LM341T-5.0 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM341T-5.0 is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed 5V output applications with 500mA current capacity in a TO-220-3 package. This device is classified as Last Time Buy, indicating limited availability from the original manufacturer. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term production requirements.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	500mA
Input Voltage (Max)	35V
Quiescent Current (Iq)	4 mA
PSRR @ 120Hz	78dB
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature Range	-40°C ~ 125°C
Package	TO-220-3
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LM341T-5.0 is determined by the following critical parameters:

Primary Substitution Criteria:

Output voltage: 5V fixed
Output current capacity: 500mA minimum
Package type: TO-220-3 compatible
Input voltage rating: 35V maximum
Operating temperature range: -40°C to 125°C minimum
Protection features: Over temperature and short circuit protection required

Substitution Categories:

Direct Manufacturer Equivalent — Identical part number with different packaging designation or lead-free variant (LM341T-5.0/NOPB). Fully interchangeable with no design modifications required.

Parametric Equivalent — Parts from different manufacturers meeting all critical electrical parameters and package requirements. These include LM78M05CT/NOPB, MC78M05BTG, and MC78M05CTG. Electrical performance is equivalent within specified tolerances.

Manufacturer Recommended Alternatives — Higher current capacity variants (L7805ABV, L7805ACV) and alternative 500mA designs (L78M05CV, L78M05ABV, MC78M05ACTG) that exceed or match the original specifications. These provide enhanced capability or improved availability.

Parameter Comparison

Part Number	Manufacturer	Output Current	Iq (mA)	PSRR @ 120Hz	Protection Features	Temp Range	Product Status	Inventory
LM341T-5.0	Texas Instruments	500mA	4	78dB	OCP, OTP, SCP	-40 to 125°C	Last Time Buy	2,300 pcs
LM341T-5.0/NOPB	Texas Instruments	500mA	4	78dB	OCP, OTP, SCP	-40 to 125°C	Active	4,002 pcs
LM78M05CT/NOPB	Texas Instruments	500mA	3	78dB	OCP, OTP, SCP	-40 to 125°C	Active	34,100 pcs
LM78M05CT	onsemi	500mA	6	80dB	OTP, SCP	-40 to 125°C	Obsolete	1,591 pcs
MC78M05BTG	onsemi	500mA	—	80dB	OTP, SCP	-40 to 125°C	Active	1,373 pcs
MC78M05CTG	onsemi	500mA	—	80dB	OTP, SCP	0 to 125°C	Active	4,878 pcs
L78M05ABV	STMicroelectronics	500mA	6	62dB	OCP, OTP, SCP	-40 to 125°C	Active	23,375 pcs
L78M05CV	STMicroelectronics	500mA	6	62dB	OCP, OTP, SCP	0 to 125°C	Active	20,526 pcs
L7805ABV	STMicroelectronics	1.5A	6	68dB	OTP, SCP	-40 to 125°C	Active	130,821 pcs
L7805ACV	STMicroelectronics	1.5A	6	68dB	OTP, SCP	0 to 125°C	Active	19,349 pcs
MC78M05ACTG	onsemi	500mA	—	80dB	OTP, SCP	0 to 125°C	Obsolete	1,370 pcs

Engineering Selection Recommendations

Tier 1 — Direct Replacement (No Design Changes Required)

LM341T-5.0/NOPB is the primary substitute. Manufactured by Texas Instruments with identical electrical specifications, this part carries Active product status and ROHS3 compliance. It provides the highest compatibility with existing designs and documentation.

Tier 2 — Parametric Equivalents (Verified Compatibility)

LM78M05CT/NOPB from Texas Instruments meets all critical parameters with improved quiescent current performance (3mA vs 4mA). This part has the highest inventory availability (34,100 units) and Active status, making it suitable for new production runs.

MC78M05CTG and MC78M05BTG from onsemi provide equivalent 500mA output with enhanced PSRR (80dB). Both are Active products with TO-220-3 package compatibility. MC78M05CTG has higher inventory (4,878 units) and is preferred over the BTG variant.

Tier 3 — Higher Current Capacity Alternatives

L7805ABV and L7805ACV from STMicroelectronics deliver 1.5A output capacity, exceeding the original 500mA specification. These parts are suitable for designs requiring additional current margin or future scaling. L7805ABV supports the full -40 to 125°C temperature range and has exceptional inventory availability (130,821 units).

Tier 4 — Avoid

LM78M05CT (onsemi) and MC78M05ACTG are marked Obsolete and should not be selected for new designs despite current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can LM341T-5.0/NOPB be used as a direct replacement for LM341T-5.0?

A: Yes. The /NOPB designation indicates lead-free (no-lead) packaging. Both parts are manufactured by Texas Instruments with identical electrical specifications and TO-220-3 package. No circuit modifications are required.

Q: What is the difference between 500mA and 1.5A output variants?

A: The L7805 series (1.5A) and L78M05 series (500mA) share identical 5V output voltage and package form factor. The 1.5A variants provide higher current capacity for applications requiring greater load current. If your circuit draws less than 500mA, both are functionally equivalent. If future expansion requires higher current, the 1.5A variants offer headroom without redesign.

Q: Are onsemi MC78M05 parts compatible with Texas Instruments LM341T-5.0?

A: Yes, within specified parameters. MC78M05CTG and MC78M05BTG meet the 5V output, 500mA current, and TO-220-3 package requirements. Both provide equivalent PSRR (80dB) and protection features. Operating temperature ranges differ slightly (0 to 125°C vs -40 to 125°C), which may affect suitability for extended temperature applications.

Q: Why do some parts show lower quiescent current (Iq)?

A: Quiescent current represents the regulator's internal power consumption when no load is connected. Lower Iq (3mA in LM78M05CT/NOPB vs 4mA in LM341T-5.0) indicates improved efficiency in standby conditions. This difference is negligible in most applications but beneficial in battery-powered or low-power standby scenarios.

Q: What does PSRR (Power Supply Rejection Ratio) indicate?

A: PSRR measures the regulator's ability to reject noise from the input power supply. Higher PSRR values (80dB in onsemi parts vs 78dB in Texas Instruments) indicate better noise filtering. For most applications, both values are acceptable. Noise-sensitive analog circuits may benefit from higher PSRR variants.

Q: Can I use L78M05CV instead of L78M05ABV?

A: Both are 500mA STMicroelectronics regulators with identical electrical performance. The difference is operating temperature range: L78M05ABV supports -40 to 125°C, while L78M05CV supports 0 to 125°C. Select L78M05ABV for extended low-temperature applications; L78M05CV is suitable for standard industrial temperature ranges.

Q: Why is inventory quantity important in part selection?

A: Higher inventory availability reduces lead time risk and supports sustained production. LM78M05CT/NOPB (34,100 units) and L7805ABV (130,821 units) offer superior supply security compared to alternatives with lower stock levels. For long-term production commitments, prioritize parts with higher inventory.

Q: Are all listed parts ROHS3 compliant?

A: Most are ROHS3 compliant. Verify compliance status for each selected part, as some onsemi variants show "Not Applicable" MSL designation. All parts listed meet REACH and EAR99 export compliance requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message