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參數(shù)資料
| 型號(hào)： | PCR |
| 廠商： | TT Electronics / Welwyn |
| 英文描述： | Precision Thick Film Surface Mounted Resistors |
| 中文描述： | 精密厚膜表面貼裝電阻 |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大小： | 99K |
| 代理商： | PCR |
Dimensions of standard styles (mm) & Weight (g)
Wrap around
planar
Style
L
W
T
A
B*
C
Wt
0805
2.0 ± 0.3 1.25 ± 0.2
0.6
0.3 ± 0.15
0.9min
0.3 ± 0.1
0.009
1005
2.5 ± 0.3 1.25 ± 0.2
0.7
Not available
0.4 ± 0.15
0.015
1206
3.2 ± 0.4
1.6 ± 0.2
0.7
0.4 ± 0.2
1.7min
0.4 0.15
0.020
Precision Thick Film
Surface Mounted Resistors
PCR Series
Tolerance down to 0.1%
Excellent load stability
Termination available for wire bonding or
soldering
Resistance range 10 ohms to 1M ohms
Any resistance value available within
specified range
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.
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
Electrical Data
Issue D · 08.04
A subsidiary of
TT electronics plc
Welwyn Components
PCR0805
PCR1005
PCR1206
Notes
Power rating at 70°C
watts
0.1
0.125
0.25
Resistance range
ohms
10R to 1M
Limiting element voltage
volts
100
150
200
TCR -55°C to +155°C
ppm/°C
100
TCR +20°C to +70°C
ppm/°C
50
Resistance tolerance
%
0.1, 0.25, 0.5, 1
Values
E24 & E96 preferred
Any value to order
Thermal impedance
°C/watt
360
290
200
For 10 devices mounted
on a 50 x 25 mm p.c.b. area
Ambient temperature range*
°C
-55 to 155
Physical Data
*See Application Notes
T
W
A
A
B
L
Wrap-around terminations
(3 faces)
T
W
L
Planar terminations
C
C
*This dimension determines the number of conductors which may pass under the surface mounted device.
Construction
Thick film resistor material, overglaze and organic protection
are screen printed on a 96% alumina substrate.
Adjustment
The components are adjusted to final value using a specially
developed technique, which assures optimum load stability
performance.
Terminations
Planar (or single-sided) termination is gold and suitable for
wire-bonding; wrap around is suitable for soldering.
Solderability
Wrap-around terminations have an electroplated nickel barrier
and solder coating, this ensures excellent ‘leach’ resistance
properties and solderability. They will withstand immersion in
solder at 260°C for 30 seconds.
Alternative styles for surface
mounting resistors
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