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SF-1206S125-2

BOURNS · Disposable Fuses · 1206

SF-1206S125-2 from BOURNS, in a 1206. 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 fuse; either orientation.
2 2 passive Terminal 2 of an unpolarised fuse; either orientation.

Key specifications

Parameter Value
Manufacturer BOURNS
Package 1206
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
Clearing time at 250 % of rated current 5 s Clearing time at 25 °C ambient, 250 % of rated current (series characteristic) 1
Clearing time at 100 % of rated current 4 h Clearing time at 25 °C ambient, 100 % of rated current (series characteristic) 1
Resistance tolerance -25 25 % Resistance measured with ≤10 % rated current at 25 °C ambient 1
Resistance 0.09 Ω Measured with ≤10 % rated current at 25 °C ambient 1
Rated current 1.25 A 1
Rated voltage 63 VDC Rated voltage for SF-1206S125-2 1
Interrupting rating 50 A @ 63 VDC 1
Operating temperature -20 105 °C Operating temperature range 1
Storage temperature 5 35 °C Storage conditions 1
Fusing time 5 s 200 % of rated current 4
Temperature rise 75 °C 100 % of rated current, surface temperature 4
Resistance change after resistance to solder heat ΔR -20 20 % 260 °C ±5 °C, 10 seconds ±1 second 4
Resistance change after resistance to dry heat ΔR -20 20 % 105 °C ±5 °C, 1000 hours 4
Resistance change after thermal shock ΔR 10 % -20 °C / +25 °C / +125 °C / +25 °C, 10 cycles 4

CAD (KiCad official)

  • Symbol: SF-1206S125-2
  • Footprint: Fuse:Fuse_1206_3216Metric
  • 3D model: 1206 (KiCad packages3D, STEP)
  • 3D model files: sf-1206s125-2-etched.step / sf-1206s125-2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sf-1206s125-2.step / sf-1206s125-2.glb are the bare package body.

Provenance

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

  • Datasheet: BOURNS datasheet (5 pp, sha256 703b1f579a261b6b, retrieved 2026-10-19, 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