Littelfuse FBMOV User Manual
Varistor Products
Industrial High Energy Terminal Varistors > FBMOV Series
FBMOV Varistor Series
Agency Approvals
Agency Agency File Number
E320116
Features
• RoHS compliant and
Lead–free available
• Patent on Integrated
Thermal Protection +
Non Fragmenting Device.
• Designed to facilitate
compliance to UL1449
for SPD product:
• UL 1449 Short circuit
current rating test
section 39.2.
• UL1449 Intermediate
current test section 39.3.
• UL 1449 Limited current
abnormal over voltage
test Section 39.4.
• Will open circuit
without rupture under
100A, 500A, 1,000A,
25,000A and 200,000A
test conditions.
• Peak Current
Rating to 40 kA.
• -55°C to +85°C
operating temperature.
RoHS
Description
The Littelfuse FBMOV Series thermally protected and
non-fragmenting varistor represents a new development
in circuit protection. It consists of a 40kA varistor building
block (MOV) with an integral thermally activated element
designed to open in the event of overheating due to
abnormal over-voltage, limited current conditions.
FBMOV series devices also include a varistor series fuse
which prevents the part from rupturing when subjected to
high fault current (up to 200kA).The tubular fuse-like body
allows for easy mechanical connection in the application.
Another feature of FBMOV is an indicator lead, which may
be connected to monitoring circuitry and used to signal if
the MOV has been disconnected.
FBMOV series devices offer quick thermal response due
to the close proximity of the integrated fusing thermal
element to the MOV body. The integrated configuration
also offers lower inductance than most discreet solutions
resulting in improved clamping performance to fast overvoltage transients.
Applications
• Type 1 SPD (Surge Protection Device) Products
• Power supplies
• Transformer
• Residential Service Panel
• Power distribution
• Telecommunication
• IT/Data Center
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous: FBMOV Series Units
Steady State Applied Voltage:
DC Voltage Range (V
AC Voltage Range (V
Transient:
Non-Repetitive Surge Current, 8/20μs Waveform (ITM) 40,000 A
Non-Repetitive Energy Capability, 2ms Waveform (W
Operating Ambient Temperature Range (T
Storage Temperature Range (T
Temperature Coefficient (a
Hi-Pot Encapsulation (Isolation Voltage Capability) 2500 V
COATING Insulation Resistance >1000 MΩ
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ba or /bb.html for current information.
) 150 to 970 V
M(DC)
) 115 to 750 V
M(AC)RMS
) 340 to 1340 J
) -55 to +85
) -55 to +125
STG
V
) of Clamping Voltage (VC) at Specified Test Current <0.01 %/OC
A
TM
249
Revised: May 8, 2013
O
C
O
C
FBMOV Varistor Series
HI–ENERGY MOV’S FBMOV Series
Varistor Products
Industrial High Energy Terminal Varistors > FBMOV Series
FBMOV Series Ratings & Specifications
Maximum Rating (85°C) Specifications (25°C)
Continuous Transient
Part
Number
AC Volts DC Volts
V
M(AC)RMS
V
M(DC)
Energy
(2ms)
WTM I
Peak
Current
8 x 20μs
Min V
TM
Varistor Voltage at 1mA
DC Test Current
N(DC)
Max VC C
(V) (V) (J) (A) (V) (V) (V) (V) (pF)
FBMOV115M 115 150 340 40000 162 180 198 295 6400
FBMOV130M 130 170 380 40000 184 205 226 335 5600
FBMOV140M 140 180 420 40000 200 220 240 355 5000
FBMOV150M 150 200 440 40000 216 240 264 390 4600
FBMOV175M 175 225 500 40000 243 270 297 450 3800
FBMOV230M 230 300 600 40000 324 360 396 585 3000
FBMOV250M 250 320 660 40000 351 390 429 640 2800
FBMOV275M 275 350 700 40000 387 430 473 700 2500
FBMOV300M 300 385 740 40000 423 470 517 765 2300
FBMOV320M 320 420 780 40000 459 510 561 825 2160
FBMOV385M 385 505 860 40000 558 620 682 1010 1800
FBMOV420M 420 560 920 40000 612 680 748 1100 1640
FBMOV440M 440 585 940 40000 643 715 787 1160 1580
FBMOV460M 460 615 980 40000 675 750 825 1220 1500
FBMOV510M 510 670 1040 40000 738 820 902 1335 1360
FBMOV550M 550 745 1100 40000 819 910 1001 1475 1260
FBMOV625M 625 825 1200 40000 900 1000 1100 1625 1110
FBMOV750M 750 970 1340 40000 1080 1200 1320 1950 920
NOTE: Average power dissipation of transients not to exceed 2.5W. See Figures 3 and 4 for more information on power dissipation.
Maximum
Clamping Volt
V
at 200A
C
Current (8/20μs)
Typical
Capaci-
tance f =
1MHz
Peak Current, Energy and Power De-rating Curve
100
90
80
70
60
50
40
30
20
PERCENT OF RATED VALUE
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
AMBIENT TEMPERATURE (
For applications exceeding 85° C, ambient temperatures, the peak
surge current and energy rating must be reduces as shown in
Figure 1.
o
C)
Peak Pulse Current Test Waveform
100
90
50
10
PERCENT OF PEAK VALUE
O
1
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
T
T
1
T
2
TIME
FBMOV Varistor Series
250
Revised: May 8, 2013
Please refer to www.littelfuse.com/series/ba or /bb.html for current information.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
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