PolySwitch devices for telecommunication and networking
applications were initially designed over ten years ago to meet
the growing demand for resettable overcurrent protection. These
product families help provide protection against power cross
and power induction surge as defined in ITU, Telcordia, and
UL. Available in chip, surface-mount, and radial-leaded
configurations, PolySwitch devices help improve the reliability
of customer premise and network equipment world wide.
Benefits
• Many product choices give engineers more design
flexibility
• Compatible with high volume electronics assembly
• Assist in meeting regulatory requirements
• Improved line balance
• Applicable for legacy POTS and modern digital
communications equipment
Features
• RoHS compliant
• Resettable overcurrent protection
• Surface-mount, radial-leaded, and chip form factors
• Fast time-to-trip
• Agency recognition: UL, CSA, TÜV
• Resistance sorted and matched devices available
• Low parasitic capacitance/flat impedance with
frequency
13
Telecommunications and Networking Devices
1 67
Target Applications
• Modems
• Phone sets
• Fax machines
• Phone wall outlets
• Alarm systems
• PBX systems
• MDF modules
• Analog and digital line cards
• T1/E1 equipment
• xDSL modems and splitters
• Powered ethernet systems
• VoIP (Voice over IP equipment)
• LAN, WAN equipment
• Customer premise equipment
• Access network hardware
PolySwitch Resettable Devices
Protection Application Guide for Telecommunications and Networking Devices*
To use this guide, follow the steps below:
1. Select your equipment type from the guide below.
2. Select the type of protection depending on the agency and regional specifications in the second column.
3. Select the form factor for your application.
4. Use the Agency Specification/ PolySwitch Device Selection Guide on the next page to select a specific part number for each application based
on the agency requirements.
5. Parts with fast time-to-trip or low resistance are available. Please consult your Raychem Circuit Protection representative.
Overcurrent Protection
Region/
Application
Customer Premises equipment
IT equipment
Analog modems, V.90 modems,
ISDN modems, xDSL modems,
ADSL splitters, phone sets, fax machines,
answering machines, caller ID, internet
appliances, PBX systems, POS terminals,
wall plugs
Access network equipment (
†
)
Remote terminals, line repeaters,
multiplexers, cross-connects,
WAN equipment
Europe/Asia/
South America
ITU K.45
Central office switching equipment (
†
)
Analog/POTS linecards, ISDN linecards,
xDSL modems, ADSL/VDSL splitters,
T1/E1 linecards, multiplexers,
CSU/DSU, servers
Europe/Asia/
South America
ITU K.20
Primary protection modules (
†
)
MDF modules, Network Interface
Devices (NID)
North America
Telcordia GR-974
Europe/Asia/
South America
ITU K.20
Short-haul/intrabuilding communications
equipment (
†
)
LAN equipment, VoIP cards, cable
telephony NIUs, wireless local loop
handsets
LAN intrabuilding power cross protection
LAN equipment, VoIP cards, IP phones
IEEE 802.3 Power over LAN protection
Powered ethernet switches and terminals,
IP phones, wireless LAN base stations,
microcellular base stations, VoIP cards
Cable telephony powering system
Power passing taps
BBRF550
BBRF750
N/A
SMD050-2018F
North America
Telcordia GR-1089
intrabuilding
Europe/Asia/
South America
ITU K.21
TRF250-120T
TRF250-145T
TRF250-145
TRF250-120
TRF250-145
TRF250-120T
TRF250-120
TRF250-145
TRF250-180
TSL250-080F
TVBxxxSA-L
TVAxxxSA-L
N/A
TS250-130F
TSL250-080F
TSV250-130F
TS250-130F
TSV250-130F
TVBxxxSA-L
TVAxxxSA-L
TVBxxxSA-L
TVAxxxSA-L
TS250-130F
TSV250-130F
TCF250-120T
TVBxxxSx-L
TRF250-120
TRF250-145
TRF250-120T
TRF250-180
TRF250-180
N/A
North America
Telcordia GR-1089
TRF250-120
TRF250-145
TRF250-120T
TRF250-180
TRF600-160
TSM600-250F
TSM600-170F
TSM600-200F
FT600-1250**
TSM600-400F
††
TS250-130F
TSV250-130F
TVBxxxSA-L
TVAxxxSA-L
TVBxxxSC-L
North America
Telcordia GR-1089
Specification
North America
TIA-968-A (formerly
FCC Part 68),
UL 60950
Europe/Asia/
South America
ITU K.21
TRF250-120
TRF250-120T
TRF250-145
TRF250-180
TRF600-160
TS600-170F
TS600-200F
TSM600-250F
FT600-1250**
TSM600-400F
††
TS250-130F
TSV250-130F
TVBxxxSA-L
TVAxxxSA-L
TVBxxxSC-L
TRF250-130F
TSV-130F
TVBxxxSA-L
TVAxxxSA-L
Form Factor
Radial-leaded
TRF600-150
Surface-mount
TS600-170F
TS600-200F
Chip
SiBar Thyristor
Surge Protectors
‡
TVBxxxSA-L,
TVBxxxSB-L, or
TVAxxxSA-L
13
Telecommunications and Networking Devices
Notes:
*
This list is not exhaustive. Raychem Circuit Protection welcomes our customers’ input for additional application ideas for PolySwitch resettable devices.
†
For improved line balance in these applications, resistance-matched parts are recommended.
‡
For more information on Raychem Circuit Protection SiBar thyristor surge protectors, refer to the SiBar product section on page 33.
**
FT600-1250 are surface mount Telecom fuse devices. FT600-0500 and FT600-2000 reference also available. See FT600 section on page 85.
††
Helps meet GR-1089 issue 3
168
Agency Specification/PolySwitch Selection Guide for Telecommunications and Networking Devices
Use the guide below to select the PolySwitch devices which are typically used in your application. The following pages contain the specifications for the
part numbers recommended below. PolySwitch devices assist telecommunication equipment in meeting the applicable protection requirements of these
industry specifications. Refer to individual agency specifications for test procedures and circuit schematics. Users should independently evaluate the
suitability of, and test each product for their application.
Family
TCF250
Product*
TCF250-145T
TCF250-180
TCF250-120T
TRF250
TRF250-080U
ITU K.20 – 1.0kV 10/700μs
ITU K.20 – 230V
AC
, 10
Ω
ITU K.20 – 600V
AC
, 600
Ω
TRF250-110U
TRF250-120
TRF250-120T
TRF250-120U
TRF250-120UT
TRF250-145
TRF250-145U
TRF250-180
TRF250-180US
TSV250
TS250
TSL250
TSV250-130F
TS250-130F
TSL250-080F
ITU K.20/21/45 – 1.5kV 10/700μs
ITU K.20/21/45 – 4.0kV 10/700μs
†
Telcordia GR-1089 Intrabuilding – Surge 1 & 2
ITU K.20/21/45 – 230V
AC
, 10
Ω
ITU K.20/21/45 – 600V
AC
, 600
Ω
Telcordia GR-1089 Intrabuilding – 120V
AC
, 25A
ITU K.20/21/45 – 230V
AC
, 10
Ω
TR600
TRF600-150
TRF600-160
TS600
TS600-170F
TS600-200F-RA
TSM600
TSM600-250F
TSM600-250F-RA
TSM600-400F
TIA-968-A (formerly FCC Part 68)
Telcordia GR-1089 – Level 1 and 2, issue 2
‡
TIA-968-A (formerly FCC Part 68)
Telcordia GR-1089 – Level 1 and 2, issue 2
‡
TIA-968-A (formerly FCC Part 68)
Telcordia GR-1089 – Level 1 and 2, issue 2
‡
TIA-968-A (formerly FCC Part 68)
Telcordia GR-1089, issue 3
FT600
**
FT600-0500
FT600-1250
FT600-2000
Notes: *
†
‡
**
Lightning
ITU K.20/21/45 – 4.0kV 10/700μs
†
Power Cross
ITU K.20/21/45 – 230V
AC
, 10
Ω
ITU K.20/21/45 – 600V
AC
, 600
Ω
ITU K.20/21/45 – 1.5kV 10/700μs
ITU K.20/21/45 – 4.0kV 10/700μs
†
ITU K.20/21/45 – 230V
AC
, 10
Ω
ITU K.20/21/45 – 600V
AC
, 600
Ω
UL60950, 3rd Ed. – 600V
AC
, 40A
Telcordia GR-1089 – 600V
AC
, 60A
UL60950, 3rd Ed. – 600V
AC
, 40A
Telcordia GR-1089 – 600V
AC
, 60A
UL60950, 3rd Ed. – 600V
AC
, 40A
Telcordia GR-1089 – 600V
AC
, 60A
UL60950, 3rd Ed. – 600V
AC
, 40A
Telcordia GR-1089 – 600V
AC
, 60A
UL60950, 600V
AC
, 40A
UL60950, 3rd Ed. – 600V
AC
, 40A
Telcordia GR-1089 – 600 V
AC
, 60A
13
Telecommunications and Networking Devices
169
TIA-968-A - Type A & B
TIA-968-A - Type A & B
Applies to all products which share the same prefix.
Tested with 230V gas discharge tube primary protector.
May require additional series resistor to help telecommunication equipment pass Surge 3 (1kV, 10/1000μs).
See telecom surface-mount fuse section page 85.
PolySwitch Resettable Devices
Table T1 - Product Series: Size, Current Rating, Voltage Rating, Typical Resistance for
Telecommunications and Networking Devices
TCF250
Voltage Rating (V)***
(Operating/Interrupt)
60/250
TRF250
60/250
TS250
60/250
TSV250
60/250
TSL250
80/250
Telcordia
GR-1089
Intrabuilding
8.0Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
TS600
TSM600
60/600
UL60950
Telcordia
GR-1089
—
—
—
—
—
—
—
—
—
11.0Ω
—
8.5Ω
3-3.5Ω
‡‡
—
—
—
—
TRF600
60/600
UL60950
Telcordia
GR-1089
—
—
—
—
—
—
—
8Ω
5.5-7.0Ω
‡‡
—
—
—
—
—
1.1Ω
††
—
—
BBRF
99
RXEF
60
72
††
SMD,midSMD
miniSMDC
60
Specification
Hold Current (A)
0.080
0.100
0.110
0.120
0.130
0.140
0.145
0.150
0.160
0.170
0.180
0.200
0.250
0.300
0.400
0.550
0.750
ITU
—
—
—
10.5Ω
—
—
7.0Ω
—
—
—
1.4Ω
—
—
—
—
—
—
ITU
17.0Ω
—
7.0Ω
6.0-9.5Ω
—
—
4.3-5.0Ω
—
—
—
1.5Ω
†††
—
—
—
—
—
—
ITU
—
—
—
—
8.0-10.5Ω
—
—
—
—
—
—
—
—
—
—
—
—
ITU
—
—
—
—
5.5Ω
—
—
—
—
—
—
—
—
—
—
—
—
Cable
Taps
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.05Ω
0.58Ω
—
3.5Ω
—
—
—
—
—
—
—
4.3Ω
—
2.3Ω
††
1.6Ω
††
—
—
—
—
—
—
—
—
—
4.0Ω
—
—
—
—
—
—
—
—
—
—
—
††
These devices have a maximum operating voltage of 72V
‡‡
These devices have a maximum operating voltage of 250V
*** Voltage Rating for Telecommunications and Networking Devices is dependent upon the nature of the fault conditions. See telecom fuses section on page 86.
†††
These devices have a maximum operating voltage of 100V
Voltage Ratings for Telecommunications and Networking Devices
For Raychem Circuit Protection telecommunications devices (TC, TGC, TCF, TRx, TSx series) there are two applicable voltage ratings. These are
V
max
Operating
and
V
max
Interrupt.
To help understand the nature of these two different voltage ratings the following definitions are provided:
max
Operating:
For telecommunications devices this is the voltage we have used to obtain component recognition under UL1434. Most Raychem Circuit P
rotection devices (TGC, TCF, TRFx, TSx) are certified at 60V but can withstand higher V
max
. TR600-160 and TSM600 product families are certified at 250V b
ut can withstand higher V
max
. Interrupt conditions as noted above.
Telecommunications and Networking Devices
Interrupt:
Under specified conditions this is the highest voltage that can be applied to the device at the maximum current. Devices have been designed t
o trip safely under higher power level cross conditions, as listed above, to assist equipment in meeting the appropriate industry conditions.
max
Table T2 - Thermal Derating for Telecommunications and Networking Devices
[Hold Current (A) at Ambient Temperature (°C)]
Maximun Ambient Temperature
-40˚C
-20˚C
0˚C
Part Number
Chip*—60/250V
TCF250
TCF250-120T
TCF250-145T
TCF250-180**
Radial-leaded*—60/250V
TRF250
TRF250-080U
TRF250-110U
TRF250-120
TRF250-145
TRF250-180**
TRF250-180US
Surface
†
—80/250V
TSL250
TSL250-080F
20˚C
40˚C
50˚C
60˚C
70˚C
85˚C
0.186
0.225
0.269
0.165
0.199
0.240
0.143
0.172
0.211
0.120
0.145
0.180
0.099
0.119
0.153
0.088
0.106
0.138
0.077
0.093
0.123
0.066
0.080
0.109
0.050
0.060
0.087
0.124
0.171
0.186
0.225
0.279
0.279
0.110
0.151
0.165
0.199
0.247
0.247
0.095
0.131
0.143
0.172
0.213
0.213
0.080
0.110
0.120
0.145
0.180
0.180
0.066
0.091
0.099
0.119
0.147
0.147
0.059
0.081
0.088
0.106
0.131
0.131
0.051
0.071
0.077
0.093
0.115
0.115
0.044
0.061
0.066
0.080
0.099
0.099
0.033
0.046
0.050
0.060
0.074
0.074
13
0.124
0.110
0.095
0.080
0.066
0.059
0.051
0.044
0.033
* 60/250V products are designed to help equipment pass ITU specifications (K.20, K.21, etc) and Telcordia GR-1089 Intrabuilding power cross.
†
80/250V products are designed to help equipment pass Telcordia GR-1089 Intrabuilding power cross (120V /25A).
AC
** Product is not currently available in a resistance matched or sorted option.
170
Table T2 - Thermal Derating for Telecommunications and Networking Devices
[Hold Current (A) at Ambient Temperature (°C)]
Maximun Ambient Temperature
-40˚C
-20˚C
0˚C
Part Number
Surface
*
—60/250V
TS250/TSV250
TS250-130F
TSV250-130F
Radial-leaded
‡
—60/600V
TRF600
TRF600-150
TRF600-160
Surface
‡
—60/600V
TS600/TSM600
TS600-170F
TS600-200F-RA-B-0.5
TSM600-250F
TSM600-250F-RA
TSM600-400F
Radial-leaded—90V
BBRF**
BBRF550
BBRF750
Radial-leaded—60/72V
RXEF**
RXEF010
RXEF017
RXEF020
RXEF025
RXEF030
Surface—60V
SMD, midSMD**
SMD030F
SMD030F-2018
SMD050F-2018
Surface—60V
miniSMD**
miniSMDC014F
0.23
0.20
0.17
0.14
0.11
0.10
0.09
0.07
0.160
0.260
0.310
0.390
0.470
0.140
0.230
0.270
0.340
0.410
0.110
0.210
0.240
0.300
0.360
0.100
0.170
0.200
0.250
0.300
0.080
0.140
0.160
0.200
0.240
0.072
0.120
0.140
0.180
0.220
0.067
0.110
0.130
0.160
0.200
0.050
0.090
0.110
0.140
0.160
0.850
1.150
0.750
1.000
0.650
0.900
0.550
0.750
0.450
0.610
0.400
0.550
0.350
0.480
0.300
0.410
20˚C
40˚C
50˚C
60˚C
70˚C
...
Cont'd
85˚C
0.208
0.208
0.182
0.182
0.156
0.156
0.130
0.130
0.104
0.104
0.091
0.091
0.078
0.078
0.065
0.065
0.045
0.045
0.233
0.249
0.206
0.219
0.178
0.190
0.150
0.160
0.124
0.132
0.110
0.117
0.096
0.103
0.083
0.088
0.062
0.066
0.264
0.310
0.400
0.400
0.640
0.230
0.275
0.350
0.350
0.560
0.200
0.238
0.300
0.300
0.480
0.170
0.200
0.250
0.250
0.400
0.140
0.165
0.198
0.198
0.320
0.125
0.147
0.170
0.170
0.270
0.109
0.128
0.140
0.140
0.230
0.094
0.110
0.117
0.117
0.190
0.070
0.083
0.083
0.083
0.130
0.220
0.300
0.040
0.070
0.080
0.100
0.120
0.44
0.48
0.86
0.39
0.42
0.77
0.32
0.35
0.70
0.30
0.30
0.55
0.26
0.24
0.48
0.23
0.21
0.43
0.19
0.17
0.38
0.18
0.15
0.36
0.15
0.10
0.26
13
Telecommunications and Networking Devices
171
0.05
* 60/250V products are designed to help equipment pass ITU specifications (K.20, K.21, etc) and Telcordia GR-1089 Intrabuilding power cross.
†
80/250V products are designed to help equipment pass Telcordia GR-1089 Intrabuilding power cross (120V /25A).
AC
‡
60/600V products are designed to help equipment pass UL60950, TIA-968-A (formerly FCC Part 68) and GR1089 specifications.
** Product is not currently available in a resistance matched or sorted option.
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