UR133AG-33-AB3-C-R
Public Made by Adomby adom
UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownUR133AG-33-AB3-C-R
UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
UR133AG-33-AB3-C-R from UTC Unisonic Tech, in a SOT-89. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Device ground / common return. Per pin assignment 'C' (G-I-O) for the SOT-89 package, pin 1 is GND. Standby current is ~5mA typical. |
| 2 | VIN | power_in | Positive supply input, absolute maximum -0.3V to +12V. Requires a 1μF (or larger) bypass capacitor to GND. Dropout voltage is ~1.5V at IL=500mA. |
| 3 | VOUT | power_out | Regulated 3.3V (±2%) output, up to 500mA. A 10μF (or larger) capacitor to GND is required for stability; oscillation may occur without it. Current-limited at ~550mA typical. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | SOT-89 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
Same part, different packaging or reel option.
UR133AG-33-AB3-A-RUR133AG-33-AB3-B-RUR133AG-33-AB3-C-RUR133AG-33-AB3-D-RUR133AG-33-AA3-A-RUR133AG-33-AA3-B-RUR133AG-33-AA3-C-RUR133AG-33-AA3-D-RUR133AG-33-T92-A-RUR133AG-33-T92-B-RUR133AG-33-T92-C-RUR133AG-33-T92-D-R
CAD (KiCad official)
- Symbol:
UR133AG-33-AB3-C-R - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
ur133ag-33-ab3-c-r-etched.step/ur133ag-33-ab3-c-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ur133ag-33-ab3-c-r.step/ur133ag-33-ab3-c-r.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
ur133ag-33-ab3-c-r.step |
57 KB | You want the bare part, or you mark your own boards. |
ur133ag-33-ab3-c-r-etched.step |
2.5 MB | You want the part with UR133AG-33-AB3-C-R already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 639 faces against 42 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC Unisonic Tech datasheet (8 pp, sha256
e2b32e3c477e62f3, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).