Diodes Menu Close
Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The AS431H is a three-terminal adjustable shunt regulator with guaranteed thermal stability over a full operation range. It features sharp turn-on characteristics, low temperature coefficient and low output impedance, which make it ideal substitute for Zener diode in applications such as switching power supply, charger and other adjustable regulators.

The output voltage of AS431H can be set to any value between VREF (2.495V) and the corresponding maximum cathode voltage (36V).

The AS431H precision reference is offered in two voltage tolerance: 0.5% and 1.0%.

This IC is available in 2 packages: TO92 (Ammo Packing) and SOT23.


  • Charger
  • Voltage Adapter
  • Switching Power Supply
  • Graphic Card
  • Precision Voltage Reference


  • Programmable Precise Output Voltage from 2.495V to 36V
  • High Stability under Capacitive Load
  • Low Temperature Deviation: 5mV Typical
  • Low Equivalent Full-range Temperature Coefficient with 20PPM/°C Typical
  • Sink Current Capacity from 0.5mA to 100mA
  • Low Output Noise
  • Wide Operating Range of -40 to +125°C

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
Reference Voltage 2.495 V
Accuracy 0.5, 1 %
Maximum Input Voltage 40 V
Sink Current 100 mA
Minimum Cathode Current for Regulation Typ 350 µA
Maximum Slope Resistance 0.5 Ω
Operating Ambient Temperature Range -40 to 125 °C

Related Content



Technical Documents

Recommended Soldering Techniques


Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AS431HANTR-G1 Arrow Electronics Central EU 6000 8/3/2020 Buy Now Germany
AS431HANTR-G1 Mouser Electronics Inc. 5273 8/3/2020 Buy Now United States
AS431HANTR-G1 Digi-Key Electronics 426 8/2/2020 Buy Now United States
AS431HANTR-G1 Future Electronics - Europe 15000 8/2/2020 England
AS431HAZTR-G1 Mouser Electronics Inc. 1937 8/3/2020 Buy Now United States
AS431HAZTR-G1 Digi-Key Electronics 1664 8/2/2020 Buy Now United States
AS431HAZTR-G1 Future Electronics - Asia 200000 8/2/2020 Singapore
AS431HBNTR-G1 Mouser Electronics Inc. 2980 8/3/2020 Buy Now United States
AS431HBZTR-G1 Mouser Electronics Inc. 3598 8/3/2020 Buy Now United States
AS431HMANTR-G1 Mouser Electronics Inc. 847 8/3/2020 Buy Now United States
AS431HMANTR-G1 Digi-Key Electronics 1060 8/2/2020 Buy Now United States
AS431HMBNTR-G1 Mouser Electronics Inc. 2468 8/3/2020 Buy Now United States


Product Change Notices

PCN # Issue Date Subject
PCN-2471 2020-07-01 Additional Wafer Source - GFAB


Related Application FAQs