SC7805CTG Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The SC7805CTG is a linear voltage regulator IC manufactured by onsemi, designed to provide a fixed positive 5V output at 1A current capacity. This device features a TO-220-3 package configuration suitable for through-hole mounting applications. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

SC7805CTG

onsemiIn Stock: 1026SC7805CTG Datasheet

Current PartRFQ

LT1085CT-5#PBF

Analog Devices Inc.In Stock: 1237LT1085CT-5#PBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC7805CTG is determined by the following critical parameters:

• Output voltage specification: 5V fixed positive output
• Package compatibility: TO-220-3 through-hole mounting
• Output current capability: minimum 1A required
• Input voltage tolerance: maximum 25V
• Operating temperature range: 0°C ~ 125°C
• Regulatory compliance: ROHS3 Compliant

The LT1085CT-5#PBF qualifies as a functional substitute based on matching output voltage (5V fixed), identical package type (TO-220-3), compatible operating temperature range (0°C ~ 125°C), and superior current output capability (3A exceeds the 1A requirement). Both devices maintain ROHS3 compliance and are suitable for through-hole PCB assembly.

Parameter Comparison

Engineering Selection Recommendations

The LT1085CT-5#PBF is suitable as a direct substitute for the SC7805CTG in applications requiring a 5V fixed positive output linear regulator in TO-220-3 package format. The substitute part maintains active product status with Analog Devices Inc., ensuring long-term availability and supply chain continuity compared to the obsolete SC7805CTG. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The LT1085CT-5#PBF provides enhanced current output capability (3A versus 1A), which offers design margin in power delivery applications. The maximum input voltage specification of the substitute (20V) remains adequate for most standard linear regulator input ranges, though designs operating near the SC7805CTG maximum of 25V input should be evaluated for compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LT1085CT-5#PBF directly replace the SC7805CTG without PCB modifications?

A: Yes. Both devices use identical TO-220-3 package pinouts and pin assignments, enabling direct socket substitution without PCB layout changes.

Q: What is the primary reason for substituting the SC7805CTG?

A: The SC7805CTG is classified as obsolete. The LT1085CT-5#PBF is an active product from Analog Devices Inc., providing assured long-term availability and manufacturing support.

Q: Are there any electrical performance differences between these regulators?

A: The LT1085CT-5#PBF provides higher output current capability (3A versus 1A) and includes over-temperature protection. The maximum input voltage differs (20V versus 25V), which may affect designs operating at the upper input voltage limit.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SC7805CTG and LT1085CT-5#PBF are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: Is the LT1085CT-5#PBF available in the same packaging format?

A: Yes. The LT1085CT-5#PBF is supplied in TO-220-3 package configuration, identical to the SC7805CTG, supporting through-hole PCB assembly processes.