DITEK D100 SERIES ALTERNATE CITEL M50 SERIES
Surge Protective Device (SPD)

M50 Series	D100 Series
Intended Application System
System Voltage	120-600Vac, Split phase, Wye, and Delta
Configuration	1S, 3Y, 3H, 3D
Features	NEMA 6 Enclosure, 1/2" NPT, Audible Alarm, LED/phase, and Optional (Remote Contacts)

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
UL File #	E326289	E328921
Model	M50-277Y-A	D100-277/4803Y
Product Image	${ITEM_LINK#2178974}<-No Item, #2178974
UL.com Ratings	UL CARD	UL CARD
UL APPROVAL	LISTED	LISTED
UL APPROVAL 1449 5TH ED.	Yes	No (UL 1449 4TH ED.)
UL MARK
SPD Type	1	1
Volt (V)	277/480	277/480
AC/DC DC PV	AC	AC
Phase	3Y	3Y
Amps (A)	n/a	n/a
Ambient Min (C)	-35	0
Ambient Max (C)	80	40
Mode
VPR (Vpk)
L-L L-N L-G N-G	2500 1200 1500 1200	1800 1000 1200 1800
MCOV
L-L L-N L-G N-G	560 320 320 280	640 320 320 640
In (kA)	20	20
SCCR (kA)	150	100
Additional Data Sheet Ratings
Surge Current Rating (kA)	100	100
Protection Circuit	TMOV + GSG	TMOV
Leakage Current	No	Yes
TOV Optimized	Yes	No
Dimensions
Diagnostics	LED Indicator & Audible Alarm Optional (Remote Contacts)	LED Indicator & Remote Contacts
Environmental Rating	Aluminum Cast NEMA 6	Polycarbonate NEMA 4X
Modes of Protection	Common Mode Differential Mode	Common Mode Differential Mode
Warranty	10-years	10-years

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	Yes	No	No	The 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	Yes	Yes	Yes	Yes – 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.

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