Surge Suppression, LLC ST3-503Y2A Alternate CITEL M50F-277Y-B Surge Protector SPD

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Surge Suppression, LLC ST3-503Y2A Alternate CITEL M50F-277Y-B
Surge Protective Device (SPD)

M50F-277Y-B
ST3-503Y2A

Intended Application System

System Voltage480/277V
Number of Phases3 Phase WYE
Conductors3 Wire + Neutral + Ground
ConfigurationWYE

PRODUCT COMPARISON TABLE

This page collects publicly available data from ul.com and assembles a side by side reference table for a convenient product cross reference.

Manufacturer Citel Logo
UL File #E326289E340498
Model
M50F-277Y-B


ST3-503Y2A

Product Image

UL.com Ratings


UL CARD

UL CARD
UL APPROVALLISTEDLISTED
UL MARK
SPD Type21
Volt (V)480/277480/277
AC/DC
DC PV
ACAC
Phase3Y3Y
Amps (A)n/an/a
Ambient Min (C)-35-35
Ambient Max (C)8040
VPR (Vpk)
L-L
L-N
L-G
N-G
2500
1200
1500
1200
2500
1200
2500
1200
MCOV
L-L
L-N
L-G
N-G
560
320
320
280
640
320
320
320
In (kA)2020
SCCR (kA)150200

Additional
Data Sheet Ratings

Surge Current
Rating (kA)
50-
Protection CircuitHybrid MOV-GSG Technology-
Leakage CurrentNo-
TOV OptimizedNo-
DiagnosticsLED Indicator &
Remote Contacts
-
Environmental
Rating
ROHS-
# of Wires5-
Modes of ProtectionCommon Mode
Differential Mode
-
Warranty10-years5-years
Notes
(1) ETL Listing Director does not publish data visible to the public except for model names. UL.com has a manufacturers key test data available to the public which helps specifiers to compare key performance and safety data across different manufacturers.

Determining the acceptability of an SPD for UL 508A Control Panels and All Other UL Listed Equipment

The UL inspector will first consider the SPD type when determining it’s acceptability for a given application or piece of equipment. This will include UL 508A as well as all other UL Listed equipment. The first level compliance is based on the UL Approval (LISTED or RECOGNIZED) of the SPD or UL SPD Type and it’s Suitable Ratings. This means that it has to meet all safety, performance, environmental and electrical system ratings of the application. If any of these criteria are not fully met, it will require a Procedure Description, a File Update and/or Additional Testing. These actions will require additional costs that may be substantial. For this reason, it is in the interest of the specifier to use UL LISTED SPD’s to eliminate any uncertainty or to make sure the UL RECOGNIZED SPD is selected at the time of UL submittal of the equipment.

Approval Considerations Table based on UL SPD Type

UL
Mark
UL1449
SPD Type
Suitable
Ratings
Procedure
Described
File
Update or
Additional
Testing
Notes
1

2
YesNoNoThe only requirement is that the SPD must match electrical and environmental ratings of the UL 508A Control Panel.

A UL field inspection of the control panel with the SPD installed is required as a part of a standard follow-up service visit.
1CA

2CA

4CA

5
YesYesYesYes – All UL recognized SPD’s require a UL engineering evaluation of the SPD’s existing UL1449 E–file.

This will result, at a minimum, in a cost to update the UL file and may also require testing that would result in additional costs.
UL data is publicly available with a free account at UL.com. The data has been reviewed by our engineering department. From time to time, the applicants UL file (including CITEL's) may become changed or updated at UL.com due to new testing or corrections to a report. At the time of this comparison you will find this information to be accurate to the UL web site. If you find any information requires an update, please bring to our attention and it will be updated immediately.

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Where to purchase Citel SPD's