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AS-7 [TTELEC]

Semi-Precision Power Wirewound Resistor; 半精密功率线绕电阻器
AS-7
型号： AS-7
厂家： TT Electronics    TT Electronics
描述：

Semi-Precision Power Wirewound Resistor
半精密功率线绕电阻器

电阻器 线绕电阻器
文件： 总3页 (文件大小：435K)
中文：  中文翻译
下载：  下载PDF数据表文档文件
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Semi-Precision Power  
Wirewound Resistor  
Welwyn Components  
AS Series  
• 0.25 to 10 watts  
• Tolerance down to 0.5ꢀ  
• 0.1 ohm to 175K ohms  
• Resistance wire TCR 20 ꢁꢁmꢂ/C  
Electrical Data  
Equivalent  
MIL-R-26  
Style  
Power Rating  
(watts)  
Commercial Range  
(ohms)  
Non-Inductive Range  
(ohms)  
Available Resistance  
(ohms)  
Tyꢁe  
125/C  
25/C  
Min.  
0.1  
0.1  
0.1  
.05  
0.1  
Max.  
1.0K  
6.0K  
7.5K  
2K  
Min.  
*
Max.  
*
0.5ꢀ, 1ꢀ  
1-1K  
3ꢀ, 5ꢀ  
0.1-1K  
AS-1ꢂ4  
AS-1ꢂ2  
AS-1  
RW81  
0.5  
0.5  
1
1
1
2
2
3
*
*
1-6K  
0.1-6K  
RW70U  
0.1  
*
3.8K  
*
1-7.5K  
1-2K  
0.1-7.5K  
.05-2K  
AS-1C  
AS-2  
1
RW-69V/  
RW79U  
2
20K  
0.5  
10K  
1-20K  
0.1-20K  
AS-2B  
AS-2C  
AS-3  
3
2
3
5
4
3
5
7
0.1  
0.1  
0.1  
0.1  
24K  
18K  
30K  
60K  
0.5  
0.2  
0.5  
0.8  
12K  
7.5K  
15K  
30K  
1-24K  
1-18K  
1-30K  
1-60K  
0.1-24K  
0.1-18K  
0.1-30K  
0.1-60K  
AS-5  
RW74U/  
RW67U  
AS-7  
7
9
0.1  
0.1  
90K  
1.0  
3.0  
45K  
50K  
1-90K  
0.1-90K  
AS-10  
RW68V/  
RW78U  
10  
14  
175K  
1-175K  
0.1-175K  
Inductance of AS-1/2 is less than 1µH at 1MHz.  
* Typical inductance of AS-1C <5ohms is <1µH.  
To order non-inductive types, add the prefix ‘N’. Example: NAS-1, NAS-2C, etc. Lower values available upon request.  
Physical Data  
Dimensions (mm)  
Type  
A
0.81  
6.4  
B (max)  
2.4  
C (max)  
7.9  
D (Lead Diameter)  
1.50 min.  
(38.1)  
A
C
AS-1ꢂ4  
AS-1ꢂ2  
AS-1  
0.5  
0.5  
D
B
7.9  
9.3  
2.4  
9.5  
3.2  
10.9  
7.7  
0.5  
0.64  
0.8  
AS-1C  
AS-2  
6.5  
2.9  
0.64  
Please note lead length dimension change on the following  
two items only:  
AS-2B 33.0mm (min)  
AS-2C 33.0mm (min)  
12.2  
13.7  
11.0  
17.5  
22.2  
31.8  
46.0  
6.3  
15.2  
16.6  
15.1  
20.6  
24.9  
35.0  
49.2  
0.8  
0.8  
0.8  
1.0  
1.0  
1.0  
1.0  
AS-2B  
AS-2C  
AS-3  
5.6  
4.0  
Note:  
7.2  
• Coating and marking is resistant to normal freon  
degreasing.  
Consult factory for special requirements.  
• AS marking available in Alpha Numeric or Colourbanding -  
identification available.  
AS-5  
8.8  
AS-7  
8.8  
AS-10  
9.8  
* Leads are solder plated. AS-1C leads are copper. All others are 40% conductivity copper sheathed steel.  
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 Comꢁonents 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 D · 03.06  
91  
Semi-Precision Power  
Wirewound Resistor  
AS Series  
Welwyn Components  
Power Derating  
Temꢁerature Rise @ 25/C  
275  
200  
AS-7, 10  
250  
AS-1/4, 1/2, 1, 1C  
AS-2A, 2C  
AS-2B  
175  
AS-3, AS-5  
AS-3, 2  
200  
150  
AS-2A, 2C  
AS-2C  
AS-5, 10  
150  
100  
AS-1/2  
125  
AS-2B  
100  
AS-1/4  
AS-7  
50  
25  
75  
0
0
40  
80  
120  
160  
200  
25  
75  
125  
175  
225  
275  
Percent of 25C Power Rating  
Ambient Temperature (C)  
Temꢁerature Rise @ 125/C  
Selected Pulse-Handling Caꢁability @ 125/C  
275  
14  
AS-7, 10  
AS-2A  
12  
10  
250  
AS-3, AS-5  
AS-3  
AS-2  
AS-2B  
AS-2  
AS-2A, 2C  
AS-1/2  
8
6
4
2
0
200  
AS-2B  
AS-2C  
AS-1/4  
AS-1  
150  
125  
AS-1/2  
AS-1/4  
0.2  
0
40  
80  
120  
160  
200  
0.1  
0.5  
1
2
5
10  
Resistance (ohms)  
Percent of 125°C Power Rating  
Environmental Testing at 25/C  
Test Condition  
Load Life 1000 hours  
Moisture Resistance  
Temperature Cycle  
Short Time Overload  
Low Temperature Operation  
Solder Heat  
Max ∆R  
1.0%  
1.0%  
0.5%  
0.5%  
0.5%  
0.25%  
0.5%  
0.5%  
Shock  
Vibration  
Packaging  
Standard Quantities Per Package  
Parts are supplied taped and reeled.  
Standard quantity per reel.  
AS 1ꢂ4, 1ꢂ2, 1C  
AS 1, 2, 2B, 2C  
AS 3  
2,000  
1,000  
1,000  
500  
AS 5, 7, 10  
© Welwyn Comꢁonents 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 D · 03.06  
92  
Semi-Precision Power  
Wirewound Resistor  
AS Series  
Welwyn Components  
Ordering Procedure  
Specify type reference, value and tolerance as shown in this example of AS1/4 1K0 5%:  
Type  
AS1ꢂ4  
1K0  
J
Resistance value  
(IEC62 code)  
Tolerance  
(IEC62 code)  
F
1%  
G
J
2%  
5%  
© Welwyn Comꢁonents 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 D · 03.06  

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