component
1N4744ATR
Public Made by Adomby adom
onsemi Zener Diodes, DO-41. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"category": "Diodes",
"subcategory": "Zener Diodes",
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"distributor_links": {
"lcsc": "C556428",
"digikey": "1N4744AFSTR-ND",
"mouser": "512-1N4744ATR"
},
"distributor_check": {
"checked_at": "2026-10-22T10:52:16Z",
"source": "Component Ocean /api/assign-pns",
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"pn": "1N4744AFSTR-ND",
"status": "found",
"lifecycle": "Active"
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"pn": "512-1N4744ATR",
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"pins": [
{
"number": "1",
"name": "K",
"type": "passive",
"description": "Cathode lead, marked by the cathode identification band on the DO-41 body; for the 1N4744A the nominal Zener voltage is 15 V at IZT = 17 mA."
},
{
"number": "2",
"name": "A",
"type": "passive",
"description": "Anode lead at the opposite end of the DO-41 body from the cathode band; Ptot is 1300 mW provided the leads 4 mm from the case are kept at ambient temperature."
}
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"primary_model": "claude-sonnet-5-5",
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"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The supplied datasheet is a Vishay document (1N4728A to 1N4764A), but the requested MPN is from onse; The datasheet gives no pin numbers or anode label. It only shows a 'Cathode Identification' band on ; The ordering code is listed as '-series-TR' (5000 per 13\" reel). The datasheet does not give a separ"
],
"pages_sent": 4,
"cost_usd": 0.0597,
"at": "2026-10-22T10:51:11"
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"url": "https://datasheet.lcsc.com/datasheet/pdf/c6cddfd3bbb00d8116b5628fe20592ff.pdf",
"pages": 4,
"sha256": "7bbd9a9221a814f6",
"source_tier": "lcsc"
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"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
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"cites_pages": true,
"refuses_to_fabricate": true
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"file": "1n4744atr.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "body on z = 0, through-hole leads below",
"extents_mm": [
10.96,
2.72,
5.71
],
"zmin_mm": -2.5,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "c3e23d4b276811b74eecb329bd4480209ad3dbc8cf6e6e3f2a5b542c5ca343c1",
"checked": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "onsemi",
"Package": "DO-41",
"Category": "Diodes",
"Pins": "2"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "7bbd9a9221a814f6074cff370edac6bbe9d16300768aa63277ea9885a1d01abe",
"rows": [
{
"name": "Zener voltage tolerance",
"symbol": "VZ",
"kind": "tolerance",
"unit": "%",
"min": -5,
"typ": null,
"max": 5,
"conditions": "Standard Zener voltage tolerance",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Nominal Zener voltage",
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"min": null,
"typ": 15,
"max": null,
"conditions": "at IZT1 = 17 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Test current",
"symbol": "IZT1",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 17,
"max": null,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Test current (knee)",
"symbol": "IZT2",
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"unit": "mA",
"min": null,
"typ": 0.25,
"max": null,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Reverse leakage current",
"symbol": "IR",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": null,
"max": 5,
"conditions": "at VR = 11.4 V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Dynamic resistance",
"symbol": "ZZT",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": null,
"max": 14,
"conditions": "at IZT1, f = 1 kHz",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Dynamic resistance (knee)",
"symbol": "ZZK",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": null,
"max": 700,
"conditions": "at IZT2, f = 1 kHz",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Surge current",
"symbol": "IR",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 304,
"conditions": "tp = 10 ms",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Regulator current",
"symbol": "IZM",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 61,
"conditions": "Electrodes at 4 mm from case kept at ambient temperature",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Forward voltage",
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"min": null,
"typ": null,
"max": 1.2,
"conditions": "IF = 200 mA",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Power dissipation",
"symbol": "Ptot",
"kind": "absolute_maximum",
"unit": "mW",
"min": null,
"typ": null,
"max": 1300,
"conditions": "Leads at 4 mm from case kept at ambient temperature, Tamb = 25 °C",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Junction temperature",
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"kind": "absolute_maximum",
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"min": null,
"typ": null,
"max": 175,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Storage temperature range",
"symbol": "Tstg",
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"unit": "°C",
"min": -65,
"typ": null,
"max": 175,
"conditions": "",
"source_page": 1,
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{
"name": "Thermal resistance junction to ambient air",
"symbol": "RthJA",
"kind": "thermal",
"unit": "K/W",
"min": null,
"typ": null,
"max": 110,
"conditions": "Leads at 4 mm from case kept at ambient temperature",
"source_page": 1,
"source": "datasheet"
}
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