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Product Detailed Parameters
- Description：OPTOISO 2.5KV TRANS W/BASE 6-SMD
- Series：4N2X
- Mfr：Lite-On Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of Channels：1
- Voltage - Isolation：2500Vrms
- Current Transfer Ratio (Min)：20% @ 10mA
- Current Transfer Ratio (Max)：-
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：3µs, 3µs
- Input Type：DC
- Output Type：Transistor with Base
- Voltage - Output (Max)：30V
- Current - Output / Channel：100mA
- Voltage - Forward (Vf) (Typ)：1.2V
- Current - DC Forward (If) (Max)：80 mA
- Vce Saturation (Max)：500mV
- Operating Temperature：-55°C ~ 100°C
- Mounting Type：Surface Mount
- Package / Case：6-SMD, Gull Wing
- Supplier Device Package：6-SMD
- Grade：-
- Qualification：-
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Overview
The Lite-On 4N25S-TA1 is a single-channel, general-purpose phototransistor output optocoupler housed in a surface-mount PDIP-6 package. It features an NPN phototransistor output with a maximum collector-emitter voltage of 30V and a peak forward current rating of 80mA. The device provides an isolation voltage of 2500Vrms and maintains a minimum current transfer ratio of 20% at a forward current of 10mA. Typical switching characteristics include a rise time and fall time of 3µs each. It operates within a temperature range of -55°C to 100°C.
Feature Summary
- Provides electrical isolation between input and output circuits via an internal LED and phototransistor structure.
- Designed for general-purpose signal transmission and logic interface applications.
- Complies with multiple international safety certification standards including UL, VDE, and TUV.
Applications
- Logic level shifting and interfacing between different voltage domains.
- Signal isolation in industrial control systems.
- Switching power supply feedback loops.
Procurement Notes
Verify the specific suffix TA1 confirms the tape-and-reel packaging format required for automated assembly processes. Confirm that the 2500Vrms isolation rating meets the safety requirements of the target application environment. Ensure the PDIP-6 surface mount footprint matches the PCB design constraints. Cross-reference the datasheet revision date to ensure compliance with current regulatory standards.
Selection Notes
Select this component when a standard 6-pin surface mount form factor is required for cost-effective isolation. Consider the 3µs switching speed adequate for low-frequency digital signals rather than high-speed data transmission. Evaluate the 20% minimum CTR to ensure sufficient drive capability for the downstream load under worst-case temperature conditions.
Part Context
This part belongs to the industry-standard 4N25/4N26 family of phototransistor optocouplers. The 'S' designation indicates the surface mount variant, while 'TA1' specifies the reel packaging configuration. It serves as a direct pin-compatible alternative to through-hole versions for modern PCB layouts requiring reduced profile and automated placement.
Replacement Considerations
Direct pin-compatible substitutes include the 4N26S-TA1, which offers similar functionality but may differ in current transfer ratio specifications. Verify that any replacement maintains the same 6-pin PDIP-SMD outline and isolation voltage ratings to ensure mechanical and electrical compatibility without redesigning the circuit board.
