component

TPSMD28A

Public Made by Adom

by adom

Littelfuse TVS, DO-214AB(SMCJ). Pinout cross-checked by two models against the datasheet, 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 10d ago
viewers tpsmd28a: symbol repaired (D_Zener, cathode pad 1) · Ray 1d ago
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page.json Set visibility: public · Ray 10d ago
README.md Publish 0.1.0 · Ray 10d ago
tpsmd28a-etched.glb Publish 0.1.0 · Ray 10d ago
tpsmd28a-etched.step tpsmd28a: factory component page (tier=lcsc) · Ray 10d ago
tpsmd28a-hero.glb tpsmd28a: hero GLB from the etched model (keeps the MPN mark) · Ray 10d ago
tpsmd28a-hero.overlay.json Publish 0.1.0 · Ray 10d ago
tpsmd28a.glb Publish 0.1.0 · Ray 10d ago
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tpsmd28a.kicad_sym tpsmd28a: symbol repaired (D_Zener, cathode pad 1) · Ray 1d ago
tpsmd28a.lbr tpsmd28a: symbol repaired (D_Zener, cathode pad 1) · Ray 1d ago
tpsmd28a.step Publish 0.1.0 · Ray 10d ago

TPSMD28A

Littelfuse · TVS · DO-214AB(SMCJ)

TPSMD28A from Littelfuse, in a DO-214AB(SMCJ). 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 Cathode passive Cathode (positive end) of the unidirectional TVS, marked by the color band; the TPSMD28A has a 28.0V reverse standoff voltage, 31.10-34.40V breakdown at 1mA, and 45.4V maximum clamping at 66.1A.
2 Anode passive Anode of the unidirectional TVS, opposite the cathode band end; forward voltage is at most 3.5V at 100A.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package DO-214AB(SMCJ)
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
Reverse Stand-off Voltage VR 28 V 2
Breakdown Voltage VBR 31.1 34.4 V @ IT = 1 mA 2
Test Current IT 1 mA 2
Maximum Clamping Voltage VC 45.4 V @ Ipp = 66.1 A 2
Maximum Peak Pulse Current Ipp 66.1 A 2
Maximum Reverse Leakage IR 2 µA @ VR 2
Maximum Instantaneous Forward Voltage VF 3.5 V at 100A for Unidirectional Only 1
Peak Pulse Power Dissipation PPPM 3000 W 10/1000µs waveform, TA=25°C 1
Power Dissipation on Infinite Heat Sink PM(AV) 6.5 W TA=50°C 1
Peak Forward Surge Current IFSM 300 A 8.3ms single half sine wave, unidirectional only 1
Operating Junction and Storage Temperature Range TJ, TSTG -65 150 °C 1
Typical Thermal Resistance Junction to Lead RθJL 15 °C/W 1
Typical Thermal Resistance Junction to Ambient RθJA 75 °C/W 1

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 2. Mounted on copper pad area of 0.31x0.31” (8.0 x 8.0mm) to each terminal. 1

CAD (KiCad official)

  • Symbol: TPSMD28A
  • Footprint: Diode_SMD:D_SMC
  • 3D model: DO-214AB(SMCJ) (KiCad packages3D, STEP)
  • 3D model files: tpsmd28a-etched.step / tpsmd28a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tpsmd28a.step / tpsmd28a.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse datasheet (6 pp, sha256 778e34f01000b1a4, retrieved 2026-10-27, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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