B72240B251K1 EPCOS Inc, B72240B251K1 Datasheet - Page 7

• Manufacturer Part Number: B72240B251K1
• Description: Varistors 250V RMS 40MM Varistor B40K250
• Manufacturer: EPCOS Inc
• Type: MOVr

Specifications of B72240B251K1

• Voltage Rating Dc: 320 V
• Voltage Rating Ac: 250 V
• Clamping Voltage: 650 V
• Peak Surge Current: 40 KA
• Capacitance: 2900 pF
• Operating Temperature Range: - 40 C to + 85 C
• Mounting: Screw
• Tolerance: 10 %
• Brand/series: E Series
• Current, Peak: 40000 A
• Current, Surge: 40000 A
• Dimensions: 60 mm W x 55 mm H x 14 mm T
• Electric Strength: ≥2.5 kV (RMS) (Min.)
• Energy Rating: 490 Joules
• Mounting Style: Leaded
• Package: Screw
• Power Rating: 1.4 W
• Resistance, Insulation: ≥10 Megohms (Min.)
• Technology: Metal Oxide
• Temperature, Operating, Maximum: 85 °C
• Temperature, Operating, Minimum: -40 °C
• Terminal Type: Screw
• Voltage, Ac: 250 VAC
• Voltage, Clamping: 650 V
• Voltage, Dc: 320 VDC
• Voltage, Operating: 250 Vrms⁄320 VDC
• Voltage, Varistor: 390
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: B72240B0251K001

Reliability data for CECC approved types
Test
Varistor voltage
Clamping voltage
Max. AC operating voltage
Surge current derating,
8/20 µs
Surge current derating,
2 ms
Electric strength
Please read Cautions and warnings and
Important notes at the end of this document.
Test methods/conditions
The voltage between two terminals with
the specified measuring current applied
is called V
The maximum voltage between two
terminals with the specified standard
impulse current (8/20 µs) applied.
CECC 42 000, test 4.20
1000 h at UCT
After having continuously applied
the maximum allowable voltage at UCT
±2 °C for 1000 h, the specimen shall be
stored at room temperature and normal
humidity for 1 to 2 h.
Thereafter, the change of V
measured.
Thereafter, insulation resistance R
shall be measured according to
CECC 42 000, test 4.8 at V = 500 V.
CECC 42 000, test C 2.1
100 surge currents (8/20 µs), unipolar,
interval 30 s, amplitude corresponding
to derating curve for 100 impulses at
20 µs
CECC 42 000, test C 2.1
100 surge currents (2 ms), unipolar,
interval 120 s, amplitude corresponding
to derating curve for 100 impulses at
2 ms
CECC 42 000, test 4.7
Metal balls method, 2500 V
The varistor is placed in a container
holding 1.6 ±0.2 mm diameter metal
balls such that only the terminations of
the varistor are protruding.
The specified voltage shall be applied
between both terminals of the speci-
men connected together and the elec-
trode inserted between the metal balls.
v
(1 mA
HighE, standard, LS40 series
DC
7
@ 0.2 … 2 s).
11/07
RMS
v
shall be
Strap varistors
, 60 s
ins
Requirement
To meet the specified value.
To meet the specified value.
|
R
|
(measured in direction
of surge current)
No visible damage
|
(measured in direction
of surge current)
No visible damage
No breakdown
∆V/V (1 mA)
∆V/V (1 mA)
∆V/V (1 mA)
ins
≥10 MΩ
|
|
|
≤10%
≤10%
≤10%