Typically ranges from 20% to 100% or higher, depending on the specific manufacturing bin and test current ( Collector-Emitter Saturation Voltage [
R1=VCC1−VFIFcap R sub 1 equals the fraction with numerator cap V sub cap C cap C 1 end-sub minus cap V sub cap F and denominator cap I sub cap F end-fraction (typical diode forward drop), and target
VCE(sat)cap V sub cap C cap E open paren s a t close paren end-sub ): Maximum 0.4 V ( Switching Performance 3.0 µs to 5.0 µs ( Turn-Off Time ( tofft sub o f f end-sub ): 3.0 µs to 5.0 µs ( Understanding the Current Transfer Ratio (CTR) 1458 optocoupler datasheet
(often referred to simply as the 1458 optocoupler) is a high-performance, hermetically sealed high-speed optocoupler
Operating the component beyond these limits can cause permanent damage to the device. These specifications are typically rated at an ambient temperature ( TAcap T sub cap A ) of 25°C unless specified otherwise. -55°C to +125°C Operating Temperature Range: -40°C to +85°C Isolation Voltage ( VISOcap V sub cap I cap S cap O end-sub ): 3750 VRMScap V sub cap R cap M cap S end-sub VRMScap V sub cap R cap M cap S end-sub (1-minute rating, depending on suffix/manufacturer) Input Diode (Per Channel) Forward Current ( IFcap I sub cap F ): 25 mA Peak Forward Current ( IF,peakcap I sub cap F comma p e a k end-sub ): 50 mA (with brief pulse width) Reverse Voltage ( VRcap V sub cap R ): 5 V Output Detector (Per Channel) Output Current ( IOcap I sub cap O ): 8 mA Supply Voltage ( VCCcap V sub cap C cap C end-sub Typically ranges from 20% to 100% or higher,
Features a Silicon NPN Phototransistor. When the infrared light strikes the base-collector junction of this phototransistor, it generates a current, allowing electrical conduction across the output terminals.
If your "1458 optocoupler" has a VCEO lower than 30V, it is not suitable for motor drives. If it is higher (e.g., 70V), it is likely a high-voltage variant like the 4N36. When the infrared light strikes the base-collector junction
Before diving into specs, we need to address the elephant in the room.