ELECTRONIC COMPONENT SOLUTIONS
WORLD PRODUCTS INC.
TVZ: T
HERMO
-F
USE
V
ARISTORS
TVZ: T
HERMO-
F
USE
V
ARISTORS
19654 Eighth Street East, Sonoma, CA 95476-0517
Phone
Phone (707)
| Fax (707) 996-3380 | www.worldproducts.com
World Products Inc.
19654 Eighth Street East, Sonoma, CA 95476 |
USA •
(707) 996-5201
996-5201 • Fax (707) 996-3380 • www.worldproducts.com
(3-30-05)
Rev. 1.4
Protection Products Catalog |
117
TVZ: T
HERMO
-F
USE
V
ARISTORS
World Products Inc.
19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
Rev. 1.4 (3-30-05)
118
| Protection Products Catalog
TVZ: T
HERMO
-F
USE
V
ARISTORS
Table Of Contents
Description
Features
Part Number Codes
Rating
Dimensions
Specifications
Thermo Characteristic
Soldering Profile
Application
Peak Current Per Pulse Versus Pulse Duration
Temperature Derating Curve Power and Energy Rating vs. Temperature
V-I Characteristics
Taping Specifications
Dimensions of Ammo Box and Reel
119
119
120
120
121
124
128
128
128
129
129
130
132
133
Description
The Thermo-Fuse Varistor (TVZ) is a family of Transient Voltage Surge Suppression products. TVZ is
a three-lead Thermally Protected Metal Oxide Varistor. One lead of the TVZ varistor is connected to a
thermal fuse, which will open when the varistor is subjected to prolonged abnormal over-voltage conditions.
Traditionally, the Metal Oxide Varistor (MOV) can withstand 150% of its rated voltage for a given
duration. Typically, an MOV will initially fail to a short-circuit condition or fail open when subjected to
sustained steady-state over-voltage conditions that exceed rated specifications.
The TVZ incorporates a thermal fuse with an MOV. The TVZ will respond to prolonged over-voltage
conditions by disconnecting the MOV from the power source should the temperature exceed a certain level.
Therefore, the TVZ provides “Fail Safe” protection to sensitive downstream components.
Features
•
•
•
UL1449, UL1414 and cUL recognized.
All TVZ18, TVZ20, TVZ25 and TVZ32 Series Types comply with Accelerated Aging Test
Requirements per ANSI/IEEE C62.11, UL File# E172311.
Low Leakage Current under normal operating voltage and high surge current ratings.
World Products Inc.
19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
Rev. 1.4 (3-30-05)
Protection Products Catalog |
119
TVZ: T
HERMO
-F
USE
V
ARISTORS
Part Number Codes
*Marking: (a) SINCERA. which is the brand name.
(b) Part marking, for example: T20E241K
(c) Date code (backside): Manufactured year and month. (2 digit) (ie: 2002=2,
1-9 for January through September and O for October, N for November, D for December)
TVZ
Thermo- Fuse
ZnO Varistor
DIAMETER
18: 18mm
20: 20mm
25: 25mm
32: 32mm
20
E
241
K
B
S
R
R: 1mm lead diameter for 18mm size
FL: For 25mm minimum fuse lead
(lead #3)
TYPE
D: Standard Disk series
E: High energy series
VARISTOR VOLTAGE
241—24x10
1
— 240 ( DC Volt)
K: Voltage tolerance+/-10%
S: Straight lead (For bulk parts)
N: Bulk parts for 320VAC and larger come
standard with inline crimp (see illustration
below) for straight disc seating on PC boards.
If straight leads are required instead of inline
crimp please use code "N" in the appropriate
position as stated above. (For bulk parts)
3mm max
B: Bulk package
For taped parts see taping specifications
for suffix codes.
Rating
• -55°C to 85°C Operating Temperature Range
• -55°C to 125°C Storage Temperature Range
• Maximum Voltage-Temperature Coefficient:
• Hi-Pot Encapsulation:
• Insulation Resistance:
• Typical Response Time:
• Continuous RMS Current (For Lead - 2, Monitor Lead):
• Isolation Capability (When thermal element is open):
< 0.01
2500
>1000
<15
100
600
%/°C
Vdc
Mohm
nseconds
mA
Vac
World Products Inc.
19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
Rev. 1.4 (3-30-05)
120
| Protection Products Catalog
TVZ: T
HERMO
-F
USE
V
ARISTORS
Dimensions
TVZ Series
Dmax
Hmax
dø (NOM.)
a
b
TVZ18
TVZ20
TVZ25
TVZ32
21.0 (0.83)
23.0 (0.90)
28.5 (1.12)
40.0 (1.57)
24.0 (0.94)
28.0 (1.10)
33.0 (1.30)
45.0 (1.77)
*0.8 (0.031)
1.0 (0.039)
1.0 (0.039)
1.5 (0.06)
7.5 (0.30)
10.0 (0.39)
12.7 (0.50)
17.0 (0.67)
6.5 (0.26)
6.5 (0.26)
6.5 (0.26)
8.0 (0.31)
(1) Unit: mm (inch)
(2) a ± 1.0 (0.039), b ± 1.2 (0.047)
* May be offered with 1.0mm (0.039 inch) lead diameter using suffix “R”. See “Part Number Code.”
Dmax.
Tmax.
3 (Fuse Lead)
Hmax.
TF
2 (Monitor Lead)
25 min.
(0.98)
12.5(0.49) min.
3
1 2
a b
dø
MOV
W2
W1
1
World Products Inc.
19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
Rev. 1.4 (3-30-05)
Protection Products Catalog |
121
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