PS2521L-1-A

Overview

The PS2521L-1-A is a single-channel transistor-output optocoupler manufactured by CEL. It features an NPN phototransistor output and operates with a forward current of 150 mA and a forward voltage of 1.7 V. The device provides high isolation with a rated insulation voltage of 5000 Vrms. Key electrical parameters include a maximum collector-emitter voltage of 80 V, a maximum collector current of 50 mA, and a collector-emitter saturation voltage of 300 mV. Timing characteristics specify a rise time of 3 µs and a fall time of 5 µs. The unit has a power dissipation rating of 150 mW and a current transfer ratio of 80%. It is housed in a 4-SMD package and supports operating temperatures from -55°C to +100°C.

Feature Summary

• Provides electrical isolation between input and output circuits using a single channel design.
• Features an NPN phototransistor output for signal transmission.
• Designed for high isolation voltage applications.

Applications

• General purpose signal isolation
• DC circuit coupling
• High input impedance interfacing

Procurement Notes

Verify the specific suffix against official datasheets, as variations like L-1-F3-A or E3-A may exist. Confirm package type (SMD vs DIP) and lead availability, as some variants are discontinued. Ensure RoHS compliance status matches project requirements. Cross-reference manufacturer part numbers with distributor listings to avoid counterfeit components.

Selection Notes

Select this component when high isolation voltage is required for single-channel DC applications. Consider the 5000 Vrms rating for safety-critical interfaces. Evaluate the 3 µs rise time for speed requirements. Compare thermal performance within the specified temperature range against alternative SMD optocouplers if space constraints exist.

Part Context

This component belongs to the PS2521 series of transistor-output optocouplers from CEL. The series includes various packages such as DIP and SMD configurations. Variants like PS2521-1-A offer through-hole mounting, while the L-series denotes surface mount devices. The family focuses on general-purpose isolation with consistent electrical characteristics across different physical form factors.

Replacement Considerations

Public confirmed substitutes include PS2521L-1-F3-A and PS2521L-1-E3-A from CEL. These variants share similar electrical specifications but may differ in packaging suffixes or compliance markings. Verify pinout compatibility before substitution.