2381 66. 9..../PTCTL..R.....E
Vishay BCcomponents
PTC Thermistors, Overload Protection
For Telecommunication
FEATURES
PRIMARY
PROTECTION
(OPTIONAL)
+θ
PTC
subscriber
lines
+θ
SECONDARY
PROTECTION
+θ
PTC
voltage
clamp
+θ
PTC
MDF
SUBSCRIBER
LOOP
INTERFACE
CIRCUIT
(SLIC)
OR
TRANSFORMER
Typical telephone line showing where PTC thermistors
can be used for overcurrent protection.
•
Wide resistance range in telecom area from 4
Ω
to 70
Ω
•
Fast protection against power contact faults
•
Withstand high overload currents of up to 10 A
•
High voltage withstanding capabilities for the
larger sized thermistors (up to 600 V)
•
Good tracking over a wide temperature range for
all matched or binned thermistors (matching at
85 °C
≤
2 x matching at 25 °C)
•
UL1434 approved types available (XGPU2)
•
All telecom PTCs are coated with a high temperature
silicon lacquer (UL 94 V-0) to protect them from any harsh
environments and to improve their lifetime
•
Compliant to RoHS directive 2002/95/EC and in
accordance to WEEE 2002/96/EC
DESCRIPTION
Advanced developments in telephone equipment in recent
years have radically altered the protection requirements for
both exchange and subscriber equipment. The Vishay
BCcomponents range of Positive Temperature Coefficient
(PTC) thermistors includes devices specially designed to
provide overcurrent protection in specific telecom
applications.
APPLICATIONS
Over-temperature/over-load protection:
•
Main Distribution Frame (MDF)
•
Central Office Switching (C.O.)
•
Subscriber Terminal Equipment (T.E.)
•
Set-top box (S.B.)
MARKING
Clear marking on a grey coated body
BC and R25 value
ELECTRICAL DATA AND ORDERING INFORMATION
MAX.
I
NON-TRIP
TRIP
TRIP
MAX.
RESISTANCE
at
CATALOG NUMBER
MATCHING V
MAX.
CURRENT CURRENT TIME
APPLICATION
V
MAX.
at 1 A
(Ω)
AREA
(4)
(V
RMS
)
R
25
TOL.
Int at T
I
t
at T t
MAX.
I
MAX.
12NC
SAP CODING
(Ω)
(%)
(mA) (°C) (mA) (°C) (s)
(A)
25
± 20
1.0
220
70 70 200 25
2.5
4.0
C.O.
2381 661 93048
(1)
PTCTL4MR250GTE
(1)
(1)
10
± 20
1.0
230 100 70 250 25
3.0
2.0
MDF; ISDN
2381 661 93147
PTCTL3MR100GTE
(1)
33
± 20
1.5
245
75 70 150 10
1.2
1.0
C.O.
2381 661 93037
PTCTL3MR330GTE
(1) (3)
PTCTL4NR250GTE
(1) (3)
25
± 15
no
245
70 70 200 25
5.0
2.6
C.O.
2381 661 93175
(1) (3)
16
± 20
no
245 140 55 270 25
8.0
1.6
T.E.
2381 662 93081
PTCTL6NR160GTE
(1) (3)
10
± 20
no
245 140 55 270 25
8.0
2.0
T.E.
2381 662 93074
(1) (3)
PTCTL6NR100GTE
(1) (3)
25
± 20
1.0
250
70 70 175 25
1.3
3.2
MDF; C.O.
2381 661 93148
(1)
PTCTL3MR250HTE
(1)
10
± 20
no
250 100 70 450
0
40.0 10.0
T.E.
2381 663 93025
(1)
PTCTL8NR100HBE
(1)
(1)
8
± 25
0.5
285 135 95 400 25
6.0
0.6
MDF; ISDN
2381 661 93078
PTCTL4MR080JBE
(1)
16
± 25
no
300 100 70 250 25
2.0
2.6
MDF; T.E.
2381 661 93121
(1)
PTCTL3NR160KTE
(1)
(1)
10
± 20
no
350 100 70 270 25
4.0
1.0
T.E.; S.B.
2381 661 93124
PTCTL4NR100LBE
(1)
(1)
10
± 20
1.0
350 100 70 270 25
4.0
1.0
C.O.
2381 661 93146
PTCTL4MR100LTE
(1)
50
± 20
1.0
600
50 70 140 25
1.0
1.0
C.O.
2381 661 93135
(1)
PTCTL4MR500SBE
(1)
(1)
35
± 20
3.0
600
70 70 600
0
3.0
1.0
C.O.
2381 661 93056
PTCTL4MR350STE
(1)
25
± 20
0.5
600
70 70 170 25
2.5
2.0
C.O.
2381 661 93139
(1)
PTCTL4MR250STE
(1)
(1)
25
± 20
0.5
600
70 70 170 25
5.0
2.0
C.O.
2381 662 93129
PTCTL6MR250STE
(1)
10
± 20
0.5
600 175 25 400 25
7.0
1.0
C.O.
2381 662 93114
(2)
PTCTL7MR100SBE
(2)
(2)
10
± 20
no
600 175 25 400 25
7.0
1.0
T.E.; S.B.
2381 662 93131
PTCTL7NR100SBE
(2)
Notes
(1)
These types pass ITU-T K20-21-45 edition 2003 telecommunication protection recommendation
(2)
UL 1434 approved types and compatible with UL1459 and GR1089
(3)
These types are compatible with FTCSE 131
(4)
MDF: Main Distribution Frame; C.O.: Central Office Switching; T.E.: Subscriber Terminal Equipment; S.B.: Set-top Box
www.vishay.com
34
For technical questions, contact:
nlr@vishay.com
Document Number: 29070
Revision: 25-Jun-09
2381 66. 9..../PTCTL..R.....E
PTC Thermistors, Overload Protection
For Telecommunication
OVERCURRENT PROTECTION OF TELECOMMUNICATION LINES
The PTC thermistor must protect the telephone line circuit
against overcurrent which may be caused by the following
examples:
•
Surges due to lightning strikes on or near to the line plant.
•
Short-term induction of alternating voltages from adjacent
power lines or railway systems, usually caused when these
lines or systems develop faults.
•
Direct contact between telephone lines and power lines.
To provide good protection under such conditions a PTC
thermistor is connected in series with each line, usually as
secondary protection; see Typical Telephone Line drawing
on page 1. However, even with primary line protection
(usually a gas discharge tube), the PTC thermistor must fulfil
severe requirements.
Surge pulses of up to 2 kV can occur and in order to
withstand short-term power induction the PTC thermistor
must withstand high voltages. If the line has primary
protection a 220 V to 300 V PTC thermistor is adequate.
Without primary protection, however, a 600 V PTC device is
necessary. Vishay BCcomponents manufacturers a range of
PTC thermistors (see Electrical Data and Ordering
Information Table) covering both requirements.
In the case of direct contact between the telephone line and
a power line, the PTC thermistor must withstand very high
inrush power at normal mains voltage. Under such
conditions, overload currents of up to 10 A on a 230 V mains
could occur for up to several hours. To handle this power, the
resistance/temperature characteristic of the thermistor must
have a very steep slope and the ceramic must be extremely
homogeneous.
In case of overcurrent due to short-term induction of
alternating voltages, currents of several AMPs with voltages
as high as 650 V
RMS
can be present for several seconds
For standard high voltage applications, resistance values
from 25
Ω
to 50
Ω
are available. However, ISDN networks
which carry high-frequency sound and vision, need lower line
impedance.
Telecommunication designers are therefore demanding high
voltage thermistors with much lower R
25
values, which
places even greater demands on the manufacture of PTC
thermistors. For these applications PTC thermistors which
have a R
25
value of 10
Ω
with voltages in the 300 V
RMS
to
600 V
RMS
range are available.
In a typical telephone line application, two PTC thermistors
are used, one each for the tip and ring (or A and B) wire
together with their series resistors. For good line balance it is
important that the thermistor and resistor pairs are matched.
On request, Vishay BCcomponents can supply matched or
binned PTC thermistors with R
25
values matched to as close
as 0.5
Ω.
Vishay BCcomponents
PTC THERMISTORS IN BULK
D
T
H
3
H
2
F
L
1
d
COMPONENT DIMENSIONS
D
MAX.
(mm)
8.5
7.0
7.0
8.3
11
11
7.0
13.6
8.3
7.0
T
MAX.
(mm)
5.0
4.0
5.0
4.0
4.5
4.5
4.0
6.0
5.0
4.0
H
2
(mm)
1.5 to 3.0
2.0 ± 0.5
1.5 to 3
1.5 to 3.0
4.0 ± 1.0
4.0 ± 1.0
2.0 ± 0.5
4.0 ± 1.0
1.5 ± 0.5
2.5 ± 0.5
L
1
(mm)
-
-
-
-
-
-
-
20 ± 4.0
20 ± 3.0
-
H
3
MAX.
(mm)
11.5
9.8
10.0
11.0
15.5
15.5
9.8
18.6
10.3
10.0
H
0
(mm)
16
18
16
18
16
16
18
-
-
16
PACKAGING
(1) (2)
TYPE
Taped on reel
Taped on reel
Taped on reel
Taped on reel
Taped on reel
Taped on reel
Taped on reel
Bulk
Bulk
Taped on reel
SPQ
1500
1500
1500
1500
1500
1500
1500
200
250
1500
12NC
2381 661 93048
2381 661 93147
2381 661 93037
2381 661 93175
(3)
2381 662 93081
2381 662 93074
(3)
2381 661 93148
2381 663 93025
(3)
2381 661 93078
2381 661 93121
CATALOG NUMBER
SAP CODING
PTCTL4MR250GTE
PTCTL3MR100GTE
PTCTL3MR330GTE
PTCTL4NR250GTE
(3)
PTCTL6NR160GTE
PTCTL6NR100GTE
(3)
PTCTL3MR250HTE
PTCTL8NR100HBE
(3)
PTCTL4MR080JBE
PTCTL3NR160KTE
www.vishay.com
35
Document Number: 29070
Revision: 25-Jun-09
For technical questions, contact:
nlr@vishay.com
2381 66. 9..../PTCTL..R.....E
Vishay BCcomponents
COMPONENT DIMENSIONS
D
MAX.
(mm)
8.5
8.5
8.5
8.0
8.5
10.5
13
13
T
MAX.
(mm)
4.0
4.0
4.0
5.0
4.0
5.0
5.5
5.5
H
2
(mm)
2.5 ± 0.5
2.5 ± 0.5
2.5 ± 0.5
2.5 ± 0.5
2.0 ± 0.5
2.0 ± 0.5
4.0 ± 1.0
4.0 ± 1.0
L
1
(mm)
4.1 ± 0.5
-
4.1 ± 0.5
-
-
-
20 min.
20 min.
H
3
MAX.
(mm)
11.5
11.5
11.5
11.0
11.0
12.6
18.0
18.0
H
0
(mm)
-
16
-
16
16
16
-
-
PACKAGING
(1) (2)
TYPE
Bulk
Taped on reel
Bulk
Taped on reel
Taped on reel
Taped on reel
Bulk
Bulk
SPQ
500
1500
500
1500
1500
1500
200
200
12NC
2381 661 93124
2381 661 93146
2381 661 93135
2381 661 93056
2381 661 93139
2381 662 93129
2381 662 93114
2381 662 93131
CATALOG NUMBER
SAP CODING
PTCTL4NR100LBE
PTCTL4MR100LTE
PTCTL4MR500SBE
PTCTL4MR350STE
PTCTL4MR250STE
PTCTL6MR250STE
PTCTL7MR100SBE
PTCTL7NR100SBE
PTC Thermistors, Overload Protection
For Telecommunication
Notes
(1)
Taped in accordance with “IEC
60286-2”
(2)
Naked disc ceramic for substrate mounting, available on request
(3)
Insulated version is also available
PTC THERMISTORS TAPE ON REEL ACCORDING IEC 60286-2
P
D
P
P
h
T
h
H
3
d
W
2
L
W
0
W
1
W
H
0
H
1
H
2
P
0
P
1
F
D
0
T
1
t
Dimensions of the reel
TAPE AND REEL ACCORDING TO IEC60286-2 DIMENSIONS
in millimeters
SYMBOL
d
P
F
H2
H
0
PARAMETER
Lead diameter
Pitch between thermistors
Lead to lead distance
Component body to seating plane
Lead-wire clinch height
DIMENSIONS
0.6
12.7
5
4
See table
TOLERANCE
± 10 %
±1
+ 0.6 to - 0.1
±1
± 0.5
Guaranteed between component and tape
REMARKS
www.vishay.com
36
For technical questions, contact:
nlr@vishay.com
Document Number: 29070
Revision: 25-Jun-09
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
www.vishay.com
1
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