PS2505-4G

Overview

The PS2505-4G is a high-density, four-channel optically coupled isolator manufactured by Isocom Components. It features dual infrared light-emitting diodes connected in inverse parallel for AC or polarity-insensitive input, paired with NPN silicon phototransistors. The device provides a high isolation voltage of 5300Vrms and 7.5kV peak. Key electrical parameters include a maximum forward voltage of 1.4V, a typical rise time of 4μs, and a typical fall time of 3μs. It operates within a temperature range of -30°C to 100°C and supports a maximum input current of 50mA.

Feature Summary

• Four-channel configuration with inverse parallel LED inputs for AC compatibility
• High isolation voltage rating of 5300Vrms for robust signal transmission
• NPN silicon phototransistor outputs ensuring reliable switching performance
• Surface mount package option available for space-efficient design

Applications

• Computer terminals and peripheral interfaces
• Industrial system controllers and automation logic
• Telephone sets and exchange equipment signaling
• Signal transmission between systems with different potentials

Procurement Notes

Verify the specific suffix 'G' against official Isocom documentation to confirm lead spread variations or RoHS compliance status. Ensure the selected package type matches the required PCB footprint, as surface mount variants exist. Confirm that the AC input capability aligns with the target circuit design requirements before finalizing procurement orders.

Selection Notes

Select this component when multi-channel isolation is required for AC-coupled signals. The inverse parallel LED arrangement simplifies driver circuitry compared to single-channel DC devices. Consider the 5300Vrms isolation rating for applications demanding strict galvanic separation between high-voltage and low-voltage domains.

Part Context

The PS2505 series belongs to Isocom's high-density optocoupler family, designed as a replacement for legacy NEC components. The 'G' suffix typically denotes a specific mechanical variation, such as lead spread, rather than a change in electrical function. This series complements other Isocom offerings like the PS2501 and PS2502 lines.

Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided source material. Designers should consult official cross-reference guides for equivalent high-isolation AC-input quad optocouplers.