2 envelope."
  ]
}