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KIA431AM-RTK
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KEC Semicon Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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KIA431AM-RTK
KEC Semicon · Voltage Reference · SOT-23
KIA431AM-RTK from KEC Semicon, in a SOT-23. 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 current is rated for a continuous range of -100 mA to 150 mA, and the cathode-to-anode voltage must not exceed 37 V (absolute maximum). |
| 2 | Ref | input | Reference input is rated for a continuous current range of -0.05 mA to 10 mA, and it sets the programmed reference voltage of about 2.495 V (Vref) at IK = 10 mA. |
| 3 | Anode | passive | Anode is the common terminal for the shunt regulator, and the cathode-to-anode voltage rating is 37 V maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reference input voltage (KIA431A, ±1.0%) | Vref | 2.47 | 2.495 | 2.52 | V | VKA=Vref, IK=10mA | 3 |
| Reference input voltage deviation over temperature range | Vref | 7 | 40 | mV | VKA=Vref, IK=10mA | 3 | |
| Ratio of change in reference input voltage to change in cathode-anode voltage (VKA = 10V) | Vref/VKA | -1.4 | -2.7 | mV/V | IK=10mA, VKA=10V | 3 | |
| Ratio of change in reference input voltage to change in cathode-anode voltage (VKA = 36V to 10V) | Vref/VKA | -1 | -2 | mV/V | IK=10mA, VKA=36V to 10V | 3 | |
| Reference input current at Ta=25°C | Iref | 1.8 | 4 | μA | IK=10mA, R1=10k, R2= | 3 | |
| Reference input current over full operating temperature (Ta=Topr) | Iref | 6.5 | μA | Ta=Topr, IK=10mA, R1=10k, R2= | 3 | ||
| Reference input current deviation over temperature range | Iref | 0.8 | 2.5 | μA | IK=10mA, R1=10k, R2= | 3 | |
| Minimum cathode current for regulation | Imin | 0.5 | 1 | mA | VKA=Vref | 3 | |
| Off-state cathode current | Ioff | 2.6 | 1000 | nA | VKA=36V, Vref=0V | 3 | |
| Cathode to anode voltage | VKA | 37 | V | 3 | |||
| Cathode current range, continuous | IK | -100 | 150 | mA | 3 | ||
| Reference input current range, continuous | Iref | -0.05 | 10 | mA | 3 | ||
| Operating junction temperature | Tj | 150 | ℃ | 3 | |||
| Operating temperature | Topr | -40 | 85 | ℃ | 3 | ||
| Storage temperature | Tstg | -65 | 150 | ℃ | 3 | ||
| Total power dissipation (KIA431M, SOT-23) | PD | 350 | mW | Package mounted on 99.5% Alumina 10×8×0.6mm (Note 1) | 3 | ||
| Operating voltage | 2.5 | 36 | V | Type No. operating voltage range | 1 | ||
| Dynamic impedance | Zka | 0.22 | Ω | VKA=Vref, IK=1.0 to 100mA, f 1.0kHz | 3 | ||
| Thermal resistance, junction to ambient (KIA431M, SOT-23) | Rth(j-a) | 357 | ℃/W | Package mounted on 99.5% Alumina 10×8×0.6mm (Note 1) | 3 |
CAD (KiCad official)
- Symbol:
KIA431AM-RTK - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
kia431am-rtk-etched.step/kia431am-rtk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);kia431am-rtk.step/kia431am-rtk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEC Semicon datasheet (7 pp, sha256
8eafef7a8a3f5a44, retrieved 2026-10-19, 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).
# KIA431AM-RTK
**KEC Semicon** · Voltage Reference · SOT-23
KIA431AM-RTK from KEC Semicon, in a SOT-23. 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 current is rated for a continuous range of -100 mA to 150 mA, and the cathode-to-anode voltage must not exceed 37 V (absolute maximum). |
| 2 | Ref | input | Reference input is rated for a continuous current range of -0.05 mA to 10 mA, and it sets the programmed reference voltage of about 2.495 V (Vref) at IK = 10 mA. |
| 3 | Anode | passive | Anode is the common terminal for the shunt regulator, and the cathode-to-anode voltage rating is 37 V maximum. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reference input voltage (KIA431A, ±1.0%) | Vref | 2.47 | 2.495 | 2.52 | V | VKA=Vref, IK=10mA | 3 |
| Reference input voltage deviation over temperature range | Vref | | 7 | 40 | mV | VKA=Vref, IK=10mA | 3 |
| Ratio of change in reference input voltage to change in cathode-anode voltage (VKA = 10V) | Vref/VKA | | -1.4 | -2.7 | mV/V | IK=10mA, VKA=10V | 3 |
| Ratio of change in reference input voltage to change in cathode-anode voltage (VKA = 36V to 10V) | Vref/VKA | | -1 | -2 | mV/V | IK=10mA, VKA=36V to 10V | 3 |
| Reference input current at Ta=25°C | Iref | | 1.8 | 4 | μA | IK=10mA, R1=10k, R2= | 3 |
| Reference input current over full operating temperature (Ta=Topr) | Iref | | | 6.5 | μA | Ta=Topr, IK=10mA, R1=10k, R2= | 3 |
| Reference input current deviation over temperature range | Iref | | 0.8 | 2.5 | μA | IK=10mA, R1=10k, R2= | 3 |
| Minimum cathode current for regulation | Imin | | 0.5 | 1 | mA | VKA=Vref | 3 |
| Off-state cathode current | Ioff | | 2.6 | 1000 | nA | VKA=36V, Vref=0V | 3 |
| Cathode to anode voltage | VKA | | | 37 | V | | 3 |
| Cathode current range, continuous | IK | -100 | | 150 | mA | | 3 |
| Reference input current range, continuous | Iref | -0.05 | | 10 | mA | | 3 |
| Operating junction temperature | Tj | | | 150 | ℃ | | 3 |
| Operating temperature | Topr | -40 | | 85 | ℃ | | 3 |
| Storage temperature | Tstg | -65 | | 150 | ℃ | | 3 |
| Total power dissipation (KIA431M, SOT-23) | PD | | | 350 | mW | Package mounted on 99.5% Alumina 10×8×0.6mm (Note 1) | 3 |
| Operating voltage | | 2.5 | | 36 | V | Type No. operating voltage range | 1 |
| Dynamic impedance | Zka | | 0.22 | | Ω | VKA=Vref, IK=1.0 to 100mA, f 1.0kHz | 3 |
| Thermal resistance, junction to ambient (KIA431M, SOT-23) | Rth(j-a) | | 357 | | ℃/W | Package mounted on 99.5% Alumina 10×8×0.6mm (Note 1) | 3 |
## CAD (KiCad official)
- Symbol: `KIA431AM-RTK`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `kia431am-rtk-etched.step` / `kia431am-rtk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kia431am-rtk.step` / `kia431am-rtk.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [KEC Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586180915010162688) (7 pp, sha256 `8eafef7a8a3f5a44`, retrieved 2026-10-19, 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/kia431am-rtk-datasheet.pdf)