Active production — what it means for the BOM line
The TCLT1014: RoHS3 compliant and rated for -55°C to +110°C operating temperature, so it fits industrial and automotive-adjacent environments where the board sees sustained heat but not the full under-hood profile.
Isolation and CTR — the two numbers that decide the fit
5000 Vrms isolation is the reinforced single-channel rating for a 4-SOP package — it meets the basic insulation requirement for mains-connected circuits in IEC 60950-1 and IEC 62368-1, so the TCLT1014 can sit on the secondary side of a flyback converter and report back to the primary controller without a separate isolation barrier. Current transfer ratio spans 160% minimum to 320% maximum at If=10 mA. Output transistor handles up to 70 V Vce and 50 mA continuous per channel. The 300 mV Vce(sat) at rated current keeps the voltage drop low enough that the output can drive a 5 V logic input or a small relay coil without an additional buffer transistor.
Switching speed and package — line-feed considerations
Rise and fall times are 3 µs and 4.7 µs typical; turn-on and turn-off times are 6 µs and 5 µs typical. This is a DC-coupled optocoupler for status feedback, fault signalling, and low-speed data — not for high-speed digital isolation above about 100 kbps. For a PLC digital input or a relay driver, the 3 µs edge is fast enough to avoid missing a pulse from a 1 kHz sensor. 4-SMD gull wing package with a 4-SOP supplier device package. The gull wing leads are pick-and-place friendly and self-align during reflow.