component
SMAJ33A-Q
Public Made by Adomby adom
BOURNS TVS, SMA(DO-214AC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownSMAJ33A-Q
BOURNS · TVS · SMA(DO-214AC)
SMAJ33A-Q from BOURNS, in a SMA(DO-214AC). 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, marked by the cathode band on the unidirectional SMAJ33A-Q, connects to the protected line, which must stay at or below VRWM of 33 V (breakdown 36.7 to 40.6 V at 1.0 mA, max clamp 53.3 V at 7.5 A 10/1000 µs). |
| 2 | A | passive | Anode, the terminal opposite the cathode band, connects to the return or ground reference for the 400 W (10/1000 µs) transient clamp. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| Package | SMA(DO-214AC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage | VBR | 36.7 | 40.6 | V | @ IT = 1.0 mA | 2 | |
| Working Peak Reverse Voltage | VRWM | 33 | V | 2 | |||
| Maximum Reverse Leakage | IR | 1 | μA | @ VRWM | 2 | ||
| Maximum Clamping Voltage (10/1000 μs) | Vc | 53.3 | V | @ Ipp (10/1000 μs) = 7.5 A | 2 | ||
| Maximum Peak Pulse Current (10/1000 μs) | Ipp | 7.5 | A | 10/1000 μs | 2 | ||
| Maximum Clamping Voltage (8/20 μs) | Vc | 69.3 | V | @ Ipp (8/20 μs) = 37.5 A | 2 | ||
| Maximum Peak Pulse Current (8/20 μs) | Ipp | 37.5 | A | 8/20 μs | 2 | ||
| Minimum Peak Pulse Power Dissipation | PPK | 400 | Watts | TP = 1 ms, TA = 25 °C | 1 | ||
| Peak Forward Surge Current | IFSM | 40 | Amps | 8.3 ms single half sine wave superimposed on rated load (JEDEC method), unidirectional only | 1 | ||
| Operating Temperature Range | TJ | -55 | 150 | °C | 1 | ||
| Storage Temperature Range | TSTG | -55 | 150 | °C | 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 5.0 mm2 (0.03 mm thick) copper pads to each terminal. | 1 |
CAD (KiCad official)
- Symbol:
SMAJ33A-Q - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
smaj33a-q-etched.step/smaj33a-q-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj33a-q.step/smaj33a-q.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BOURNS datasheet (6 pp, sha256
befe3c41feca349b, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).