BA78M12CP-E2 Equivalent & Substitute Parts

Part Overview

The BA78M12CP-E2 is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed to provide a fixed positive 12V output at 500mA. This device is classified as a Power Management (PMIC) component and is packaged in TO-220CP-3 (cropped leads) configuration. The BA78M12CP-E2 is currently listed as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

BA78M12CP-E2

Rohm SemiconductorIn Stock: 1223BA78M12CP-E2 Datasheet

Current PartRFQ

L78M12CV

STMicroelectronicsIn Stock: 8851L78M12CV Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BA78M12CP-E2 is determined by the following critical electrical and mechanical parameters:

• Fixed output voltage of 12V
• Output current capability of 500mA minimum
• Through-hole mounting configuration
• TO-220 package family compatibility
• Positive fixed output configuration
• Over-current and over-temperature protection features
• RoHS3 compliance

The L78M12CV from STMicroelectronics meets these substitution criteria. Both devices share identical output voltage (12V) and current rating (500mA), operate as single positive fixed regulators, include thermal and current protection, and are housed in compatible TO-220 package variants. The L78M12CV maintains RoHS3 compliance and offers active product status with higher maximum input voltage rating (35V vs 27V).

Parameter Comparison

Engineering Selection Recommendations

The L78M12CV is a direct functional substitute for the BA78M12CP-E2 based on matching electrical specifications and package compatibility. The L78M12CV offers the advantage of active product status, ensuring continued availability and supply chain reliability. Both devices maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

The L78M12CV provides enhanced input voltage tolerance (35V maximum vs 27V), offering improved design margin in applications with variable input supplies. The addition of short-circuit protection in the L78M12CV provides supplementary circuit protection beyond the original device specification.

Pin-to-pin compatibility exists between the BA78M12CP-E2 and L78M12CV within TO-220 package families, though physical lead cropping differences between TO-220CP-3 and standard TO-220 packaging should be evaluated for specific PCB layout requirements.

Frequently Asked Questions (FAQ)

Q: Can the L78M12CV directly replace the BA78M12CP-E2 in existing designs?

A: Yes. Both devices provide identical 12V fixed output at 500mA with matching pin configurations in the TO-220 package family. Physical lead geometry differences (cropped vs standard) require PCB layout verification but do not affect electrical functionality.

Q: What is the primary reason for substitution?

A: The BA78M12CP-E2 is obsolete. The L78M12CV is an active product from a major manufacturer, ensuring long-term availability and supply continuity.

Q: Are there thermal or performance differences between these devices?

A: Both devices specify 6mA quiescent current and include thermal protection. The L78M12CV accepts higher maximum input voltage (35V vs 27V), providing greater input supply flexibility. Operating temperature ranges differ: BA78M12CP-E2 operates -40°C to 85°C, while L78M12CV operates 0°C to 125°C.

Q: Do both devices meet current compliance standards?

A: Yes. Both the BA78M12CP-E2 and L78M12CV are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What protection features are included?

A: The BA78M12CP-E2 includes over-current and over-temperature protection. The L78M12CV includes these features plus short-circuit protection, offering enhanced circuit safeguarding.

Q: Are there packaging considerations for PCB assembly?

A: The BA78M12CP-E2 uses TO-220CP-3 (cropped leads) while the L78M12CV uses standard TO-220-3 packaging. Lead geometry differences may require PCB footprint adjustment, though both are through-hole mounted devices.