WORLD PRODUCTS INC. 19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com

Rev. 12.3

4 | Thermally Protected Varistors

Part Number System

TVZ 20 E B N 241 K B S

(1) (2) (3) (4) (5)

(6) (7) (8) (9)

(1) Thermally Protected Varistor

(2) Diameter

14: 14mm

18: 18mm

20: 20mm

25: 25mm (available in round and rectangular type)

34: 34mm

(3) Energy Rating

D: 25mm (round type)

E: 14mm, 18mm & 20mm

R: 25mm (rectangular type), 34mm

(4) Fuse Location

Blank: 3-Leaded, Thermal Link Located on Third Lead

(Available in 25mm round type)

B: 2-Leaded, No Monitor Lead

(Available in 14mm, 18mm, 20mm, 25mm [both

round and rectangular type] & 34mm)

C: 3-Leaded, Thermal Link Located on Second Lead

(Available in 14mm, 18mm, 20mm, 25mm

(rectangle type**) & 34mm)

(5) N: RoHS Compliant Series

(6) Varistor Voltage/AC Voltage

Varistor Voltage for 14, 18, 20, & 25mm,

AC Voltage for 34mm,

151 = 150VAC

(7) Tolerance

K: ±10%

(8) Packaging

B: Bulk

For taped and lead configuration of taped parts,

see taping specifications for suffix codes.

(9) Lead Configuration for Bulk Parts Only

S: For 34mm series denotes Standard Lead.

S: Straight (For varistor voltage ≤681K), and in-line

crimped (for varistor voltage >681K) for 14, 18, 20 &

25mm series.

L: In-line crimped (For varistor voltage ≤681K) for 14,

18, 20 & 25mm series.

N: Varistor voltage >681 come standard with in-line

crimp (see illustration below) for straight disc seating

on PC boards. If straight leads are required instead of

in-line crimp please use code “N” in this position, for

14, 18, 20 & 25 mm series.

(10)Suffix for Custom Types

X33: Alternative Design with 3mm Monitor Terminal

(34mm only). See Fuse Configuration & Dimensions

for 34mm for more information.

In-line Crimp (3 leaded type)*

3mm max.

In-line Crimp (2 leaded type)

Absolute Maximum Ratings***

Continuous RMS Current (Monitor Lead)

100mA

Typical Response Time

<15n seconds

Insulation Resistance

>1000MΩ

Hi-Pot Encapsulation

2500 VDC

Maximum Voltage-Temperature Coefficient

<0.01%/°C

Operating Temperature Range

-55°C to 85°C

Storage Temperature Range

-55°C to 125°C

Isolation Capability

(when thermal element is open)

600VAC

NOTES:

*For 3 leaded 14mm, 18mm, and 20mm types with in-line crimp

monitor lead is straight. For 25mm round and rectangular types

monitor lead is in-line crimped.

**25mm (rectangle type) 3-leaded version has fuse located on the

third lead (same as 25mm round type).

***Stresses above those stated in

Absolute Maximum Ratings

may cause permanent damage to the device. These are stress only

ratings and operation of the device at these or any other conditions

exceeding these ratings is not implied.