LRZ [TTELEC]
High Current Jumper Chip; 高电流跳线芯片
| 型号： | LRZ |
| 厂家： | 
TT Electronics |
| 描述： | High Current Jumper Chip |
| 文件： | 总3页 (文件大小：268K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
High Current Jumper Chip
Weellwwyynn CCoommppoonneennttss
LRZ Series
• High current zero-Ohm link
• Thick film copper technology
• Current rating to 35A
• Typical resistance 1.5mΩ
• Inductance below 0.2nH
Electrical Data
Size
0805
15
1206
2010
30
2512
35
Notes
Current rating @ 70 °C
2 second overload current @ 25ºC
Resistance
Amps
Amps
Ohms
°C
20
40
DC or AC rms
0.0015 typ.
30
60
70
0.003 max.
-55 to +150
200
Ambient temperature range
Dielectric withstand voltage
Temperature rise at rated current
Pad & trace area for rated current
Volts
ºC
mm2
30
40
40
80
90
50
100
300
See Application Notes
Physical Data
Dimensions (mm) & Weight (g)
L
W
T
A
C
Wt
C
T
0805
1206
2010
2512
2.0 0.3
1.25 0.2
0.61 0.1
0.3 0.15
0.3 0.1
0.009
0.020
0.036
0.055
A
3.20 0.31 1.63 0.2
0.61 0.1 0.48 0.25 0.48 0.25
L
W
A
5.23 0.38 2.64 0.25 0.74 0.1 0.48 0.25 0.48 0.25
6.5 0.38 3.25 0.25 0.74 0.1 0.48 0.25 0.48 0.25
Wrap-around terminations
(3 faces)
Construction
A thick film copper conductive element and organic
protection are screen printed on a 96% alumina substrate.
withstand immersion in solder at 260˚C for 30 seconds and
are suitable for reflow or wave soldering processes.
Terminations
Marking
The wrap-around copper terminations have an electroplated
nickel barrier and solderable coating, which ensures excellent
‘leach’ resistance properties and solderability. Chips can
The body protection is resistant to all normal cleaning solvents
suitable for printed circuits. Chips are marked R000 except for
0805 size which are not marked.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue B · 02.05
29
High Current Jumper Chip
LRZ Series
Weellwwyynn CCoommppoonneennttss
Temperature Derating
Derating Characteristic
120%
100%
80%
60%
40%
20%
0%
0
50
100
150
Ambient Temperature (˚C)
Pulse Performance
Continuous Pulse Performance
1000
100
10
LRZ1206
LRZ2010
LRZ2512
1
10
100
0.1
1000
Pulse Duration (ms)
Application Notes
de-rating should be applied. The minimum recommended pad
and trace areas close to the resistor stated under Electrical
Data should be provided at each terminal. For multi-layer
PCB’s, this minimum area requirement should be met by
surface layers rather than buried layers. The actual solder pad
area follows the normal design rules for chip resistors.
Conventional thick film “zero-Ohm” jumper chips typically
have up to 50mΩ resistance values and 1 to 2A current
ratings. LRZ jumper chips offer a solution for currents over an
order of magnitude greater by combining lower resistance
values with better thermal conductivity.
Care should be taken when designing the associated printed
circuit board tracks to ensure that they can carry the required
current without excessive heating, for example by using
multiple layers thermally linked with many vias. Any
temperature rise caused by power dissipated in the PCB tracks
themselves should be allowed for when calculating the
ambient temperature in order to determine whether power
LRZ jumper chips themselves can operate at a maximum
temperature of 150˚C (see performance above). For
conventionally soldered jumper chips, the joint temperature
should not exceed 110˚C. This condition is met when the
stated current levels at 70˚C are used.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue B · 02.05
High Current Jumper Chip
LRZ Series
Weellwwyynn CCoommppoonneennttss
Packaging
LRZ jumper chips are supplied taped and reeled as per IEC 286-3.
T2
P0
D0
P2
T
33 1.ꢀ
Wr
Marking
13 ꢀ.5
T1
A0
D1
ꢀ.8 ꢀ.15
2.5 ꢀ.5
K0
P1
Tape and Reel Dimensions (mm)
Qty.
Wr
0.5
9
W
0.3
8
P1
0.1
4
P0
0.1
4
P2
D0
0.1
1.5
1.5
1.5
1.5
D1
0.2
1
E
F
A0
0.1
B0
K0
0.1
1.0
1.0
T
T1
T2
per
0.05
0.1
1.75
1.75
1.75
1.75
0.05
3.5
3.5
5.5
5.5
0.1
2.3
0.05 Nom.
0.2 0.05
0.2 0.05
0.15 reel
1.3
0805
1206
2
2
2
2
1.45
9
8
4
4
1
1.95 3.55
1.3 3000
2010 13
2512 13
12
12
8
4
1.5
1.5
2.79 5.89 0.91 0.28 0.06 1.21 3000
3.61 6.96 1.17 0.28 0.06 1.45 1800
8
4
Ordering Procedure
Specify type reference etc. as shown in this example of LRZ1206:
Type
LRZ
1206
R000
LRZ - Zero Ohm Jumper
Size
1206; 2010; 2512
Resistance Code
Value R000 only
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue B · 02.05
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