component
FRM121WJR020TM
Public Made by Adomby 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.
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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README
markdownFRM121WJR020TM
FOJAN · Current Sense Resistors / Shunt Resistors · 1206
FRM121WJR020TM 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 |
|---|---|---|---|---|---|---|---|
| Resistance (nominal, code R020) | R | 20 | mΩ | Part-number resistance code R020 = 20 mΩ (marking rule: R = decimal point, 'R001=1mΩ'); Kelvin four-terminal measurement | 2 | ||
| Resistance range (1206, 1 W row) | 1 | 100 | mΩ | Type 1206, power rating 1 W, 'Resistance Range (mΩ)' column | 5 | ||
| Tolerance (code J) | -5 | 5 | % | Part-number tolerance letter J = ±5% | 2 | ||
| Temperature coefficient of resistance (T.C.R.) | TCR | -50 | 50 | PPM/℃ | Type 1206, 1 W row; ±50 PPM/℃; measured at 25 ℃ and +125 ℃, reference +25 ℃ | 5 | |
| Power rating at P70 | P70 | 1 | W | Type 1206, 1 W row, 'Power Rating at P70 (W)' | 5 | ||
| Rated current | 31 | A | Type 1206, 1 W row, 'Rated Current (A)' column | 5 | |||
| Max overload current | 70 | A | Type 1206, 1 W row, 'Max overload Current (A)' column | 5 | |||
| Operating temperature range | -55 | 170 | ℃ | Type 1206, 1 W row, 'Operating Temperature (°C)' -55℃ to 170℃ | 5 | ||
| Hand soldering temperature | 350 | ℃ | Iron temperature 350±10℃, hand soldering time less than 3 s; avoid iron tip touching resistor body | 9 | |||
| Resistance change, high temperature exposure (storage) | △R | -1 | 1 | % | T=170℃, 1000 h, measured 24 h after test | 6 | |
| Resistance change, low temperature exposure (storage) | △R | -0.5 | 0.5 | % | T=-55℃, 1000 h, measured 24 h after test | 6 | |
| Resistance change, temperature cycling | △R | -0.5 | 0.5 | % | 1000 cycles, -55℃ to 125℃, measured 24 h after test | 6 | |
| Resistance change, short time overload | △R | -0.5 | 0.5 | % | 5 X rated power for 5 s | 6 | |
| Resistance change, moisture resistance | △R | -1 | 1 | % | 24 h per cycle, 10 cycles, notes steps 7a & 7b not required | 6 | |
| Resistance change, biased humidity | △R | -0.5 | 0.5 | % | 10% rated power, 85℃, RH 85%, 1000 h, measured 24 h after test | 6 | |
| Resistance change, load life | △R | -1 | 1 | % | 1000 h at +70℃, 1.5 h ON / 0.5 h OFF, measured 24 h after test | 7 | |
| Resistance change, resistance to soldering heat | △R | -0.5 | 0.5 | % | 260±5℃ solder, 10±1 s dwell | 7 | |
| Resistance change, mechanical shock | △R | -0.5 | 0.5 | % | 100 g, 6 ms half sine pulse, 3 shocks in each of six directions | 7 | |
| Resistance change, vibration | △R | -0.5 | 0.5 | % | 5 g, 10-2000 Hz, 20 min per cycle, 12 cycles in X, Y, Z | 7 | |
| Resistance change, board flex | △R | -0.5 | 0.5 | % | Min 2 mm deflection, 60 s | 7 | |
| Resistance change, thermal shock | △R | -1 | 1 | % | -55℃/+155℃, 1000 cycles | 7 | |
| Resistance change, ESD | △R | -1 | 1 | % | Direct contact ±6 kV; air discharge +12 kV, +16 kV, +25 kV | 7 |
CAD (KiCad official)
- Symbol:
FRM121WJR020TM - Footprint:
Resistor_SMD:R_1206_3216Metric - 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files:
frm121wjr020tm-etched.step/frm121wjr020tm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);frm121wjr020tm.step/frm121wjr020tm.glbare 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, primarytwo-terminal convention(convention), consensusoff(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).