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LM323K The STMicroelectronics LM323K is a three-terminal positive voltage regulator with a preset 5V output and a load driving capability of 3A. It is designed for high reliability with internal current and thermal limiting.
Mfr Part #:

LM323K

Available from 3 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics LM323K is a three-terminal positive voltage regulator with a preset 5V output and a load driving capability of 3A. It is designed for high reliability with internal current and thermal limiting.
✓ Total Stock: 2,512 pcs
$ Price Range: $0.28

LM323K Available from 3 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
2,333 pcs
On Request
2333 pcs On Request 1 On Request On Request On Request On Request On Request
Smaxon Electronics ✓
Non-Authorised Inventory information
147 pcs
On Request
147 pcs On Request 1 On Request On Request 14+13+ On Request On Request
Partservice ✓
Non-Authorised Inventory information
32 pcs
On Request
32 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

LM323K Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Mounting Type
Number of Regulators
Operating Temperature
Output Configuration
Output Type
PSRR
Power Dissipation
Protection Features
Quiescent Current
Supplier Device Package
Supply Current
Thermal Resistance
Voltage
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LM323K Description

Short technical summary and product information.

The LM323K from STMicroelectronics is a robust three-terminal positive voltage regulator featuring a fixed 5V output and a substantial 3A output current capability. This device is designed for applications requiring reliable power delivery, incorporating internal current limiting and thermal shutdown for protection against overloads and overheating.

 

With a typical output impedance of 0.01 W, the LM323K offers good regulation characteristics. It operates within a temperature range of 0°C to 125°C and is housed in a TO-3 (TO-204AA) package, suitable for through-hole mounting. The minimum input voltage required is 7.5V, and it can handle an input voltage up to 20V. Its power dissipation is rated at 30W, with internal limiting providing further protection.

 

This regulator is virtually blowout-proof due to its comprehensive protection features, including current limiting, power limiting, and thermal shut-down. These characteristics ensure reliable performance as a system element, making it suitable for various industrial and power supply applications where a stable 5V source is needed.

LM323K Quick Information

Product Type: Linear Voltage Regulator
Canonical Name: LM323K Three-terminal 3 A adjustable voltage regulator
Subcategory: Linear

LM323K Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

LM323K Estimated Pricing

Qty Low High
1+ $0.28 $0.28

Estimated market price range - modelled values for guidance only, not live distributor offers.

LM323K Features

  • Fixed 5V output voltage.
  • High output current capability of 3A.
  • Internal current and thermal limiting.
  • TO-3 package for through-hole mounting.
  • Wide operating temperature range.

LM323K Applications

  • Power supply regulation.
  • Industrial control systems.
  • Test and measurement equipment.
  • General purpose power applications.

LM323K FAQs

7 frequently asked questions generated from this part’s specifications.
What is the output voltage of the LM323K?

The nominal output voltage is 5V fixed.

What is the output current rating?

The LM323K can deliver up to 3A output current.

What is the input voltage range?

The input voltage range is 7.5V minimum to 20V maximum.

What is the operating temperature range?

The operating temperature range is 0°C to 125°C.

What package is the LM323K available in?

The LM323K is available in a TO-3 package with through-hole mounting.

Does the LM323K have over-current protection?

Yes, it includes over-current and over-temperature protection.

What is the dropout voltage?

The maximum dropout voltage is 0.3V at 150mA output current.

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