TR250-145U Tyco Electronics, TR250-145U Datasheet - Page 21

• 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

Raychem Circuit Protection
Part Numbering System for Telecommunications and Networking Devices
Resistance-sorted and Resistance-matched Devices
Most TC, TCF, TGC, TR
Resistance-sorted Devices
Resistance sorted devices (part number suffix “Rx”, where x = 1, 2, A, B, C, F etc.) are supplied with resistance values
that are within specified segments of the device’s full range of resistance.
Resistance-matched Devices
Resistance-matched devices are supplied such that all parts in one particular package (or reel) are within 0.5 of each
other (1.0 for TR250-080T devices). Individual matched packages are supplied from the full resistance range of the
specified device.
*F = lead free
SMD
Feature
• Narrow resistance range.
Benefits
• Greater flexibility for design engineers.
• Lower resistance devices can allow for increased loop length on line card designs.
• Higher resistance devices may provide greater protection by offering faster time-to-trip.
Feature
• Tighter resistance balance between any two parts in a package.
Benefit
• Resistance-matched devices may reduce the tip-ring resistance differential, reducing the possibility of line imbalance.
030
/30
,
and TS devices are available in resistance-sorted and/or resistance-matched versions.
B-x.x = Resistance matched in bins of x.xΩ (optional)
Rx = Resistance range (optional)
Modifier (optional)
U - Uncoated chip S - Straight lead T - Fast Trip device
Product series (TC, TCF, TGC, TRx, TRFx*, TSx, TSMx)
Alternative Voltage rating (if applicable)
Hold Current Indicator
Product series
(blank) = Bulk
2 = Tape and reel packaging
Hold Current (mA)
PolySwitch Telecommunications and Networking Resettable Devices
2 = Tape and reel packaging
Telecommunications and Networking
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