component

LRAN12SFTR040

Public Made by Adom

by adom

NCT Current Sense Resistors/Shunt Resistors, 1206. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

componentresistorslran12sftr040factory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray
viewers lran12sftr040: viewers · Ray
lran12sftr040-etched.glb Publish 0.1.0 · Ray
lran12sftr040-etched.step lran12sftr040: factory component page (tier=lcsc) · Ray
lran12sftr040-hero.glb lran12sftr040: hero GLB from the etched model (keeps the MPN mark) · Ray
lran12sftr040-hero.overlay.json Publish 0.1.0 · Ray
lran12sftr040.glb Publish 0.1.0 · Ray
lran12sftr040.kicad_mod Publish 0.1.0 · Ray
lran12sftr040.kicad_sym lran12sftr040: KiCad Device:R symbol instead of a box (two-terminal passive) · Ray
lran12sftr040.lbr lran12sftr040: KiCad Device:R symbol instead of a box (two-terminal passive) · Ray
lran12sftr040.step Publish 0.1.0 · Ray
package.json Publish 0.1.0 · Ray
page.json Set visibility: public · Ray
README.md Publish 0.1.0 · Ray

LRAN12SFTR040

NCT · Current Sense Resistors/Shunt Resistors · 1206

LRAN12SFTR040 from NCT, in a 1206. 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 1 passive Terminal 1 of an unpolarised resistor; either orientation.
2 2 passive Terminal 2 of an unpolarised resistor; either orientation.

Key specifications

Parameter Value
Manufacturer NCT
Package 1206
Category Resistors
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
Insulation resistance 100 MΩ 100 VDC applied 1 min between electrodes and protective layer / substrate 9
Solderability (new solder area on electrodes) 95 % Immersed 3 ±1 s in 245 ±5 °C solder bath 9
Resistance tolerance (F) -1 1 % Tolerance letter F = 1% (part-number table) 3
Temperature coefficient of resistance TCR -50 50 ppm/°C 4
Resistance change, short time overload -0.5 0.5 % 5 s overload at 5x rated power, then 24 h rest 8
Resistance change, biased humidity -0.5 0.5 % 85 ±5 °C, 85 ±5 %RH, rated current 1000 h (90 min ON / 30 min OFF) 8
Resistance change, temperature cycling -0.5 0.5 % -55 °C to +125 °C, 1000 cycles 8
Resistance change, low temperature exposure (storage) -0.5 0.5 % -55 ±2 °C, 1000 h, then 1 h rest 8
Resistance change, high temperature exposure (storage) -1 1 % 170 °C oven, 1000 h, then 1 h rest 9
Resistance change, load life -1 1 % 70 ±2 °C, rated current, 1000 h (90 min ON / 30 min OFF) 9
Resistance change, resistance to solder heat -0.5 0.5 % 260 ±5 °C solder bath, 10 ±1 s 9
Resistance change, resistance to solvent -0.5 0.5 % Isopropanol 20-25 °C, 60 ±5 s 9
Resistance change, joint strength of solder -0.5 0.5 % Bend test on test board under load 9
Nominal resistance (this MPN, R040) R 40 mΩ 3
Rated power (0.5W series, 40mΩ-100mΩ) P 0.5 W Derate above 70 °C per power derating curve (section 7) 4
Maximum rated current (0.5W, 40mΩ-100mΩ) 3.54 A I = SQRT(P/R) 4
Maximum overload current (0.5W, 40mΩ-100mΩ) 7.91 A 4
Operating temperature range -55 170 °C Operating temperature range (使用温度范围) 4
Storage temperature 5 35 °C Sealed storage, 2 years shelf life 11
Storage relative humidity 40 75 %RH Sealed storage, 2 years shelf life 11

CAD (KiCad official)

  • Symbol: LRAN12SFTR040
  • Footprint: Resistor_SMD:R_1206_3216Metric
  • 3D model: 1206 (KiCad packages3D, STEP)
  • 3D model files: lran12sftr040-etched.step / lran12sftr040-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lran12sftr040.step / lran12sftr040.glb are the bare package body.

Provenance

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

  • Datasheet: NCT datasheet (12 pp, sha256 9468aafd42725899, retrieved 2026-10-20, 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: parts-factory 2.0.0 / extract_pins, primary two-terminal 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