main
Ray Publish 0.1.1 68e0f6c
{
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  "type": "component",
  "slug": "ct304b-800s",
  "title": "CT304B-800S",
  "brief": "Changjiang Electronics Tech (CJ) TRIACs, TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.1",
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  "component": {
    "mpn": "CT304B-800S",
    "manufacturer": "Changjiang Electronics Tech (CJ)",
    "package": "TO-220",
    "pin_count": 3,
    "category": "Transistors",
    "subcategory": "TRIACs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/3fd2447f325db43abeada0d203cecc6d.pdf",
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      "source": "Component Ocean /api/assign-pns",
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        "status": "no match"
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      "mouser": {
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      },
      {
        "number": "2",
        "name": "MAIN TERMINAL 2 (MT2)",
        "type": "passive",
        "description": "Main terminal 2 of the TRIAC, which is rated for the 800 V repetitive peak off-state voltage (VDRM/VRRM) of the CT304B-800S variant and 4 A RMS on-state current."
      },
      {
        "number": "3",
        "name": "GATE",
        "type": "input",
        "description": "Gate terminal used to trigger the TRIAC, with a peak gate current IGM of 4 A (tp=20µs, Tj=125℃), an average gate power PG(AV) of 1 W, a gate trigger voltage VGT of at most 1.3 V, and a gate trigger current IGT of at most 10 mA for the S suffix."
      }
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    "provenance": {
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        "extractor": "extract_pins 0.3",
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        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet gives the TO-220BK terminal names and numbers (1 MAIN TERMINAL 1, 2 MAIN TERMINAL 2, 3; The datasheet does not state pin electrical types for the main terminals; 'passive' was assigned as ; The gate trigger table in the extracted text is garbled, so the IGT limit of 10 mA is taken from the"
        ],
        "pages_sent": 4,
        "cost_usd": 0.0198,
        "at": "2026-10-30T19:53:42"
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        "pages": 4,
        "sha256": "63ac3b7b85f088b4",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
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        "file": "ct304b-800s.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
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        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
        "checked": "2026-10-30",
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        "sha256": "fbf554b7187ed2c398d827118a45c61df97cc3d2c366b234d004e1fc9edcde65",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjiang Electronics Tech (CJ)",
      "Package": "TO-220",
      "Category": "Transistors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "63ac3b7b85f088b499e6403d030ca38218bcac59512c6b0ecb8b5bc2278386a3",
      "rows": [
        {
          "name": "RMS on-state current",
          "symbol": "IT(RMS)",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "TO-220BK(TC≤110℃), Fig. 1,2",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Repetitive peak off-state voltage (800V variant)",
          "symbol": "VDRM/VRRM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 800,
          "conditions": "Tj=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Non repetitive surge peak on-state current",
          "symbol": "ITSM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "Full sine wave, Tj(init)=25℃, tp=20ms; Fig. 3,5",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "I2t value",
          "symbol": "I2t",
          "kind": "absolute_maximum",
          "unit": "A2s",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "tp=10ms",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Critical rate of rise of on-state current",
          "symbol": "dIT/dt",
          "kind": "absolute_maximum",
          "unit": "A/μs",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "IG=2*IGT, tr≤10ns, F=120HZ, Tj=125℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Peak gate current",
          "symbol": "IGM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "tp=20µs, Tj=125℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Average gate power",
          "symbol": "PG(AV)",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Tj=125℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Gate trigger current Ⅰ-Ⅱ-Ⅲ (S: IGT1-3≤10mA)",
          "symbol": "IGT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "VD=12V, Tj=25℃, RL=30Ω",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate trigger voltage Ⅰ-Ⅱ-Ⅲ",
          "symbol": "VGT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.3,
          "conditions": "VD=12V, Tj=25℃, RL=30Ω",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Non-triggering gate voltage",
          "symbol": "VGD",
          "kind": "electrical",
          "unit": "V",
          "min": 0.2,
          "typ": null,
          "max": null,
          "conditions": "VD=VDRM, Tj=125℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Holding current (S column)",
          "symbol": "IH",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Latching current Ⅰ-Ⅲ (S column)",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "IT=100mA, IG=1.2IGT",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Latching current Ⅱ (S column)",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "IT=100mA, IG=1.2IGT",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Critical rate of rise of off-state voltage (S column)",
          "symbol": "dVD/dt",
          "kind": "electrical",
          "unit": "V/μs",
          "min": 40,
          "typ": null,
          "max": null,
          "conditions": "VD=67%VDRM, Gate Open, Tj=125℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "On-state voltage",
          "symbol": "VTM",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.55,
          "conditions": "ITM=8.5A, tp=380μs, Fig. 4",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Repetitive peak off-state current at Tj=25℃",
          "symbol": "IDRM",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VD=VDRM/VRRM, Tj=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Repetitive peak off-state current at Tj=125℃",
          "symbol": "IRRM",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VD=VDRM/VRRM, Tj=125℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to case (AC)",
          "symbol": "Rth (j-c)",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 2.6,
          "conditions": "AC",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient",
          "symbol": "Rth (j-a)",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 60,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "CT304B-800S (Changjiang Electronics Tech (CJ)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray"
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  "description": "Changjiang Electronics Tech (CJ) TRIACs, TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "org": "adom"
}