This part is a kind of semiconductor called 3B43.

Function of this product has (3B42 - 3B44) Isolated AC Sine Wave Input.

Manufacturers : Analog Devices

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Isolated AC Sine Wave Input 3B42 / 3B43 / 3B44 FEATURES AC averaging technique used to rectify, amplify, and filter 50 Hz to 400 Hz sine-wave signals. Accepts inputs of between 20 mV to 550 V rms to give an rms output reading. Module provides simultaneous precision voltage and current outputs. Module circuitry can withstand 130v rms at the input screwterminals. All 3B42, 3B43, & 3B44 series modules are mix-and-match and Hot Swappable. FUNCTIONAL BLOCK DIAGRAM Figure 1. 3B42, 3B43, & 3B44 Functional Block Diagram APPLICATIONS Industrial signal conditioning Industrial signal isolation Industrial signal filtering Output modules accept 0 to +10V (or +10V) single-ended signals and provide an isolated 4-20 mA (or 0-20 mA) process signal. All modules feature a universal p [ ... ]

3B43 PDF Datasheet Download