PEPPERL+FUCHS Z728 71788

<h2>Pepperl+Fuchs Z728 Zener Safety Barrier</h2> <h3>Description</h3> <p>The Pepperl+Fuchs Z728 is a single-channel, passive Zener barrier from the Z-Series, designed for intrinsic safety applications. It limits the energy (voltage and current) transferred from a safe area to a hazardous area, ensuring that field devices like transmitters and sensors cannot become an ignition source. This module is ideal for maintaining the safety integrity of control systems in environments with explosive atmospheres.</p> <h3>Specifications</h3> <ul> <li>Manufacturer: Pepperl+Fuchs</li> <li>Type: Z728</li> <li>Part Number: 71788</li> <li>Series: Z-Series</li> <li>Channels: 1</li> <li>Function: Zener Safety Barrier</li> <li>Supply Voltage (Um): max. 250V</li> <li>Output Voltage (Uo): 28.0V</li> <li>Output Current (Io): 93mA</li> <li>Ambient Temperature: -20 to +60 deg C</li> <li>Mounting: DIN Rail</li> </ul> <h3>Label Info</h3> <ul> <li>Part No: 71788</li> <li>Type/Typ: Z728</li> <li>ATEX Certificate: BAS01ATEX7005</li> <li>TUV Certificate: TUV99ATEX1484X</li> <li>Ex marking: II (1) G D, [EEx ia] IIC</li> </ul> <h3>Application</h3> <p>This barrier is suitable for use in process automation and control systems within industries such as chemical, oil & gas, pharmaceutical, and mining, where intrinsically safe circuits are required for connecting field devices in hazardous locations.</p> <h3>Country of Origin</h3> <p>Made in Indonesia.</p> <h3>CO2 Impact</h3> <p>Reusing this safety barrier saves approximately 5.0 kg of CO2 compared to manufacturing a new one. This saving is equivalent to the emissions from driving a car for 25 km.</p> <h3>Availability</h3> <p>This is an obsolete item, available as New Old Stock (NOS). Order now from spareparts2day for expert support and fast delivery.</p> <h3>FAQ</h3> <strong>What is the primary function of the Z728 Zener barrier?</strong><br><p>The Z728’s main function is to provide intrinsic safety. It is a passive device that uses Zener diodes to limit voltage and resistors to limit current to a level that is incapable of causing an explosion in a specified hazardous atmosphere.</p> <strong>Is the Pepperl+Fuchs Z728 an active or passive component?</strong><br><p>The Z728 is a passive component. It does not require an external power supply for its own operation and derives its functionality from the energy within the circuit it protects.</p> <strong>Can this Z728 barrier be used with any type of hazardous area sensor?</strong><br><p>No, it must be matched to the sensor or field device. The barrier’s safety parameters (Uo, Io, Po) must be greater than or equal to the device’s entity parameters (Ui, Ii, Pi). Additionally, the cable’s capacitance and inductance must be considered. Always refer to the system’s intrinsic safety documentation.</p> <p><em>spareparts2day is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners.</em></p> <p>Last Update: Friday, March 13, 2026</p>