LR7805D
LRC
Needs validationlow risk
Strong alternative in the same TO-252 package with matching key specs, but a narrower temperature range.
Best Alternatives to CJ78D05
CJ78D05 is a common 5V, 1A linear voltage regulator in a TO-252 (DPAK) package. Finding a suitable alternative involves matching the 35V maximum input voltage and ensuring package compatibility for a drop-in fit.
AI replacement insight
Package riskhigh
Most alternatives are in different packages (SOT-223, TO-220, TO-263) requiring a new PCB layout.
Electrical riskmedium
Some candidates have a lower max input voltage (15V/18V vs 35V) or a narrower temperature range.
Sourcing risklow
7805-type regulators are widely available from many manufacturers, providing many functional options.
Can it be replaced directly?
Direct replacement for CJ78D05 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
For a near drop-in replacement, focus on candidates in a TO-252/DPAK package like LR7805D, but verify the operating temperature. For new designs, consider modern LDOs for better performance if a lower input voltage is acceptable.
Main risk
The primary risk is package incompatibility, as many functional alternatives require a board redesign. The second risk is a reduced maximum input voltage or operating temperature range.
Recommended alternatives
6Alternative comparison matrix
| Feature / factor | CJ78D05 | LR7805D | L7805CV-HXY | LM7805 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | TO-252-2L | DPAK (TO-252) | TO-220S | TO-263 | DPAK (TO-252) / TO-220S / TO-263 / TO-220-3 — Package is a strong match for TO-252-2L.; L7805CV-HXY: Through-hole package requires board redesign.; LM7805: Larger D2PAK package may not fit TO-252 footprint.; LM7805CTG: Through-hole package requires board redesign. |
| Temperature | -25°C to +125°C | 0°C to +150°C | -25°C to +125°C | 0°C to 125°C | 0°C to +150°C / -25°C to +125°C / 0°C to 125°C — Operating range starts at 0°C, not suitable for sub-zero applications.; L7805CV-HXY: Operating temperature range matches.; LM7805: Operating range starts at 0°C, narrower than target.; LM7805CTG: Operating range starts at 0°C, narrower than target. |
| Current | 1.0A | 1.0A | - | - | 1.0A / 1.5A — Output current matches.; LM7805CTG: Higher output current is a safe upgrade. |
| Voltage | 35V | 35V | 35V | 35V | 35V — Max input voltage matches.; L7805CV-HXY: Max input voltage matches.; LM7805: Max input voltage matches. |
Application & sourcing insights
Questions & answers
Verified drop-in options for CJ78D05 are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.