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Carlo Gavazzi RZ3A40D55 - SSR 3 POLE ZS 24-440V 55A 4-32VDC
Carlo Gavazzi

RZ3A40D55


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Overview

The Carlo Gavazzi RZ3A40D55 is a 3-pole solid-state relay (SSR) designed for panel mounting in industrial automation systems. This high-current SSR switches 24-440 Vac (800 Vp) loads at 55 Aac with zero-cross switching to minimize electrical noise and extend equipment life. The control voltage range is 4-32 Vdc, making it compatible with PLCs, microcontrollers, and other low-voltage control systems. Built for reliability in demanding environments, the RZ3A40D55 features built-in overvoltage protection and is optimized for resistive and inductive loads. Its compact panel-mount design integrates seamlessly into control panels, junction boxes, or electrical enclosures. Typical applications include motor switching, heating control in plastics processing, packaging machinery, food processing equipment, and solder reflow systems. Part of Carlo Gavazzi’s RZ3 series, this SSR leverages direct copper bonding technology for superior thermal performance and longevity. The zero-cross switching ensures smooth load transitions, reducing inrush currents and electrical interference. With a robust construction and proven performance in industrial settings, the RZ3A40D55 delivers precise, maintenance-free switching for critical automation tasks.
  • 3-pole panel-mount solid-state relay (SSR)
  • Switches 24-440 Vac (800 Vp) at 55 Aac with zero-cross switching
  • Control voltage: 4-32 Vdc for PLC and low-voltage compatibility
  • Built-in overvoltage protection for stable operation in industrial environments
  • Designed for motor switching, heating control, and automation applications
  • Built-in overvoltage protection

Specifications

Current Rating
55 Aac
Mounting Type
Panel Mount
Poles
3
Series
RZ3
Voltage Rating
24-440 Vac
Package Dimensions (L x W x H)
3.1 in x 4.3 in x 1.8 in
Package Weight (Imperial)
0.80 lb
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Frequently Asked Questions about Carlo Gavazzi

What industries and applications are Carlo Gavazzi products used for?

Carlo Gavazzi products are used across a wide range of strategic industries, including Food and Beverage, Semiconductors, EV Charging Stations, Energy Storage, Manufacturing, Agriculture, HVAC, Data Centers, Mining, Elevators, Conveyors, and Mobile Equipment. Their product lines specifically support industrial automation, energy monitoring, control systems, and sensing applications in these sectors, with specialized solutions for power analysis, current measurement, data logging, and industrial control components.

What technical support does Carlo Gavazzi offer?

Carlo Gavazzi offers comprehensive technical support through multiple channels. With 22 wholly-owned sales companies and distributors in 60 countries, customers can access local technical assistance via phone, email, and online resources. Their support includes product documentation, downloadable data sheets, web resources at GavazziOnline.com and GavazziAutomation.com, and direct contact through regional sales offices in the USA, Canada, Mexico, and Brazil.

What are the main product lines offered by Carlo Gavazzi?

Carlo Gavazzi offers a comprehensive range of industrial automation product lines, including power supplies, sensors, solid state relays, energy meters, monitoring relays, motor controllers, and control components. Their key product ranges span sensors, switches, and controls, with specific lines like 1-phase and 3-phase power supplies, photoelectric and inductive sensors, IO-Link sensors, energy analyzers, and industrial relays designed for strategic industries including food and beverage, EV charging, manufacturing, and building automation.

What are the key features of Carlo Gavazzi products?

Carlo Gavazzi products feature advanced industrial automation technologies across multiple product lines, including energy meters, power analyzers, sensors, and IoT solutions. Key features include integrated communication protocols like Modbus TCP/IP, Microsoft Azure and AWS compatibility, IO-Link sensor capabilities, and robust design for industrial environments. Their products offer high-performance monitoring, data logging, and control functions with emphasis on energy efficiency, remote connectivity, and flexible integration across industrial and building automation applications.

What communication protocols do Carlo Gavazzi products support?

Carlo Gavazzi products support multiple industrial communication protocols including Modbus TCP/IP, Modbus RTU, PROFINET, EtherNet/IP, HTTP, FTP, and OPC UA. Their energy management platforms like UWP4.0 and VMU-C EM are designed with flexible communication capabilities, enabling integration with IoT platforms such as Microsoft Azure and Amazon AWS, and supporting both local and remote monitoring across various industrial automation systems.

What accessories are available for Carlo Gavazzi products?

Carlo Gavazzi offers a comprehensive range of accessories for their sensors and automation components. These include PVC and PUR cordsets in various lengths and configurations, universal mounting brackets for cylindrical sensors (Ø4 to Ø30 mm), galvanized and stainless steel mounting brackets, and a wide selection of reflectors for photoelectric sensors. Specific accessories include IP67 and IP68 cordsets with straight or right-angle M12 connectors, terminals for hardwiring, and specialized reflectors like the heated ER681 for cold installations.

How are Carlo Gavazzi products typically installed?

Carlo Gavazzi products are typically installed using flexible mounting options including DIN-rail, around busbars, directly onto back panels, and with various current transformer configurations. Energy meters, power analyzers, and monitoring devices can be mounted with split-core or solid-core current transformers, supporting installation ranges from 600A to 3200A primary current. Many products feature modular designs with optional communication modules like Modbus-RTU, BACnet-IP, and built-in web servers to facilitate easy integration into industrial and building automation systems.

What certifications and standards do Carlo Gavazzi products comply with?

Carlo Gavazzi products meet rigorous international certification standards, including UL (United States), cULus (Canada), CE (European Community), UKCA (United Kingdom), EAC (Russia), and C-Tick (Australia & New Zealand). Our products comply with critical mechanical and functional safety standards such as EN 60529 (IP protection), EN 61800-5-2, ISO 13849-1, and IEC 61508, ensuring high reliability and performance across industrial automation applications.

What is Carlo Gavazzi's warranty policy?

Carlo Gavazzi provides a standard 18-month warranty from the invoicing date for its automation products, covering defects in workmanship and materials. The warranty requires proper transportation, handling, storage, and installation within specified environmental conditions. Warranty coverage is contingent on correct operation within designed capacity limits, scheduled preventive maintenance, and repairs performed only by authorized WEG service technicians.