BM351M
Order Co
ode: BM3
351M
Gas Discharge Tube
s
Fea
atures
Si Design 8.3×8.3×6mm
ize
m
High Current H
H
Handling Ca
apability 20,00
00A @ 8/20μ
μs
Low Capacitan and Inser
L
nce
rtion Loss
Fast Response and Long Se
e
ervice Life
Reliable to Pro
R
otect Electros
static Surge
Moisture sensi
M
itivity level
：
Level 1
Versi
ion: A0 2013-09-14
Ex
xterior
SM
MD
Application in
nformation
DC
D Power
`
Pa
ackage (Top View)
p
1
2
Age
ency Appro
ovals
Icon
n
Description
Compliance with 2011/65/EU
C
h
Compliance with IEC61249-2-21:2003
C
h
Mean lead free
M
Compliance with UL1449, Certif
C
h
ficated E337906
Sc
chematic Sy
ymbol
1
2
Elec
ctrical Param
meter
DC Breakd
down Voltage
1
）
2
）
e
Impulse Sp
park-over Vol
ltage
Impulse Dis
scharge Current
3
）
Arc Voltage
c
Insulation Resistance
Capacita
ance at 1 MH
Hz
Weight
W
Op
perating and storage Temp
perature
Marking
M
100V/s
s
At 1kV/
μs
At 1kV/
μs
8/20μs ±5t
times
At 1A
DC=100
0V
V
DC
=0.5
5V
280-420
for 99 % of measured va
f
alues
650
Typical values of distrib
bution
600
0
20,000
~15
≥1
≤1.5
~1.75
-40-90
Without
V
V
V
A
V
GΩ
Ω
pF
F
g
℃
1) A delivery AQ 0.65 level II GB/T 282
At
QL
28.1-2003
2) In ionized mod
n
de
3) Te
Terms and cur
rrent waveform in accordance with ITU Rec. K. 12; IEC 6164
ms
U-T
43-21
1/3
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encent.com
m.cn
Specifications a subject to ch
S
are
hange without n
notice.
Customers should verify actua device perfor
al
rmance in their specific applications
BM351M
Order Co
ode: BM3
351M
Gas Discharge Tube
s
Par Numberin System
rt
ng
BM
351
M
(1)
(2)
（3
3）
(1) Bencent SM
MD Gas Disch
harge Tube w
with 8.3×8.3×
×6
L×W×H) (mm dimension
m)
(L
(2) DC Breakdown Voltage, e. 351=35×10
1
=350V
.g.,
0
(3)
Tolerance is DC Brea
akdown Voltage, M=±20%
%,
N=±30%
Versi
ion: A0 2013-09-14
Pr
roduct Char
racteristics
Lead Mater
rial
Body Mater
rial
Terminal Fin
T
nish
Copp
per
Ceram
mics
1
100% Matte-
-Tin Plated
Env
vironmental Reliability Characteri
l
y
istics
Testing items
T
s
Hi Temperatu Storage T
igh
ure
Test
Lo Temperatu Storage T
ow
ure
Test
Vib
bration
Re
esistance of so
oldering heat
t
Techn
nical standard
ds
Tempera
ature: 85℃
Time:2H
H
Tempera
ature: -40℃
Time:2H
H
Frequenc
cy：10-500H
Hz
Amplitu
ude：0.15mm
m
Time：4
45mins
Tempera
ature: 260±5℃
℃
Time of dip soldering
g：10s，1tim
me
Not Up-screen program ca be specifie by custom
te:
n
an
ed
mer’s request via contactin Bencent s
ng
service
Sol
lderability test
Sold
derability
Solder Pot Tem
S
mperature:
Solder Dwe Time:
ell
245
5℃±5℃
4-6 seconds
6
Pro
oduct Dimen
nsions
REF
A
B
C
D
E
F
mm
Φ9.3±0.
.1
4.2±0.1
1
8.3±0.2
2
8.3±0.2
2
0.5±0.05
6±0.2
inch
Φ0.366±0.004
Φ
4
0.165±0.004
0
0.327±0.008
0
0.327±0.008
0
0.02±0.002
0.236±0.008
0
Rec
commended soldering pad
d
REF
A
B
C
mm
7.95
4.5
8
inch
0.313
0.177
0.315
2/3
www.be
encent.com
m.cn
Specifications a subject to ch
S
are
hange without n
notice.
Customers should verify actua device perfor
al
rmance in their specific applications
BM351M
Order Co
ode: BM3
351M
Gas Discharge Tube
s
refl profile
low
Reflow Condition
Pre
Hea
at
Versi
ion: A0 2013-09-14
Pb-
-Free assemb
bly
150°
°C
200°
°C
60 – 180 secs
/second max
3°C/
T
L
Tempe
erature Min
Tempe
erature Max
Time
（min
to ma
ax）
t
P
T
P
Ra
amp-up
T
L
Ramp-down
Preheat
T
S(min)
Critica Zone
al
T
L
to T
P
Av
verage ramp u rate（Liqu
up
uids）
Tam
mp（T
L
）
to peal
o
T
S
(
(max) to T
L
- Ramp-up Ra
ate
emperature (T
L
)
T
- Te
Ref
flow
(Li
iquids)
- Te
emperature (T
L
)
T
Pea Temperatu (T
p
)
ak
ure
Tim within 5°C of actual peak
me
C
Tem
mperature (t
p
)
Ra
amp-down Ra
ate
Tim 25°C to pe Temperature
me
eak
(T
p
)
Do not exceed
o
3°C/
/second max
217°
°C
60 – 150 seconds
260+
+0/-5 °C
20 – 40 seconds
6°C/
/second max
8 mi
inutes Max.
260°
°C
p
Temperature
T
S(max)
t
S
25
time to peak temper ature
t
Time
Package Reel I
Information
n
REF
F
P0
D0
0
P1
P2
A
B
F
E
W
D
D1
D2
2
W1
1
OUTLINE
E
TAPING
G
REEL
(PCS)
500
INSID
DE
CARTO
ON
(PCS
S)
1000
0
PER CARTO
P
ON
(PCS)
8000
m
mm
4.0
0±0.1
Φ1
.5
﹢
0.1
-0
12±0.1
2.0
0±0.1
6.5
±0.2
8.4
±0.2
7.5
5±0.1
1.75
5±0.1
16±0.3
Φ3
30±2
00±2
Φ10
3±0.15
Φ13
21
1±2
inch
0.157±0.00
04
04
Φ0.059
+0.00
-0
0.472±0.00
04
0.079±0.00
04
0.256±0.00
08
0.331±0.00
08
0.295±0.00
04
0.069±0.00
04
0.63±0.01
2
Φ12.99±0.0
079
Φ3.94±0.0
079
0.512±0.00
06
0.827±0.07
79
CARTON SIZE(mm)
L
36
60
W
36
60
H
38
80
3/3
www.be
encent.com
m.cn
Specifications a subject to ch
S
are
hange without n
notice.
Customers should verify actua device perfor
al
rmance in their specific applications
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