Is there a pin-compatible replacement for LTV-217-B-G?

No pin-compatible replacement with fully identical specifications was identified. LTV-356T-C shares the same manufacturer and package but has a different CTR bin. VOMA617A-8X001T is also in a SOP-4 package but has a different temperature range. Footprint and electrical parameters must be verified.

What risks should I check before replacing LTV-217-B-G?

Before replacing, you must verify three key things: 1) The package footprint is identical. 2) The candidate's Current Transfer Ratio (CTR) range is acceptable for your circuit's gain. 3) The operating temperature range meets your system's requirements.

LTV-217-B-G Alternatives, Datasheet & Cross Reference | LITEON

LTV-217-B-G is a single-channel phototransistor optocoupler in a compact half-pitch 4-SOP package. When finding a substitute, it is critical to match the 130-260% Current Transfer Ratio, 70V collector voltage, and physical footprint.

AI replacement insight

Electrical riskmedium

Many alternatives have different or wider CTR bins, which can alter circuit behavior.

Package riskmedium

Some candidates use standard SOIC-4 packages, which are larger than the target's half-pitch SOP-4.

Sourcing risklow

Multiple manufacturers produce similar optocouplers, providing several sourcing options.

Can it be replaced directly?

No direct, drop-in replacement with identical parameters was found. VOMA617A-8X001T is very close but has a narrower temperature range. All candidates require engineering review.

Best replacement path

VOMA617A-8X001T offers a close electrical match if the application's minimum temperature is above -40°C. For a package-compatible option, LTV-356T-C is viable if the circuit tolerates higher gain.

Main risk

The primary risks are mismatches in Current Transfer Ratio (CTR) affecting circuit gain, and physical package differences requiring board layout changes.

Recommended alternatives

A functional alternative with matching CTR and higher VCEO, but a more limited minimum operating temperature.

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Alternative comparison matrix

Feature / factor	LTV-217-B-G	VOMA617A-8X001T	LTV-356T-C	VOS617A-8T	Compatibility / risk
Package	4-SOP	4-SOP	4-SOP	4-SOIC (4.40mm Width)	4-SOP / 4-SOIC (4.40mm Width) — Package appears to be a compatible SOP-4, but requires footprint verification.; LTV-356T-C: Package matches target.; VOS617A-8T: Candidate has a larger standard SOIC-4 package, not a half-pitch SOP-4.
Voltage	3.75 kVrms	3750 VRMS	80 V	80 V	3750 VRMS / 80 V — Isolation voltage matches.; LTV-356T-C: Collector-Emitter Voltage (VCEO) is higher.; VOS617A-8T: VCEO is higher, providing more margin.
Ctr	130% - 260%	130% - 260%	200% - 400%	130% - 260%	130% - 260% / 200% - 400% — Current Transfer Ratio range matches target's 'B' grade.; LTV-356T-C: Candidate is a higher gain 'C' grade vs target's 'B' grade.; VOS617A-8T: Current Transfer Ratio range matches target's 'B' grade.
Temperature	-55°C to +110°C	-40°C to +110°C	-55°C to +110°C	-55°C to +110°C	-40°C to +110°C / -55°C to +110°C — Minimum operating temperature is higher than target.; LTV-356T-C: Operating temperature range matches.; VOS617A-8T: Operating temperature range matches.

Application & sourcing insights

Questions & answers

The best alternatives require review. VOMA617A-8X001T is electrically very similar but has a narrower temperature range. VOS617A-8T is electrically strong but has a larger package. LTV-356T-C has the right package but a higher CTR.