TR250-145U Tyco Electronics, TR250-145U Datasheet - Page 3

• Manufacturer Part Number: TR250-145U
• Description: POLYSWITCH 0.145A HOLD UNENCAPS
• Manufacturer: Tyco Electronics
• Series: PolySwitch®r

Specifications of TR250-145U

• R Min/max: 3.500 ~ 6.500 Ohm
• Voltage - Max: 60V
• Time To Trip: 2s
• Current - Hold (ih) (max): 145mA
• Current - Trip (it): 290mA
• Current - Max: 3A
• Package / Case: Radial
• Holding Current: 0.145A
• Tripping Current: 0.29A
• Initial Resistance Max: 6.5ohm
• Initial Resistance Min: 3.5ohm
• Resistance R1: 12ohm
• Peak Reflow Compatible (260 C): No
• Fuse Terminals: Radial Leaded
• Thermistor Type: PTC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: TR145U

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
Central office switching equipment (*)
Analog/POTS linecards, ISDN linecards,
xDSL modems, ADSL/VDSL splitters,
T1/E1 linecards, multiplexers,
CSU/DSU, servers
Primary protection modules (*)
MDF modules, Network Interface
Devices (NID)
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 systems
Power passing taps
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.
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†FT600-1250 are surface mount Telecom fuse devices. FT600-0500 and FT600-2000 reference also available. See FT600 section.
Raychem Circuit Protection
Protection Application Guide for Telecommunications and Networking Devices
To use this guide, follow the steps below:
1. Select your equipment type
2. Select the type of protection
For more information on Raychem Circuit Protection SiBar thyristor surge protectors, refer to the SiBar product section on page 339.
from the guide below.
depending on the agency and
regional specifications in the
second column.
Region/
Specification
North America
TIA-968-A (formerly
FCC Part 68),
UL 60950
Europe/Asia/
South America
ITU K.21
North America
Telcordia GR-1089
Europe/Asia/
South America
ITU K.45
North America
Telcordia GR-1089
Europe/Asia/
South America
ITU K.20
North America
Telcordia GR-974
Europe/Asia/
South America
ITU K.20
North America
Telcordia GR-1089
intrabuilding
Europe/Asia/
South America
ITU K.21
3. Use the Key Device Selection
Criteria (size, resistance, time-
to-trip) to determine best suit-
ability for your application.
PolySwitch Resettable Devices
Key Device Selection Citeria
Small Footprint
TSM600-250
TRF600-150
TS600-170
FT600-1250
TRF250-180
TR250-120
TR250-145
TS250-130
TSV250-130
TSM600-250
TR600-160
TS600-200-RA
FT600-1250
TRF250-180
TR250-120
TR250-145
TS250-130
TSV250-130
TSM600-250
TR600-160
TS600-200-RA
FT600-1250
TRF250-180
TR250-120
TR250-145
TS250-130
TSV250-130
TRF250-180
TCF250-180
TCF250-120T
TR240-120T
TR250-120T
TS250-130
TSV250-130
TSL250-080
TR250-120
TS250-130
TRF250-180
TR250-120
TR250-145
TS250-130
TSV250-130
TSL250-080
SMD050-2018
BBR550
PolySwitch Telecommunications and Networking Resettable Devices
†
Low Resistance
TSM600-250-RA
TRF600-150
TS600-200-RA
FT600-1250
TRF250-180
TS250-130-RA
TSV250-130
TSM600-250-RA
TR600-160-RA
TS600-200-RA
FT600-1250
TRF250-180
TS250-130-RA
TSV250-130
TSM600-250-RA
TR600-160-RA
TS600-200-RA
FT600-1250
TRF250-180
TS250-130-RA
TSV250-130
TRF250-180
TCF250-180
TC250-145T
TGC250-145T
TR250-145-RA
TS250-130-RA
TSV250-130
TR250-145
TRF250-180
TS250-130-RA
TSV250-130
TRF250-180
TS250-130-RA
TSV250-130
TSL250-080
SMD050-2018
BBR750
4. Use the Agency Specification/
Telecommunications and Networking
PolySwitch Device Selection
Guide on the next page to
select a specific part number
for each application based on
the agency requirements.
Fast Time-to-Trip
TSM600-250
TRF600-150
TS600-170
TR250-120T-R2
TS250-130-RB
TSM600-250
TR600-160
TS600-170
TR250-120T-R2
TS250-130-RB
TSM600-250
TR600-160
TS600-170
TR250-120T-R2
TS250-130-RB
TRF250-180
TCF250-180
TCF250-120T
TGC250-120T
TR250-120T-R2
TS250-130-RB
TR250-120T-R2
TSL250-080
TR250-120T-R2
TS250-130-RB
TSL250-080
SMD050-2018
BBR550
SiBar Thyristor
Surge Protectors
TVBxxxSA or
TVAxxxSA with
TR/TS; TVBxxxSC
with TR/TS or fuse
TVBxxxSA
TVAxxxSA
TVBxxxSC
TVBxxxSA
TVAxxxSA
TVBxxxSC
TVBxxxSA
TVAxxxSA
N/A
N/A
TVBxxxSA
TVAxxxSA
TVBxxxSA
TVAxxxSA
TVBxxxSA
TVAxxxSA
N/A
N/A
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