6N136 – High Speed Optocoupler

The 6N136 is a high-speed optocoupler featuring a GaAlAs LED input optically coupled to a totem-pole output photodetector, ideal for galvanic isolation in PLC I/O interfaces or motor drive gate signals.​

Key Specifications

It supports 1 MBd data rates, 25 mA forward current (IF), 8-16 mA output current (IO), 5300 Vrms isolation, and TTL/CMOS compatibility over -40°C to +100°C, with low VOL (0.1V typical) and 10-2000% CTR. Pinout: 1=NC, 2=Anode, 3=Cathode, 4=NC, 5=NC, 6=Output, 7=Vo (up to 15V), 8=GND/Vee.​

Applications in Your Setup

In Rockwell PLC systems or motor test benches, use 6N136 for isolating WT333E analog signals to GuardLogix inputs, preventing noise in no-load/blocked rotor tests, or buffering LEM conditioner outputs for SIL3-rated safety interlocks with 5mA LED drive from 3.3/5V rails. Pair with pull-up resistor (e.g., 10kΩ to 5V) on output for open-collector fallback if needed