B40K250 EPCOS Inc, B40K250 Datasheet - Page 17

• Manufacturer Part Number: B40K250
• Description: VARISTOR BLOCK 250VRMS 40MM
• Manufacturer: EPCOS Inc
• Series: HighEr

Specifications of B40K250

• Varistor Voltage: 390V
• Current-surge: 40kA
• Number Of Circuits: 1
• Maximum Ac Volts: 250VAC
• Maximum Dc Volts: 320VDC
• Energy: 490J
• Package / Case: Chassis Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: B72240B 251K 1; B72240B0251K001; B72240B251K1

Derating curves
Maximum surge current i
For explanation of the derating curves refer to “General technical information”, section 1.8.1
i
SIOV-B60K550 … K1000
SIOV-B80K130 … K1100
Please read Cautions and warnings and
Important notes at the end of this document.
i
max
max
10
10
10
10
10
10
10
10
10
10
10
10
A
5
5
5
5
A
5
5
5
5
5
4
3
2
0
1
5
4
3
0
10
2
1
10
1
1
max
5
5
= f (t
10
10
r
, pulse train)
2
2
10
10
10
10
10
10
10
10
10
10
1x
10
1x
10
2
3
4
5
6
2
3
4
5
6
17
5
5
11/07
10
10
3
3
Block varistors
HighE series
t
t
r
r
5
5
VAR0096-6
VAR0069-9
t
t
i
i
µs
r
µs
r
max
max
10
10
4
4