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CMFB 503F3950

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Nanjing Shiheng Elec NTC Thermistors, 0805. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs cmfb-503f3950: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 4d ago
viewers cmfb-503f3950: viewers · Ray 1mo ago
cmfb-503f3950-etched.fit.json cmfb-503f3950: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 4d ago
cmfb-503f3950-etched.glb cmfb-503f3950: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 4d ago
cmfb-503f3950-etched.step cmfb-503f3950: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 4d ago
cmfb-503f3950.glb Publish 0.1.0 · Ray 1mo ago
cmfb-503f3950.kicad_mod Publish 0.1.0 · Ray 1mo ago
cmfb-503f3950.kicad_sym Publish 0.1.0 · Ray 1mo ago
cmfb-503f3950.lbr Publish 0.1.0 · Ray 1mo ago
cmfb-503f3950.step Publish 0.1.0 · Ray 1mo ago
package.json cmfb-503f3950: manufacturer 'Nanjing Shiheng Elec' (was 'Nanjing Shiheng Elec CMFB 503F3950': the MPN had been folded in) · Ray 19d ago
page.json cmfb-503f3950: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 15h ago
README.md cmfb-503f3950: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 16d ago

CMFB 503F3950

Nanjing Shiheng Elec · NTC Thermistors · 0805

CMFB 503F3950 from Nanjing Shiheng Elec, in a 0805. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1 passive External electrode terminal 1 of the two-terminal NTC thermistor. Non-polarized; either terminal may be used as input or output. Resistance between terminals is ~50 kΩ at 25 °C, decreasing with temperature per the R-T table.
2 2 passive External electrode terminal 2 of the two-terminal NTC thermistor. Non-polarized; interchangeable with terminal 1. Combined with terminal 1 forms the NTC resistance element (50 kΩ ±1% @ 25 °C, B = 3950 K).

Key specifications

Parameter Value
Manufacturer Nanjing Shiheng Elec
Package 0805
Category Sensor
Pins 2

Ordering variants

Same part, different packaging or reel option.

  • CMFB 503F3950B

CAD (KiCad official)

  • Symbol: CMFB 503F3950
  • Footprint: Resistor_SMD:R_0805_2012Metric
  • 3D model: 0805 (KiCad packages3D, STEP)
  • 3D model files: cmfb-503f3950-etched.step / cmfb-503f3950-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cmfb-503f3950.step / cmfb-503f3950.glb are the bare package body.

Provenance

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

  • Datasheet: Nanjing Shiheng Elec datasheet (13 pp, sha256 b97d3c412e07c2b3, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF