TR250-145U Tyco Electronics, TR250-145U Datasheet - Page 20

• 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

4
Table T7. Recommended Pad Layouts for Surface-mount Telecommunications and Networking Devices in
millimeters (inches) Nominal
Device
TS250 (All)
TSV250-130
TSL250-080
TS600 (All)
TSM600
SMD030-2018
SMD030
SMD050-2018
miniSMDC014
miniSMDC014F
Note: *Indicates minimum dimension.
320
PolySwitch Telecommunications and Networking Resettable Devices
10.42
(0.18)
(0.09)
(0.14)
(0.410)
(0.205)
(0.18)
(0.12)
(0.18)
(0.124)
(0.124)
4.6
2.29
3.6
5.20
4.6
3.1
4.6
3.15
3.15
A
17.80
(0.07)
(0.095)
(0.07)
(0.130)
(0.701)
(0.06)
(0.09)
(0.06)
(0.07)
(0.07)
1.8
2.41
1.8
3.30
1.5
2.3
1.5
1.78
1.78
B
(0.24)
(0.25)
(0.22)
(0.132)
(0.218)
(0.13)
(0.20)
(0.13)
(0.136*)
(0.136*)
6.1
6.35
5.5
3.35
5.54
3.4
5.1
3.4
3.45*
3.45*
C
(0.135)
A
(0.266)
3.43
6.75
A
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
D
A
C
B
B
(0.082)
2.08
E
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Figure T18
Figure T19
Figure T20
C
B
D
C
(0.123)
B
3.12
F
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
B
A
E
F
(0.331)
Raychem Circuit Protection
8.39
G
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
D
G
Figures for
Dimensions
T18
T19
T18
T18
T20
T18
T18
T18
T18
T18