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AP431SAN1TR-G1
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Diodes Incorporated Voltage Reference, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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AP431SAN1TR-G1
Diodes Incorporated · Voltage Reference · SOT-23-3
AP431SAN1TR-G1 from Diodes Incorporated, in a SOT-23-3. 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 | REF | input | Reference input of the adjustable shunt regulator, set to VREF of 2.5 V (2.495 V for the H variants) and used with external resistors to program the output voltage. |
| 2 | ANODE | passive | Anode terminal of the shunt regulator; the datasheet gives no separate pin-specific electrical limit for it. |
| 3 | CATHODE | passive | Cathode terminal of the shunt regulator, rated for a cathode voltage up to 36 V and a cathode current of 0.1 mA to 100 mA in recommended operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23-3 |
| 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 Voltage (0.5% grade, AP431SA) | VREF | 2.487 | 2.5 | 2.512 | V | VKA = VREF, IKA = 1mA | 5 |
| Deviation of Reference Voltage Over Full Temperature Range | VREF | 3 | 6 | mV | VKA = VREF, IKA = 1mA, 0°C to +70°C | 5 | |
| Deviation of Reference Voltage Over Full Temperature Range | VREF | 6 | 10 | mV | VKA = VREF, IKA = 1mA, -40°C to +85°C | 5 | |
| Deviation of Reference Voltage Over Full Temperature Range | VREF | 11 | 18 | mV | VKA = VREF, IKA = 1mA, -40°C to +125°C | 5 | |
| Ratio of Change in Reference Voltage to the Change in Cathode Voltage | VREF/VKA | -1 | -2.7 | mV/V | IKA = 1mA, VKA = 10V to VREF | 5 | |
| Ratio of Change in Reference Voltage to the Change in Cathode Voltage | VREF/VKA | -0.5 | -2 | mV/V | IKA = 1mA, VKA = 36V to 10V | 5 | |
| Reference Current | IREF | 0.2 | 0.5 | µA | IKA = 1mA, R1 = 10kΩ | 5 | |
| Deviation of Reference Current Over Full Temperature Range | IREF | 0.1 | 0.3 | µA | IKA = 1mA, R1 = 10kΩ, TA = -40°C to +125°C | 5 | |
| Minimum Cathode Current for Regulation | IKA (Min) | 50 | 100 | µA | VKA = VREF | 5 | |
| Off-state Cathode Current | IKA (Off) | 0.05 | 1 | µA | VKA = 36V, VREF = 0 | 5 | |
| Dynamic Impedance | ZKA | 0.1 | 0.3 | Ω | VKA = VREF, IKA = 1mA to 100mA, f ≤ 1.0kHz | 5 | |
| Absolute Maximum Cathode Voltage | VKA | 40 | V | 4 | |||
| Absolute Maximum Cathode Current Range (Continuous) | IKA | -100 | 150 | mA | Continuous | 4 | |
| Absolute Maximum Reference Input Current Range | IREF | 10 | mA | 4 | |||
| Absolute Maximum Power Dissipation | PD | 350 | mW | SOT23 package | 4 | ||
| Absolute Maximum Junction Temperature | TJ | 150 | °C | 4 | |||
| Absolute Maximum Storage Temperature Range | TSTG | -65 | 150 | °C | 4 | ||
| ESD (Human Body Model) | ESD | 5500 | V | Human Body Model | 4 | ||
| ESD (Machine Model) | ESD | 300 | V | Machine Model | 4 | ||
| Cathode Voltage (recommended operating) | VKA | 36 | V | Minimum printed as VREF (not numeric) | 4 | ||
| Cathode Current (recommended operating) | IKA | 0.1 | 100 | mA | 4 | ||
| Operating Ambient Temperature Range | TA | -40 | 125 | °C | 4 | ||
| Thermal Resistance Junction-to-Case (SOT23) | θJC | 140 | °C/W | SOT23 package | 5 |
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 | Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 Weight: SOT23: 0.009 grams (Approximate) | 16 |
CAD (KiCad official)
- Symbol:
AP431SAN1TR-G1 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
ap431san1tr-g1-etched.step/ap431san1tr-g1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ap431san1tr-g1.step/ap431san1tr-g1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (17 pp, sha256
770b9144c5e6fc10, 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).
# AP431SAN1TR-G1
**Diodes Incorporated** · Voltage Reference · SOT-23-3
AP431SAN1TR-G1 from Diodes Incorporated, in a SOT-23-3. 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 | REF | input | Reference input of the adjustable shunt regulator, set to VREF of 2.5 V (2.495 V for the H variants) and used with external resistors to program the output voltage. |
| 2 | ANODE | passive | Anode terminal of the shunt regulator; the datasheet gives no separate pin-specific electrical limit for it. |
| 3 | CATHODE | passive | Cathode terminal of the shunt regulator, rated for a cathode voltage up to 36 V and a cathode current of 0.1 mA to 100 mA in recommended operation. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23-3 |
| 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 Voltage (0.5% grade, AP431SA) | VREF | 2.487 | 2.5 | 2.512 | V | VKA = VREF, IKA = 1mA | 5 |
| Deviation of Reference Voltage Over Full Temperature Range | VREF | | 3 | 6 | mV | VKA = VREF, IKA = 1mA, 0°C to +70°C | 5 |
| Deviation of Reference Voltage Over Full Temperature Range | VREF | | 6 | 10 | mV | VKA = VREF, IKA = 1mA, -40°C to +85°C | 5 |
| Deviation of Reference Voltage Over Full Temperature Range | VREF | | 11 | 18 | mV | VKA = VREF, IKA = 1mA, -40°C to +125°C | 5 |
| Ratio of Change in Reference Voltage to the Change in Cathode Voltage | VREF/VKA | | -1 | -2.7 | mV/V | IKA = 1mA, VKA = 10V to VREF | 5 |
| Ratio of Change in Reference Voltage to the Change in Cathode Voltage | VREF/VKA | | -0.5 | -2 | mV/V | IKA = 1mA, VKA = 36V to 10V | 5 |
| Reference Current | IREF | | 0.2 | 0.5 | µA | IKA = 1mA, R1 = 10kΩ | 5 |
| Deviation of Reference Current Over Full Temperature Range | IREF | | 0.1 | 0.3 | µA | IKA = 1mA, R1 = 10kΩ, TA = -40°C to +125°C | 5 |
| Minimum Cathode Current for Regulation | IKA (Min) | | 50 | 100 | µA | VKA = VREF | 5 |
| Off-state Cathode Current | IKA (Off) | | 0.05 | 1 | µA | VKA = 36V, VREF = 0 | 5 |
| Dynamic Impedance | ZKA | | 0.1 | 0.3 | Ω | VKA = VREF, IKA = 1mA to 100mA, f ≤ 1.0kHz | 5 |
| Absolute Maximum Cathode Voltage | VKA | | | 40 | V | | 4 |
| Absolute Maximum Cathode Current Range (Continuous) | IKA | -100 | | 150 | mA | Continuous | 4 |
| Absolute Maximum Reference Input Current Range | IREF | | | 10 | mA | | 4 |
| Absolute Maximum Power Dissipation | PD | | | 350 | mW | SOT23 package | 4 |
| Absolute Maximum Junction Temperature | TJ | | | 150 | °C | | 4 |
| Absolute Maximum Storage Temperature Range | TSTG | -65 | | 150 | °C | | 4 |
| ESD (Human Body Model) | ESD | | | 5500 | V | Human Body Model | 4 |
| ESD (Machine Model) | ESD | | | 300 | V | Machine Model | 4 |
| Cathode Voltage (recommended operating) | VKA | | | 36 | V | Minimum printed as VREF (not numeric) | 4 |
| Cathode Current (recommended operating) | IKA | 0.1 | | 100 | mA | | 4 |
| Operating Ambient Temperature Range | TA | -40 | | 125 | °C | | 4 |
| Thermal Resistance Junction-to-Case (SOT23) | θJC | | 140 | | °C/W | SOT23 package | 5 |
## 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 | Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 Weight: SOT23: 0.009 grams (Approximate) | 16 |
## CAD (KiCad official)
- Symbol: `AP431SAN1TR-G1`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `ap431san1tr-g1-etched.step` / `ap431san1tr-g1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ap431san1tr-g1.step` / `ap431san1tr-g1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8560090675443228672) (17 pp, sha256 `770b9144c5e6fc10`, 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/ap431san1tr-g1-datasheet.pdf)