ISP817-3SM

Transistor, Photovoltaic Output Optoisolators Overview

The Isocom Components ISP817-3SM is a single-channel surface-mount phototransistor optocoupler designed for high-density mounting applications. It features an infrared emitting diode optically coupled to an NPN phototransistor within a compact SMD-4 package. The device provides electrical isolation with a rated voltage of 5300 Vrms, ensuring robust signal transmission across isolated circuits. Key electrical characteristics include a maximum forward voltage of 1.4V and a typical rise time of 4μs alongside a typical fall time of 3μs. It operates reliably within a temperature range of -30°C to 100°C and supports a maximum input current of 50mA.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides high-density surface-mount integration suitable for space-constrained PCB layouts
• Ensures reliable galvanic isolation between input and output circuits via optical coupling
• Features fast switching performance with microsecond-level rise and fall times

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring signal isolation
• Power supply units for feedback loop isolation
• Communication equipment for data line protection

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific CTR binning associated with the suffix '3' against your circuit requirements, as this indicates a particular current transfer ratio range distinct from other variants in the series. Confirm that the SMD-4 footprint matches your board design constraints. Ensure compliance with relevant safety certifications such as UL recognition if required for your end application. Cross-reference datasheet parameters for thermal dissipation limits under actual operating conditions.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a compact surface-mount solution is needed for single-channel isolation with moderate speed requirements. Compare the specified CTR range against load resistor calculations to ensure adequate saturation. Consider the operating temperature range relative to the ambient environment. Evaluate the isolation voltage rating against the system's peak transient voltages to maintain safety margins.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the ISP817 series of high-density mounting phototransistor optically coupled isolators manufactured by Isocom Components. The series offers various lead forms and packaging options to accommodate different assembly needs. These devices are engineered as alternatives to standard commercial optocouplers, providing specialized parameter selection for specific circuit designs while maintaining industry-standard manufacturing quality.

Transistor, Photovoltaic Output Optoisolators FAQ

What does the suffix '3' indicate in the ISP817-3SM part number?

The suffix '3' typically denotes a specific Current Transfer Ratio (CTR) bin or grade, distinguishing it from other variants like the ISP817B which may have different CTR specifications.

Is the ISP817-3SM suitable for AC input signals?

No, the ISP817-3SM is a DC-input device. For AC input applications, models specifically designated for AC input, such as the ISP814XSM, should be selected instead.