Varistor Products

Revision: October 29, 2009

©2009 Littelfuse, Inc.

DA/DB Varistor Series

Industrial High Energy Terminal Varistors > DA/DB Series

Specifications are subject to change without notice.

Please refer to www.littelfuse.com/series/da or /db.html for current information.

Repetitive Surge Capability

Maximum Clamping Voltage

V131DA40 - V751DA40 and V131DB40 - V751DB40

200

6,000

5,000

4,000

3,000

1,000

900

800

700

600

500

400

300

MAXIMUM CLAMPING VOLTAGE

DISC SIZE 40mm

130 TO 750 VM(AC) RATING

V421DA/DB40

V151DA/DB40

V751DA/DB40

PEAK AMPERES (A)

V131DA/DB40

V321DA/DB40

V271DA/DB40

V251DA/DB40

V511DA/DB40

V481DA/DB40

V571DA/DB40

V661DA/DB40

2,000

Operating/Storage

Temperature

-55°C to +85°C/ -55°C to

+125°C

Humidity Aging

+85°C, 85% RH, 1000 hours

+/- 5% typical resistance

change

Thermal Shock

+85°C to -40°C 10 times

+/- 5% typical resistance

change

Solvent Resistance

MIL–STD–202, Method 215F

Moisture Sensitivity

Level 1, J–STD–020C

Lead Material

DA - Copper, Tin–plated

DB - Brass, Tin–plated

Insulating Material

Cured, flame retardant epoxy polymer

meets UL94V–0 requirements.

Device Labeling

Marked with LF, part number and date

code

Physical Specifications

Environmental Specifications

NOTE: If pulse ratings are exceeded, a shift of V

+/-10% could result. This type of shift, which normally results in a decrease of V

result in the device not meeting the original published specifications, but it does not

prevent the device from continuing to function, and to provide ample protection.

V131DA40 - V751DA40 and V131DB40 - V751DB40

Figure 3

Figure 4

DISC SIZE 40mm

V131DA40 - V751DA40

50,000

20,000

10,000

5,000

2,000

1,000

500

200

100

50

20

10

20

100

1,000

10,000

IMPULSE DURATION (μs)

V131DB40 - V751DB40

2

1

INDEFINITE

10