PTC thermistors for overcurrent
protection in telecom applications
Single SMDs
Series/Type:
Date:
B5908*
March 2010
© EPCOS AG 2010. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Overcurrent protection for telecom
Single SMDs
Applications
Overcurrent protection for telecom applications
Suitable for line card applications e.g. POTS, access networks, customer premises
equipment (CPE) or integrated voice data (IVD)
Features
Compliant with ITU-T standards
basic-level lightning surges (10/700 µs)
basic-level power induction (600 V, 1 A, 0.2 s)
power contact criteria A/B (230 V, 15 min.)
Suitable for continuous connection to mains voltages of 110/230 V AC
in tripped (high-ohmic) condition
UL approval for Gamma I version to UL 1434 (file number E69802)
Matching available with narrow resistance tolerance
Tight resistance matching maintained after switching
Negligible resistance drift after reflow soldering or switching
Marked with type designation and date code
RoHS-compatible
Options
Alternative tolerances and resistances on request
Delivery mode
Blister tape, 330-mm reel with 16-mm (Gamma I), taping to IEC 60286-3
General technical data
Max. operating voltage
Operating temperature range
Operating temperature range
V
max
T
op
T
op
245
20/+125
0/+70
V AC
°C
°C
(V = 0)
(V = 230 V)
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 11
Overcurrent protection for telecom
Single SMDs
Electrical specifications and ordering codes
Type
R
R
∆R
R
R
25,match
(per packing unit)
R
1
R
2 max
Ω
0.5
1.0
0.5
1.0
1.0
1.0
I
R
@
25°C
mA
180
180
150
130
125
90
I
R
@
70°C
mA
120
120
100
85
80
60
I
S
I
Smax
Ordering code
@
@ 230 V AC
25°C
mA
A
400
400
300
270
260
190
1.0
1.0
1.5
2.8
2.8
2.5
B59081G1120A161
B59085G1120A161
B59083G1120A161
B59080G1120B262
B59086G1120B262
B59084G1120A161
Ω
Gamma I
G1081 9
G1085 10
G1083 16
G1080 25
G1086 29
G1084 50
%
±20
±20
±20
±20
±20
±15
Switching times and ordering codes
Type
R
R
t
S
(typ.)
@ I
Smax,
230 V AC
s
4.4
3.9
1.0
0.2
0.18
0.13
t
S
(typ.)
@ 1 A,
230 V AC
s
4.4
3.9
2.4
1.5
1.3
0.8
t
S
(typ.)
@ 500 mA,
230 V AC
s
23.0
19.0
11.0
6.5
5.5
3.1
Ordering code
Ω
Gamma I
G1081
9
G1085 10
G1083 16
G1080 25
G1086 29
G1084 50
B59081G1120A161
B59085G1120A161
B59083G1120A161
B59080G1120B262
B59086G1120B262
B59084G1120A161
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 11
Overcurrent protection for telecom
Single SMDs
Reliability data
Test
Electrical endurance,
cycling
Electrical endurance,
constant
Damp heat
Standard
IEC 60738-1
IEC 60738-1
IEC 60738-1
Test conditions
Room temperature, I
Smax
; V
max
Number of cycles: 10
Storage at V
max
/T
op,max
(V
max
)
Test duration: 1000 h
Temperature of air: 40
°C
Relative humidity of air: 93%
Duration: 56 days
Test according to IEC 60068-2-78
T
1
= T
op,min
(0 V), T
2
= T
op,max
(0 V)
Number of cycles: 5
Test duration: 30 min
Test according to IEC 60068-2-14, Test Na
Frequency range: 10 to 55 Hz
Displacement amplitude: 0.75 mm
Test duration: 3
×
2 h
Test according to IEC 60068-2-6, Test Fc
Acceleration: 390 m/s
2
Pulse duration: 6 ms; 6
×
4000 pulses
Dry heat: T = T
op,max
(0 V)
Test duration: 16 h
Damp heat first cycle
Cold: T = T
op,min
(0 V)
Test duration: 2 h
Damp heat 5 cycles
Tests performed according to
IEC 60068-2-30
∆R
25
/R
25
< 20%
< 25%
< 10%
Rapid change
of temperature
IEC 60738-1
< 10%
Vibration
IEC 60738-1
< 5%
Shock
Climatic sequence
IEC 60738-1
IEC 60738-1
< 5%
< 10%
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 11
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