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Citel 480 Volt 50kA Surge Protection Device
The CITEL M50-A Series surge protective device is an excellent choice for industrial control systems and electrical panels, offering robust 50kA surge current protection with hybrid MOV-GSG technology. Its UL1449 Type 1 listing ensures reliability for both indoor and outdoor installations, while the fail-safe design and real-time diagnostics enhance operational safety. Ideal for service entrance and distribution panels, this SPD's side mount with threaded M22 adapter simplifies installation, making it suitable for demanding environments like manufacturing facilities and warehouses.
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Product Specifications
Key Features
| Brand | Citel |
| SPD Type | UL1449 TYPE 1 LISTED |
| Volts | 480 |
| Phase | 3D |
| Modes | L-L, L-G |
| Voltage Protection Rating | 2500/1500 |
| Maximum Continuous Operating Voltage | 560/560 |
| IN | 20 kA |
| SCCR | 150 kA |
| IMAX | 50 kA |
| Technology | MOV-GSG |
| Network Configuration | 3PH, 3W+G, Delta |
| Connection Method | 36 in #12 AWG LEADS |
| Mounting | Threaded 1/2 in NPT |
| Fail Safe | Yes, no upstream over current protection required |
| Real-Time Diagnostics | LED and audible alarm |
Product Description
Key Features
- Brand: Citel
- SPD Type: UL1449 TYPE 1 LISTED
- Volts: 480
- Phase: 3D
- Modes: L-L, L-G
- Voltage Protection Rating: 2500/1500
- Maximum Continuous Operating Voltage: 560/560
- IN: 20 kA
- SCCR: 150 kA
- IMAX: 50 kA
- Technology: MOV-GSG
- Network Configuration: 3PH, 3W+G, Delta
- Connection Method: 36 in #12 AWG LEADS
- Mounting: Threaded 1/2 in NPT
- Fail Safe: Yes, no upstream over current protection required
- Real-Time Diagnostics: LED and audible alarm
The CITEL M50-A Series is a panel-mounted surge protective device (SPD) designed for service entrance, branch, and distribution panel applications, featuring hybrid MOV-GSG technology, 50kA surge current protection per mode, LED status indication, and an audible alarm.
It provides L-L, and L-G protection with no leakage current, is suitable for indoor or outdoor installation, and is UL 1449 Type 1 Listed.
Web ID: 2756
Product Overview
The CITEL M50-A Series is a surge protective device (SPD) designed for integration into electrical panels and industrial control systems. It offers robust protection against electrical surges with its hybrid MOV-GSG technology, providing a maximum surge current of 50kA per mode. This device is suitable for both indoor and outdoor installations, making it versatile for various environments. The SPD is UL 1449 Type 1 Listed, ensuring compliance with industry standards for safety and performance.
This surge protector is engineered for service entrance, branch, and distribution panel applications. It features LED status indication and an audible alarm for real-time diagnostics, enhancing its reliability in critical applications. The CITEL M50-A Series is designed for easy installation with a threaded M22 adapter, and it operates without requiring upstream overcurrent protection.
Core Performance and Output
The CITEL M50-A Series delivers a high level of surge protection with a maximum surge current of 50kA per mode. It operates at 480 volts and is configured for three-phase, three-wire plus ground (3PH, 3W+G) Delta networks. The device's voltage protection rating is 2500/1500, and it supports a maximum continuous operating voltage of 560 volts. With a short-circuit current rating (SCCR) of 150 kA, it is built to handle significant electrical disturbances.
The SPD's hybrid MOV-GSG technology ensures efficient energy dissipation, providing reliable protection for sensitive equipment. The device's performance is optimized for environments where electrical surges are common, such as industrial facilities and commercial buildings. It is important to note that while the device offers robust protection, excessive surge events may require additional protective measures.
Adjustability and Control Options
The CITEL M50-A Series features real-time diagnostics through LED status indicators and an audible alarm, allowing for immediate awareness of the device's operational status. This feature aids in quick identification of any issues, ensuring that maintenance personnel can address potential problems promptly. The device's fail-safe design ensures continued protection even in the event of a component failure.
While the SPD does not offer adjustable settings, its straightforward design and reliable diagnostics make it a dependable choice for surge protection in various applications. The lack of need for upstream overcurrent protection simplifies installation and reduces the complexity of system integration.
Longevity and Reliability
Designed with durability in mind, the CITEL M50-A Series is built to withstand harsh electrical environments. Its robust construction and high surge current capacity contribute to its long service life, making it a reliable choice for protecting critical electrical systems. The device's fail-safe behavior ensures that it continues to provide protection even if a component fails, enhancing its reliability.
The SPD's hybrid MOV-GSG technology is engineered for longevity, providing consistent performance over time. Regular monitoring of the LED status indicators and audible alarm can help ensure that the device remains in optimal working condition, reducing the risk of unexpected failures.
Build Quality and Physical Characteristics
The CITEL M50-A Series is constructed with high-quality materials to ensure durability and reliability. Its compact design allows for easy integration into existing electrical panels, and the threaded 1/2 inch NPT mounting facilitates secure installation. The device's 36-inch #12 AWG leads provide flexibility in connecting to various panel configurations.
The SPD's robust build quality is complemented by its ability to operate in both indoor and outdoor environments, making it suitable for a wide range of applications. Its fail-safe design and real-time diagnostics further enhance its reliability, providing peace of mind for facility operators and maintenance personnel.
Where This Product Fits Best
The CITEL M50-A Series is ideal for environments where electrical surge protection is critical. Its design and performance characteristics make it suitable for integration into service entrance, branch, and distribution panels in industrial and commercial settings.
- fixture repair and replacement
- emergency backup integration
- lighting maintenance support
- retrofit support
- code compliance upgrades
- emergency egress support
- service stock for maintenance teams
- field repair projects
The device's ability to operate without upstream overcurrent protection and its fail-safe design make it particularly well-suited for environments where reliability and ease of installation are paramount.
Installation and Long-Term Use
Installation of the CITEL M50-A Series is straightforward, thanks to its threaded 1/2 inch NPT mounting and 36-inch #12 AWG leads. The device is designed for easy integration into existing electrical panels, reducing installation time and complexity. Its compact form factor allows for installation in tight spaces, making it versatile for various panel configurations.
For long-term use, regular monitoring of the LED status indicators and audible alarm is recommended to ensure the device remains in optimal working condition. The SPD's robust construction and high surge current capacity contribute to its longevity, providing reliable protection over time.
How This Fixture Is Commonly Used
The CITEL M50-A Series is commonly used in industrial and commercial settings where surge protection is essential. It is typically installed in service entrance, branch, and distribution panels to protect sensitive equipment from electrical surges. The device's compact design and straightforward installation make it a popular choice for facilities with limited space.
While the SPD provides robust protection, it is important to consider the specific electrical environment when determining the appropriate number of devices to install. In environments with frequent or severe surges, additional protective measures may be necessary to ensure comprehensive protection.
Safety, Certifications, and Warranty
The CITEL M50-A Series is UL 1449 Type 1 Listed, ensuring compliance with industry standards for safety and performance. Its fail-safe design provides continued protection even in the event of a component failure, enhancing its reliability in critical applications.
The device's real-time diagnostics, including LED status indicators and an audible alarm, provide immediate awareness of its operational status, allowing for prompt maintenance if necessary. The SPD is designed for long-term reliability, with a robust construction that ensures consistent performance over time.
Frequently Asked Questions
Q: What is the maximum surge current capacity of the CITEL M50-A Series
A: The CITEL M50-A Series has a maximum surge current capacity of 50kA per mode.
Q: Is the CITEL M50-A Series suitable for outdoor installation
A: Yes, the CITEL M50-A Series is suitable for both indoor and outdoor installations.
Q: Does the CITEL M50-A Series require upstream overcurrent protection
A: No, the CITEL M50-A Series does not require upstream overcurrent protection.
Q: How does the CITEL M50-A Series indicate its operational status
A: The CITEL M50-A Series features LED status indicators and an audible alarm for real-time diagnostics.
Q: What is the voltage protection rating of the CITEL M50-A Series
A: The voltage protection rating of the CITEL M50-A Series is 2500/1500.
Application Questions and Clarification
Q: Can the CITEL M50-A Series be used for emergency backup integration
A: Yes, the CITEL M50-A Series is suitable for emergency backup integration as part of its primary applications.
Q: Is the CITEL M50-A Series appropriate for retrofit support
A: Yes, the CITEL M50-A Series is designed to support retrofit projects, providing surge protection for upgraded systems.
Q: What type of network configuration does the CITEL M50-A Series support
A: The CITEL M50-A Series supports a 3PH, 3W+G, Delta network configuration.
Q: How does the CITEL M50-A Series contribute to code compliance upgrades
A: The CITEL M50-A Series provides surge protection that can be part of code compliance upgrades, ensuring electrical systems meet safety standards.

