UA78L08ACLPRE3 Equivalent & Substitute Parts

Part Overview

The UA78L08ACLPRE3 is a linear voltage regulator IC from Texas Instruments, delivering a fixed positive 8V output at 100mA in a TO-92-3 through-hole package. This device is classified as Last Time Buy, indicating discontinued production status. Finding equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring 8V fixed output regulation.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	8V
Output Current	100mA
Input Voltage (Max)	23V
Dropout Voltage (Max)	1.7V @ 40mA
Output Configuration	Positive Fixed
Package Type	TO-92-3 (Through Hole)
Operating Temperature	0°C ~ 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, Short Circuit

Substitute Part Grouping Explanation

Substitution for the UA78L08ACLPRE3 is determined by the following critical parameters:

Fixed output voltage of 8V
Output current capability of 100mA or greater
Through-hole or surface-mount package compatibility with application requirements
Input voltage rating of 23V or higher
Protection features including over-current and over-temperature protection
Operating temperature range encompassing 0°C to 125°C

Substitute parts are grouped into two categories:

Parametric Equivalents: Parts with identical electrical specifications and TO-92-3 through-hole packaging, enabling direct pin-for-pin replacement.

Functional Alternatives: Parts with enhanced specifications (higher input voltage, lower dropout voltage, or higher output current) in alternative packages, suitable for designs with flexibility in form factor or performance requirements.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Package	Operating Temp	Product Status
UA78L08ACLPRE3	Texas Instruments	8V	100mA	23V	1.7V @ 40mA	TO-92-3	0°C ~ 125°C	Last Time Buy
UA78L08ACLPR	Texas Instruments	8V	100mA	23V	1.7V @ 40mA	TO-92-3	0°C ~ 125°C	Last Time Buy
L78L08ABZ-AP	STMicroelectronics	8V	100mA	30V	Not specified	TO-92-3	-40°C ~ 125°C	Active
L78L08ABZTR	STMicroelectronics	8V	100mA	30V	Not specified	TO-92-3	-40°C ~ 125°C	Active
L78L08ACZTR	STMicroelectronics	8V	100mA	30V	Not specified	TO-92-3	0°C ~ 125°C	Active
MC78L08ABPG	onsemi	8V	100mA	30V	Not specified	TO-92-3	-40°C ~ 125°C	Active
MC78L08ABPRAG	onsemi	8V	100mA	30V	Not specified	TO-92-3	-40°C ~ 125°C	Active
MC78L08ABPRPG	onsemi	8V	100mA	30V	Not specified	TO-92-3	-40°C ~ 125°C	Active
MC78L08ACPG	onsemi	8V	100mA	30V	Not specified	TO-92-3	0°C ~ 125°C	Active
MC78L08ACPRAG	onsemi	8V	100mA	30V	Not specified	TO-92-3	0°C ~ 125°C	Active
TPS7B8480QWDRBRQ1	Texas Instruments	8V	150mA	40V	0.225V @ 150mA	8-SON (3x3)	-40°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents)

UA78L08ACLPR from Texas Instruments serves as the direct parametric equivalent with identical electrical specifications and TO-92-3 packaging. This part maintains Last Time Buy status but provides immediate compatibility for existing designs.

Active Production Alternatives (Through-Hole TO-92-3)

STMicroelectronics L78L08 series (L78L08ABZ-AP, L78L08ABZTR, L78L08ACZTR) and onsemi MC78L08 series (MC78L08ABPG, MC78L08ABPRAG, MC78L08ABPRPG, MC78L08ACPG, MC78L08ACPRAG) are all in active production status. These parts meet or exceed the electrical requirements of the UA78L08ACLPRE3 with higher input voltage ratings (30V) and extended temperature ranges in certain variants. All maintain TO-92-3 through-hole packaging for direct board-level substitution.

Enhanced Performance Alternative (Surface Mount)

TPS7B8480QWDRBRQ1 from Texas Instruments offers enhanced specifications including 150mA output current, 40V input voltage rating, and significantly lower dropout voltage (0.225V @ 150mA). This part is qualified to AEC-Q100 automotive standards and operates across -40°C to 150°C. The 8-SON (3x3) surface-mount package requires PCB redesign but provides superior performance characteristics for applications with design flexibility.

Frequently Asked Questions (FAQ)

Q: Can I use MC78L08ABPRAG as a direct replacement for UA78L08ACLPRE3?

A: Yes. Both parts deliver 8V fixed output at 100mA in TO-92-3 through-hole packages. MC78L08ABPRAG is in active production and has higher input voltage rating (30V vs 23V), making it functionally compatible. Pin configuration and package dimensions are identical.

Q: What is the difference between L78L08ABZ-AP and L78L08ABZTR?

A: Both are STMicroelectronics L78L08 variants with identical electrical specifications and TO-92-3 packaging. The primary difference is packaging format: ABZ-AP is supplied in cut tape, while ABZTR is supplied in tape and reel. Electrical performance is equivalent.

Q: Why would I choose TPS7B8480QWDRBRQ1 over the TO-92-3 alternatives?

A: TPS7B8480QWDRBRQ1 provides higher output current (150mA vs 100mA), lower dropout voltage (0.225V vs 1.7V), and wider input voltage range (40V vs 23-30V). The 8-SON surface-mount package is smaller and more suitable for modern PCB designs. This part is appropriate for applications requiring enhanced performance specifications and automotive qualification.

Q: Are all substitute parts RoHS3 compliant?

A: All TO-92-3 through-hole alternatives (STMicroelectronics L78L08 series and onsemi MC78L08 series) are RoHS3 compliant. TPS7B8480QWDRBRQ1 has RoHS status listed as not applicable due to its automotive qualification classification.

Q: What is the operating temperature difference between variants?

A: UA78L08ACLPRE3 operates 0°C to 125°C. STMicroelectronics L78L08ABZ-AP and L78L08ABZTR extend to -40°C. onsemi MC78L08ABPG, MC78L08ABPRAG, and MC78L08ABPRPG also extend to -40°C. onsemi MC78L08ACPG and MC78L08ACPRAG, plus STMicroelectronics L78L08ACZTR, maintain 0°C to 125°C. TPS7B8480QWDRBRQ1 extends to -40°C to 150°C with automotive qualification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message