T
hermally
P
roTecTed
V
arisTors
Table of Contents
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part Number System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Configuration and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Characteristics & Soldering Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V-I Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taping Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Bulk Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carton Size of Bulk Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Line Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
126
126
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127
128
128
129
136
146
148
150
152
152
153
153
World Products Inc. TVZ series is a two or three-leaded
Thermally Protected Metal Oxide Varistor
One lead of the TVZ varistor is connected to a thermal fuse which is designed to open when the varistor is under
sustained abnormal over-voltage conditions. The TVZ series is designed to meet the abnormal over-voltage requirements
of UL 1449 3rd edition, Section 39.4.
Traditional Metal Oxide Varistors withstand 150% of its rated voltage for a given duration. But Metal Oxide Varistors
may fail to a short-circuit condition or fail to open when subjected to sustained steady-state over-voltage above its
rated specifications. TVZ has a thermal fuse integrated with an MOV disk that responds to the MOV temperature and
disconnects the MOV from the line, should the temperature or voltage exceed a certain level.
World Products Inc. three-leaded device is designed to be connected, via the monitor lead, to an indicator (such as an LED)
to provide diagnostic features indicating if the MOV is disconnected from the circuit in the event the fuse element opens.
As a result of the integration of the thermal fuse attached to the MOV disc, Thermally Fused Varistors provide an instant
response to unexpected over-voltage situations. Lower inductance is another benefit of the inclusion of a thermal fuse,
enhancing clamping performance to sudden over-voltage transients. World Products Inc. Thermally Protected Varistors
offer protection to sensitive downstream electric components.
Additionally, TVZ varistors are wave solderable which simplifies end product assembly by reducing the expense and
rework associated with hand soldering operations.
Proper design of surge protective devices (SPD’s) require that they meet new UL1449 3rd Edition requirements
for abnormal over-voltage limited current. Fuses that are meant to protect the system for large fault currents do
not address the need to protect against low fault currents. These low fault currents can result in catastrophic
failure prior to tripping the higher current fuse. TVZ series varistors can meet the needs of the SPD designer,
avoiding having to create a complicated/high cost approach.
The thermo link in a thermo-fuse varistor is not intended to be used in series with the load. It is only used to
provide protection to the varistor portion in case of an abnormal over voltage condition.
World Products Inc.
19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
Protection Products Catalog |
125
Rev. 9.9 (03.16.09)
T
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Features
•
•
•
•
•
•
•
•
•
•
•
•
RoHS compliant types available
UL1449, UL1414 and CUL recognition or pending status.
Patented product (Patent #6636403).
UL1449 3rd edition abnormal over-voltage test (10A, 5A, 2.5A, 0.5A and 0.125A)
recognition pending.
Wave solderable.
High Surge Current Rating up to 40kA.
-55°C to 85°C Operating Temperature Range.
Three leaded versions available, with fuses located on either the third or second
lead.
Compliance with Accelerated Aging Test Requirements per ANSI/IEEE C62.11
pending.
UL60691 recognition pending.
ISO and TS16949 certification.
SINCERA
T25D271K
611
S
T2 IN
0E CE
B2 RA
71
K
61
1
Low Leakage Current under normal operating voltage.
A
ER 71K
1
NC 2
61
SI 8EC
T1
Applications
•
Transient Voltage Surge Suppressor (TVSS) Products
•
•
•
•
•
•
•
•
•
AC Panel Protection Modules
AC Line Power Supplies
Surge Protected Strip
AC Power Meters
Uninterruptable Power Supply
White Goods
Inverters
DIN Rail
AC/DC Power Supplies
Approvals
14mm
18mm
20mm
25mm
Standard Series
130VAC through
195VAC only. Other
values pending.
34mm
UL and CUL 1449
Third Edition (includes
UL60691)
File # E321567
UL and CUL 1449
Second Edition
File #E196885
UL and CUL1414
File # E71602
VDE IEC-CECC spec
*with exception of 750VAC rated part.
Pending
Pending
Pending
Pending
RoHS Series
Only
√
Pending
RoHS Series
Only
√
Pending
RoHS Series
Only
√
Pending
RoHS Series
Only *
√
Pending
RoHS Series
Only
√
Pending
World Products Inc.
19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
126 |
Protection Products Catalog
Rev. 9.9 (03.16.09)
T
hermally
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V
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Part Marking
(1)
T 14 EB N 241 K
(2)
(3)
(4)
(5)
Standard Version
SINCERA
T14EB241K
740
(6)
(1) T = TVZ Series
(2) Disc Diameter
14 =
14mm
18 =
18mm
20 =
20mm
25 =
25mm
34 =
34mm
(3) Type
DB =
25mm Disc Size (Two Leads)
D =
25mm Disc Size (Three Leads)
EB =
14mm, 18mm & 20mm Disc Size (Two Leads)
EC =
14mm, 18mm & 20mm Disc Sizes (Three Leads)
RB =
34mm Disc Size (Two Leads)
RC =
34mm Disc Size (Three Leads)
(4) N =
RoHs Compliant Series
(5) Varistor Voltage
241
= 24 x 10
1
= 240
(6) Tolerance
K =
±10%
Date Code
RoHS Compliant Version
SINCERA
T14EBN241K
740
RoHS
Compliant “N”
Date Code
Date Code
740 =
First digit represents year (7 = 2007).
Second and third digits represent the week of the year.
NOTE:
Parts will be marked
SINCERA.
(This is the brand name.)
World Products Inc.
19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
Protection Products Catalog |
127
Rev. 9.9 (03.16.09)
Microcontroller MCU
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