V05E30P

© 2014 Littelfuse, Inc.

Specifications are subject to change without notice. 
Revised: 05/23/14

Varistor Products

Radial Leaded Varistors  >  LV UltraMOV

TM

 Series

LV UltraMO

V

 S

eries

Current Energy and Power Dissipation Ratings

100

90

80

70

60

50

40

30

20

10

0

-55

50

60

70

80

90

100 110

120 130 140 150

AMBIENT TEMPERATURE (

o

C)

PERCENT OF 

RA

TED 

VALUE

FIGURE 1. CURRENT, ENERGY AND POWER DERATING 

CURVE

Figure 1A - Power Derating for Epoxy Coated

FIGURE 1. CURRENT, ENERGY AND POWER DERATING 

CURVE

100

90

80
70

60

50
40

30

20

10

0

-55

50

60

70

80

90

100 110 120 130 140 150

AMBIENT TEMPERATURE (

o

C)

PERCENT OF 

RA

TED 

VALUE

Figure 1B - Power Derating for Phenolic Coated

T1

T2

100

50

0

O1

TIME

PERCENT OF PEAK 

VALUE

O1 = VIRTUAL ORIGIN OF WAVE

t1 = VIRTUAL FRONT TIME = 1.25 x t

(IMPULSE DURATION)

t = TIME FROM 10% TO 90% OF PEAK

t2 = VIRTUAL TIME TO HALF VALUE

EXAMPLE:
FOR AN 8/20 s CURRENT WAVEFORM

8 s = t1 = VIRTUAL FRONT TIME
20 s = t2 = VIRTUAL TIME TO

HALF VALUE

FIGURE 2. PEAK PULSE CURRENT TEST  WAVEFORM 

    FOR CLAMPING  VOLTAGE

T

Peak Pulse Current Test  Waveform for Clamping Voltage

0

1

 = Virtual Origin of Wave

T  = Time from 10% to 90% of Peak
T

1

 = Rise Time = 1.25 x T

T

2

 = Decay Time

Example - For an 8/20 

µs Current Waveform:

8µs = T

1

 = Rise Time

20µs = T

2

 = Decay Time

 

Figure 2

For applications exceeding 85ºC ambient temperature, 
the peak surge current and energy ratings must be 
reduced as shown below.

For applications exceeding 125ºC ambient temperature, 
the peak surge current and energy ratings must be 
reduced as shown below.

V05E30P Datasheet Related Products:
V05E30P Information:
Part No.
V05E30P
Description
VARISTOR 42.3V 500A DISC 5MM
File Size
1266311 bytes
Page Size
612 x 792 pts (letter)
All Pages
9
Manufacturer
Littelfuse
Homepage
http://www.littelfuse.com/
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