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National Semiconductor LM338K STEEL 5A Adjustable Voltage Regulator TO-3 NOS
National Semiconductor LM338K STEEL 5A Adjustable Voltage Regulator TO-3 NOS
Regular price
$24.95 USD
Regular price
Sale price
$24.95 USD
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ITEM SPECIFICS
Brand: National Semiconductor
MPN: LM338K STEEL
Model: LM338K
Type: 3-Terminal Adjustable Positive Linear Voltage Regulator
Output Voltage: Adjustable, 1.2 V to 32 V
Output Current: 5 A continuous (7 A peak)
Input-Output Differential: 40 V max
Reference Voltage: 1.24 V typical
Package: TO-3 Steel Metal Can (K suffix)
Mounting: Chassis / Heatsink (2-hole flange)
Operating Junction Temperature: 0 °C to +125 °C
Date Code: 8512
Quantity: 1
Condition: New (New Old Stock)
DESCRIPTION
This is one National Semiconductor LM338K STEEL 5-amp adjustable positive voltage regulator in a TO-3 steel can. It's new old stock and has never been installed. The case is marked with the National logo, ":H8512", "LM338K" and "STEEL." The can and flange show light surface wear, tarnish and handling marks from storage. The pins are intact. Please see the photos.
Features:
Adjustable output from 1.2 V to 32 V with two external resistors
5 A guaranteed output current, 7 A peak
Line regulation 0.005 %/V typical; load regulation 0.1 % typical
1.24 V typical reference voltage
Ripple rejection 60 dB, or about 75 dB with a 10 µF capacitor on the adjust pin
Internal current limiting, thermal overload protection and safe-area protection
TO-3 steel package, rated up to 50 W with proper heatsinking (1 °C/W junction-to-case)
The case is the output terminal, so insulate it from the heatsink if needed
Compatibility:
Direct replacement for the LM338K in bench and lab power supplies, battery chargers, audio amplifier supplies, and industrial and test equipment. It's the 5 A, TO-3 counterpart of the LM338T (TO-220) and the higher-current sibling of the LM317K and LM350K adjustable regulators. The LM138K is the military-temperature version. Check pinout and heatsink requirements before installing.
Q&A
Q: What output current can the LM338K deliver?
A: 5 A continuous and 7 A peak, per the National Semiconductor datasheet, with adequate heatsinking.
Q: What's the output voltage range?
A: Adjustable from 1.2 V to 32 V, set by two external resistors.
Q: Is the case connected to a terminal?
A: Yes. On the TO-3 package, the case is the output. Use an insulator kit if the heatsink isn't at output potential.
Q: Is this new?
A: Yes. It's new old stock and has never been installed. There's some light storage wear on the case.
DISCLAIMER
The item shown in the photos is the exact item you will receive. Please review all photos and the description carefully before purchasing. Specifications are given for reference; verify compatibility with your equipment before installation.
LEGAL DISCLAIMER
American Industrial Parts Group is not an authorized distributor or affiliate of National Semiconductor or Texas Instruments. Brand names, trademarks and part numbers are used for identification purposes only. Electrical components should be installed by qualified personnel in accordance with applicable codes.
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Thank you for shopping with American Industrial Parts Group!
Brand: National Semiconductor
MPN: LM338K STEEL
Model: LM338K
Type: 3-Terminal Adjustable Positive Linear Voltage Regulator
Output Voltage: Adjustable, 1.2 V to 32 V
Output Current: 5 A continuous (7 A peak)
Input-Output Differential: 40 V max
Reference Voltage: 1.24 V typical
Package: TO-3 Steel Metal Can (K suffix)
Mounting: Chassis / Heatsink (2-hole flange)
Operating Junction Temperature: 0 °C to +125 °C
Date Code: 8512
Quantity: 1
Condition: New (New Old Stock)
DESCRIPTION
This is one National Semiconductor LM338K STEEL 5-amp adjustable positive voltage regulator in a TO-3 steel can. It's new old stock and has never been installed. The case is marked with the National logo, ":H8512", "LM338K" and "STEEL." The can and flange show light surface wear, tarnish and handling marks from storage. The pins are intact. Please see the photos.
Features:
Adjustable output from 1.2 V to 32 V with two external resistors
5 A guaranteed output current, 7 A peak
Line regulation 0.005 %/V typical; load regulation 0.1 % typical
1.24 V typical reference voltage
Ripple rejection 60 dB, or about 75 dB with a 10 µF capacitor on the adjust pin
Internal current limiting, thermal overload protection and safe-area protection
TO-3 steel package, rated up to 50 W with proper heatsinking (1 °C/W junction-to-case)
The case is the output terminal, so insulate it from the heatsink if needed
Compatibility:
Direct replacement for the LM338K in bench and lab power supplies, battery chargers, audio amplifier supplies, and industrial and test equipment. It's the 5 A, TO-3 counterpart of the LM338T (TO-220) and the higher-current sibling of the LM317K and LM350K adjustable regulators. The LM138K is the military-temperature version. Check pinout and heatsink requirements before installing.
Q&A
Q: What output current can the LM338K deliver?
A: 5 A continuous and 7 A peak, per the National Semiconductor datasheet, with adequate heatsinking.
Q: What's the output voltage range?
A: Adjustable from 1.2 V to 32 V, set by two external resistors.
Q: Is the case connected to a terminal?
A: Yes. On the TO-3 package, the case is the output. Use an insulator kit if the heatsink isn't at output potential.
Q: Is this new?
A: Yes. It's new old stock and has never been installed. There's some light storage wear on the case.
DISCLAIMER
The item shown in the photos is the exact item you will receive. Please review all photos and the description carefully before purchasing. Specifications are given for reference; verify compatibility with your equipment before installation.
LEGAL DISCLAIMER
American Industrial Parts Group is not an authorized distributor or affiliate of National Semiconductor or Texas Instruments. Brand names, trademarks and part numbers are used for identification purposes only. Electrical components should be installed by qualified personnel in accordance with applicable codes.
lm338k, lm338k steel, LM338K STEEL, lm338k voltage regulator, lm338k replacement, lm338k equivalent, lm338k pinout, lm338k power supply, lm338 TO-3, LM338, National Semiconductor LM338K, NSC LM338K, 5 amp adjustable voltage regulator, TO-3 voltage regulator, adjustable power supply regulator, LM317K alternative, LM350K alternative, vintage National Semiconductor IC, power supply not regulating, NOS voltage regulator
Thank you for shopping with American Industrial Parts Group!
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