MC7805AECT Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The MC7805AECT is a linear voltage regulator IC manufactured by onsemi, designed to provide a fixed positive 5V 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 new designs and production continuity. The MC7805AECT serves as a positive fixed output regulator suitable for power management applications requiring stable 5V regulation from input sources up to 35V.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Voltage - Input (Max)	35V
Current - Output	1A
Voltage Dropout (Max)	2V @ 1A (Typ)
Current - Quiescent (Iq)	6 mA
PSRR	68dB (120Hz)
Protection Features	Over Temperature, Short Circuit
Operating Temperature	0°C ~ 125°C
Package / Case	TO-220-3
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution for the MC7805AECT is determined by the following critical parameters: output voltage (5V fixed), maximum output current (1A minimum), input voltage rating (35V maximum), package type (TO-220-3), and protection features (over temperature and short circuit). Parts are grouped into two categories:

Category 1: Direct Parametric Equivalents (1A Output) Parts matching all electrical specifications including 1A output current, 5V fixed output, 35V maximum input, and identical protection features. These parts are interchangeable in applications where the MC7805AECT was originally specified.

Category 2: Reduced Current Alternatives (500mA Output) Parts with 500mA maximum output current instead of 1A. These are suitable only for applications where load current does not exceed 500mA and where the reduced current capacity is acceptable.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Current	Voltage Dropout (Max)	Quiescent Current (Iq)	PSRR	Operating Temperature	RoHS Status
MC7805AECT	onsemi	Obsolete	1A	2V @ 1A (Typ)	6 mA	68dB (120Hz)	0°C ~ 125°C	Not Specified
MC7805BTG	onsemi	Active	1A	2V @ 1A (Typ)	8 mA	68dB (120Hz)	-40°C ~ 125°C	ROHS3 Compliant
MC7805ACTG	onsemi	Active	1A	2V @ 1A (Typ)	6 mA	83dB (120Hz)	0°C ~ 125°C	ROHS3 Compliant
MC7805CTG	onsemi	Active	1A	2V @ 1A (Typ)	6.5 mA	83dB (120Hz)	0°C ~ 125°C	ROHS3 Compliant
NCV7805BTG	onsemi	Obsolete	1A	2V @ 1A (Typ)	8 mA	83dB (120Hz)	-40°C ~ 125°C	ROHS3 Compliant
L7805ABV	STMicroelectronics	Active	1.5A	2V @ 1A (Typ)	6 mA	68dB (120Hz)	-40°C ~ 125°C	ROHS3 Compliant
L7805ACV	STMicroelectronics	Active	1.5A	2V @ 1A (Typ)	6 mA	68dB (120Hz)	0°C ~ 125°C	ROHS3 Compliant
L7805CV	UMW	Active	1.2A	Not Specified	6 mA	Not Specified	-40°C ~ 105°C	ROHS3 Compliant
MC78M05ACTG	onsemi	Obsolete	500mA	Not Specified	Not Specified	80dB (120Hz)	0°C ~ 125°C	ROHS3 Compliant
MC78M05BTG	onsemi	Active	500mA	Not Specified	Not Specified	80dB (120Hz)	-40°C ~ 125°C	ROHS3 Compliant
MC78M05CTG	onsemi	Active	500mA	Not Specified	Not Specified	80dB (120Hz)	0°C ~ 125°C	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement: MC7805ACTG and MC7805CTG are the preferred active substitutes for the obsolete MC7805AECT. Both parts are manufactured by onsemi, maintain identical 1A output current and 5V fixed output specifications, and are ROHS3 compliant. MC7805ACTG matches the original quiescent current specification of 6 mA, while MC7805CTG provides marginally higher quiescent current at 6.5 mA. Both support the full 0°C to 125°C operating temperature range of the original part.

Alternative from Active Inventory: MC7805BTG is an active onsemi part with 1A output capacity and identical electrical specifications. This part extends the operating temperature range to -40°C to 125°C and carries higher quiescent current at 8 mA compared to the original 6 mA specification.

Cross-Manufacturer Alternatives: L7805ACV and L7805ABV from STMicroelectronics provide 1.5A output current, exceeding the original 1A specification. These parts are suitable for applications where additional current headroom is beneficial. L7805ACV maintains the 0°C to 125°C temperature range, while L7805ABV extends to -40°C to 125°C. L7805CV from UMW provides 1.2A output capacity with extended temperature range to -40°C to 105°C.

Reduced Current Alternatives: MC78M05BTG and MC78M05CTG provide 500mA output current. These parts are suitable only for applications where the load current requirement does not exceed 500mA. MC78M05BTG supports -40°C to 125°C operation, while MC78M05CTG maintains 0°C to 125°C operation.

Frequently Asked Questions (FAQ)

Q: Can MC7805BTG directly replace MC7805AECT? A: Yes. MC7805BTG is an active onsemi part with identical 1A output current, 5V fixed output, and 35V maximum input voltage. The primary difference is extended operating temperature range (-40°C to 125°C versus 0°C to 125°C) and slightly higher quiescent current (8 mA versus 6 mA). Both are TO-220-3 through-hole packages with identical pinout.

Q: What is the difference between MC7805ACTG and MC7805CTG? A: Both are active onsemi parts with identical electrical performance for the MC7805AECT application. MC7805ACTG specifies 6 mA quiescent current matching the original part, while MC7805CTG specifies 6.5 mA. Both support 0°C to 125°C operation and 1A output current. Selection between these parts depends on quiescent current budget requirements.

Q: Can I use L7805ACV instead of MC7805AECT? A: Yes, with consideration for higher output current capability. L7805ACV is a STMicroelectronics part providing 1.5A output versus the original 1A specification. This higher current capacity makes it suitable for the MC7805AECT application. Operating temperature range is 0°C to 125°C, matching the original part. Package and pinout are identical TO-220-3.

Q: Are MC78M05 series parts suitable replacements? A: MC78M05 series parts (MC78M05BTG, MC78M05CTG) provide only 500mA output current compared to the original 1A specification. These parts are suitable only for applications where load current does not exceed 500mA. Do not use these parts in applications requiring the full 1A output capacity of the MC7805AECT.

Q: What does ROHS3 compliance mean for substitution? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements. All active substitute parts listed are ROHS3 compliant, making them suitable for applications requiring RoHS compliance. The original MC7805AECT does not specify RoHS status.

Q: Does package type affect substitution? A: No. All substitute parts listed use the TO-220-3 through-hole package with identical pinout and mechanical dimensions. Package compatibility is maintained across all recommended substitutes.

Q: Can NCV7805BTG replace MC7805AECT? A: NCV7805BTG is an automotive-grade part with AEC-Q100 qualification. While electrically compatible with 1A output and 5V fixed output, this part is obsolete. Active alternatives such as MC7805ACTG or MC7805CTG are preferred for new designs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message