Is there a pin-compatible replacement for LTV-356T-B?

While LTV-356T-D has a compatible pinout and package, its different CTR (300-600% vs. target's 100-200%) means it is not a direct drop-in replacement. Engineering review is required to adjust the circuit for the higher gain.

What risks should I check before replacing LTV-356T-B?

The main risk is the different Current Transfer Ratio (CTR). Using a higher CTR part like LTV-356T-D without adjusting the input current may cause the output transistor to saturate incorrectly, affecting switching times or logic levels.

LTV-356T-B Alternatives, Datasheet & Cross Reference | LITEON

Find functional alternatives for the LITEON LTV-356T-B optocoupler. This page analyzes substitutes like the LTV-356T-D, highlighting key parametric differences such as Current Transfer Ratio (CTR) to ensure proper system integration.

AI replacement insight

Electrical riskmedium

Different CTR requires recalculation of the input current limiting resistor.

Package risklow

Package and pinout are identical for same-series alternatives.

Can it be replaced directly?

No direct drop-in replacement was found. The closest options are other CTR bins from the LTV-356T series, which require circuit modification.

Best replacement path

Use LTV-356T-D, a part from the same series with a higher CTR bin, after circuit review.

Main risk

The primary risk is the mismatched Current Transfer Ratio (CTR), which can alter the circuit's switching behavior.

Recommended alternatives

Functional alternative from the same series with identical package and voltage ratings, but a higher CTR bin.

View details

Alternative comparison matrix

Feature / factor	LTV-356T-B	LTV-356T-D	LTV-356T-TP-D-G	Compatibility / risk
Package	Mini-flat	Mini-flat	Mini-flat	Mini-flat — Package matches, enabling form-fit compatibility.; LTV-356T-TP-D-G: Package matches, enabling form-fit compatibility.
Voltage	3750 Vrms	3750 Vrms	80 V	3750 Vrms / 80 V — Isolation voltage matches.; LTV-356T-TP-D-G: Collector-Emitter Voltage (VCEO) matches.
Current Transfer Ratio	100-200% (inferred B-rank)	300-600%	300-600%	300-600% — Candidate is D-rank CTR, higher than target's inferred B-rank (100-200%). Circuit review required.; LTV-356T-TP-D-G: Candidate is D-rank CTR, higher than target's inferred B-rank (100-200%). Circuit review required.
Temperature	-55°C to +110°C	-55°C to +110°C	-55°C to +110°C	-55°C to +110°C — Operating temperature range matches.; LTV-356T-TP-D-G: Operating temperature range matches.

Application & sourcing insights

Questions & answers

LTV-356T-D is a strong functional alternative from the same LITEON series. It shares the same package and voltage ratings but has a higher Current Transfer Ratio (CTR) which requires circuit review.