LM7806ACT Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM7806ACT is a linear voltage regulator IC manufactured by onsemi, designed to provide a fixed positive 6V output at 1A current capacity in a TO-220-3 through-hole package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. The LM7806ACT serves applications requiring stable 6V regulation with integrated over-temperature and short-circuit protection.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM7806ACT
Manufacturer	onsemi
Output Voltage (Fixed)	6V
Output Current	1A
Input Voltage (Max)	35V
Voltage Dropout (Max)	2V @ 1A (Typ)
Quiescent Current	8 mA
PSRR	73dB (120Hz)
Operating Temperature Range	0°C ~ 125°C
Package / Case	TO-220-3
Mounting Type	Through Hole
Protection Features	Over Temperature, Short Circuit
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the LM7806ACT is determined by the following critical parameters:

Output Voltage: Must be fixed at 6V
Output Current Capacity: Minimum 1A (equal or greater)
Input Voltage Rating: Maximum 35V or higher
Package Type: TO-220-3 through-hole configuration
Output Configuration: Positive fixed output
Protection Features: Over-temperature and short-circuit protection required

Substitute parts are grouped into two categories:

Direct Equivalents (identical electrical and mechanical specifications): MC7806CTG, MC7806ACTG

Functional Alternatives (compatible electrical performance with minor parameter variations): MC7806BTG, L7806CV-DG, MC78M06CTG

All substitute parts maintain the same output voltage, package footprint, and protection architecture, ensuring drop-in compatibility for circuit board designs.

Parameter Comparison

Parameter	LM7806ACT	MC7806CTG	MC7806ACTG	MC7806BTG	L7806CV-DG	MC78M06CTG
Manufacturer	onsemi	onsemi	onsemi	onsemi	STMicroelectronics	onsemi
Output Voltage	6V	6V	6V	6V	6V	6V
Output Current	1A	1A	1A	1A	1.5A	500mA
Input Voltage (Max)	35V	35V	35V	35V	35V	35V
Voltage Dropout (Max)	2V @ 1A	2V @ 1A	2V @ 1A	2V @ 1A	2V @ 1A	—
Quiescent Current	8 mA	8 mA	6 mA	8 mA	8 mA	8 mA
PSRR (120Hz)	73dB	65dB	65dB	65dB	59dB	80dB
Operating Temperature	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	-40°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MC7806CTG and MC7806ACTG are the primary substitutes for the LM7806ACT. Both are onsemi products with identical electrical specifications and TO-220-3 packaging. MC7806ACTG offers marginally lower quiescent current (6 mA vs. 8 mA). Both are ROHS3 compliant, addressing modern environmental and regulatory requirements that the obsolete LM7806ACT does not specify.

MC7806BTG extends the operating temperature range to -40°C ~ 125°C, suitable for applications requiring enhanced low-temperature performance. PSRR is reduced to 65dB compared to the LM7806ACT's 73dB.

L7806CV-DG (STMicroelectronics) provides 1.5A output current capacity, offering increased current headroom for designs approaching the 1A limit. PSRR performance is lower at 59dB. This part is suitable when higher current delivery is required within the same voltage regulation framework.

MC78M06CTG is a lower-current variant (500mA) with superior PSRR performance (80dB). This part is appropriate only for applications with reduced current requirements below 1A.

All substitute parts maintain REACH compliance and EAR99 export classification consistent with the original LM7806ACT.

Frequently Asked Questions (FAQ)

Q: Can MC78M06CTG replace the LM7806ACT in all applications?

A: No. MC78M06CTG is rated for 500mA maximum output current, while the LM7806ACT is rated for 1A. Use MC78M06CTG only in circuits where load current does not exceed 500mA.

Q: What is the difference between MC7806CTG and MC7806ACTG?

A: Both are direct equivalents with identical electrical performance. MC7806ACTG has slightly lower quiescent current (6 mA vs. 8 mA). Both are pin-compatible and functionally interchangeable in the LM7806ACT application.

Q: Is L7806CV-DG a suitable replacement for the LM7806ACT?

A: Yes, with considerations. L7806CV-DG is manufactured by STMicroelectronics and provides 1.5A output current (exceeding the 1A requirement). PSRR is reduced to 59dB. The part is mechanically and electrically compatible for standard 6V regulation applications. Higher current capacity makes it suitable for designs with potential load growth.

Q: Why do substitute parts show ROHS3 compliance while the LM7806ACT does not?

A: The LM7806ACT is obsolete and predates modern RoHS documentation standards. Current substitute parts from onsemi and STMicroelectronics are manufactured to ROHS3 compliance, meeting contemporary environmental regulations.

Q: Can I use MC7806BTG in applications requiring 0°C minimum operating temperature?

A: Yes. MC7806BTG is rated for -40°C ~ 125°C, which exceeds the 0°C ~ 125°C requirement of the LM7806ACT. It is suitable for all temperature ranges specified for the original part and extends capability to lower temperatures.

Q: Are all substitute parts available in TO-220-3 packaging?

A: Yes. All listed substitute parts use TO-220-3 through-hole packaging, ensuring mechanical compatibility with existing PCB designs without layout modifications.

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