Varistor Products
©2012 Littelfuse, Inc.
Revision: February 9, 2012
ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Part Numbering System
For “VARISTOR”
NOMINAL VOLTAGE
(V
NOM
)
(One, Two or Three Digits)
V XXX ZA XXXX
RELATIVE ENERGY INDICATOR
(One or Two Digits)
LEAD-FREE, HALOGEN-FREE AND
RoHS COMPLIANT INDICATOR
P
See OPTIONS CODES notes below
XXXXX
OPTION CODES
(See notes below)
BASE PART CODES
(See Ratings & Specifications tables and notes below)
SERIES + PACKAGING / LEAD STYLE
DESIGNATOR
(See BASE PART CODES notes below)
ZA = Bulk Pack / Straight Leads (standard)
ZC = Bulk Pack / Crimped and Trimmed Leads
ZS = Tape and Reel / Straight Leads
ZT = Tape and Reel / Crimped Leads
ZU = Tape and Reel / Under-Crimped Leads
Ordering Notes:
Series + Packaging / Lead Style Designators:
Ordering examples:
Straight
Lead
Bulk Pack
(standard)
Straight
Lead
Tape &
Reel
Crimped
Lead
Tape &
Reel
Crimped &
Trimmed
Lead
Bulk Pack
Under-
Crimp Lead
Tape &
Reel
V18ZA3P
V18ZS3P V18ZT3P V18ZC3P V18ZU3P
Standard Model Order As
V18ZA40P V18ZA40PX1
0
-JUUFMGVTF;"4FSJFTWBSJTUPSTBSFTIJQQFETUBOEBSEJOCVMLQBDL
XJUITUSBJHIUMFBETBOEMFBETQBDJOHPVUMJOFEJOUIF1BDLBHF
%JNFOTJPOTTFDUJPOPGUIJTEBUBTIFFU$POUBDUZPVS-JUUFMGVTF
sales representative to discuss non-standard options.
Tape & Reel Quantities:
Crimped lead ZA Series varistors are supplied standard in tape and
reel, denoted with "ZT."
;$TUZMFJTTVQQMJFEJOCVMLPOMZ
"ZU" style is supplied in tape and reel only.
For crimped leads without trimming and any varitions other than that
EFTDSJCFEBCPWFQMFBTFDPOUBDU-JUUFMGVTF
Packaging and Quantities:
Device Size Voltage
Quantity Per Reel
"S" Reel "T" Reel "U" Reel
5mm All 1000 1000 1000
7
mm All 1000 1000 1000
10mm All 500 500 500
14mm < 300V 500 500 500
20mm < 300V 500 500 400
For standard parts, use the BASE PART designator only.
'PSQBSUTXJUIOPOTUBOEBSEPQUJPOTTVDIBTBEEJUJPOBMGPSNQBDLBHJOH
and lead space options), use BASE PART + OPTION CODE.
OPTION CODE items are subject to availability and minimum order
SFRVJSFNFOUT1MFBTFDPOUBDUB-JUUFMGVTFQSPEVDUTSFQSFTFOUBUJWFGPS
BEEJUJPOBMJOGPSNBUJPOPSRVFTUJPOT
BASE PART CODES: OPTION CODES:
Standard Model Order As
V18ZA40P V18ZA40PX2855
X1
0:..-&"%41"$*/(015*0/
For 10 -/+1 mm (0.394-/+0.039 in) lead spacing (available
on 20mm diameter models only), append standard
NPEFM#"4&1"35OVNCFSXJUI9&YBNQMF
X2855:/JDLFM#BSSJFS$0"5&%8*3&015*0/
"MMTUBOEBSEQBSUTVTF5JOo$PBUFE$PQQFSXJSF/JDLFM
Barrier Coated wire is available as an option, consisting
PG$PQQFSXJSFXJUIBnBTIJOHPG/JDLFMGPMMPXFECZ
a top coating of Tin. To order append standard model
#"4&1"35OVNCFSXJUI9&YBNQMF
X1347:)J5FNQFSBUVSFQIFOPMJDDPBUJOHPQUJPO
1IFOPMJD$PBUFE$***4FSJFTEFWJDFTBSFBWBJMBCMFXJUIJNQSPWFE
NBYJNVNPQFSBUJOHNBYJNVNUFNQFSBUVSFPG¡$
5PPSEFSBEE9UPFOEPGQBSUOVNCFS
(Example:
7;"19).
For additional information please refer to the section labeled
"Phenolic Coating Option" within this document.