component
MMBZ5246B
Public Made by Adomby adom
Changjing Zener Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"slug": "mmbz5246b",
"title": "MMBZ5246B",
"brief": "Changjing Zener Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
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"package": "SOT-23",
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"category": "Diodes",
"subcategory": "Zener Diodes",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590224155338973184",
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"lbr": "mmbz5246b.lbr"
},
"distributor_links": {
"lcsc": "C193738"
},
"distributor_check": {
"checked_at": "2026-10-18T14:27:44Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
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"name": "A",
"type": "passive",
"description": "Zener anode, the side of the diode symbol drawn with the triangle on the SOT-23 pin diagram; the MMBZ5246B has a nominal VZ of 16 V at IZT = 7.8 mA."
},
{
"number": "2",
"name": "NC",
"type": "unconnected",
"description": "Not connected; the SOT-23 pin diagram shows pin 2 as an open terminal with no connection to the diode."
},
{
"number": "3",
"name": "K",
"type": "passive",
"description": "Zener cathode, the bar side of the diode symbol; it is positive relative to the anode in reverse (zener) operation, and the part is rated for 300 mW power dissipation."
}
],
"provenance": {
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"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text+vision",
"consensus_model": "claude-opus-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
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"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 5,
"cost_usd": 0.1804,
"at": "2026-10-18T14:27:31"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590224155338973184",
"pages": 5,
"sha256": "aaf766a75da5fd05",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 3,
"described": 3,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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3,
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],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "mmbz5246b-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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"zmin_mm": 0,
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"footprint_binding": "identity",
"sha256": "51700d2ead6c164579531085066067b7f5a413af033a0a4362085dbac82aef43",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Changjing",
"Package": "SOT-23",
"Category": "Diodes",
"Pins": "3"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "aaf766a75da5fd056b5e3f50680708f6637df8d086b724ec09cf779216e1ce78",
"rows": [
{
"name": "Zener voltage",
"symbol": "VZ",
"kind": "electrical",
"unit": "V",
"min": 15.2,
"typ": 16,
"max": 16.8,
"conditions": "Nominal 16 V (KJ1 row); IZT = 7.8 mA; short pulse test (note 1)",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Maximum Zener impedance",
"symbol": "ZZT",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": null,
"max": 17,
"conditions": "@ IZT = 7.8 mA; f = 1kHz (note 2)",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Maximum Zener impedance",
"symbol": "ZZK",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": null,
"max": 600,
"conditions": "@ IZK = 0.25 mA; f = 1kHz (note 2)",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Maximum reverse leakage current",
"symbol": "IR",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 0.1,
"conditions": "@ VR = 12 V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Power dissipation",
"symbol": "PD",
"kind": "absolute_maximum",
"unit": "mW",
"min": null,
"typ": null,
"max": 300,
"conditions": "Ta = 25℃ unless otherwise specified",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Junction temperature",
"symbol": "Tj",
"kind": "absolute_maximum",
"unit": "℃",
"min": null,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Storage temperature range",
"symbol": "TSTG",
"kind": "absolute_maximum",
"unit": "℃",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Forward voltage",
"symbol": "VF",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 0.9,
"max": null,
"conditions": "@ IF = 10 mA",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Thermal resistance, junction to ambient",
"symbol": "R JA",
"kind": "thermal",
"unit": "℃/W",
"min": null,
"typ": 417,
"max": null,
"conditions": "",
"source_page": 1,
"source": "datasheet"
}
]
}
},
"variants": [],
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"discovery_triggers": [
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],
"discovery_pitch": "MMBZ5246B (Changjing) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
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