component
1SMB5942B
Public Made by Adomby adom
PAKER Zener Diodes, SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "1SMB5942B",
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"category": "Diodes",
"subcategory": "Zener Diodes",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/ffdbb1a7ad4dfa9313593095ee01f3e3.pdf",
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"lbr": "1smb5942b.lbr"
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"distributor_links": {
"lcsc": "C22438310"
},
"distributor_check": {
"checked_at": "2026-10-22T06:55:37Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "K",
"type": "passive",
"description": "Cathode, the end marked with the color band; the zener is reverse-biased with this pin positive, with a nominal Vz of 51 V (48.45 V min to 53.55 V max) at IZT = 7.3 mA."
},
{
"number": "2",
"name": "A",
"type": "passive",
"description": "Anode, the end opposite the color band; the datasheet gives a 3.0 W DC power dissipation rating at TL = 75°C."
}
],
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"primary_model": "claude-sonnet-5-5",
"primary_mode": "text",
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"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The datasheet has no pin table or pin numbers. Pins 1 (cathode) and 2 (anode) follow the usual two-t; The datasheet text covers only 3 of 3 pages, so nothing is missing from the pages given. The package"
],
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"cost_usd": 0.0457,
"at": "2026-10-22T06:54:19"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/ffdbb1a7ad4dfa9313593095ee01f3e3.pdf",
"pages": 3,
"sha256": "f6f70e24fef94239",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 2,
"described": 2,
"cites_pages": true,
"refuses_to_fabricate": true
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"footprint": "viewers/footprint.html"
},
"models_3d": [
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"file": "1smb5942b.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5.3,
3.55,
2.15
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "029466277d91e9f5492556be93e46611049e07115c7913880c547afa96058ed4",
"checked": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "1smb5942b-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5.3,
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2.15
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "84c760e190623d5f076a947e35f5d0593c7a8bff50168ee43116e07aaed6870d",
"checked": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "PAKER",
"Package": "SMB",
"Category": "Diodes",
"Pins": "2"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "f6f70e24fef942393b91e55337632b1a2c8bc4acb9bd8e3829c4b1c6003d835c",
"rows": [
{
"name": "Nominal Zener Voltage",
"symbol": "VZ",
"kind": "electrical",
"unit": "V",
"min": 48.45,
"typ": 51,
"max": 53.55,
"conditions": "IZT = 7.3 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Zener Voltage Tolerance (suffix B)",
"symbol": "",
"kind": "tolerance",
"unit": "%",
"min": -5,
"typ": null,
"max": 5,
"conditions": "Suffix B indicates ±5.0% tolerance",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Zener Impedance",
"symbol": "ZZT",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": null,
"max": 70,
"conditions": "@ IZT = 7.3 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Knee Zener Impedance",
"symbol": "ZZK",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": null,
"max": 1100,
"conditions": "@ IZK = 0.25 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Leakage Current",
"symbol": "IR",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": null,
"max": 1,
"conditions": "@ VR = 38.8 V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Maximum DC Zener Current",
"symbol": "IZM",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 29,
"conditions": "DC",
"source_page": 2,
"source": "datasheet"
},
{
"name": "DC Power Dissipation",
"symbol": "PD",
"kind": "absolute_maximum",
"unit": "W",
"min": null,
"typ": null,
"max": 3,
"conditions": "TL=75°C, zero lead length, Cu-pad 5mm x 5mm",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Junction Temperature Range",
"symbol": "TJ",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Storage Temperature Range",
"symbol": "TSTG",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Zener Test Current",
"symbol": "IZT",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 7.3,
"max": null,
"conditions": "Test current for VZ and ZZT",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Knee Test Current",
"symbol": "IZK",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.25,
"max": null,
"conditions": "Test current for ZZK",
"source_page": 2,
"source": "datasheet"
}
]
}
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"author": {
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"email": "[email protected]"
},
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