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JK-SMD1210-500L-12
Public Made by Adomby adom
Jinrui Electronic Materials Co Resettable Fuses, 1210. Pinout cross-checked by two models against the datasheet, 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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Contents
README
markdownJK-SMD1210-500L-12
Jinrui Electronic Materials Co · Resettable Fuses · 1210
JK-SMD1210-500L-12 from Jinrui Electronic Materials Co, in a 1210. 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 | Non-polarized PPTC terminal (tin-plated nickel-copper) in series with the protected circuit; device is rated 12 V VMAX, 50 A IMAX, 5.0 A hold and 10.0 A trip current at 25 °C. |
| 2 | 2 | passive | Second non-polarized PPTC terminal (tin-plated nickel-copper) in series with the protected circuit; interchangeable with the other terminal, with 0.001 Ω minimum and 0.012 Ω maximum initial resistance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jinrui Electronic Materials Co |
| Package | 1210 |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum voltage (VMAX), 12 V variant | VMAX | 12 | V | 3 | |||
| Maximum fault current (IMAX) | IMAX | 50 | A | 3 | |||
| Hold current (IH) | IH | 5 | A | 25℃ still air, no trip | 3 | ||
| Trip current (IT) | IT | 10 | A | 25℃ still air | 3 | ||
| Maximum time-to-trip | 2 | s | At 25.0 A time-to-trip current | 3 | |||
| Minimum resistance prior to tripping (RiMIN) | RiMIN | 0.001 | Ω | 25℃ still air, prior to tripping | 3 | ||
| Maximum resistance one hour post reflow (R1MAX) | R1MAX | 0.012 | Ω | One hour post reflow | 3 | ||
| Operating temperature | -40 | 85 | ℃ | 1 | |||
| Storage maximum ambient temperature | 40 | ℃ | Storage | 8 | |||
| Storage maximum relative humidity | 70 | % | Storage | 8 | |||
| Resistance change, passive aging | -10 | 10 | % | 85℃, 1000 hours | 5 | ||
| Resistance change, humidity aging | -5 | 5 | % | 85℃/85%RH, 100 hours | 5 | ||
| Power dissipation (PD), typical | PD | 1 | W | 25℃ still air | 3 | ||
| Hold current derating (IH) at max ambient -40℃ | IH | 7.4 | A | Maximum ambient operating temperature -40℃ | 4 | ||
| Hold current derating (IH) at max ambient -20℃ | IH | 6.67 | A | Maximum ambient operating temperature -20℃ | 4 | ||
| Hold current derating (IH) at max ambient 0℃ | IH | 5.8 | A | Maximum ambient operating temperature 0℃ | 4 | ||
| Hold current derating (IH) at max ambient 25℃ | IH | 5 | A | Maximum ambient operating temperature 25℃ | 4 | ||
| Hold current derating (IH) at max ambient 40℃ | IH | 4.4 | A | Maximum ambient operating temperature 40℃ | 4 | ||
| Hold current derating (IH) at max ambient 50℃ | IH | 3.87 | A | Maximum ambient operating temperature 50℃ | 4 | ||
| Hold current derating (IH) at max ambient 60℃ | IH | 3.53 | A | Maximum ambient operating temperature 60℃ | 4 | ||
| Hold current derating (IH) at max ambient 70℃ | IH | 3.07 | A | Maximum ambient operating temperature 70℃ | 4 | ||
| Hold current derating (IH) at max ambient 85℃ | IH | 2.4 | A | Maximum ambient operating temperature 85℃ | 4 | ||
| Resistance change, thermal shock | -30 | % | MIL-STD-202 Method 107G, +85℃/-40℃, 20 times | 5 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | tin | Terminal Materials Tin-Plated Nickle-copper | 5 |
CAD (KiCad official)
- Symbol:
JK-SMD1210-500L-12 - Footprint:
Fuse:Fuse_1210_3225Metric - 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files:
jk-smd1210-500l-12-etched.step/jk-smd1210-500l-12-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);jk-smd1210-500l-12.step/jk-smd1210-500l-12.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Jinrui Electronic Materials Co datasheet (8 pp, sha256
df807361c1a52000, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-5-5(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).