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Selecting a SiBOD Device
1. When selecting a device, it is important
that the VRM of the device be equal to or
greater than the operating voltage of the
system. For example, when protecting
the ringing circuit of a telephone handset,
SiBOD VRM > VDC + RINGING VOLTAGE
SiBOD VRM > VDC + V
√2XRINGINGVOLTAGE
2. The minimum holding current (IH) of the
device must be carefully selected if the
SiBOD is to reset after diverting a surge.
The minimum IH value of the SiBOD must
be greater than the current the system is
capable of delivering, otherwise the
device will remain conducting following
a transient condition.
To Order: 1-877-502-5500 Fax: 1-858-715-7280
3
Thyristors (SiBOD Breakover Devices)
SiBOD
Series
Application Notes
VOLTAGE
VOLTS
800
1500
1000
1500
600
1000
2500
1000
1500
1000
1500
4000
1500
1000
2000
Level 3
Level 4
2000
WAVEFORM
SEC
10x560
10x160
9x720
10x1000
10x360
10x1000
2x10
10x360
10x700
.5x700
10x700
1.2x50
10x700
1.2x50
10x700
CURRENT
AMPS
100
200
25
37.5
100
500
25
37.5
25/100
37.5
100
38
25
50
100
50
WAVEFORM
SEC
10x560
10x160
5x320
10x1000
10x360
10x1000
2x10
10x360
5x310
.2x310
.8x310
5x310
1x20
5x310
8x20
5x310
IH>
SYSTEM VOLTAGE
SOURCE IMPEDANCE
The SiBOD range can be used to protect against surges
as defined in the following International Standards
Standard
FCC Part 68
Surge A Metallic
Surge A Longitudinal
Surge B Metallic
Surge B Longitudinal
Bellcore GR 1089
1
2
3
4
5
ITU K.17
ITU K.20
ITU K.21
RLM 88, CNET
CNET 131-24
VDE 0433
VDE 0878
IEC 61000-4-5
FTZ R12
SIBOD
SERIES
B or C
C
A, B or C
C
B or C
C
A, B or C
B or C
A, B or C