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FRM121WJR100TM

Public Made by Adom

by adom

FOJAN 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.

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FRM121WJR100TM

FOJAN · Current Sense Resistors / Shunt Resistors · 1206

FRM121WJR100TM from FOJAN, 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 FOJAN
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
Temperature coefficient of resistance TCR -50 50 PPM/℃ Measuring points 25℃ and +125℃, reference point +25℃ 5
Resistance tolerance (J code) -5 5 % 5
Resistance range (1206, 1 W row) R 1 100 mΩ 5
Max overload current 70 A 5
Operating temperature range -55 170 °C 5
Dielectric withstanding voltage 500 V DC Stated in features list 2
Change in resistance after high temperature exposure (storage) ΔR -1 1 % T=170℃, 1000 hrs, measured 24 h after test 6
Change in resistance after low temperature exposure (storage) ΔR -0.5 0.5 % T=-55℃, 1000 hrs, measured 24 h after test 6
Change in resistance after temperature cycling ΔR -0.5 0.5 % 1000 cycles (-55℃ to 125℃), measured 24 h after test 6
Change in resistance after short time overload ΔR -0.5 0.5 % 5 × rated power for 5 s 6
Change in resistance after moisture resistance ΔR -1 1 % T=24 hours/cycle, 10 cycles 6
Change in resistance after biased humidity ΔR -0.5 0.5 % 10% rated power, 85℃, RH 85%, 1000 hrs 6
Change in resistance after load life ΔR -1 1 % 1000 h at +70℃, 1.5 h ON / 0.5 h OFF 7
Change in resistance after resistance to soldering heat ΔR -0.5 0.5 % 260±5℃ solder, 10±1 s dwell 7
Change in resistance after mechanical shock ΔR -0.5 0.5 % 100 g's, 6 ms half sine 7
Change in resistance after vibration ΔR -0.5 0.5 % 5 g's, 10-2000 Hz, 20 min, 12 cycles per X, Y, Z 7
Change in resistance after board flex ΔR -0.5 0.5 % Min 2 mm deflection, 60 s 7
Change in resistance after thermal shock ΔR -1 1 % -55℃/+155℃, 1000 cycles 7
Change in resistance after ESD ΔR -1 1 % Direct contact ±6 kV; air discharge +12 kV, +16 kV, +25 kV 7
Nominal resistance (R100 = 100 mΩ) R 100 mΩ 2
Rated power P70 1 W Power Rating at P70 5
Rated current 31 A 5

CAD (KiCad official)

  • Symbol: FRM121WJR100TM
  • Footprint: Resistor_SMD:R_1206_3216Metric
  • 3D model: 1206 (KiCad packages3D, STEP)
  • 3D model files: frm121wjr100tm-etched.step / frm121wjr100tm-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); frm121wjr100tm.step / frm121wjr100tm.glb are the bare package body.

Provenance

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

  • Datasheet: FOJAN datasheet (12 pp, sha256 13a1c74e6b23cc10, retrieved 2026-10-17, 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: 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