component

SP721ABTG

Public Made by Adom

by adom

Littelfuse Surge Suppressors, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttvs-fuse-board level protectionsp721abtgfactory-2.0.0extractor-text

Verified SP721ABTG

by Ray · last 2 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

2 Nov 2026RayPublished by the parts factory: tier lcsc, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: SP721ABTG · SOIC-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 6-page datasheet
  • ✓distributor: lcsc C17272510, digikey F3163TR-ND, mouser 576-SP721ABTG
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 6 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-whxdu7fq/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 1 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 1 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ sp721abtg.kicad_sym✓ sp721abtg.kicad_mod✓ sp721abtg.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 7d ago
viewers sp721abtg: viewers · Ray 7d ago
package.json Publish 0.1.0 · Ray 7d ago
page.json Set visibility: public · Ray 7d ago
README.md Publish 0.1.0 · Ray 7d ago
sp721abtg-hero.glb Publish 0.1.0 · Ray 7d ago
sp721abtg-hero.overlay.json Publish 0.1.0 · Ray 7d ago
sp721abtg.glb Publish 0.1.0 · Ray 7d ago
sp721abtg.kicad_mod Publish 0.1.0 · Ray 7d ago
sp721abtg.kicad_sym Publish 0.1.0 · Ray 7d ago
sp721abtg.lbr Publish 0.1.0 · Ray 7d ago
sp721abtg.step Publish 0.1.0 · Ray 7d ago
verification.json Verified: Published by the parts factory: tier lcsc, 8 pins · Ray 7d ago

SP721ABTG

Littelfuse · Surge Suppressors · SOIC-8

SP721ABTG from Littelfuse, in a SOIC-8. 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 IN input Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V.
2 IN input Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V.
3 IN input Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V.
4 V- power_in Negative supply pin; SCR structures trigger at a negative pulse of one VBE diode threshold below V-.
5 IN input Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V.
6 IN input Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V.
7 IN input Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V.
8 V+ power_in Positive supply pin; SCR structures trigger at one VBE diode threshold above V+.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package SOIC-8
Category TVS/Fuse/Board Level Protection
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Operating Voltage Range VSUPPLY 2 30 V VSUPPLY = [(V+) - (V-)] 2
Input Leakage Current IIN -20 5 20 nA 2
Quiescent Supply Current IQUIESCENT 50 200 nA 2
Continuous Supply Voltage 35 V (V+) - (V-) 2
Forward Peak Current 2 A IIN to VCC, IIN to GND; 100us 2
Operating Temperature Range -40 105 C 1
Maximum Storage Temperature Range -65 150 C 2
Maximum Junction Temperature (Plastic Package) 150 C 2
Maximum Lead Temperature (Soldering) 260 C Soldering 20-40s (SOIC Lead Tips Only) 2
Thermal Resistance Junction-to-Ambient (SOIC) θJA 170 oC/W Typical, Note 1; SOIC Package 2
Forward Voltage Drop IN to V- VFWDL 2 V IIN = 1A (Peak Pulse) 2
Forward Voltage Drop IN to V+ VFWDH 2 V 2
Equivalent SCR ON Threshold 1.1 V Note 3 2
Equivalent SCR ON Resistance 1 Ω VFWD/IFWD; Note 3 2
Input Capacitance CIN 3 pF 2
Input Switching Speed tON 2 ns 2

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 Alloy tin Lead Plating Matte Tin Lead Material Copper Alloy 6

CAD (KiCad official)

  • Symbol: SP721ABTG
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Littelfuse datasheet (6 pp, sha256 eb5e983ff1c51866, retrieved 2026-11-02, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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).

Datasheet PDF