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AS431IAZTR-G1
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Diodes Incorporated Voltage Reference, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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AS431IAZTR-G1
Diodes Incorporated · Voltage Reference · TO-92
AS431IAZTR-G1 from Diodes Incorporated, 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 | REF | input | Reference input held at VREF (2.5 V nominal, 2.475 V to 2.525 V at 1.0% grade) and reference input current is limited to 10 mA maximum. |
| 2 | ANODE | passive | Anode terminal of the shunt regulator, shown connected to GND in the application circuits; the datasheet gives no separate electrical limit for this pin. |
| 3 | CATHODE | passive | Cathode terminal whose voltage sets the output between VREF and a maximum of 36 V, with continuous cathode current of -100 to 150 mA absolute maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TO-92 |
| 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, TA = +25°C) | VREF | 2.487 | 2.5 | 2.512 | V | VKA = VREF, IKA = 10mA | 5 |
| Deviation of Reference Voltage over 0 to +70°C | ΔVREF | 4.5 | 8 | mV | VKA = VREF, IKA = 10mA, 0 to +70°C | 5 | |
| Deviation of Reference Voltage over -40 to +85°C | ΔVREF | 4.5 | 10 | mV | VKA = VREF, IKA = 10mA, -40 to +85°C | 5 | |
| Deviation of Reference Voltage over -40 to +125°C | ΔVREF | 4.5 | 16 | mV | VKA = VREF, IKA = 10mA, -40 to +125°C | 5 | |
| Ratio of Change in Reference Voltage to Change in Cathode Voltage (10V to VREF) | ΔVREF/ΔVKA | -1 | -2.7 | mV/V | IKA = 10mA, ΔVKA = 10V to VREF | 5 | |
| Ratio of Change in Reference Voltage to Change in Cathode Voltage (36V to 10V) | ΔVREF/ΔVKA | -0.5 | -2 | mV/V | IKA = 10mA, ΔVKA = 36V to 10V | 5 | |
| Reference Current | IREF | 0.035 | 0.5 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞ | 5 | |
| Deviation of Reference Current over Full Temperature Range | ΔIREF | 0.03 | 0.3 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞, TA = -40 to +125°C | 5 | |
| Minimum Cathode Current for Regulation | IKA (Min) | 10 | 50 | µA | VKA = VREF | 5 | |
| Off-state Cathode Current | IKA (Off) | 0.05 | 1 | µA | VKA = 36V, VREF = 0 | 5 | |
| Dynamic Impedance | ZKA | 0.15 | 0.5 | Ω | VKA = VREF, IKA = 1 to 100mA, f ≤ 1.0kHz | 5 | |
| Cathode Voltage (Absolute Maximum) | VKA | 40 | V | 4 | |||
| Cathode Current Range (Continuous) | IKA | -100 | 150 | mA | Continuous | 4 | |
| Reference Input Current Range | IREF | 10 | mA | 4 | |||
| Power Dissipation (TO-92) | PD | 770 | mW | TO-92 | 4 | ||
| Junction Temperature | TJ | 150 | ºC | 4 | |||
| Storage Temperature Range | TSTG | -65 | 150 | ºC | 4 | ||
| ESD (Human Body Model) | ESD | 2000 | V | Human Body Model | 4 | ||
| Cathode Voltage (Recommended Operating) | VKA | 36 | V | Minimum printed as VREF | 4 | ||
| Cathode Current (Recommended Operating) | IKA | 0.05 | 100 | mA | 4 | ||
| Operating Ambient Temperature Range | TA | -40 | 125 | ºC | 4 | ||
| Thermal Resistance Junction-to-Case (TO-92) | θJC | 68 | °C/W | TO-92 | 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 |
|---|---|---|---|---|
| housing | Abs | ESD ESD (Human Body Model) 2000 V Note 4: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and | 4 |
CAD (KiCad official)
- Symbol:
AS431IAZTR-G1 - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
as431iaztr-g1-etched.step/as431iaztr-g1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);as431iaztr-g1.step/as431iaztr-g1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (17 pp, sha256
7798d8aa0644ba76, retrieved 2026-10-28, tier: manufacturer) - 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).
# AS431IAZTR-G1
**Diodes Incorporated** · Voltage Reference · TO-92
AS431IAZTR-G1 from Diodes Incorporated, 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 | REF | input | Reference input held at VREF (2.5 V nominal, 2.475 V to 2.525 V at 1.0% grade) and reference input current is limited to 10 mA maximum. |
| 2 | ANODE | passive | Anode terminal of the shunt regulator, shown connected to GND in the application circuits; the datasheet gives no separate electrical limit for this pin. |
| 3 | CATHODE | passive | Cathode terminal whose voltage sets the output between VREF and a maximum of 36 V, with continuous cathode current of -100 to 150 mA absolute maximum. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TO-92 |
| 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, TA = +25°C) | VREF | 2.487 | 2.5 | 2.512 | V | VKA = VREF, IKA = 10mA | 5 |
| Deviation of Reference Voltage over 0 to +70°C | ΔVREF | | 4.5 | 8 | mV | VKA = VREF, IKA = 10mA, 0 to +70°C | 5 |
| Deviation of Reference Voltage over -40 to +85°C | ΔVREF | | 4.5 | 10 | mV | VKA = VREF, IKA = 10mA, -40 to +85°C | 5 |
| Deviation of Reference Voltage over -40 to +125°C | ΔVREF | | 4.5 | 16 | mV | VKA = VREF, IKA = 10mA, -40 to +125°C | 5 |
| Ratio of Change in Reference Voltage to Change in Cathode Voltage (10V to VREF) | ΔVREF/ΔVKA | | -1 | -2.7 | mV/V | IKA = 10mA, ΔVKA = 10V to VREF | 5 |
| Ratio of Change in Reference Voltage to Change in Cathode Voltage (36V to 10V) | ΔVREF/ΔVKA | | -0.5 | -2 | mV/V | IKA = 10mA, ΔVKA = 36V to 10V | 5 |
| Reference Current | IREF | | 0.035 | 0.5 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞ | 5 |
| Deviation of Reference Current over Full Temperature Range | ΔIREF | | 0.03 | 0.3 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞, TA = -40 to +125°C | 5 |
| Minimum Cathode Current for Regulation | IKA (Min) | | 10 | 50 | µA | VKA = VREF | 5 |
| Off-state Cathode Current | IKA (Off) | | 0.05 | 1 | µA | VKA = 36V, VREF = 0 | 5 |
| Dynamic Impedance | ZKA | | 0.15 | 0.5 | Ω | VKA = VREF, IKA = 1 to 100mA, f ≤ 1.0kHz | 5 |
| Cathode Voltage (Absolute Maximum) | VKA | | | 40 | V | | 4 |
| Cathode Current Range (Continuous) | IKA | -100 | | 150 | mA | Continuous | 4 |
| Reference Input Current Range | IREF | | | 10 | mA | | 4 |
| Power Dissipation (TO-92) | PD | | | 770 | mW | TO-92 | 4 |
| Junction Temperature | TJ | | | 150 | ºC | | 4 |
| Storage Temperature Range | TSTG | -65 | | 150 | ºC | | 4 |
| ESD (Human Body Model) | ESD | | | 2000 | V | Human Body Model | 4 |
| Cathode Voltage (Recommended Operating) | VKA | | | 36 | V | Minimum printed as VREF | 4 |
| Cathode Current (Recommended Operating) | IKA | 0.05 | | 100 | mA | | 4 |
| Operating Ambient Temperature Range | TA | -40 | | 125 | ºC | | 4 |
| Thermal Resistance Junction-to-Case (TO-92) | θJC | | 68 | | °C/W | TO-92 | 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 |
|---|---|---|---|---|
| housing | Abs | | ESD ESD (Human Body Model) 2000 V Note 4: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and | 4 |
## CAD (KiCad official)
- Symbol: `AS431IAZTR-G1`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `as431iaztr-g1-etched.step` / `as431iaztr-g1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `as431iaztr-g1.step` / `as431iaztr-g1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/AS431IAZTR-G1.pdf) (17 pp, sha256 `7798d8aa0644ba76`, retrieved 2026-10-28, tier: manufacturer)
- **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/as431iaztr-g1-datasheet.pdf)