component

SMTPA270

Public Made by Adom

by adom

STMicroelectronics Thyristor Surge Suppressors (TSS), SMB. 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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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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docs Publish 0.1.0 · Ray 18d ago
viewers smtpa270: symbol repaired (bidirectional TVS (the page says so)) · Ray 5d ago
package.json Publish 0.1.0 · Ray 18d ago
page.json Set visibility: public · Ray 18d ago
README.md Publish 0.1.0 · Ray 18d ago
smtpa270-etched.glb Publish 0.1.0 · Ray 18d ago
smtpa270-etched.step smtpa270: factory component page (tier=mfr) · Ray 18d ago
smtpa270-hero.glb smtpa270: hero GLB from the etched model (keeps the MPN mark) · Ray 18d ago
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smtpa270.glb Publish 0.1.0 · Ray 18d ago
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smtpa270.kicad_sym smtpa270: symbol repaired (bidirectional TVS (the page says so)) · Ray 5d ago
smtpa270.lbr smtpa270: symbol repaired (bidirectional TVS (the page says so)) · Ray 5d ago
smtpa270.step Publish 0.1.0 · Ray 18d ago

SMTPA270

STMicroelectronics · Thyristor Surge Suppressors (TSS) · SMB

SMTPA270 from STMicroelectronics, in a SMB. 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 STMicroelectronics
Package SMB
Category TVS/Fuse/Board Level 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
Leakage current at VRM IRM 2 µA @ VRM = 243 V, Tamb = 25°C 4
Leakage current at VR IR 5 µA @ VR = 270 V, Tamb = 25°C 4
Dynamic breakover voltage VBO 350 V Dynamic, see test circuit 1 (Figure 9) 4
Static breakover voltage VBO 360 V Static, @ IBO, see test circuit 2 (Figure 10) 4
Breakover current IBO 800 mA See test circuit 2 (Figure 10) 4
Holding current IH 150 mA See functional holding current test circuit 3 (Figure 11) 4
Capacitance at 50 V C 12 pF VR = 50 V bias, VRMS = 1 V, F = 1 MHz 4
Capacitance at 2 V C 25 pF VR = 2 V bias, VRMS = 1 V, F = 1 MHz 4
Repetitive peak pulse current 10/1000 µs IPP 50 A 10/1000 µs, Tamb = 25°C 2
Repetitive peak pulse current 8/20 µs IPP 150 A 8/20 µs, Tamb = 25°C 2
Repetitive peak pulse current 10/560 µs IPP 55 A 10/560 µs, Tamb = 25°C 2
Repetitive peak pulse current 5/310 µs IPP 65 A 5/310 µs, Tamb = 25°C 2
Repetitive peak pulse current 10/160 µs IPP 75 A 10/160 µs, Tamb = 25°C 2
Repetitive peak pulse current 1/20 µs IPP 100 A 1/20 µs, Tamb = 25°C 2
Repetitive peak pulse current 2/10 µs IPP 100 A 2/10 µs, Tamb = 25°C 2
Fail-safe mode maximum current IFS 2.5 kA 8/20 µs; device acts as a short circuit 2
Non repetitive surge peak on-state current ITSM 16 A Sinusoidal, t = 0.2 s 2
Non repetitive surge peak on-state current ITSM 11.5 A Sinusoidal, t = 1 s 2
Non repetitive surge peak on-state current ITSM 10 A Sinusoidal, t = 2 s 2
Non repetitive surge peak on-state current ITSM 3.5 A Sinusoidal, t = 15 mn 2
I2t value for fusing I2t 6.2 A2s t = 16.6 ms 2
I2t value for fusing I2t 6.5 A2s t = 20 ms 2
Storage temperature range Tstg -55 150 °C 2
Maximum junction temperature Tj 150 °C 2
Maximum lead temperature for soldering TL 260 °C during 10 s 2
Junction to ambient thermal resistance Rth(j-a) 100 °C/W SMB, with recommended footprint 3
Junction to leads thermal resistance Rth(j-l) 20 °C/W SMB 3

CAD (KiCad official)

  • Symbol: SMTPA270
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: smtpa270-etched.step / smtpa270-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smtpa270.step / smtpa270.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (11 pp, sha256 d17787688e344d7b, retrieved 2026-10-22, tier: manufacturer)
  • 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