Maida Development Company -
sales@maida.com
- (757) 723-0785
STANDARD MARKING
Minimum marking shall consist of an
abbreviated style designation and, when
space is available, the manufacturer’s
initials or company logo.
For example:
MDC
Z131
20UL
Where:
MDC - Company Initials
Z -
Zinc Oxide Varistor
131 -
AC Voltage rating (130VAC)
20 -
Rating code
UL -
UL recognition, if applicable
A manufacturing date code and/or
special markings are available upon
request.
Other safety agency designations are
included where applicable.
Z
X
d NOM.
Lead Length
Y
H
D
T
STANDARD
SERIES
INTRODUCTION
D 65 21 ZOV 131 RA 20
1. Coating
Designation
D – Standard Epoxy Coating
P – Phenolic Coating
Neither – Denote no conformal
coating.
2. Nominal Disk Diameter
56 – 3mm
69 – 14mm
58 – 5mm
79 – 15mm
73 – 7mm
64 – 16mm
68 – 8mm
63 – 18mm
61 – 10mm
65 – 20mm
71 – 11mm
66 – 25mm
62 – 12mm
3. Lead
Configuration
(Refer to lead codes)
4. Material
Identifier
Zinc Oxide Varistor
5. AC Voltage Rating
Two significant figures plus number
of zeroes that follow, i.e. 131 is 130 VAC
6. Special
Instructions,
RA is standard
7. Rating
Code,
up to four numbers
The Standard Series is our broadest and most
comprehensive line of radial-leaded varistors. These
components consist of wire leads and have nominal
disk diameters from 3mm to 25mm. They are
available with maximum continuous operating
voltages (MCOV) ranging from 11VAC to 1000VAC
(up to 1500VAC upon request).
The Standard Series is designed to handle most low
and medium power applications requiring through-
hole components. Most sizes are available in Tape
and Reel and ammo pack.
For a complete listing of Maida Development
Company’s IEC ANNEX Q certified devices please
see Appendix B of this catalog.
STYLE DESIGNATION
The Maida Style Number is the typical means to
identify our components when ordered. The style
number identifies several parameters that are
important for the characteristics of the device. An
alternative ordering method, if known, is by our Item
Number.
The following example is the standard part
numbering system when ordering our Standard
Series components by the Maida Style Number:
1