Littelfuse CR0640SB The cr range of protectors are based on the proven technology of the t10 thyristor product Datasheet

CRxxxx series
devices is dissipated power (V x I).
Description
The CR range of protectors are based on the proven
technology of the T10 thyristor product. Designed for
transient voltage protection of telecommunications
equipment, it provides higher power handling than a
conventional avalanche diode (TVS) and when compared to
a GDT offers lower voltage clamping levels and infinite surge
life.
Packaged in a transfer molded DO-214AA surface mount
outline designed for high speed pick & place machines used
in today’s surface mount assembly lines.
Electrical Charecteristics
The electrical characteristics of a CRXXXX device is similar
to that of a self gated Triac, but the CR is a two terminal
device with no gate. The gate function is achieved by an
internal current controlled mechanism.
Like the T.T.S. diodes, the CRXXXX has a standoff voltage
(Vrm) which should be equal to or greater than the operating
voltage of the system to be protected. At this voltage (Vrm)
the current consumption of the CRXXXX is negligible and will
not effect the protected system.
Resetting of the device to the non conducting state is
controlled by the current flowing through the device. When
the current falls below a certain value, known as the Holding
Current (Ih), the device resets automatically.
As with the avalanche T.V.S. device, if the CRXXXX is
subjected to a surge current which is beyond its maximum
rating, then the device will fail in short circuit mode, this
ensures that the equipment is ultimately protected.
Selecting A CRXXXX
1. When selecting a CRXXXX device, it is important that the
Vrm of the device is equal to or greater than the operating
voltage of the system.
2. The minimum Holding Current (Ih) must be greater than
the current the system is capable of delivering otherwise the
device will remain conducting following a transient condition.
IT
When a transient occurs, the voltage across the CRXXXX
will increase until the breakdown voltage (Vbr) is reached. At
this point the device will operate in a similar way to a T.V.S.
device and is in an avalanche mode.
The voltage of the transient will now be limited and will only
increase by a few volts as the device diverts more current.
As this transient current rises, a level of current through the
device is reached (Ibo) which causes the device to switch to
a fully conductive state such that the voltage across the
device is now only a few volts (Vt). The voltage at which the
device switches from the avalanche mode to the fully
conductive state (Vt) is known as the Breakover Voltage
(Vbo). When the device is in the Vt state, high currents can
be deverted without damage to the CRXXXX due to the low
voltage across the device, since the limiting factor in such
IH
VT
IBO
IRM
VRM
VBR
VBO
MIN
V-I Graph
Illustrating Symbols
and Terms for
the CR Surge
Protection Device.
The CRXXXX Range Can Be Used to Protect Against Surges As Defined In The Following International Standards.
52
SA
SB
SC
FCC Rules Part 68/D
Metallic
Longitudinal
10/560µs
10/160µs
50A
100A
100A
150A
100A
200A
Bellcore Specification
TR-NWT-001089
10/1000µs
2/10µs
100v/µs
37A
1KV
75A
1KV
100A
500A
1KV
ITU K-17 (Formerly CCITT)
Voltage Wave Form
Current Wave Form
100/700µs
5/310µs
-
1.5KV
38A
1.5KV
38A
VDE 0433
Voltage Wave Form
Current Wave Form
10/700µs
5/310µs
-
2KV
50A
4.0KV
100A
C-NET 131-24
Voltage Wave From
Current Wave Form
0.5/700µs
0.8/310µs
1.0KV
25A
1.0KV
25A
4.0KV
100A
IEC 1000-4-5
(Discharge through 2Ω impendance) I
Voltage Wave Form
8/20µs
1-2/50µs
-
100A
300V
250A
500V
ITU K-20
(Formerly CCITT)
Voltage Wave Form
Current Wave Form
10/700µs
5/310µs
1000V
25A
10000V
25A
4000V
100A
w w w. l i t t e l f u s e . c o m
CRxxxx series
Specifications
Electrical Charecteristics (Tj=25°C)
SYMBOL
VRM
VBR
VBO
VT
PARAMETER
Stand-off Coltage
Breakdown Voltage
Breakover Voltage
On-State Voltage
SYMBOL
IRM
IBO
IH
PARAMETER
Stand-off Current
Breakover Current
Holding Current
THERMAL DATA
T stg
Storage and Operating Junction Temperature range
Tj
TL
Maximum Temperature For Soldering
(For period of 10 seconds max)
Stock
Number
MAXIMUM RATINGS
SUFFIX
SA
Ipp 10x160µs Amps
Ipp 10x560µs Amps
ITSM 60Hz Amps
DI/dt Amps/µs
100
50
20
500
MAXIMUM RATINGS
SUFFIX
SB
Ipp 10x160µs Amps
Ipp 10x560µs Amps
ITSM 60Hz Amps
DI/dt Amps/µs
150
100
30
500
MAXIMUM RATINGS
SUFFIX
SC
Ipp 2x10µs Amps
Ipp 10x160µs Amps
Ipp 10x560µs Amps
ITSM 60Hz Amps
dI/dt Amps/µs
500
200
100
60
500
VALUE
-40 to +150
150
230
UNIT
°C
°C
°C
Device
Code
Reverse
Stand-off
Voltage
Maximum
Reverse
Leakage
µA
Maximum
Breakover
Voltage
@Ibo
Maximum
Breakover
Current
mA
Minimum
Holding
Current
mA
Maximum
On-State
Voltage
@1A
Typical
Capacitance
@1MHz 2v bias
pF
CR
CR
CR
CR
CR
CR
CR
CR
0300
0640
0720
0800
1100
1300
1500
1800
SA
SA
SA
SA
SA
SA
SA
SA
030A
064A
072A
080A
110A
130A
150A
180A
25
58
65
75
90
120
140
160
5
5
5
5
5
5
5
5
40
77
88
98
130
160
180
220
800
800
800
800
800
800
800
800
150
150
150
150
150
150
150
150
5
5
5
5
5
5
5
5
100
60
60
60
60
40
40
40
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
2300
2600
3100
3500
0300
0640
0720
0800
1100
1300
1500
1800
2300
2600
3100
3500
SA
SA
SA
SA
SB
SB
SB
SB
SB
SB
SB
SB
SB
SB
SB
SB
230A
260A
310A
350A
030B
064B
072B
080B
110B
130B
150B
180B
230B
260B
310B
350B
190
220
275
320
25
58
65
75
90
120
140
160
190
220
275
320
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
260
300
350
400
40
77
88
98
130
160
180
220
260
300
350
400
800
800
800
800
800
800
800
800
800
800
800
800
800
800
800
800
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
30
30
30
30
100
60
60
60
60
40
40
40
30
30
30
30
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR
0300
0640
0720
0800
1100
1300
1500
1800
2300
2600
3100
3500
SC
SC
SC
SC
SC
SC
SC
SC
SC
SC
SC
SC
030C
064C
072C
080C
110C
130C
150C
180C
230C
260C
310C
350C
25
58
65
75
90
120
140
160
190
220
275
320
5
5
5
5
5
5
5
5
5
5
5
5
40
77
88
98
130
160
180
220
260
300
350
400
800
800
800
800
800
800
800
800
800
800
800
800
150
150
150
150
150
150
150
150
150
150
150
150
5
5
5
5
5
5
5
5
5
5
5
5
200
120
120
120
120
80
80
80
60
60
60
60
w w w. l i t t e l f u s e . c o m
53
CRxxxx series
°
CRXXXXSB
CRXXXXSC
CRXXXXSA
°
IPP - Percentage peak current - %IPP
PULSE WAVE FORM (10/10000µS)
tr
100
t2
90
tr = 1.25 x (t2 - t1) =10µs
td = 1000µs
50
10
t1
1
°
2
3
4
t - Time - m S e c
Peak Current Surge (Non-Repetitive)
On-State Current (RMS) - Amps
PEAK SURGE ON-STATE CURRENT
VS. SURGE CURRENT DURATION
100
80
60
50
40
30
CRXXXXSB
CRXXXXSC
20
10
8
6
5
4
3
CRXXXXSA
2
1
1
2
3 4 5
10
20 30 40 50
100
200 300
1000
Surge Current Duration - full cycles @ 60HZ SINUSOIDAL
Peak Value - Ipp
10x560µs PULSE WAVE FORM
TEST WAVEFORM
PARAMETER
tr = 10 sec
td = 160 sec
Half Value =
Ipp t
= d
2
10x160 Waveform
0
80
160 240
320 400
Ipp - Peak Pulse Current - %Ipp
Ipp - Peak Pulse Current - %Ipp
10x160µs PULSE WAVE FORM
480
Half Value =
560
840 1,120 1,400 1,680
t - Time - Sec
w w w. l i t t e l f u s e . c o m
Ipp t
= d
2
10x560 Waveform
0 280
t - Time - Sec
54
Peak Value - Ipp
TEST WAVEFORM
PARAMETER
tr = 10 sec
td = 560 sec
Similar pages