LM7810ACT Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM7810ACT is a linear voltage regulator IC manufactured by onsemi, designed to provide a fixed positive 10V output at 1A maximum current. This device is classified as a Power Management (PMIC) component and is packaged in a TO-220-3 through-hole configuration. The product status is obsolete, making identification of compatible substitute parts essential for ongoing system support, maintenance, and new design implementations where this output voltage and current rating are required.

Substiute Parts

LM7810ACT

onsemiIn Stock: 1429LM7810ACT Datasheet

Current PartRFQ

L78S10CV

STMicroelectronicsIn Stock: 10101L78S10CV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM7810ACT are identified based on the following critical parameters that determine functional compatibility:

• Fixed output voltage of 10V
• Through-hole TO-220-3 package configuration
• Positive output configuration
• Single regulator output
• Maximum input voltage of 35V or greater
• Output current capability of 1A or higher
• Operating temperature range that encompasses or exceeds 0°C ~ 125°C
• Protection features including over-temperature and short-circuit protection

The L78S10CV from STMicroelectronics meets these substitution criteria. While it provides enhanced output current capability (2A versus 1A) and extended operating temperature range (0°C ~ 150°C), these represent improvements over the original specification and do not compromise compatibility in applications designed for the LM7810ACT.

Parameter Comparison

Engineering Selection Recommendations

The L78S10CV is a direct functional substitute for the LM7810ACT in applications requiring a fixed 10V positive linear regulator output. Both devices are obsolete, indicating that component sourcing from existing inventory is the primary availability path.

The L78S10CV provides superior specifications in three areas: output current capability is doubled (2A versus 1A), operating temperature range is extended to 150°C, and protection features include over-current protection in addition to over-temperature and short-circuit protection. These enhancements make the L78S10CV suitable for replacement in existing designs without circuit modification.

The LM7810ACT exhibits higher power supply rejection ratio (PSRR) at 71dB compared to the L78S10CV at 47dB. In applications where noise rejection is critical, this difference should be evaluated against the availability and cost of substitute inventory.

Both devices carry REACH Unaffected status and are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Frequently Asked Questions (FAQ)

Q: Can the L78S10CV replace the LM7810ACT in my existing circuit?

A: Yes. Both devices provide identical fixed 10V output voltage, operate from the same maximum input voltage (35V), use the same TO-220-3 package, and include compatible protection features. The L78S10CV's higher current rating (2A) and extended temperature range represent improvements that do not affect compatibility.

Q: What is the difference in PSRR between these two regulators?

A: The LM7810ACT provides 71dB PSRR at 120Hz, while the L78S10CV provides 47dB PSRR at 120Hz. This 24dB difference indicates the LM7810ACT offers superior rejection of power supply noise. Applications sensitive to supply noise should evaluate this specification against component availability.

Q: Are both devices still in production?

A: No. Both the LM7810ACT and L78S10CV are classified as obsolete products. Component selection must be based on available inventory from authorized distributors.

Q: Do these regulators require the same PCB layout and thermal management?

A: Both devices use the TO-220-3 package and share identical pin configuration. The L78S10CV's higher current rating (2A) may allow operation at lower junction temperatures in applications drawing maximum current, potentially reducing thermal management requirements compared to the LM7810ACT at 1A.

Q: What protection features does each regulator include?

A: The LM7810ACT includes over-temperature and short-circuit protection. The L78S10CV includes over-current, over-temperature, and short-circuit protection. The additional over-current protection in the L78S10CV provides enhanced fault tolerance.