MC7810ECT Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The MC7810ECT is a linear voltage regulator IC manufactured by onsemi, designed to provide a fixed positive 10V output at 1A current capacity in a TO-220-3 package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MC7810ECT serves applications requiring stable 10V regulation from input sources up to 35V, with integrated over-temperature and short-circuit protection.

Substiute Parts

MC7810ECT

onsemiIn Stock: 776MC7810ECT Datasheet

Current PartRFQ

L78S10CV

STMicroelectronicsIn Stock: 10101L78S10CV Datasheet

SimilarRFQ

UA7810CKCS

Texas InstrumentsIn Stock: 1816UA7810CKCS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MC7810ECT are qualified 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 topology
• Operating temperature range overlap (minimum 0°C to 125°C)
• Protection against over-temperature and short-circuit conditions
• Input voltage rating of 28V or higher

The two substitute parts identified meet these core criteria while offering enhanced specifications in current capacity and additional protection features.

Parameter Comparison

Engineering Selection Recommendations

Selection of substitute parts should be based on application-specific requirements and component availability:

The L78S10CV from STMicroelectronics provides a direct functional upgrade with doubled output current capacity (2A versus 1A) while maintaining the same 35V maximum input rating and TO-220-3 package footprint. This part is suitable for applications where increased current headroom is beneficial. The device is obsolete, consistent with the main part status.

The UA7810CKCS from Texas Instruments offers 1.5A output current with enhanced protection features including reverse polarity protection. This part carries a Last Time Buy status, indicating limited future availability. The maximum input voltage is rated at 28V, which is lower than the MC7810ECT's 35V rating and must be verified against application requirements. This device includes ROHS3 compliance certification.

Both substitute parts maintain the fixed 10V output voltage, TO-220-3 package configuration, and through-hole mounting required for direct replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the L78S10CV directly replace the MC7810ECT in all applications?

A: The L78S10CV is mechanically and electrically compatible as a direct replacement. The higher current rating (2A versus 1A) and extended operating temperature range (0°C to 150°C) represent improvements over the original specification. Verify that your application's input voltage does not exceed 35V and that thermal management is adequate for the selected device.

Q: What is the difference between the UA7810CKCS and MC7810ECT?

A: The UA7810CKCS provides 1.5A output current compared to the MC7810ECT's 1A, with additional reverse polarity protection. The maximum input voltage is 28V rather than 35V. Both devices use the TO-220-3 package and provide 10V fixed output. Confirm that your input voltage supply does not exceed 28V before selecting this substitute.

Q: Are all three parts pin-compatible?

A: Yes. The MC7810ECT, L78S10CV, and UA7810CKCS all use the TO-220-3 package with identical pin assignments: input, ground, and output. No PCB modifications are required for substitution.

Q: Which substitute part should I choose for new designs?

A: Selection depends on current requirements and input voltage constraints. For applications requiring up to 2A output current with input voltages up to 35V, the L78S10CV is suitable. For applications with input voltages limited to 28V and requiring up to 1.5A output current, the UA7810CKCS is appropriate. Both parts are obsolete or in Last Time Buy status; verify long-term availability with your supplier.

Q: Do these substitute parts require different PCB layouts?

A: No. All three parts use identical TO-220-3 package dimensions and pin configurations. Existing PCB designs require no modification for component substitution.