component
TPSMB78A-VR
Public Made by Adomby adom
Littelfuse TVS, DO-214AA(SMBJ). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 11d ago |
| viewers | 11d ago |
| package.json | 11d ago |
| page.json | 11d ago |
| README.md | 11d ago |
| tpsmb78a-vr-etched.glb | 11d ago |
| tpsmb78a-vr-etched.step | 11d ago |
| tpsmb78a-vr-hero.glb | 11d ago |
| tpsmb78a-vr-hero.overlay.json | 11d ago |
| tpsmb78a-vr.glb | 11d ago |
| tpsmb78a-vr.kicad_mod | 11d ago |
| tpsmb78a-vr.kicad_sym | 11d ago |
| tpsmb78a-vr.lbr | 11d ago |
| tpsmb78a-vr.step | 11d ago |
TPSMB78A-VR
Littelfuse · TVS · DO-214AA(SMBJ)
TPSMB78A-VR from Littelfuse, in a DO-214AA(SMBJ). 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | DO-214AA(SMBJ) |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage | VBR | 86.7 | 95.8 | V | @ IT = 1 mA | 2 | |
| Maximum Clamping Voltage | VC | 126 | V | @ Ipp = 4.8 A | 2 | ||
| Maximum Peak Pulse Current | Ipp | 4.8 | A | 2 | |||
| Maximum Reverse Leakage | IR | 1 | µA | @ VR | 2 | ||
| Maximum Temperature Coefficient of VBR | αT | 0.106 | %/C | 2 | |||
| Reverse Stand-off Voltage | VR | 78 | V | 2 | |||
| Typical IR at 150°C | IR | 8 | µA | @ 150°C | 2 | ||
| Peak Pulse Power Dissipation | PPPM | 600 | W | 10/1000µs waveform, TA=25°C | 1 | ||
| Power Dissipation on infinite heat sink | PM(AV) | 5 | W | TL=50°C | 1 | ||
| Peak Forward Surge Current | IFSM | 100 | A | 8.3ms single half sine wave, unidirectional only | 1 | ||
| Maximum Instantaneous Forward Voltage | VF | 3.5 | V | at 50A, unidirectional only; VR<250V | 1 | ||
| Operating Junction Temperature Range | TJ | -65 | 175 | °C | VR≤78V | 1 | |
| Storage Temperature Range | TSTG | -65 | 175 | °C | 1 | ||
| Thermal Resistance Junction to Lead | RθJL | 20 | °C/W | Typical | 1 | ||
| Thermal Resistance Junction to Ambient | RθJA | 100 | °C/W | Typical | 1 | ||
| VBR Voltage Tolerance | -5 | 5 | % | 5% VBR voltage tolerance | 6 |
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 | tin | • Matte tin lead-free plated • Halogen free and RoHS | 1 |
CAD (KiCad official)
- Symbol:
TPSMB78A-VR - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA(SMBJ) (KiCad packages3D, STEP)
- 3D model files:
tpsmb78a-vr-etched.step/tpsmb78a-vr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tpsmb78a-vr.step/tpsmb78a-vr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
ecc921caf390ee00, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).