PS2505-4

Overview

The PS2505-4 is a four-channel optically coupled isolator from the NEPOC series, manufactured by Isocom Components. It integrates two infrared light-emitting diodes connected in inverse parallel with NPN silicon phototransistors within a space-efficient dual in-line plastic package. The device supports both AC and DC input signals due to its polarity-insensitive configuration. Key electrical specifications include a high isolation voltage of 5300Vrms and a maximum collector-emitter voltage of 80V. The typical switching speed features a rise time of 4μs and a fall time of 3μs. It operates within a temperature range of -30°C to 100°C and undergoes 100% electrical parameter testing.

Feature Summary

• Features a polarity-insensitive input design utilizing inverse parallel infrared LEDs for reliable AC or DC signal transmission
• Provides high electrical isolation capability suitable for systems with different potentials and impedances
• Offers high-speed switching performance with microsecond-level rise and fall times
• All electrical parameters are individually tested to ensure consistent quality and reliability

Applications

• Computer terminals and peripheral interfaces
• Industrial system controllers and automation logic
• Telephone sets and telephone exchange equipment
• Signal transmission between circuits of differing potentials

Procurement Notes

Verify the specific ordering suffix when purchasing, as options such as G for 10mm lead spread, SM for surface mount, or SMT&R for tape and reel packaging alter the physical form factor. Confirm that the required isolation voltage and channel count match the application requirements. Ensure compatibility with the target PCB footprint if selecting the standard DIP variant. Check for any custom electrical selection requests if standard CTR ranges are insufficient.

Selection Notes

Select this component when high-density integration of four isolated channels is required in a compact DIP package. It is appropriate for applications demanding immunity to input polarity variations, making it suitable for AC line monitoring or bidirectional data links. Consider the 5300Vrms isolation rating for safety-critical interfaces. Evaluate the 80V collector-emitter voltage against load requirements. This device serves as a direct replacement for legacy NEC or California Eastern Labs equivalents in existing designs.

Part Context

The PS2505-4 belongs to the NEPOC (High Isolation Voltage AC Input Response Type Multi Photocoupler) series. This family is characterized by its ability to handle AC inputs directly without external rectification. The series includes single, dual, and quad channel variants, with the PS2505-4 representing the four-channel option. It is widely recognized as a standard industry type for general-purpose isolation tasks requiring robust performance and compact sizing.

Replacement Considerations

Public confirmed substitute part numbers include PS2505-4-A and PS2505L-4-E3-A. Verify pinout compatibility and package dimensions before substitution. Ensure the alternative device meets the same 5300Vrms isolation requirement and supports the necessary AC input functionality.