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WSTM2512QLR300FYR

Public Made by Adom

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Littelfuse 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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WSTM2512QLR300FYR

Littelfuse · Current Sense Resistors / Shunt Resistors · 2512

WSTM2512QLR300FYR from Littelfuse, 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 Littelfuse
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 value (nominal) Ro 300 mΩ 4
Resistance tolerance Rt -1 1 % Tolerance code F = ±1% 2
TCR TCR -50 50 ppm / ºC Q = ±50 ppm/°C (TCR code Q) 2
Power rating 2 W 2
Resistance change, short time overload ΔR/R -1 1 % IEC60115-1 4.13; applied voltage 2.5X rated power, 5 s, 25 ± 2 °C; limit printed ±(1.0%+0.5mΩ) 6
Resistance change, moisture load life ΔR/R -2 2 % IEC60115-1 4.25; 60 ± 2 °C, RH 95%, rated voltage, 1,000 h with 90 min ON / 30 min OFF; limit printed ±(2.0%+0.5mΩ) 6
Resistance change, temperature cycle (thermal shock) ΔR/R -1 1 % IEC60115-1 4.19; 100 cycles, -55 ± 3 °C (30 min) / +155 ± 3 °C (30 min); limit printed ±(1.0%+0.5mΩ) 6
Resistance change, resistance to solder heat ΔR/R -1 1 % IEC60115-1 4.18; through reflow, 3 reflow cycles; limit printed ±(1.0%+0.5mΩ) 6
Resistance change, high temperature exposure ΔR/R -1 1 % IEC60115-1 4.25; maximum rated operational temperature, 1,000 h, no electrical load; limit printed ±(1.0%+0.5mΩ) 6
Resistance change, low temperature storage ΔR/R -1 1 % IEC60115-1 4.25; -55 ± 2 °C, 1,000 h; limit printed ±(1.0%+0.5mΩ) 6
Resistance change, load life at 70 °C ΔR/R -2 2 % IEC60115-1 4.25; Vtest = Vmax, 70 ± 2 °C, 1,000 h with 90 min ON / 30 min OFF; limit printed ±(2.0%+0.5mΩ) 6
Resistance change, substrate bending ΔR/R -1 1 % IEC60115-1 4.33; span 90 mm, bend width 2 mm, glass-epoxy board 1.60 mm; limit printed ±(1.0%+0.5mΩ) 6
Resistance change, mechanical shock ΔR/R -1 1 % IEC60115-1 4.21; force 100G, duration 6 ms; limit printed ±(1.0%+0.5mΩ) 6
Solder coverage (solderability) 95 % IEC60115-1 4.17; dipped in molten solder 3 ± 1 s at 245 ± 5 °C; new solder coverage 6
Storage temperature (product storage environment) 5 35 °C Storage environment, products stored under these conditions 5
Storage relative humidity (product storage environment) 45 85 % relative humidity Storage environment, products stored under these conditions 5

CAD (KiCad official)

  • Symbol: WSTM2512QLR300FYR
  • Footprint: Resistor_SMD:R_2512_6332Metric
  • 3D model: 2512 (KiCad packages3D, STEP)
  • 3D model files: wstm2512qlr300fyr-etched.step / wstm2512qlr300fyr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); wstm2512qlr300fyr.step / wstm2512qlr300fyr.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse datasheet (9 pp, sha256 f6cd93f44f6bb289, 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