TLE4274 V50 Equivalent & Substitute Parts

Part Overview

The TLE4274 V50 is a linear voltage regulator IC from Infineon Technologies' OPTIREG™ series, delivering a fixed 5V output at 400mA in a TO-220-3 through-hole package. Designed for automotive applications with AEC-Q100 qualification, this part integrates over-current, over-temperature, reverse polarity, and short-circuit protection. The main part number is currently obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	400mA
Input Voltage (Max)	40V
Voltage Dropout (Max)	0.5V @ 250mA
Quiescent Current	220 µA
Operating Temperature Range	-40°C ~ 150°C
Package / Case	TO-220-3
Mounting Type	Through Hole
Grade	Automotive
Qualification	AEC-Q100

Substitute Part Grouping Explanation

Substitution of the TLE4274 V50 is determined by the following critical parameters:

Output Voltage: Must be fixed at 5V
Output Current Capability: Minimum 400mA required for direct replacement
Input Voltage Range: Maximum input voltage of 40V or higher
Package Type: TO-220-3 through-hole for direct PCB compatibility
Automotive Grade: AEC-Q100 qualification preferred for automotive applications
Operating Temperature: -40°C to 150°C range or compatible subset

Substitutes are grouped into two categories:

Category 1 - Direct Equivalents (Same Package, Same Current Rating): Parts maintaining TO-220-3 packaging and 400mA output current capability with identical electrical specifications.

Category 2 - Functional Alternatives (Different Package or Current Rating): Parts with compatible electrical characteristics but different packaging (TO-263) or reduced current ratings (100mA, 150mA, 1.5A) that may require design modification or serve specific application needs.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Voltage Dropout (Max)	Package / Case	Mounting Type	Operating Temperature	Product Status	AEC-Q100
TLE4274 V50	Infineon	5V	400mA	40V	0.5V @ 250mA	TO-220-3	Through Hole	-40°C ~ 150°C	Obsolete	Yes
TLE4274V50AKSA2	Infineon	5V	400mA	40V	0.5V @ 250mA	TO-220-3	Through Hole	-40°C ~ 150°C	Active	Yes
TLE42744GV50ATMA1	Infineon	5V	400mA	40V	0.5V @ 250mA	TO-263-3	Surface Mount	-40°C ~ 150°C	Active	Yes
LM2931AT-5.0G	onsemi	5V	100mA	26V	0.6V @ 100mA	TO-220-3	Through Hole	-40°C ~ 125°C	Active	No
LM2931T-5.0G	onsemi	5V	100mA	26V	0.6V @ 100mA	TO-220-3	Through Hole	-40°C ~ 125°C	Active	No
LM330T-5.0/NOPB	National Semiconductor	5V	150mA	26V	Not Specified	TO-220-3	Through Hole	0°C ~ 70°C	Active	No
LM340AT-5.0/NOPB	Texas Instruments	5V	1.5A	35V	2V @ 1A	TO-220-3	Through Hole	0°C ~ 125°C	Active	No
LM340T-5.0/NOPB	Texas Instruments	5V	1.5A	35V	2V @ 1A	TO-220-3	Through Hole	0°C ~ 125°C	Active	No
LM7805CT/NOPB	Texas Instruments	5V	1.5A	35V	2V @ 1A	TO-220-3	Through Hole	0°C ~ 125°C	Active	No

Engineering Selection Recommendations

For Direct Replacement (Automotive Applications)

TLE4274V50AKSA2 is the primary active equivalent from Infineon Technologies. This part maintains identical electrical specifications, TO-220-3 through-hole packaging, automotive grade classification, and AEC-Q100 qualification. The part is currently in active production status with 1515 units in stock, supplied in tube packaging. This selection eliminates design modification and ensures full functional compatibility.

For Surface-Mount Design Conversion

TLE42744GV50ATMA1 provides equivalent electrical performance in a TO-263-3 surface-mount package. This part retains the 400mA output current, 40V maximum input voltage, 0.5V dropout specification, and automotive AEC-Q100 qualification. Selection of this part requires PCB layout modification to accommodate the different package footprint but maintains all electrical characteristics and automotive compliance.

For Current-Limited Applications

LM2931AT-5.0G and LM2931T-5.0G from onsemi deliver 5V fixed output in TO-220-3 through-hole packaging with active product status. These parts are suitable only for applications requiring 100mA or less output current. The maximum input voltage is limited to 26V, and operating temperature range is -40°C to 125°C. These parts lack AEC-Q100 qualification and are not suitable for automotive applications requiring the original part's specifications.

For Higher Current Applications

LM340AT-5.0/NOPB, LM340T-5.0/NOPB, and LM7805CT/NOPB from Texas Instruments provide 1.5A output current in TO-220-3 through-hole packaging. These parts are suitable for applications where higher current capacity is required. Maximum input voltage is 35V, and operating temperature range is 0°C to 125°C. These parts lack automotive grade and AEC-Q100 qualification.

For Legacy or Constrained Applications

LM330T-5.0/NOPB from National Semiconductor provides 150mA output current in TO-220-3 through-hole packaging. This part is limited to 0°C to 70°C operating temperature and lacks automotive qualification. Selection is appropriate only for non-automotive applications with reduced current requirements.

Frequently Asked Questions (FAQ)

Q: Can TLE4274V50AKSA2 be used as a direct replacement for TLE4274 V50?

A: Yes. TLE4274V50AKSA2 is the active equivalent from Infineon Technologies with identical electrical specifications (5V output, 400mA current, 40V maximum input, 0.5V dropout), TO-220-3 through-hole packaging, automotive grade, and AEC-Q100 qualification. No design modification is required.

Q: What is the difference between TLE4274V50AKSA2 and TLE42744GV50ATMA1?

A: Both parts are from Infineon with identical electrical specifications and automotive qualification. The primary difference is packaging: TLE4274V50AKSA2 uses TO-220-3 through-hole, while TLE42744GV50ATMA1 uses TO-263-3 surface-mount. Selection depends on PCB assembly method and available board space.

Q: Can LM2931AT-5.0G replace TLE4274 V50 in automotive applications?

A: No. While LM2931AT-5.0G provides 5V output in TO-220-3 through-hole packaging, it is limited to 100mA output current (versus 400mA required), 26V maximum input voltage (versus 40V), and lacks AEC-Q100 automotive qualification. This part is unsuitable for the original application.

Q: Are LM340 series parts suitable replacements?

A: LM340AT-5.0/NOPB, LM340T-5.0/NOPB, and LM7805CT/NOPB provide higher current capacity (1.5A) in TO-220-3 through-hole packaging with 5V fixed output. These parts lack automotive grade and AEC-Q100 qualification. They are suitable only for non-automotive applications where higher current is beneficial or required.

Q: What is the operating temperature limitation of LM330T-5.0/NOPB?

A: LM330T-5.0/NOPB operates from 0°C to 70°C, which is narrower than the original TLE4274 V50 range of -40°C to 150°C. This part is unsuitable for applications requiring the full automotive temperature range.

Q: Does package type affect electrical performance?

A: No. TO-220-3 through-hole and TO-263-3 surface-mount packages of equivalent parts deliver identical electrical specifications. Package selection is determined by PCB assembly method, available board space, and thermal management requirements, not by electrical performance.

Q: What certifications are critical for automotive applications?

A: AEC-Q100 qualification is the primary certification for automotive-grade components. TLE4274V50AKSA2 and TLE42744GV50ATMA1 both maintain AEC-Q100 qualification. Alternative parts from onsemi and Texas Instruments lack this certification and are not suitable for automotive applications requiring the original part's compliance status.

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