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1N4370

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Microchip Tech Zener Diodes, DO-35. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

componentdiodes1n4370factory-2.0.0extractor-text

Verified 1N4370

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier lcsc, 2 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: 1N4370 · DO-35 · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: all 2 pin names found in the 3-page datasheet
  • •distributor (warn): no ['digikey'] number
  • ✓family: D_DO-35_SOD27_P7.62mm_Horizontal
  • ✓files: 6 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-39m1soqf/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 1 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 1 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ 1n4370.kicad_sym✓ 1n4370.kicad_mod✓ 1n4370.step
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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

markdown

1N4370

Microchip Tech · Zener Diodes · DO-35

1N4370 from Microchip Tech, in a DO-35. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 K passive Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package DO-35
Category Diodes
Pins 2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Zener voltage tolerance (no suffix, standard) VZ -10 10 % Standard tolerance, no suffix letter (A = ±5%, C = ±2%, D = ±1%) 2
Maximum reverse current @25°C IR 100 μA VR = 1 V, 25°C 2
Maximum reverse current @+150°C IR 200 μA VR = 1 V, +150°C 2
Maximum zener impedance ZZT 30 Ω @ IZT = 20 mA, 60 Hz ac at 10% IZT (note 3) 2
Maximum zener current IZM 150 mA Note 4: allowance for power dissipation of 400 mW 2
Operating and storage temperature Tj/Tstg -65 175 °C Operating and storage temperature 1
Steady-state power P 0.5 W TL < 50°C, 3/8 inch (10 mm) from body; 0.48 W at TA < 25°C on FR4 PC board 1
Solder temperature 260 °C 10 s (max) 1
Nominal zener voltage VZ 2.4 V @ IZT = 20 mA (note 2: measured 20 s after DC test current) 2
Typical temperature coefficient of zener voltage αVZ -0.085 %/°C Typical, @ IZT = 20 mA 2
Thermal resistance junction to lead RθJL 250 °C/W 3/8 inch (10 mm) lead length from body 1
Thermal resistance junction to ambient RθJA 310 °C/W Mounted on FR4 PC board (1 oz Cu), 4 mm² copper pads, track width 1 mm, length 25 mm 1
Forward voltage VF 1.1 V @ IF = 200 mA 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing PC C) 3/8” FROM BODY or NOMINAL ZENER VOLTAGE (VOLTS) TA on FR4 PC BOARD 2
contacts tin • TERMINALS: Tin-Lead or RoHS Compliant annealed matte-Tin plating solderable per MIL￾STD-750, method 2026 1

CAD (KiCad official)

  • Symbol: 1N4370
  • Footprint: Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal
  • 3D model: DO-35 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (3 pp, sha256 c7e4020fcb968bf9, retrieved 2026-10-31, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary cathode-band convention (convention), consensus off (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF