Part: EL357N-G Series — Everlight

Type: Phototransistor Photocoupler

Description: A 4-pin small outline SMD phototransistor photocoupler featuring an infrared emitting diode optically coupled to a phototransistor, offering a current transfer ratio of 50-600% at IF=5mA, VCE=5V, and a high isolation voltage of 3750 V rms.

Operating Conditions:

• Operating temperature: -55 to +110 °C
• Current Transfer Ratio (CTR): 50–600% (at IF = 5mA, VCE = 5V)
• Isolation voltage: 3750 V rms

Absolute Maximum Ratings:

• Max forward current: 50 mA
• Max collector current: 50 mA
• Max collector-emitter voltage: 80 V
• Max reverse voltage: 6 V
• Max total power dissipation: 200 mW
• Max storage temperature: +125 °C

Key Specs:

• Forward voltage (VF): 1.4 V (max, at IF = 20mA)
• Reverse current (IR): 10 μA (max, at VR = 4V)
• Collector-Emitter dark current (ICEO): 100 nA (max, at VCE = 20V, IF = 0mA)
• Collector-Emitter breakdown voltage (BVCEO): 80 V (min, at IC = 0.1mA)
• Collector-Emitter saturation voltage (VCE(sat)): 0.2 V (max, at IF = 20mA, IC = 1mA)
• Isolation resistance (RIO): 5×10^10 Ω (min, at VIO = 500Vdc, 40-60% R.H.)
• Rise time (tr): 18 μs (max, at VCE = 2V, IC = 2mA, RL = 100Ω)
• Fall time (tf): 18 μs (max, at VCE = 2V, IC = 2mA, RL = 100Ω)

Features:

• Halogens free (Br <900 ppm, Cl <900 ppm, Br+Cl < 1500 ppm)
• Current transfer ratio (CTR: 50~600% at IF =5mA, VCE =5V)
• High isolation voltage between input and output (Viso=3750 V rms)
• Compact 4 Pin SOP with a 2.0 mm profile
• Compliance with EU REACH
• Pb free and RoHS compliant
• UL and cUL approved (No. E214129)
• VDE approved (No. 132249)

Applications:

• DC-DC Converters
• Programmable controllers
• Telecommunication equipments
• Signal transmission between circuits of different potentials and impedances

Package:

• 4 Pin SOP

• Halogens free (Br <900 ppm ,Cl <900 ppm , Br+Cl < 1500 ppm)
• Current transfer ratio

(CTR: 50~600% at IF =5mA, VCE =5V)

• High isolation voltage between input and output (Viso=3750 V rms )
• Compact 4 Pin SOP with a 2.0 mm profile
• Compliance with EU REACH
• Pb free and RoHS compliant
• UL and cUL approved (No. E214129)
• VDE approved (No. 132249)
• SEMKO approved
• NEMKO approved
• DEMKO approved
• FIMKO approved

• DC-DC Converters
• Programmable controllers
• Telecommunication equipments
• Signal transmission between circuits of different potentials and impedances

EL357N-G Pinout

Package: 4-Pin SOP

Notes

• EL357N-G is an optoisolator (optocoupler) with an integrated LED and phototransistor.
• Pins 1–2 form the input (LED) side; pins 3–4 form the output (transistor) side.
• Pin numbering is derived directly from the "Pin Configuration" list in the datasheet; no pin diagram image was provided to verify against.