component
LR122WF700MT4E
Public Made by Adomby adom
UNI-ROYAL(Uniroyal Elec) Current Sense Resistors / Shunt Resistors, 2512. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
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LR122WF700MT4E
UNI-ROYAL(Uniroyal Elec) · Current Sense Resistors / Shunt Resistors · 2512
LR122WF700MT4E from UNI-ROYAL(Uniroyal Elec), in a 2512. 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 | UNI-ROYAL(Uniroyal Elec) |
| Package | 2512 |
| 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 (TCR) | TCR | -50 | 50 | ppm/°C | t1=+25°C, t2=125°C | 4 | |
| Resistance tolerance | -1 | 1 | % | F = ±1% (7th code of part number) | 2 | ||
| Short-time overload resistance change | ΔR | -0.5 | 0.5 | % | 5 times rated power for LR12-2W, 5 seconds | 4 | |
| Load life resistance change | ΔR | -1 | 1 | % | 1000 h at rated or max working current (whichever less), 1.5 h ON / 0.5 h OFF, 70±2℃ ambient | 4 | |
| High temperature exposure resistance change | ΔR | -1 | 1 | % | 155±2℃ for 1000 H (MIL-STD-202 108A) | 4 | |
| Biased humidity resistance change | ΔR | -0.5 | 0.5 | % | 1000 h, 85℃/85%RH, 10% of operating power | 4 | |
| Rapid change of temperature resistance change | ΔR | -0.5 | 0.5 | % | 30 min at -55℃ and 30 min at 155℃; 100 cycles | 4 | |
| Terminal bending resistance change | ΔR | -0.5 | 0.5 | % | 2 mm, 10 s | 4 | |
| Resistance to solder heat resistance change | ΔR | -0.5 | 0.5 | % | Dip at 260±5℃ held 10±1 seconds | 4 | |
| Solderability coverage | 95 | % | Solder 245±3℃, dwell 2~3 seconds; coverage of new surface | 4 | |||
| Surge current limit (dielectric withstanding test) | 50 | mA | Applied 500 VAC for 1 minute | 4 | |||
| Rated power | P | 2 | W | LR12 2W rating, continuous load at 70℃ ambient | 2 | ||
| Nominal resistance (decoded from part number) | R | 70 | mΩ | Part number codes 8th-11th = 700, M (10^-4) = 0.07 Ω | 2 | ||
| Ambient temperature for rated power | 70 | ℃ | Continuous load; derate above 70℃ per Figure 1 | 3 | |||
| Recommended storage temperature | 15 | 35 | ℃ | Recommended warehouse storage | 7 | ||
| Recommended storage humidity | 25 | 75 | %RH | Recommended warehouse storage | 7 | ||
| Reflow temperature Tp (peak) | Tp | 260 | ℃ | Pb-free reflow profile; time within +0/-5℃ of peak 10 s | 5 | ||
| Reflow time above liquidus | TL | 217 | ℃ | Time above TL 60-150 seconds | 5 | ||
| Reflow ramp-up rate | 3 | ℃/s | Average, Ts max to Tp | 5 | |||
| Reflow ramp-down rate | 6 | ℃/s | Ramp-down from peak | 5 | |||
| Allowed reflow cycles | 2 | times | Reflow soldering | 5 |
CAD (KiCad official)
- Symbol:
LR122WF700MT4E - Footprint:
Resistor_SMD:R_2512_6332Metric - 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files:
lr122wf700mt4e-etched.step/lr122wf700mt4e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lr122wf700mt4e.step/lr122wf700mt4e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UNI-ROYAL(Uniroyal Elec) datasheet (7 pp, sha256
e01cdf7929676065, retrieved 2026-10-17, tier: lcsc) - 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).