# UMW PC357 Series - SOP4 DC Input Photo Transistor Coupler

## Overview
The UMW PC357 series is a DC input, transistor output optocoupler packaged in a SOP4 plastic package. It utilizes an AlGaAs infrared emitting diode and a silicon planar phototransistor, featuring a robust coplanar double mold structure for stable isolation.

## Features
️· High isolation: 3750 VRMS
️· CTR flexibility (various models available)
️· DC Input
️· Operating Temperature: -55°C to 110°C
️· REACH compliance
️· Halogen-free
️· MSL Class 1
️· UL Recognized: UL1577, File No. E492440

## Absolute Maximum Ratings
️· Forward Current (IF): 60 mA
️· Peak Forward Current (IFP): 1 A
️· Reverse Voltage (VR): 6 V
️· Input Power Dissipation (PI): 100 mW
️· Collector-Emitter Voltage (VCEO): 35 V
️· Emitter-Collector Voltage (VECO): 7 V
️· Collector Current (IC): 50 mA
️· Output Power Dissipation (PO): 150 mW
️· Total Power Dissipation (Ptot): 200 mW
️· Isolation Voltage (Viso): 3750 Vrms
️· Operating Temperature (Topr): -55 to 110 °C
️· Storage Temperature (Tstg): -55 to 125 °C
️· Soldering Temperature (Tsol): 260 °C

## Electrical Characteristics (Ta=25°C)
️· Forward Voltage (VF): 1.24 - 1.4 V @ IF=10mA
️· Reverse Current (IR): ≤ 10 μA @ VR=6V
️· Input Capacitance (Cin): 10 pF @ V=0, f=1kHz
️· Collector Dark Current (ICEO): ≤ 100 nA @ VCE=20V, IF=0
️· Collector-Emitter Breakdown Voltage (BVCEO): ≥ 35 V @ IC=0.1mA, IF=0
️· Emitter-Collector Breakdown Voltage (BVECO): ≥ 7 V @ IE=0.1mA, IF=0
️· Current Transfer Ratio (CTR): 50 - 600 % @ IF=5mA, VCE=5V (Various models: PC357: 50-600%, PC357A: 80-160%, PC357B: 130-260%, PC357C: 200-400%)
️· Collector-Emitter Saturation Voltage (VCE(sat)): 0.06 - 0.2 V @ IF=20mA, IC=1mA
️· Isolation Resistance (RISO): ≥ 10^12 Ω @ DC500V
️· Floating Capacitance (CIO): 0.4 - 1 pF @ V=0, f=1MHz
️· Cut-off Frequency (fc): 80 kHz @ VCE=2V, IC=2mA, RL=100Ω
️· Response Time (Rise) (tr): 3 - 18 μs @ VCE=2V, IC=2mA, RL=100Ω
️· Response Time (Fall) (tf): 4 - 18 μs

## Applications
️· Switch mode power supplies
️· Programmable controllers
️· Household appliances
️· Office equipment

## Reflow Profile
️· Detailed reflow profile parameters are provided, including temperature minimum, maximum, time, ramp-up rate, liquidous temperature, peak temperature, and ramp-down rate for both Sn-Pb and Pb-Free assembly.

## Package Dimensions
️· Dimensions provided in mm.

## Ordering Information
️· Available models: UMW PC357, UMW PC357A, UMW PC357B, UMW PC357C
️· Package type: SOP-4
️· Base quantity: 3000 per reel
️· Delivery mode: Tape and reel.

## Marking
️· "X" : Grading Standard
️· "YWW": Year week number