What risks should I check before replacing TLP291-4(GB-TP,E)?

Before replacing, verify three key things: 1) The substitute's Current Transfer Ratio (CTR) range is acceptable for your circuit's gain requirements. 2) The physical package and pinout match exactly by checking the datasheet. 3) The substitute's input current requirements are met by your design.

TLP291-4(GB-TP,E) Alternatives, Datasheet & Cross Reference | Toshiba Semiconductor and Storage

Find the best replacements for the Toshiba TLP291-4(GB-TP,E), a 4-channel SO-16 optocoupler. This guide identifies pin-compatible upgrades and functional alternatives for your design.

AI replacement insight

Electrical risklow

Candidates offer superior voltage and temperature ratings. CTR range is wider but should be verified for the specific application.

Package risklow

The TLP293-4 series shares the same SO-16 package and pinout, making it a low-risk physical replacement.

Can it be replaced directly?

Direct replacement for TLP291-4(GB-TP,E) should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The TLP293-4 family from Toshiba, such as TLP293-4(GB-TP,E), serves as an excellent upgrade path, offering higher isolation voltage and a wider operating temperature range in the same package.

Main risk

The primary risk when substituting is a mismatch in the Current Transfer Ratio (CTR). While candidates may have a wider range, the specific gain could affect feedback loop stability or switching times in sensitive applications.

Recommended alternatives

An upgrade path from the same manufacturer with improved isolation voltage, temperature range, and a wider CTR.

View details

Alternative comparison matrix

Feature / factor	TLP291-4(GB-TP,E)	TLP293-4(GB-TP,E	TLP293-4(V4-TP,E	Compatibility / risk
Package	16-SOIC	16-SOIC	16-SOIC	16-SOIC — Package dimensions match.; TLP293-4(V4-TP,E: Package appears to match.
Voltage	2500 Vrms	3750 Vrms	3750 Vrms	3750 Vrms — Higher isolation voltage provides better safety margin.; TLP293-4(V4-TP,E: Higher isolation voltage.
Ctr	50% to 400%	50% to 600%	50% to 600%	50% to 600% — Wider CTR range, covers target's range.; TLP293-4(V4-TP,E: Wider CTR range.
Temperature	-55°C to 110°C	-55°C to 125°C	-	-55°C to 125°C — Wider operating temperature range.
Input Type	DC	DC	-	DC — Input type matches.
Pin Count	16	-	0	0 — Pin count data missing, requires verification.

Application & sourcing insights

Questions & answers

Verified drop-in options for TLP291-4(GB-TP,E) 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.