Citel 208/120 Volt 50kA Surge Protection Device | 3 Phase Wye
The CITEL M50-A Series surge protective device is an excellent choice for safeguarding electrical panels in industrial control systems, thanks to its robust 50kA surge current protection and hybrid MOV-GSG technology. Its UL 1449 Type 1 listing ensures reliability for service entrance and distribution panels, while the fail-safe design and real-time diagnostics enhance operational safety. Ideal for both indoor and outdoor installations, this SPD is particularly suited for environments like manufacturing facilities and warehouses where electrical stability is crucial.
Dwayne Kula | President, CTO and Founder
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Product Specifications
Key Features
| Brand | Citel |
| SPD Type | UL1449 TYPE 1 LISTED |
| Volts | 208/120 |
| Phase | 3Y WYE |
| Modes | L-L, L-N, L-G, N-G |
| Voltage Protection Rating | 1200/700/1200/1200 |
| Maximum Continuous Operating Voltage | 280/140/140/120 |
| IN | 20 kA |
| SCCR | 150 kA |
| IMAX | 50 kA |
| Technology | MOV-GSG |
| Network Configuration | 3PH, 4W+G, Wye |
| 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-N, L-G, and N-G protection with no leakage current, is suitable for indoor or outdoor installation, and is UL 1449 Type 1 Listed.
Additional Resources
Product Overview
The Citel M50-A Series is a panel-mounted surge protective device for 208/120V, 3-phase Wye electrical systems. It provides surge protection across L-L, L-N, L-G, and N-G modes.
This device is intended for service entrance, branch, and distribution panel installations. It uses MOV-GSG technology and provides 50kA maximum surge current protection per mode.
Core Performance and Output
The device is rated for 208/120V, 3-phase, 4-wire plus ground Wye networks. It has a 20kA nominal discharge current, 50kA maximum surge current rating, and 150kA SCCR.
Voltage protection ratings are 1200V L-L, 700V L-N, 1200V L-G, and 1200V N-G. Maximum continuous operating voltage is 280V L-L, 140V L-N, 140V L-G, and 120V N-G.
Lighting output, efficiency, and beam distribution do not apply to this electrical protection device. The electrical system configuration must match the 208/120V 3-phase Wye rating.
Adjustability and Control Options
This surge protective device has a fixed 208/120V, 3-phase Wye configuration. No field-adjustable voltage, surge-current, or control settings are specified.
Real-time diagnostics include LED status indication and an audible alarm. These indicators provide device status information at the panel location.
Longevity and Reliability
The M50-A Series uses MOV-GSG surge protection technology. The device provides L-N, L-G, and N-G protection with no leakage current.
Fail-safe behavior is included. No upstream overcurrent protection is required.
Build Quality and Physical Characteristics
The device is configured for panel mounting with a threaded 1/2 in NPT connection. It uses 36 in #12 AWG leads for electrical connection.
The supplied product data identifies the device for indoor or outdoor installation. Physical installation must allow access to the LED indicators and audible alarm.
Where This Product Fits Best
This device fits lighting maintenance, fixture repair, retrofit, and emergency backup work where the electrical system uses a compatible 208/120V 3-phase Wye configuration.
- fixture repair and replacement
- lighting maintenance support
- retrofit support
- emergency backup integration
- code compliance upgrades
- field repair projects
It is intended for panel-mounted service entrance, branch, and distribution panel locations. Indoor and outdoor installation is supported by the supplied product data.
Installation and Long-Term Use
Installation uses the threaded 1/2 in NPT mounting connection and 36 in #12 AWG leads. The panel must be part of a 208/120V, 3-phase, 4-wire plus ground Wye network.
Maintain access to the LED status indication and audible alarm after installation. The fail-safe design does not require upstream overcurrent protection.
How This Fixture Is Commonly Used
This is a panel-mounted electrical protection device, so mounting height is not a fixture-placement factor. It is positioned at service entrance, branch, or distribution panels rather than within a lighting layout.
Panel layout must account for the threaded mounting connection and the 36 in lead length. Final placement depends on panel configuration and available mounting access.
Safety, Certifications, and Warranty
UL 1449 Type 1 Listed. UL listed.
The device has a 150kA SCCR and fail-safe behavior. Warranty information is not provided in the supplied product data.
Frequently Asked Questions
Q: What electrical system is this surge protective device designed for?
A: It is designed for 208/120V, 3-phase, 4-wire plus ground Wye electrical systems.
Q: What surge current rating does this device provide?
A: The maximum surge current rating is 50kA per mode. The nominal discharge current rating is 20kA.
Q: How is the device mounted and connected?
A: It uses a threaded 1/2 in NPT mounting connection and 36 in #12 AWG leads.
Q: What should be considered when planning panel placement?
A: Panel configuration, access to the status indicators, the threaded mounting connection, and the 36 in lead length affect placement.
Application Questions and Clarification
Q: Is this device suitable for lighting maintenance support?
A: Lighting maintenance support is a listed application. The electrical system must be a compatible 208/120V, 3-phase Wye network.
Q: Can this device be used for retrofit support?
A: Retrofit support is a listed application. Installation requires a panel-mounted location with a threaded 1/2 in NPT connection.
Q: What status information is available after installation?
A: The device provides LED status indication and an audible alarm for real-time diagnostics.
Web ID: 2780
