T
hermally
P
roTecTecTed
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
2
2
3
4
4
5
12
22
24
26
28
28
29
29
World Products, LLC TVZ series is a two or three-leaded
Thermally Protected Metal Oxide Varistor
One lead of the TVZ varistor is connected to a thermal link 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 were originally designed to protect equipment from surges at the specified rated voltage, 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 link 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, LLC 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 thermal link element opens.
As a result of the integration of the thermal link attached to the MOV disc, Thermally Protected Varistors provide an instant
response to unexpected over-voltage situations. World Products, LLC 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.
CAUTION:
Thermally Protected Varistors are intended, in conjunction with appropriate enclosure design, to help facilitate
SPD module compliance to UL 1449. Under extreme abnormal over-voltage conditions, some units will exhibit substantial
heating, arcing and venting prior to opening. Modules must be designed to contain this possibility. Application testing is strongly
recommended.
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 thermally protected varistor should never 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
Thermally Protected Varistors | 1
Rev. 12.3
T
hermally
P
roTecTecTed
V
arisTors
Features
•
•
•
•
•
•
•
•
•
•
RoHS compliant types available
UL1449, UL1414 and CUL recognition or pending status.
Patented product (U.S. Patent #6636403 and IE010410).
Low Leakage Current under normal operating voltage.
S
T2 IN
0E CE
B 2 RA
71
K
61
1
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.
ISO and TS16949 certification.
SINCERA
T25D271K
611
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
A
ER 71K
1
NC 2
61
SI 8EC
T1
Approvals
APPROVALS
14mm
18mm
20mm
25mm
(Round Type)
(1)
RoHS Series 120VAC
through 420 VAC
(2)
Standard
(non-RoHS) Series 130
VAC through 195 VAC
25mm
(Rectangular Type)
34mm
UL and CUL 1449
Third Edition (includes UL60691)
File #E321567**
UL and CUL1414****
File #E71602
VDE
File #40037747
QC 42201 - C002:2012-02
QC 42201 - A002:2012-02
IEC 60950-1: 2005 Annex Q
IECQ-C BSI 12.001
IEC 61051-2 1991-01
IEC 61051-1 2007-04
IEC 61051-2-2 1991-01
CB SCHEME
Certificate Number C580610
VDE
RoHS Series
ALL VALUES
Non-RoHS &
RoHS Series
Non-RoHS and
RoHS Type
Series 115VAC
through 420VAC
Non-RoHS &
RoHS Series
RoHS Series
ALL VALUES
Non-RoHS &
RoHS Series
RoHS Series
ALL VALUES
N/A
RoHS Series
ALL VALUES
Non-RoHS &
RoHS Series
Non-RoHS &
RoHS Series***
RoHS Series ALL VALUES
** 18mm and 25mm sizes recognized to SPD Application Category Type 2.
Note:
Non-RoHS TVZ approvals expire March 16, 2016.
*** with the exception of 120 VAC rated part.
****Metal Oxide Varistors may not be recognized to UL1414 from December 25, 2013.
WORLD PRODUCTS INC.
19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
2 | Thermally Protected Varistors
Rev. 12.3
T
hermally
P
roTecTecTed
V
arisTors
Part Marking
(1)
T 14 EB N 241 K
(2)
(3)
(4)
(5)
(6)
Standard Version
SINCERA
T14EB241K
740
(1) T = TVZ Series
(2) Disc Diameter
14 =
14mm
18 =
18mm
20 =
20mm
25 =
25mm (available in both round and rectangle types)
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 =
25mm (rectangle type), 34mm Disc Size (Two Leads)
RC =
25mm (rectangle type), 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
Thermally Protected Varistors | 3
Rev. 12.3
FPGA/CPLD
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
