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LR123WF130LT4E

Public Made by Adom

by 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.

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LR123WF130LT4E

UNI ROYAL Uniroyal Elec · Current Sense Resistors / Shunt Resistors · 2512

LR123WF130LT4E 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
Tolerance -1 1 % Tolerance code F = ±1% (7th code of LR123WF130LT4E) 2
Temperature coefficient (TCR) -50 50 PPM/℃ t1 +25℃ or specified room temperature; t2 test temperature 125℃ 4
Resistance range (3W) 3 350 mΩ LR12 3W variant, 3~350mΩ range; this part is 130mΩ, within range 3
Rated power 3 W 3W variant; continuous load operation 4
Rated ambient temperature for full rated power 70 ℃ Full rated power at ambient 70℃; derate above 70℃ per Figure 1 (curve not extracted) 4
Short-time overload resistance change ΔR -0.5 0.5 % LR12-3W: 4 times rated power for 5 seconds 4
Load life resistance change ΔR -1 1 % 1000 hours 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 % 85℃/85%RH, 1000 hours, 10% of operating power; measured at 24±4 h after test 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℃ and hold 10±1 seconds 4
Solderability coverage 95 % Solder temperature 245±3℃; dwell time 2~3 seconds 4
Surge current limit in dielectric withstanding test 50 mA Applied 500 VAC for 1 minute 4

CAD (KiCad official)

  • Symbol: LR123WF130LT4E
  • Footprint: Resistor_SMD:R_2512_6332Metric
  • 3D model: 2512 (KiCad packages3D, STEP)
  • 3D model files: lr123wf130lt4e-etched.step / lr123wf130lt4e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lr123wf130lt4e.step / lr123wf130lt4e.glb are the bare package body.

Provenance

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

  • Datasheet: UNI ROYAL Uniroyal Elec datasheet (6 pp, sha256 697e24f2047069dc, retrieved 2026-10-20, tier: lcsc)
  • 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