|
■ 外型尺寸
|
型号
|
250℃下额定功率(w)带散热板
|
外形尺寸(mm)
|
|
|
电 阻 体
|
标准散热板(铝)
|
|
amax
|
b |
lmax |
hmax |
c |
l |
l1 |
m |
n |
ф1
|
ф2
|
表面积cm2 |
厚度(mm) |
| rx24 |
5 |
155 |
16 |
36.5 |
8 |
8.5 |
11.4 |
12 |
4.4 |
1.5 |
1.5 |
2.2 |
415 |
1 |
3 |
| 10 |
19.5 |
21 |
40.5 |
10 |
11.2 |
14 |
16 |
5 |
2 |
2 |
2.5 |
415 |
6 |
| 20 |
27 |
27 |
48.0 |
13 |
14.3 |
18.3 |
20 |
7 |
2 |
2 |
3.5 |
535 |
11 |
| 30 |
34 |
29 |
55.0 |
15.5 |
16.3 |
25 |
22 |
7.3 |
2 |
2 |
3.5 |
535 |
18 |
| 50 |
50 |
29 |
71 |
15.5 |
16.3 |
40 |
22 |
7.3 |
2 |
2 |
3.5 |
995 |
30 |
| 75 |
65.5 |
48 |
86.5 |
26 |
27 |
23.5 |
37 |
11.5 |
3.5 |
3 |
4.4 |
995 |
3 |
90 |
| 100 |
98 |
48 |
119 |
26 |
27 |
35 |
37 |
11.5 |
3.5 |
3 |
4.4 |
995 |
160 |
| 150 |
130 |
48 |
151 |
26 |
27 |
35 |
37 |
11.5 |
3.5 |
3 |
4.4 |
995 |
240 |
| rxg24 |
75 |
65.5 |
48 |
93.5 |
26 |
27 |
23.5 |
37 |
11.5 |
3.5 |
m3 |
4.4 |
995 |
90 |
| 100 |
98 |
48 |
126 |
26 |
27 |
35 |
37 |
11.5 |
3.5 |
m3 |
4.4 |
995 |
160 |
| 150 |
130 |
48 |
158 |
26 |
27 |
52 |
37 |
11.5 |
3.5 |
m3 |
4.4 |
995 |
240 |
| 200 |
92 |
73 |
132 |
45 |
46.5 |
35 |
58 |
21 |
5 |
m6 |
5.5 |
3750 |
420 |
| 250 |
112 |
73 |
152 |
45 |
46.5 |
45 |
58 |
21 |
5 |
m6 |
5.5 |
4765 |
480 |
| 300 |
130 |
73 |
170 |
45 |
46.5 |
51 |
58 |
21 |
5 |
m6 |
5.5 |
5780 |
580 |
| 500 |
204 |
73 |
244 |
45 |
46.5 |
87 |
58 |
21 |
5 |
m6 |
5.5 |
8500 |
970 |
■ 主要技术指标
| 型 号 |
额定功率(w) |
阻值范围(ω) |
阻值允许偏差(%) |
温度系数 (×10-6/℃) |
绝缘电压(v) |
最高过负荷电压(v) |
| 带散热板 |
不带散热板 |
| rx24 |
5 |
3 |
0.01ω～1kω |
f(±1%)
d(±5%)
|
±100
±50
|
1000 |
1500 |
| 10 |
8 |
0.01ω～1.5kω |
| 20 |
12.5 |
0.01ω～7.5kω |
| 30 |
15 |
0.01ω～10kω |
| 50 |
20 |
0.01ω～15kω |
| rxg24 |
75 |
45 |
0.01ω～20kω |
2000 |
3000 |
| 100 |
50 |
0.01ω～24kω |
| 150 |
55 |
0.01ω～30kω |
| 200 |
55 |
0.01ω～36kω |
| 250 |
60 |
0.01ω～39kω |
| 300 |
75 |
0.01ω～47kω |
| 500 |
200 |
0.01ω～51kω |
■主要检验项目、试验方法及性能要求
| 检验项目 |
性能要求 |
试验方法 |
| 电阻温度系数 |
≤±100(×10-6/℃)
|
-55℃/+20℃ 20℃/+125℃
|
| 引出端强度 |
r≤±(1%r+0.05ω)
|
拉力40n |
| 耐电压 |
无击穿或飞弧 |
交流电压，其峰值为绝缘电压的1.42倍，1min |
| 可焊性 |
焊料能自由流动并与引线润湿 |
235±5℃ 2±0.5s
|
| 耐焊接热 |
δr≤±(1%r+0.05ω)
|
260±5℃ 10±1s
|
| 过载 |
δr≤±(1%r+0.05ω)
|
5倍额定功率 5s |
| 温度快速变化 |
δr≤±(1%r+0.05ω)
|
-55℃/+125℃ 5次循环 |
| 振动 |
δr≤±(1%r+0.05ω)
|
10～500hz 98m/s2
|
|
表面温升
|
≤275℃ |
vr |
| 耐脉冲 |
δr≤±(0.2%r+0.05ω) |
mil-std-202 100g,6毫秒10次 |
| 长期负荷 |
δr≤±(1%r+0.05ω)
|
+25±2℃ vr 1000h |
| 稳态湿热 |
δr≤±(1%r+0.05ω)
|
+40±2℃ 湿度95～93% 240h |
|