MDB8S

{
  "schema_version": 1,
  "type": "component",
  "slug": "mdb8s",
  "title": "MDB8S",
  "brief": "onsemi Bridge Rectifiers, TSSOP-4(5.0x4.4). 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",
    "diodes",
    "mdb8s",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MDB8S",
    "manufacturer": "onsemi",
    "package": "TSSOP-4(5.0x4.4)",
    "pin_count": 4,
    "category": "Diodes",
    "subcategory": "Bridge Rectifiers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590911187477340160",
    "parts": {
      "symbol": "mdb8s.kicad_sym",
      "footprint": "mdb8s.kicad_mod",
      "model_3d": "mdb8s-hero.glb",
      "model_3d_plain": "mdb8s-etched.glb",
      "model_3d_step": "mdb8s-etched.step",
      "model_3d_step_plain": "mdb8s.step",
      "lbr": "mdb8s.lbr"
    },
    "distributor_links": {
      "lcsc": "C895501",
      "digikey": "MDB8SFSTR-ND",
      "mouser": "512-MDB8S"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T00:32:33Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MDB8SFSTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "512-MDB8S",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "AC line input 1; one of two single-phase AC inputs to the bridge rectifier, rated up to VRMS = 560 V for MDB8S."
      },
      {
        "number": "2",
        "name": "+",
        "type": "power_out",
        "description": "DC positive output; rectified DC rail, VRRM = 800 V, IF(AV) = 1.0 A, IFSM = 30 A, VF max 1.1 V per diode at IF = 1 A."
      },
      {
        "number": "3",
        "name": "3",
        "type": "passive",
        "description": "AC line input 2; one of two single-phase AC inputs to the bridge rectifier, rated up to VRMS = 560 V for MDB8S."
      },
      {
        "number": "4",
        "name": "-",
        "type": "power_in",
        "description": "DC negative output (GND/return); negative rail of the rectified output, connects to circuit ground."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-sonnet-4-6",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin-to-function assignment (which diagonal carries ~ vs. +/−) is inferred from the small bridge sche",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 5,
        "cost_usd": 0.1721,
        "at": "2026-10-27T00:31:41"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590911187477340160",
        "pages": 5,
        "sha256": "0a5979023babfdda",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mdb8s.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.56,
          5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b92def9846201629a7d805f7aad1a35d6ded63c038d5d9c835b6579ed7ce9a42",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mdb8s-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.56,
          5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "64ef89a3418d9ce0077917a3a8ce5f6928710adc69496ce61381f0757ea8ea35",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "TSSOP-4(5.0x4.4)",
      "Category": "Diodes",
      "Pins": "4"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "0a5979023babfddafa801bb12ead05a798dffbe20aa34959c85836e1c4832171",
      "rows": [
        {
          "name": "Maximum Repetitive Peak Reverse Voltage",
          "symbol": "VRRM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 800,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum RMS Voltage",
          "symbol": "VRMS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 560,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum DC Blocking Voltage",
          "symbol": "VDC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 800,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Average Rectified Forward Current",
          "symbol": "IF(AV)",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Note 1: 60 Hz sine wave, R-load, TA = 25°C on FR-4 PCB",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Peak Forward Surge Current",
          "symbol": "IFSM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "Note 2: 60 Hz sine wave, non-repetitive 1 cycle peak, TJ = 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "I2t Rating for fusing",
          "symbol": "I2t",
          "kind": "absolute_maximum",
          "unit": "A2S",
          "min": null,
          "typ": null,
          "max": 3.735,
          "conditions": "t < 8.3 ms",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Forward Voltage",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.1,
          "conditions": "IF = 1 A, pulse measurement, per diode",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Reverse Current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "At VRRM, pulse measurement, per diode",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction to Ambient, dual dice measurement",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "Measurement with dual dice, FR-4 PCB per Note 3",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction to Ambient, single die measurement",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "Measurement with single die, FR-4 PCB per Note 3",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Characterization, Junction to Lead",
          "symbol": "JL",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 57,
          "max": null,
          "conditions": "Pin 2",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Characterization, Junction to Lead",
          "symbol": "JL",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "Pin 1, 3, 4",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mdb8s"
  ],
  "discovery_pitch": "MDB8S (onsemi) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "mdb8s.kicad_sym",
    "mdb8s.kicad_mod",
    "mdb8s.glb",
    "mdb8s.step",
    "mdb8s.lbr",
    "docs/hero.png",
    "docs/mdb8s-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mdb8s-hero.glb",
    "mdb8s-hero.overlay.json",
    "mdb8s-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}