component
WK73S2BTTD4R42F
Public Made by Adomby adom
KOA Speer Elec Chip Resistor - Surface Mount, 0612. 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
markdownWK73S2BTTD4R42F
KOA Speer Elec · Chip Resistor - Surface Mount · 0612
WK73S2BTTD4R42F from KOA Speer Elec, in a 0612. 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 | KOA Speer Elec |
| Package | 0612 |
| 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 | -1 | 1 | % | Tolerance F (±1%) per MPN part-numbering table | 1 | ||
| T.C.R. | -100 | 100 | x10-6/K | 2 | |||
| Operating temperature range | -55 | 155 | °C | 2 | |||
| Overload (short time) | -2 | 0.2 | 2 | % | Rated voltage x2.0 for 5 seconds (WK73S2B 1W) | 2 | |
| Resistance to solder heat | -1 | 0.2 | 1 | % | 260°C ± 5°C, 10 seconds ± 1 second | 2 | |
| Bending test | -1 | 0.1 | 1 | % | Holding point 90mm, Bending 1 time, Bending 5mm | 2 | |
| Rapid change of temperature | -2 | 1 | 2 | % | -55°C (30 minutes), +125°C (30 minutes), 1000 cycles | 2 | |
| Moisture resistance | -2 | 0.2 | 2 | % | 40°C ± 2°C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle | 2 | |
| Endurance at 70°C | -2 | 0.2 | 2 | % | 70°C ± 2°C or rated terminal part temperature ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle | 2 | |
| High temperature exposure | -1 | 0.2 | 1 | % | +155°C, 1000 hours | 2 | |
| Rated power | 1 | W | WK73S2B 1.0W at rated ambient 70°C, derate above 70°C per curve | 1 |
CAD (KiCad official)
- Symbol:
WK73S2BTTD4R42F - Footprint:
Resistor_SMD:R_0612_1632Metric - 3D model: 0612 (KiCad packages3D, STEP)
- 3D model files:
wk73s2bttd4r42f-etched.step/wk73s2bttd4r42f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wk73s2bttd4r42f.step/wk73s2bttd4r42f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KOA Speer Elec datasheet (2 pp, sha256
fe150d6ad5fb570b, retrieved 2026-10-26, 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).