S4025LTP

{
  "schema_version": 1,
  "type": "component",
  "slug": "s4025ltp",
  "title": "S4025LTP",
  "brief": "Littelfuse Thyristors (SCR)/Modules, TO-220AB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "transistors-thyristors",
    "s4025ltp",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "S4025LTP",
    "manufacturer": "Littelfuse",
    "package": "TO-220AB",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Thyristors (SCR)/Modules",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904990020157440",
    "parts": {
      "symbol": "s4025ltp.kicad_sym",
      "footprint": "s4025ltp.kicad_mod",
      "model_3d": "s4025ltp-hero.glb",
      "model_3d_plain": "s4025ltp-etched.glb",
      "model_3d_step": "s4025ltp-etched.step",
      "model_3d_step_plain": "s4025ltp.step",
      "lbr": "s4025ltp.lbr"
    },
    "distributor_links": {
      "lcsc": "C5440406",
      "digikey": "F7301-ND",
      "mouser": "576-S4025LTP"
    },
    "distributor_check": {
      "checked_at": "2026-10-15T22:43:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "F7301-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "576-S4025LTP",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "passive",
        "description": "SCR cathode main terminal, labeled CATHODE on the TO-220AB L-Package drawing (the device is rated for IT(RMS) 20 A or 25 A depending on the part)."
      },
      {
        "number": "2",
        "name": "ANODE",
        "type": "passive",
        "description": "SCR anode main terminal, labeled ANODE on the TO-220AB L-Package drawing; the isolated mounting tab is limited to a maximum torque of 8 in-lbs (0.904 Nm)."
      },
      {
        "number": "3",
        "name": "GATE",
        "type": "input",
        "description": "Gate trigger terminal, labeled GATE on the drawing; the 25 A device specifies IGT 35 mA max, VGT 1.5 V max at VD = 12 V, and peak gate current IGM 3.5 A at TJ = 125°C."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet's TO-220AB L-Package drawing labels the leads CATHODE, ANODE, GATE but does not print ; The isolated mounting tab is not listed as a numbered pin in the datasheet. It was not added as a pi; MPN S4025LTP decodes as S (SCR), 40 (400 V), 25 (25 A), L (TO-220 isolated), TP (tube packing), whic"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0469,
        "at": "2026-10-15T22:43:03"
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      "datasheet": {
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        "pages": 9,
        "sha256": "97a418a8c58d2bc0",
        "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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    "models_3d": [
      {
        "file": "s4025ltp.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          10.25,
          4.455,
          28.525
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "s4025ltp-etched.step",
        "role": "eda",
        "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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          28.525
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        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "cd3d5efdfe5b1ff8ca72dcdc8a691cb71347be7664300eaba850309ac4160d1e",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Littelfuse",
      "Package": "TO-220AB",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "appearance": {
      "contacts": {
        "quote": "Lead Bend MIL-STD-750, M-2036 Cond E Terminal Finish 100% Matte Tin-plated",
        "page": 6,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "97a418a8c58d2bc0d1f71f1aac972c9ba855a9cb44ffee7e4b4bcf18ac34a5b3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "97a418a8c58d2bc0d1f71f1aac972c9ba855a9cb44ffee7e4b4bcf18ac34a5b3",
      "rows": [
        {
          "name": "Peak repetitive off-state / reverse voltage (400V variant, part-number code 40)",
          "symbol": "VDRM/VRRM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "Part-numbering table: 40 = 400V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Gate trigger current",
          "symbol": "IGT",
          "kind": "electrical",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 35,
          "conditions": "VD = 12V, RL = 30 Ω; Sxx25x column",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate trigger voltage",
          "symbol": "VGT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "VD = 12V, RL = 30 Ω",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Critical rate of rise of off-state voltage, TJ = 100°C, 400V",
          "symbol": "dv/dt",
          "kind": "electrical",
          "unit": "V/μs",
          "min": 450,
          "typ": null,
          "max": null,
          "conditions": "VD = VDRM; gate open; TJ = 100°C; 400V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Critical rate of rise of off-state voltage, TJ = 125°C, 400V",
          "symbol": "dv/dt",
          "kind": "electrical",
          "unit": "V/μs",
          "min": 350,
          "typ": null,
          "max": null,
          "conditions": "VD = VDRM; gate open; TJ = 125°C; 400V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate non-trigger voltage",
          "symbol": "VGD",
          "kind": "electrical",
          "unit": "V",
          "min": 0.2,
          "typ": null,
          "max": null,
          "conditions": "VD = VDRM, RL = 3.3 kΩ, TJ = 125°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Holding current",
          "symbol": "IH",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "IT = 400mA (initial); Sxx25x column",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Turn-off time",
          "symbol": "tq",
          "kind": "electrical",
          "unit": "μs",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "(1) IT=2A; tp=50μs; dv/dt=5V/μs; di/dt=-30A/μs",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "On-state voltage (25A device)",
          "symbol": "VTM",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.6,
          "conditions": "25A Device: IT = 50A; tp = 380μs",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Peak off-state / reverse blocking current, TJ = 25°C, 400–600V",
          "symbol": "IDRM / IRRM",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "TJ = 25°C; VDRM/VRRM 400–600V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Peak off-state / reverse blocking current, TJ = 100°C, 400–600V",
          "symbol": "IDRM / IRRM",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "TJ = 100°C; VDRM/VRRM 400–600V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Peak off-state / reverse blocking current, TJ = 125°C, 400–600V",
          "symbol": "IDRM / IRRM",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1000,
          "conditions": "TJ = 125°C; VDRM/VRRM 400–600V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "RMS on-state current",
          "symbol": "IT(RMS)",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "Sxx25L: TC = 75°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Average on-state current",
          "symbol": "IT(AV)",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 16,
          "conditions": "Sxx25L: TC = 75°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Peak non-repetitive surge current, 50 Hz",
          "symbol": "ITSM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "single half cycle; f = 50Hz; TJ (initial) = 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Peak non-repetitive surge current, 60 Hz",
          "symbol": "ITSM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 350,
          "conditions": "single half cycle; f = 60Hz; TJ (initial) = 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "I2t value for fusing",
          "symbol": "I2t",
          "kind": "absolute_maximum",
          "unit": "A2s",
          "min": null,
          "typ": null,
          "max": 510,
          "conditions": "tp = 8.3 ms",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Critical rate of rise of on-state current",
          "symbol": "di/dt",
          "kind": "absolute_maximum",
          "unit": "A/μs",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "f = 60Hz; TJ = 125°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Peak gate current",
          "symbol": "IGM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 3.5,
          "conditions": "TJ = 125°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Average gate power dissipation",
          "symbol": "PG(AV)",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "TJ = 125°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to case (AC)",
          "symbol": "Rθ(J-C)",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 2.4,
          "conditions": "Sxx20L/Sxx25L (L package)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient",
          "symbol": "Rθ(J-A)",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "Sxx20L/Sxx25L",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "S4025LTP (Littelfuse) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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