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TL431K-T92-B
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UTC Unisonic Tech Voltage Reference, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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TL431K-T92-B
UTC Unisonic Tech · Voltage Reference · TO-92
TL431K-T92-B from UTC Unisonic Tech, in a TO-92. 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 | R | input | Reference input (VREF approximately 2.5V) that sets the cathode voltage through an external R1/R2 divider; reference input current range is -0.05 to +10 mA. |
| 2 | A | power_in | Anode, the ground/return terminal of the shunt regulator. |
| 3 | K | passive | Cathode, regulated output from VREF to 36V recommended (37V absolute maximum) with 1 to 100 mA recommended cathode current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | TO-92 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
TL431K-T92-B - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
tl431k-t92-b-etched.step/tl431k-t92-b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431k-t92-b.step/tl431k-t92-b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC Unisonic Tech datasheet (6 pp, sha256
cbc7e42ea3607271, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).
# TL431K-T92-B
**UTC Unisonic Tech** · Voltage Reference · TO-92
TL431K-T92-B from UTC Unisonic Tech, in a TO-92. 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 | R | input | Reference input (VREF approximately 2.5V) that sets the cathode voltage through an external R1/R2 divider; reference input current range is -0.05 to +10 mA. |
| 2 | A | power_in | Anode, the ground/return terminal of the shunt regulator. |
| 3 | K | passive | Cathode, regulated output from VREF to 36V recommended (37V absolute maximum) with 1 to 100 mA recommended cathode current. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | TO-92 |
| Category | Power Management (PMIC) |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `TL431K-T92-B`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `tl431k-t92-b-etched.step` / `tl431k-t92-b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl431k-t92-b.step` / `tl431k-t92-b.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [UTC Unisonic Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886964515328000) (6 pp, sha256 `cbc7e42ea3607271`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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](docs/tl431k-t92-b-datasheet.pdf)