The H11A4TVM: Sourced through independent distribution channels — quantities are lot-specific and confirmed at RFQ. No official successor or pin-compatible replacement is recorded from onsemi.
7500Vpk isolation — what it means for the barrier
Rated at 7500Vpk isolation voltage, this optoisolator provides reinforced-level galvanic isolation between input and output circuits for peak transient events, tested per the device's hi-pot screening. The 6-DIP (0.400", 10.16mm) through-hole package with 7.62mm pin pitch supports standard creepage distances for basic isolation at mains voltages when proper PCB slotting is used.
10% CTR — drive current planning
Minimum current transfer ratio of 10% at 10mA forward current means the output transistor conducts at least 1mA collector current when the LED is driven at 10mA — this sets the minimum load resistor value for logic-level interfaces. The typical forward voltage of 1.18V at 10mA forward current and 60mA absolute maximum DC forward current define the LED drive budget across temperature, with the 400mV Vce saturation maximum ensuring low-side voltage drop into a digital input.
2µs switching — fit for low-frequency isolation
Typical turn-on and turn-off times of 2µs each give a practical data rate ceiling around 250 kbps — suitable for 50/60 Hz zero-crossing detection, relay driver feedback, and isolated status monitoring where sub-microsecond edge rates are not required. The 30V maximum output voltage and single-channel transistor-with-base output allow direct interface to 5V and 12V logic families, with the base terminal available for external speed-up or noise filtering.
DC input type accepts logic-level or switched DC drive from 3.3V to 24V rails with appropriate series resistor — the 60mA absolute maximum forward current limits the minimum resistor value at higher supply voltages.