| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| LM123KSTEEL/883B | National Semiconductor Corporation | Check for Price | Fixed Positive Standard Regulator, 5V, BIPolar, MBFM2 | LM123K vs LM123KSTEEL/883B |
| LM123KSTEEL | National Semiconductor Corporation | Check for Price | Fixed Positive Standard Regulator, 5V, BIPolar, MBFM2 | LM123K vs LM123KSTEEL |
| LM123K/883B | National Semiconductor Corporation | Check for Price | Fixed Positive Standard Regulator, 5V, BIPolar, MBFM2 | LM123K vs LM123K/883B |
| LM123K | Linear Technology | Check for Price | Fixed Positive Standard Regulator, 5V, BIPolar, MBFM2 | LM123K vs LM123K |
| LM123K/883B | Texas Instruments | Check for Price | Fixed Positive Standard Regulator, 5V, BIPolar, MBFM2 | LM123K vs LM123K/883B |
Part Details for LM123K by STMicroelectronics
Results Overview of LM123K by STMicroelectronics
- Distributor Offerings: (1 listing)
- Number of FFF Equivalents: (5 replacements)
- Tariff Estimator: (Available) NEW
- Number of Functional Equivalents: (10 options)
- CAD Models: (Request Part)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
LM123K Information
LM123K by STMicroelectronics is a Linear Regulator IC.
Linear Regulator ICs are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
Available Datasheets
| Part # | Manufacturer | Description | Datasheet |
|---|---|---|---|
| LM123K/883 | Texas Instruments | Military Grade 3A 5V Output Linear Regulator / LDO 2-TO |
Price & Stock for LM123K
| Part # | Distributor | Description | Stock | Price | Buy | |
|---|---|---|---|---|---|---|
|
DISTI #
LM123K-ND
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DigiKey | IC REG LINEAR 5V 3A TO3 Min Qty: 200 Container: Bulk |
0 Bulk |
|
$5.2792 | Buy Now |
US Tariff Estimator: LM123K by STMicroelectronics
Calculations from this tool are estimations only for imports into the United States. Please refer to the distributor or manufacturer and reference official US government sources and authorities to verify any final purchase costs.
LM123K Part Data Attributes
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LM123K
STMicroelectronics
Buy Now
Datasheet
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Compare Parts:
LM123K
STMicroelectronics
Fixed Positive Standard Regulator, 5V, BIPolar, MBFM2
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| Part Life Cycle Code | Obsolete | |
| Part Package Code | TO-204AA | |
| Package Description | To-3, 2 Pin | |
| Pin Count | 2 | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.60 | |
| Adjustability | Fixed | |
| Input Voltage Absolute-Max | 20 V | |
| Input Voltage-Max | 15 V | |
| Input Voltage-Min | 7.5 V | |
| JESD-30 Code | O-MBFM-P2 | |
| JESD-609 Code | e0 | |
| Line Regulation-Max | 0.025% | |
| Load Regulation-Max | 0.1% | |
| Number of Functions | 1 | |
| Number of Outputs | 1 | |
| Number of Terminals | 2 | |
| Operating Temperature TJ-Max | 150 °C | |
| Operating Temperature TJ-Min | -55 °C | |
| Operating Temperature-Max | 150 °C | |
| Operating Temperature-Min | -55 °C | |
| Output Current1-Max | 3 A | |
| Output Voltage1-Max | 5.4 V | |
| Output Voltage1-Min | 4.6 V | |
| Output Voltage1-Nom | 5 V | |
| Package Body Material | Metal | |
| Package Code | TO-220 | |
| Package Equivalence Code | TO-204/-3 | |
| Package Shape | Round | |
| Package Style | Flange Mount | |
| Peak Reflow Temperature (Cel) | Not Specified | |
| Qualification Status | Not Qualified | |
| Regulator Type | Fixed Positive Single Output Standard Regulator | |
| Surface Mount | No | |
| Technology | Bipolar | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Terminal Form | Pin/Peg | |
| Terminal Position | Bottom | |
| Time@Peak Reflow Temperature-Max (s) | Not Specified | |
| Voltage Tolerance-Max | 8% |
Alternate Parts for LM123K
This table gives cross-reference parts and alternative options found for LM123K. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of LM123K, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
LM123K Frequently Asked Questions (FAQ)
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The maximum power dissipation of the LM123K is 1.5W, but it can be increased to 2.5W with proper heat sinking.
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To ensure stability of the output voltage, a minimum output capacitance of 10uF is recommended, and the ESR (Equivalent Series Resistance) of the capacitor should be less than 5 ohms.
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The LM123K is rated for operation up to 125°C, but the maximum junction temperature should not exceed 150°C. Derating is required for high-temperature operation.
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A 1uF to 10uF input capacitor is recommended to filter out noise and ensure stable operation.
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A TVS (Transient Voltage Suppressor) diode or a zener diode can be used to protect the LM123K from input voltage transients. A 1kohm to 10kohm resistor in series with the input can also help to limit the current during transients.