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4N26
4N25 · General Purpose Phototransistor Optocoupler
4N25/ 4N26/ 4N27/ 4N28Document Number 83725
www.vishay.com
Optocoupler, Phototransistor Output, With Base Connection
Features Isolation Test Voltage 5300 V RMS Interfaces with Common Logic Families Input-output Coupling Capacitance < 0.5 pF Industry Standard Dual-in-line 6-pin Package
Agency Approvals UL File #E52744 System Code H or J DIN EN 60747-5-2(VDE0884)
DIN EN 60747-5-5 pending
Available with Option 1
ApplicationsAC Mains Detection
Reed relay driving
Switch Mode Power Supply Feedback
Telephone Ring Detection
Logic Ground Isolation
Logic Coupling with High Frequency Noise Rejection
DescriptionThe 4N25 family is an Industry Standard Single Chan-
nel Phototransistor Coupler.This family includes the
4N25/ 4N26/ 4N27/ 4N28. Each optocoupler consists
of gallium arsenide infrared LED and a silicon NPN
phototransistor.
These couplers are Underwriters Laboratories (UL)
listed to comply with a 5300 VRMS isolation test volt-
age. This isolation performance is accomplished
through special Vishay manufacturing process.
Compliance to DIN EN 60747-5-2(VDE0884)/ DIN EN
60747-5-5 pending partial discharge isolation specifi-
cation is available by ordering option1.
These isolation processes and the Vishay ISO9001
quality program results in the highest isolation perfor-
mance available for a commercial plastic phototrans-
istor optocoupler.
