POLYSWITCH RESETTABLE
DEVICES
The PolySwitch families of telecommunications and
networking devices help meet the growing demand
for resettable overcurrent protection. These product
families help provide protection against damage caused
by power cross and power induction surges as defined
in ITU, Telcordia GR1089 and UL60950. Available in
chip, surface-mount and radial-leaded configurations,
Littelfuse’s PolySwitch devices help improve the reliability
of customer premise and network equipment worldwide.
Telecommunications and Networking Devices
BENEFITS
• Choice of many product options helps engineers by
improving design flexibility
• Compatible with high-volume electronics assembly
• Assist in meeting regulatory equipment requirements
• Help improve line balance
• Applicable for legacy POTS and modern digital
communications equipment
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 Internet Protocol) equipment
• LAN, WAN equipment
• Customer premise equipment
• Access network hardware
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
RoHS
RoHS Compliant, ELV Compliant
Specifications subject to change without notice. ©2018 Littelfuse, Inc.
232
PolySwitch Resettable Devices
Telecommunications and Networking Devices
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 a Littelfuse PolySwitch representative.
Overcurrent Protection
Region/
Application
Customer Premise 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
Europe/Asia/
South America
ITU K.21
Specification
North America
TIA-968-A,
UL 60950,
GR1089 Port Type 3
‡
Form Factor
Radial-leaded
TRF600-150
TR600-150F-EX
TRF600-160
TRF600-250
TRF-600-400
TRF250-120
TRF250-120T
TRF250-120U
TRF250-120UT
TRF250-145
TRF250-145T
TRF250-145U
TRF250-180
TRF250-183
TRF250-183U
TRF250-184
Access network equipment (†)
Remote Terminals, Line Repeaters,
Multiplexers, Cross-Connects,
WAN Equipment
Europe/Asia/
South America
ITU K.45
TRF250-120
TRF250-120T
TRF250-120U
TRF250-120UT
TRF250-145
TRF250-145T
TRF250-145U
TRF250-180
TRF250-183
TRF250-183U
TRF250-184
North America
GR1089 Port Type 5
‡
Surface-mount
TS600-170F
TS600-200F
TSM600-250F
TSM600-400F
TS250-130F
TSV250-130F
TSV250-184F
TSL250-130F
Chip
TCF250-120
TCF250-145
TCF250-180T
TRF600-160
TRF600-250
TRF600-400
TS600-170F
TS600-200F
TS600-400F
TSM600-250F
TSM600-400F
TS250-130F
TSV250-130F
TSV250-184F
TSL250-130F
TCF250-120
TCF250-145
TCF250-180T
233
Specifications subject to change without notice. ©2018 Littelfuse, Inc.
RoHS
RoHS Compliant, ELV Compliant
PolySwitch Resettable Devices
Telecommunications and Networking Devices
Application Guide for Telecommunications and Networking Devices*
Overcurrent Protection
Region/
Application
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
TRF250-120
TRF250-120T
TRF250-120U
TRF250-120UT
TRF250-145
TRF250-145T
TRF250-145U
TRF250-180
TRF250-183
TRF250-183U
TRF250-184
Primary protection modules (†)
MDF modules, Network Interface
Devices (NID)
North America
Telcordia GR-974
Europe/Asia/
South America
ITU K.20
TRF250-180
TRF250-183
TRF250-184
TRF250-055T
TRF250-055UT
TRF250-080T
TRF250-080U
TRF250-110U
TRF250-120
TRF250-120T
TRF250-120U
TRF250-120UT
TRF250-145
TRF250-145T
TRF250-145U
TRF250-180
TRF250-183
TRF250-183U
TRF250-184
TSL250-080F
TS250-130F
TSV250-130F
TSV250-184F
TSL250-130F
TCF250-100T
TCF250-120
TCF250-120T
TCF250-145
TCF250-145T
TCF250-180T
TSV250-184F
Specification
North America
GR1089 Port Type 1
‡
(Cont’d)
Form Factor
Radial-leaded
TRF600-160
TRF600-250
TRF600-400
Surface-mount
TS600-170F
TS600-200F
TS600-400F
TSM600-250F
TSM600-400F
TS250-130F
TSV250-130F
TSV250-184F
TSL250-130F
TCF250-120
TCF250-145
TCF250-180T
Chip
RoHS
RoHS Compliant, ELV Compliant
Specifications subject to change without notice. ©2018 Littelfuse, Inc.
234
PolySwitch Resettable Devices
Telecommunications and Networking Devices
Application Guide for Telecommunications and Networking Devices*
Overcurrent Protection
Region/
Application
Short-haul/intrabuilding communications
equipment (†)
LAN Equipment, VoIP Cards, Cable
Telephony NIUs, Wireless Local Loop
Handsets
Specification
North America
GR1089 Port Type 2
GR1089 Port Type 4
‡
‡
(Cont’d)
Form Factor
Radial-leaded
TRF250-080T
TRF250-080U
TRF250-120
TRF250-120T
TRF250-120U
TRF250-120UT
TRF250-145
TRF250-145T
TRF250-145U
TRF250-180
TRF250-183
TRF250-183U
TRF250-184
Surface-mount
TSL250-080F
TS250-130F
TSV250-130F
TSV250-184F
TSL250-130F
Chip
TCF250-120
TCF250-145
TCF250-180T
Europe/Asia/
South America
ITU K.21
TRF250-120
TRF250-120T
TRF250-120U
TRF250-120UT
TRF250-145
TRF250-145T
TRF250-145U
TRF250-180
TRF250-183
TRF250-183U
TSV250-184
TS250-130F
TSV250-130F
TSV250-184F
TSL250-130F
TCF250-120
TCF250-145
TCF250-180T
LAN Intrabuilding Power Cross Protection
LAN Equipment, VoIP Cards, IP Phones
North America
GR1089 Port Type 4
‡
TRF250-080T
TRF250-080U
TRF250-120
TRF250-120T
TRF250-120U
TRF250-120UT
TRF250-145
TRF250-145T
TRF250-145U
TRF250-180
TRF250-183
TRF250-183U
TRF250-184
TSL250-080F
TS250-130F
TSV250-130F
TSV250-184F
TSL250-130F
TCF250-120
TCF250-145
TCF250-180T
IEEE 802.3AF/AT Power over Ethernet protection
Powered Ethernet Switches and Terminals,
IP phones, Wireless LAN Base Stations,
Microcellular Base Stations, VoIP Cards
decaSMDC050F/60-2**
*
†
‡
This list is not exhaustive. Littelfuse welcomes our customers’ input for additional application ideas for PolySwitch resettable devices.
For improved line balance in these applications, resistance-matched parts are recommended.
May require additional impedance or coordination with primary protector.
** For details on decaSMDC050F/60-2, please refer to surface-mount devices product brochure.
235
Specifications subject to change without notice. ©2018 Littelfuse, Inc.
RoHS
RoHS Compliant, ELV Compliant
PolySwitch Resettable Devices
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*
TCF250-100T
Lightning
ITU K.20 – 1.0kV 10/700µs
GR-1089 Port Types 2 and 4 – 1st Level
Power Cross/Contact/Induction
PRC YD/T694
ITU K.20/21/45 – 0.2A
2
s
ITU K.20/21/45 – 1A
2
s
†
GR-1089 Port Type 4 – 120V
AC
, 25Asc
TCF250-120
TCF250-120T
TCF250-145
TCF250-145T
TCF250-180T
TRF250
TRF250-055T
TRF250-055UT
TRF250-080T
TRF250-080U
TRF250-110U
TRF250-120
TRF250-120T
TRF250-120U
TRF250-120UT
TRF250-145
TRF250-145T
TRF250-145U
TRF250-180
TRF250-183
TRF250-183U
TRF250-184
ITU K.20/21/45 – 1.5kV 10/700µs
ITU K.20/21/45 – 4.0kV 10/700µs
‡
GR-1089 Port Types 2 and 4 – 1st Level
ITU K.20/21/45 – 230V
AC
, 10Ω**
ITU K.20/21/45 – 0.2A
2
s
ITU K.20/21/45 – 1A
2
s
‡
ITU K.20/21/45 – 10A
2
s
‡
GR-1089 Port Type 4 – 120V
AC
, 25Asc
TS250/TSV250
TSV250-130F
TS250-130F
ITU K.20/21/45 – 1.5kV 10/700µs
ITU K.20/21/45 – 4.0kV 10/700µs
†
GR-1089 Port Types 2 and 4 – 1st Level
ITU K.20/21/45 – 230V
AC
, 10Ω
ITU K.20/21/45 – 0.2A
2
s
ITU K.20/21/45 – 1A
2
s
†
ITU K.20/21/45 – 10A
2
s
†
GR-1089 Port Type 4 – 120V
AC
, 25Asc
TS250-130F-RB
ITU K.20/21/45 – 1.5kV 10/700µs
ITU K.20/21/45 – 4.0kV 10/700µs
‡
GR-1089 Port Types 2 and 4 – 1st Level
ITU K.20/21/45 – 230V
AC
, 10Ω
ITU K.20/21/45 – 0.2A
2
s
ITU K.20/21/45 – 1A
2
s
‡
ITU K.20/21/45 – 10A
2
s
‡
GR-1089 Port Type 4 – 120V
AC
, 25Asc
TSV250-184F
ITU K.20/21/45 – 1.5kV 10/700µs
ITU K.20/21/45 – 4.0kV 10/700µs
‡
GR-1089 Port Types 2 and 4 – 1st Level
ITU K.20/21/45 – 230V
AC
, 10Ω**
ITU K.20/21/45 – 0.2A
2
s
ITU K.20/21/45 – 1A
2
s
‡
ITU K.20/21/45 – 10A
2
s
‡
GR-1089 Port Type 4 – 120V
AC
, 25Asc
TSL250
TSL250-080F
TSL250-130F
GR-1089 Port Types 2 and 4 – 1st Level
ITU K.20 – 1.0kV 10/700µs
GR-1089 Port Type 4 – 120V
AC
, 25Asc
ITU K.20/21/45 – 230V
AC
, 10Ω
ITU K.20/21/45 – 0.2A
2
s
ITU K.20/21/45 – 1A
2
s
†
RoHS
ITU K.20/21/45 – 1.5kV 10/700µs
ITU K.20/21/45 – 4.0kV 10/700µs
†
GR-1089 Port Types 2 and 4 – 1st Level
ITU K.20/21/45 – 230V
AC
, 10Ω
ITU K.20/21/45 – 0.2A
2
s
ITU K.20/21/45 – 1A
2
s
†
ITU K.20/21/45 – 10A
2
s
†
GR-1089 Port Type 4 – 120V
AC
, 25Asc
ITU K.20 – 1.0kV 10/700µs
GR-1089 Port Types 2 and 4 – 1st Level
ITU K.20 – 230V
AC
, 10Ω
ITU K.20 – 0.2A
2
s
ITU K.20 – 1A
2
s
†
GR-1089 Port Type 4 – 120V
AC
, 25Asc
ITU K.20/21/45 – 1.5kV 10/700µs
ITU K.20/21/45 – 4.0kV 10/700µs
†
GR-1089 Port Types 2 and 4 – 1st Level
ITU K.20/21/45 – 230V
AC
, 10Ω
ITU K.20/21/45 – 0.2A
2
s
ITU K.20/21/45 – 1A
2
s
†
ITU K.20/21/45 – 10A
2
s
†
GR-1089 Port Type 4 – 120V
AC
, 25Asc
RoHS Compliant, ELV Compliant
Specifications subject to change without notice. ©2018 Littelfuse, Inc.
236
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