SCD7812BTG Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The SCD7812BTG is a linear voltage regulator IC from onsemi designed for positive fixed 12V output at 1A current capacity in a TO-220-3 package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part delivers regulated 12V output with integrated over-current and over-temperature protection suitable for through-hole mounting applications.

Substiute Parts

SCD7812BTG

onsemiIn Stock: 2425SCD7812BTG Datasheet

Current PartRFQ

MC7812BTG

onsemiIn Stock: 45176MC7812BTG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SCD7812BTG is determined by strict equivalence across the following critical parameters:

• Output voltage configuration: 12V fixed positive output
• Output current rating: 1A minimum
• Input voltage tolerance: 35V maximum rating
• Package form factor: TO-220-3 through-hole mounting
• Operating temperature range: -40°C to 125°C
• Regulatory compliance: ROHS3 and REACH compliance status

The MC7812BTG qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. Both parts are manufactured by onsemi, share identical output specifications, and are housed in the same TO-220-3 package configuration.

Parameter Comparison

Engineering Selection Recommendations

The MC7812BTG is the qualified substitute for the obsolete SCD7812BTG. Selection is based on:

• Active product status: MC7812BTG maintains current manufacturing and supply chain availability
• Electrical equivalence: Identical output voltage, current rating, and input voltage specifications
• Package compatibility: Both parts use TO-220-3 through-hole mounting without modification to existing PCB designs
• Regulatory compliance: Both parts maintain ROHS3 and REACH compliance status, meeting current environmental standards
• Thermal performance: Matching operating temperature range ensures equivalent thermal behavior in system applications

Frequently Asked Questions (FAQ)

Q: Can MC7812BTG directly replace SCD7812BTG without PCB modifications?

A: Yes. Both parts share identical TO-220-3 package pinouts and through-hole mounting specifications. No PCB layout changes are required.

Q: Are there differences in protection features between these parts?

A: Both parts include thermal protection. SCD7812BTG specifies over-current and over-temperature protection. MC7812BTG specifies over-temperature and short-circuit protection. Both provide equivalent system-level protection for 1A output current applications.

Q: What is the primary reason for substitution?

A: SCD7812BTG is classified as obsolete. MC7812BTG is an active product with current manufacturing support and supply availability.

Q: Do both parts meet current environmental compliance requirements?

A: Yes. Both SCD7812BTG and MC7812BTG are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: Are there any electrical performance differences in dropout voltage or PSRR specifications?

A: Both parts specify 2V maximum dropout voltage at 1A typical operation. PSRR specifications differ slightly (60dB at 120Hz for SCD7812BTG versus 60dB at 1kHz for MC7812BTG), but both values fall within acceptable linear regulator performance ranges for 12V fixed output applications.