What risks should I check before replacing CJ78L05?

Check TO-92 pinout, 5 V output, 30 V input rating, 100 mA load, dropout, and operating temperature.

CJ78L05 Alternatives, Datasheet & Cross Reference | Jiangsu Changjing Electronics Technology Co., Ltd.

CJ78L05 is a 5 V, 100 mA positive TO-92 regulator. The best candidates need pinout and temperature review before substitution.

AI replacement insight

Electrical riskmedium

Check Vin, load current, dropout, and temp.

Package riskmedium

TO-92 text matches for some, pinout does not.

Firmware risklow

No firmware interface for this regulator.

Sourcing riskmedium

Lifecycle fields are mixed or blank.

Can it be replaced directly?

Direct replacement for CJ78L05 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Start with CJ78L05C-TAB-ABG, then verify TO-92 pinout and 150 C need.

Main risk

TO-92 pin functions are not verified.

Recommended alternatives

ST 5 V TO-92 regulator candidate; verify Vin, pinout, and 150 C operation.

View details

Alternative comparison matrix

Feature / factor	CJ78L05	CJ78L05C-TAB-ABG	L78L05ABZ-TR	L78L05ACZ	Compatibility / risk
Package	TO-92	TO-92	TO-92	TO-92	TO-92 — same package text; L78L05ABZ-TR: same package text; L78L05ACZ: same package text
Pinout	3-pin TO-92	3-pin TO-92	3-pin	3-pin	3-pin TO-92 — functions not shown; L78L05ABZ-TR: pin functions absent; L78L05ACZ: functions not shown
Voltage	5 V, Vin 30 V	5 V, Vin 30 V	5 V, Vin n/a	5 V, Vin n/a	5 V, Vin 30 V / 5 V, Vin n/a — key ratings match; L78L05ABZ-TR: Vin not in fields; L78L05ACZ: Vin not in fields
Current	100 mA	100 mA	100 mA	100 mA	100 mA — same output current; L78L05ABZ-TR: same output current; L78L05ACZ: same output current
Temperature	0 to 150 C	-40 to 125 C	-40 to 125 C	0 to 125 C	-40 to 125 C — upper limit lower; L78L05ABZ-TR: upper limit lower; L78L05ACZ: upper limit lower

Application & sourcing insights

Questions & answers

Verified drop-in options for CJ78L05 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.