2322661 Datasheet, PDF (1/4 Pages) Vishay Siliconix – PTC Thermistors, Overload Protection For Telecommunication

2322 66. 9....
Vishay BCcomponents
PTC Thermistors, Overload Protection
For Telecommunication
PRIMARY
PROTECTION
(OPTIONAL)
+θ
subscriber
lines
PTC
+θ
MDF
SECONDARY
PROTECTION
+θ
PTC
voltage
clamp
+θ
PTC
SUBSCRIBER
LOOP
INTERFACE
CIRCUIT
(SLIC)
OR
TRANSFORMER
CCB913
Typical telephone line showing where PTC thermistors
can be used for overcurrent protection.
DESCRIPTION
Advanced developments in telephony 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.
FEATURES
• Wide resistance range in telecom area 4... 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
• Good tracking over a wide temperature range for all
matched or binned types
• UL1434 approved types available (XGPU2)
• Excellent stability over extended time
• All telecom PTCs are coated with a high temperature
silicon lacquer (UL94V0) to protect them from any harsh
environments and to improve their lifetime.
APPLICATIONS
• 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
V
MAX.
(V)
NON-TRIP
CURRENT
I_nt at T
(mA) (°C)
RESISTANCE
R₂₅ TOL
(Ω) (%)
MATCHED
PAIRS
TRIP
CURRENT
I_t at T
(mA) (°C)
MAX.
TRIP TIME
at 25 °C
t_t
at I_t
(s) (mA)
APPLICATION
AREA⁽¹⁾
COMPATIBILITY
220 70 70
230 100 70
245 60 70
245 75 70
245 70 70
245 65 85
245 140 55
245 140 55
250 100 40
250 70 70
250 100 70
285 135 95
300 100 70
350 100 70
350 100 70
600 50 70
600 70 70
600 70 70
600 70 70
600 175 25
600 175 25
25 ±20
10 ±20
70 +10/−15
33 ±20
25 ±15
25 ±20
16 ±20
10 ±20
20 +10/−20
25 ±20
10 ±20
8
±25
16 ±25
10 ±20
10 ±20
50 ±20
35 ±20
25 ±20
25 ±20
10 ±20
10 ±20
1Ω
1Ω
no
±5%
no
2%
no
no
1Ω
1Ω
no
0.5 Ω
no
no
1Ω
1Ω
3Ω
2%
2%
0.5 Ω
no
200 25 2.5 1000
C.O.
K20/21
250 25 3 1000 MDF; ISDN
K20/21
180 25 60 220
C.O.
−
150 10 1.2 1000
C.O.
−
200 25 20 400
C.O.
K20/21; FTCSE I31-24
200 25 3.40 650
C.O.
K20/21
270 25 8 1000
T.E.
K20/21; FTCSE I31-21
270 25 8 1000
T.E.
K20/21; FTCSE I31-21
220 25 1 1 000
MDF
−
175 25 1.3 1 000 MDF; C.O.
K20/21
450 0 0.30 8 000
T.E.
K20/21
400 25 6 1000 MDF; ISDN
K20/21
250 25 2.0 1000 MDF; T.E.
K20/21
270 25 4.0 1000 T.E.; S.B.
K20/21
270 25 4.0 1000
C.O.
K20/21
140 25 1 1000
C.O.
K20/21
600 0
3 1000
C.O.
K20/21
170 25 4 700
C.O.
K20/21
170 25 8 700
C.O.
K20/21
400 25 7 1000
C.O.
UL1459/GR1089
400 25 7 1000 T.E.; S.B.
UL1459/GR1089
Notes
1. MDF: Main Distribution Frame; C.O.: Central Office Switching; T.E.: Subscriber Terminal Equipment; S.B.: Set-top Box.
2. UL 1434 approved types.
CATALOG
NUMBER
2322 ... .....
661 93048
661 93147
661 93025
661 93037
661 93175
661 93142
662 93081
662 93074
661 93118
661 93148
663 93025
661 93078
661 93121
661 93124
661 93146
661 93135
661 93056
661 93139
662 93129
662 93114⁽²⁾
662 93131⁽²⁾
Document Number: 29070
Revision: 10-Oct-03
For technical questions contact: [e-mail]
www.vishay.com
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