Previous Image Next Image 4N25 CTR vs I LED at 25C Figure X. Current transfer ration (CTR) as a function of LED current. Note datasheet has CTR curves for other temperatures also. Please link to us if you find the information helpful ...<br>TwitterFacebookPinterestDiggLinkedinRedditStumbleUponTumblr Please link to us if you find the information helpful ...<br>TwitterFacebookPinterestDiggLinkedinRedditStumbleUponTumblr