PS9551AL4-E3-AX

Product Overview

Category

The PS9551AL4-E3-AX belongs to the category of optocouplers or optoisolators.

Use

Optocouplers are electronic components used to transfer electrical signals between two isolated circuits. They provide electrical isolation and protect sensitive components from high voltages or noise.

Characteristics

• Optocouplers consist of an LED (light-emitting diode) and a phototransistor or photodiode.
• They can transmit signals across a wide range of frequencies.
• Optocouplers offer high voltage isolation, typically up to several kilovolts.
• They have low power consumption and are compact in size.
• These devices are known for their excellent noise immunity.

Package

The PS9551AL4-E3-AX is available in a small outline package (SOP) with four pins.

Essence

The essence of the PS9551AL4-E3-AX is to provide galvanic isolation between input and output circuits, ensuring signal integrity and protection against voltage spikes or surges.

Packaging/Quantity

The PS9551AL4-E3-AX is typically packaged in reels or tubes, containing a specified quantity of units per package.

Specifications

• Isolation Voltage: 3750 Vrms
• Current Transfer Ratio: 50% to 600%
• Collector-Emitter Voltage: 80 V
• Input Forward Current: 10 mA
• Operating Temperature Range: -40°C to +100°C

Detailed Pin Configuration

The PS9551AL4-E3-AX optocoupler has the following pin configuration:

1. Anode (A1)
2. Cathode (A2)
3. Emitter (E)
4. Collector (C)

Functional Features

• High-speed response time
• Low input current requirement
• High common-mode rejection ratio (CMRR)
• Wide operating temperature range
• RoHS compliant

Advantages and Disadvantages

Advantages

• Provides electrical isolation between circuits
• Protects sensitive components from voltage spikes or noise
• Compact size allows for space-saving designs
• Wide operating temperature range enables use in various environments

Disadvantages

• Limited maximum voltage and current ratings
• Requires careful consideration of input and output compatibility
• Additional circuitry may be needed for specific applications

Working Principles

The PS9551AL4-E3-AX optocoupler operates based on the principle of light-emitting diode (LED) and phototransistor coupling. When an electrical signal is applied to the LED, it emits light. This light is then detected by the phototransistor, which generates a corresponding electrical signal at the output.

Detailed Application Field Plans

The PS9551AL4-E3-AX optocoupler finds applications in various fields, including:

1. Industrial automation: Isolation of control signals in motor drives, power supplies, and PLCs.
2. Telecommunications: Signal transmission and noise isolation in communication systems.
3. Medical equipment: Protection of sensitive electronic components in medical devices.
4. Automotive electronics: Isolation of signals in automotive control systems.
5. Power electronics: Galvanic isolation in inverters, converters, and power supplies.

Detailed and Complete Alternative Models

1. PS9501L1-E3-AX
2. PS9307X1-E3-AX
3. PC817X1NSZ0F
4. TLP521-1GB

These alternative models offer similar functionality and can be considered as substitutes for the PS9551AL4-E3-AX optocoupler.

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