component
LR123WF750MT4E
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.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownLR123WF750MT4E
UNI ROYAL Uniroyal Elec · Current Sense Resistors / Shunt Resistors · 2512
LR123WF750MT4E 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 |
|---|---|---|---|---|---|---|---|
| Resistance tolerance (code F = ±1%) | -1 | 1 | % | Part-number 7th code F | 2 | ||
| Temperature coefficient of resistance (≦±50 row) | TCR | -50 | 50 | ppm/°C | R at room temp. vs R at room temp. +100°C; LR12 3W ≦±50 row | 3 | |
| Max. rating current | 54.77 | A | LR12 3W, ≦±50 row, 1% range 1~100 mΩ | 3 | |||
| Max. overload current | 109.54 | A | LR12 3W, ≦±50 row, 1% range 1~100 mΩ | 3 | |||
| Operating temperature range | -55 | 170 | ℃ | Operating Temperature Range column of Standard Electrical Specifications | 3 | ||
| Short-time overload: permanent resistance change | ΔR | -0.5 | 0.5 | % | 5 times power rate for 5 seconds | 6 | |
| Operational life: permanent resistance change | ΔR | -1 | 1 | % | 1000 h, 1.5 h ON / 0.5 h OFF, rated or max working current (lesser), 70±2°C ambient | 6 | |
| High temp. exposure: resistance change | ΔR | -1 | 1 | % | 170±2°C for 1000 h | 6 | |
| Biased humidity: resistance change | ΔR | -0.5 | 0.5 | % | 1000 h, 85°C/85%RH, 10% of operating power | 6 | |
| Rapid change of temperature: resistance change | ΔR | -0.5 | 0.5 | % | 30 min at -55°C and 30 min at 170°C; 100 cycles | 6 | |
| Terminal bending: resistance change | ΔR | -0.5 | 0.5 | % | 2 mm, 60 s | 6 | |
| Resistance to solder heat: resistance change | ΔR | -0.5 | 0.5 | % | Dip at 260±5°C, hold 10±1 s | 6 | |
| Solderability: coverage | 95 | % | Solder at 245±3°C, dwell 2~3 s; coverage of terminal surface | 6 | |||
| Dielectric withstanding: surge current limit | 50 | mA | Applied 500 VAC for 1 minute | 6 | |||
| Nominal resistance | R | 75 | mΩ | Decoded from 8th-11th codes 750M = 750×10^-4 Ω; LR12 3W 1% range 1~100 mΩ | 2 | ||
| Rated power | P | 3 | W | Rating power at 70°C, LR12 3W | 3 |
CAD (KiCad official)
- Symbol:
LR123WF750MT4E - Footprint:
Resistor_SMD:R_2512_6332Metric - 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files:
lr123wf750mt4e-etched.step/lr123wf750mt4e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lr123wf750mt4e.step/lr123wf750mt4e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UNI ROYAL Uniroyal Elec datasheet (8 pp, sha256
9cafe18fe2eb29b6, retrieved 2026-10-18, 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).