t14ebn241k World Products, Inc., t14ebn241k Datasheet - Page 3

• Manufacturer Part Number: t14ebn241k
• Description: Thermally Protected Varistors
• Manufacturer: World Products, Inc.

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 [phone] | Fax [phone] | www.worldproducts.com
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