快速响应客户需求
水泥电阻
Cement Resistance
产品特点Product Features
1.耐震、耐湿、耐热及良好的散热。Shock resistance, moisture resistance, heat resistance, and good heat dissipation.
2.完全绝缘，适用于印刷电路板。Completely insulated, suitable for printed circuit boards.
3.瓷棒上绕线然后接头电焊，制出[敏感词]电阻值及延长寿命。Wrap the wire around the porcelain rod and then weld the joint to produce precise resistance values and extend its lifespan.
4.高电阻值采用金属氧化膜体代替绕线方式制成。High resistance value is made by using metal oxide film instead of winding method.
5.耐热性优，电阻温度系数小，呈直线变化。Excellent heat resistance, small temperature coefficient of resistance, and linear variation.
6.耐短时间超负载，低杂音，阻值经年无变化。Resistant to short-term overload, low noise, and resistance unchanged for years.
7.防爆性能好，起保护作用。Good explosion-proof performance, providing protection.
应用范围Application Scope
广泛应用于电源适配器、音响设备、音响分频器、仪器仪表、电视机、汽车等设备中。
Widely used in power adapters, audio equipment, audio dividers, instruments, televisions, cars, and other devices.
额定功率或电压／温度变化相关曲线
Rated power or voltage/temperature variation related curve
性能参数Perforance Parameter
|
测试项目 |
测试条件 |
性能 |
|
温度系数 Temperature coefficient |
分别测试常温及常温+100℃时的电阻值并计算每度的阻值变化率 Test the resistance values at room temperature and at room temperature+100 ℃ separately, and calculate the resistance change rate per degree |
±300ppm℃ |
|
短时间过负荷 |
施加 5 倍的额定电压或[敏感词]负荷电压（取较小者）5 秒 Apply 5 times the rated voltage or maximum load voltage (whichever is smaller) for 5 seconds |
Δ R≤±(2%R+0.05Ω) |
|
耐焊接热 |
在 350℃±10℃的锡炉中浸入 2～3 秒 Immerse in a tin furnace at 350 ℃± 10 ℃ for 2-3 seconds |
Δ R≤±(1%R+0.05Ω) |
|
可焊性 |
在 265℃±5℃锡炉中 2～3 秒 2-3 seconds in a 265 ℃± 5 ℃ tin furnace |
焊锡面积覆盖率 95%以上 Solder area coverage rate of over 95% |
|
温度循环 Temperature cycling |
在-55℃时放置 30 分钟，然后再+25℃时放置 10~15 分钟， 然后在+125℃时放置 30 分钟，然后再+25℃时放置 10~15 分钟，共循环 5 次。 Let it stand at -55 ℃ for 30 minutes, then at+25 ℃ for 10-15 minutes, then at+125 ℃ for 30 minutes, and then at+25 ℃ for 10-15 minutes, in a total of 5 cycles. |
Δ R≤±(1%R+0.05Ω) |
|
耐湿负荷寿命 Moisture resistant load life |
在 70±2℃恒温箱中施加额定电压或[敏感词]工作电压(取小者)1000 小时(通 1.5 小时，断 0.5 小时) Apply rated voltage or maximum operating voltage (whichever is lower) in a 70 ± 2 ℃ constant temperature chamber for 1000 hours (1.5 hours on, 0.5 hours off) |
Δ R≤±(5%R+0.05Ω) |
|
难燃性 |
分别用 5、10、15 倍额定电压交流负荷 5 分钟 for 5 minutes respectively |
不可有明显火焰 |
耐压性能Pressure Resistant Performance
|
功率 Power |
[敏感词]工作电压 Maximum working voltage |
[敏感词]负荷电压 Maximum load voltage |
[敏感词]绝缘电压 Maximum insulation voltage |
|
3W |
350V |
600V |
1000V |
|
5W |
350V |
600V |
1000V |
|
7W |
500V |
700V |
1000V |
|
10W |
750V |
850V |
1000V |
|
15W |
1000V |
1000V |
1000V |
|
20W |
1000V |
1000V |
1500V |
|
25W |
1000V |
1000V |
1500V |
|
50W |
1000V |
1000V |
1500V |
|
100W |
1000V |
1000V |
1500V |
产品结构Product Structure:
|
|||||
|
A |
B |
C |
D |
E |
F |
|
填充料 |
端子 / 镀锡铜线 |
瓷壳 |
玻璃纤维或陶瓷基体或 |
电阻丝或陶瓷基体 |
铁帽 |
|
Filling |
Terminal / |
Ceramic shell |
电阻膜层 |
Resistance wire or |
gossan |
|
material |
Tin plated copper |
Glass fiber or ceramic |
ceramic substrate |
||
|
wire |
matrix or resistive film |
||||
|
layer |
|||||
规格参数Specification Parameters
|
SQP
|
|||||||
|
型号 Type |
功率 power |
阻值范围 Resistance range |
尺寸 dimensions (mm) |
||||
|
L±1.5 |
W±1 |
H±1 |
C±3 |
d±0.05 |
|||
|
SQP |
3W |
0.1R～820K |
22 |
8 |
8 |
35 |
0.75 |
|
5W |
22 |
10 |
9 |
35 |
0.75 |
||
|
7W |
35 |
10 |
9 |
35 |
0.75 |
||
|
10W |
48 |
10 |
9 |
33 |
0.78 |
||
|
15W |
48 |
12.5 |
11.5 |
33 |
0.78 |
||
|
20W |
60 |
14 |
14 |
33 |
0.78 |
||
|
25W |
64 |
14 |
14 |
33 |
0.78 |
||
|
50W |
90 |
19 |
19 |
33 |
0.78 |
||
|
100W |
135 |
24 |
24 |
33 |
0.78 |
||
|
SQM
|
||||||||
|
型号 Type |
功率 power |
阻值范围 Resistance range |
尺寸 dimensions (mm) |
|||||
|
H±1.5 |
W±1 |
D±1 |
P±1 |
L±0.5 |
d±0.05 |
|||
|
SQM |
3W |
0.1R～820K |
25 |
12 |
8 |
4 |
3.5 |
0.75 |
|
5W |
25 |
13 |
9 |
4 |
3.5 |
0.75 |
||
|
7W |
39 |
13 |
9 |
4 |
3.5 |
0.75 |
||
|
10W |
51 |
13 |
9 |
4 |
3.5 |
0.78 |
||
|
15W |
51 |
13 |
9 |
4 |
3.5 |
0.78 |
||
|
20W |
35 |
16 |
12 |
8 |
3.5 |
0.78 |
||
|
SQZ SQZA
|
|||||||||||
|
型号 Type |
功率 power |
阻值范围 Resistance range |
尺寸 dimensions (mm) |
||||||||
|
L±1.5 |
W±1 |
H±1 |
P±3 |
H1±1 |
H2±0.5 |
W1±0.5 |
W2±0.5 |
W3±0.5 |
|||
|
SQZ |
5W |
0.1R～820K |
28 |
10 |
9 |
15 |
10 |
4.5 |
1.5 |
7 |
5 |
|
7W |
36 |
10 |
9 |
20 |
10 |
4.5 |
1.5 |
7 |
5 |
||
|
10W |
48 |
10 |
9 |
30 |
10 |
4.5 |
1.5 |
7 |
5 |
||
|
15W |
48 |
12.5 |
12 |
30 |
30 |
4.5 |
3.0 |
10 |
8 |
||
|
20W |
63 |
15 |
13 |
42 |
30 |
4.5 |
3.0 |
10 |
8 |
||
|
25W |
63 |
15 |
13 |
42 |
30 |
4.5 |
3.0 |
10 |
8 |
||
|
50W |
88 |
19 |
19 |
72 |
30 |
4.5 |
3.0 |
10 |
8 |
||
|
SQH SQHA
|
|||||||||||
|
型号 Type |
功率 power |
阻值范围 Resistance range |
尺寸 dimensions (mm) |
||||||||
|
L±1.5 |
W±1 |
H±1 |
P±3 |
H1±1 |
H2±0.5 |
W1±0.5 |
W2±0.5 |
W3±0.5 |
|||
|
SQH |
5W |
0.1R～820K |
28 |
10 |
9 |
15 |
10 |
4.5 |
1.5 |
7 |
5 |
|
7W |
36 |
10 |
9 |
20 |
10 |
4.5 |
1.5 |
7 |
5 |
||
|
10W |
48 |
10 |
9 |
30 |
10 |
4.5 |
1.5 |
7 |
5 |
||
|
15W |
48 |
12.5 |
12 |
30 |
30 |
4.5 |
3.0 |
10 |
8 |
||
|
20W |
63 |
15 |
13 |
42 |
30 |
4.5 |
3.0 |
10 |
8 |
||
|
25W |
63 |
15 |
13 |
42 |
30 |
4.5 |
3.0 |
10 |
8 |
||
|
50W |
88 |
19 |
19 |
72 |
30 |
4.5 |
3.0 |
10 |
8 |
||
|
SHG
|
||||||||||
|
型号 Type |
功率 power |
阻值范围 Resistance range |
尺寸 dimensions (mm) |
|||||||
|
L±1.5 |
W±1 |
H±1 |
P±3 |
D±0.5 |
E±0.5 |
F±0.5 |
G±0.5 |
|||
|
SHG |
10W |
0.1R～820K |
48 |
10 |
10 |
30 |
5 |
5 |
7 |
12 |
|
15W |
48 |
12.5 |
12 |
30 |
6 |
5 |
9 |
12 |
||
|
20W |
60 |
14.5 |
14 |
42 |
6 |
5 |
9 |
12 |
||
|
25W |
60 |
14.5 |
14 |
42 |
6 |
5 |
9 |
12 |
||
|
30W |
75 |
19 |
19 |
55 |
7.5 |
7 |
9 |
18 |
||
|
40W |
88 |
19 |
19 |
72 |
7.5 |
7 |
9 |
18 |
||
订购信息Ordering Information
|
选型示例：SQP-10W2RJ Selection example: SQP-10W2RJ |
|||
|
SQP |
10W |
2R |
J |
|
型号 |
功率 |
阻值 |
精度 |
|
Type |
Power |
Resistance |
Accuracy |
|
SQP |
2R=2Ω |
F=±1% |
|
|
SQM |
1K=1KΩ |
J=±5% |
|
|
SQZ / SQZA |
K=±10% |
||
|
SQH / SQHA |
|||
|
SHG |
|||
电阻使用建议Suggestions for Using Reslstors
1.电阻在使用电路中[敏感词]留1.5 倍的功率余量，如电路中电压100V，电流0.01A，计算功率P=100*0.01=1W，这时候电阻不能使用1W 的，计算1*1.5=1.5W，没有1.5W 的电阻，故需用到2W 的电阻。
It is best to leave 1.5 times the power margin for resistors in circuits. For example, if the voltage in the circuit is 100V and the current is 0.01A, the calculated power is P=100 * 0.01=1W. At this time, a resistor of 1W cannot be used, and 1 *1.5=1.5W is calculated. There is no 1.5W resistor, so a 2W resistor is needed.
2.电阻在使用过程中不能超过电阻的[敏感词]使用电压，例如：电阻1/4W 10K 的[敏感词]使用电压为
=50V，不是4.0 中的250V。或者1/4W 1M，计算
此时的[敏感词]使用电压为4.0 中的250V，而不是计算得到的500V，取两者中的较小值。
Resistors should not exceed their maximum operating voltage during use. For example, the maximum operating voltage for resistor 1/4W 10K is V=
=50V, not 250V as specified in 4.0. Or 1/4W 1M, calculate
= 500V the highest operating voltage at this time is 250V in 4.0, instead of the calculated 500V,take the smaller of the two.
实验项目Pilot Projects
1.焊锡性测试Soldering test
将受测电阻之导线一端倾斜约45℃方式浸入265℃+5℃锡炉中3 秒钟后取出,检视其附着性(视情形使用助焊剂)。焊锡面积覆盖率95%以上。
Tilt one end of the wire of the tested resistor at approximately 45 ℃ and immerse it in a 265 ℃+5 ℃ tin furnace for 3 seconds, then remove it and inspect its adhesion (using soldering flux as appropriate). The coverage rate of soldering area is over 95%.
2.铜线拉力测试Copper wire tensile test
将电阻放入拉力测试仪器中，固定好电阻两端引线，摇动手把使压力表转至20N，并维持30 秒，引线不可被拉断为合格。
Place the resistor into the tensile testing instrument, fix the leads at both ends of the resistor, shake the handle to turn the pressure gauge to 20N, and maintain it for 30 seconds,The lead wire cannot be pulled off to be qualified.
3.绝缘耐电压试验Insulation withstand voltage test
将受测电阻的导线一端固定于仪器夹上，再将本体以锡箔纸包围至铁帽上沿，此时即可将测试仪器的另一测试棒靠在本体上，将电压调至[敏感词]绝缘电压，并持续60 秒，未击穿为合格。
Fix one end of the wire of the tested resistor onto the instrument clamp, and then wrap the body with tin foil around the top edge of the iron cap. At this point, place the other test rod of the testing instrument against the body, adjust the voltage to the highest insulation voltage, and continue for 60 seconds. If there is no breakdown, it is considered qualified.
4.短时间过负荷之测试及计算方法Short term overload testing and calculation methods
先将测试的电阻器按其电阻值及瓦特数计算出2.5 倍的额定电压(若求得之2.5 倍电压超出该瓦数电阻的[敏感词]负荷电压时,以该瓦数电阻的[敏感词]负荷为额定电压。例：碳膜1/4W 的[敏感词]负荷电压为500V,以240KΩ的电阻计算其2.5 倍额定电压
为612.3V,此时其[敏感词]负荷电压,仍以500V 计算,而不得以612.3V 计算)。再以无波交流电或直流电按期计算的[敏感词]负荷电压，加电压5 秒，其结果必须在无负荷的情况下放置约30 分钟，且电阻不得有异状产生。其电阻的测试前及测试后的变化率则不得超出特性参数所定的各类电阻标准。变化率= （R2-R1）/R1*100%
R1：表示实验前阻值R2 表示试验后阻值
First, calculate 2.5 times the rated voltage of the tested resistor based on its resistance value and wattage (if the calculated 2.5 times voltage exceeds the maximum load voltage of the wattage resistor, the maximum load voltage of the wattage resistor is used as the rated voltage. For example, the maximum load voltage of a carbon film 1/4W is 500V,and the rated voltage is 612.3V calculated based on a 240K Ω resistor. At this time, the maximum load voltage is still calculated as 500V, not 612.3V). The maximum load voltage calculated on a regular basis using non wave alternating current or direct current, with a voltage applied for 5 seconds, must be left unloaded for about 30 minutes without any abnormal resistance. The rate of change of its resistance before and after testing shall not exceed the various resistance standards determined by the characteristic parameters.
Change rate=(R2-R1)/R1 * 100%
R1: represents the resistance before the experiment, R2 represents the resistance after the experiment
5.长时间寿命试验Long life test
先将测试电阻固定于测量夹内,并相互排列,使其不影响相互间的温度或通风过度。在上述条件完成后，加入该受测电阻测电阻的额定电压，其加电压的过程以加电压90 分钟，再停止30 分钟为一循环，持续做1000 小时，完成后再置于恒温状态测量其阻值。计算变化率不得超出特性参数所定的各类电阻标准。
First, fix the test resistors in the measuring clip and arrange them in a way that does not affect the temperature or excessive ventilation between them. After completing the above conditions, add the rated voltage of the measured resistor. The process of applying voltage is to apply voltage for 90 minutes, then stop for 30 minutes as a cycle, and continue for 1000 hours. After completion, place it in a constant temperature state to measure its resistance value. The calculated rate of change shall not exceed the various resistance standards determined by the characteristic parameters.
6.温度系数测试Temperature coefficient test
先将测试电阻测出在室温下t1=25℃的电阻值R1,在置入温度t2=125℃的树脂槽中约5 分钟,并同时量测其阻值R2,并由下列公式求出该电阻的温度系数(T.C.R)是否在其所需的范围内。
First, measure the resistance value R1 of the test resistor at t1=25 ℃ at room temperature. Place it in a resin tank at t2=125 ℃ for about 5 minutes, and simultaneously measure its resistance value R2. Use the following formula to determine whether the temperature coefficient (T.C.R) of the resistor is within its required range.
7.温度循环实验Temperature cycling experiment
在-55℃时放置30 分钟，然后在+25℃时放置15 分钟，然后在+125℃时放置30 分钟。然后在+25℃时放置5 分钟，共循环5 次。如下表所示：
Leave at -55 ℃ for 30 minutes, then at+25 ℃ for 15 minutes, and finally at+125 ℃ for 30 minutes. Then let it stand at+25 ℃ for 5 minutes and cycle 5 times in total. As shown in the table below:
|
循环循序 Cycle in sequence |
温度 Temperature |
放置时间 Standing Time |
|
1 |
-55℃ |
30 分钟 |
|
2 |
+25℃ |
15 分钟 |
|
3 |
+125℃ |
30 分钟 |
|
4 |
+25℃ |
15 分钟 |
8.耐温负荷实验Temperature resistance load test
电阻在70±2℃恒温箱中施加额定电压或[敏感词]工作电压（取小者）1000 小时，以施压1.5 小时断电0.5 为一个循环。完成后再置于恒温状态测量其阻值。计算变化率不得超出特性参数所定的各类电阻标准。
Apply the rated voltage or maximum operating voltage (whichever is the minimum) to the resistor in a constant temperature box at 70 ± 2 ℃ for 1000 hours, and cut off power for 0.5 hours after applying pressure for 1.5 hours as one cycle. After completion, measure its resistance by placing it in a constant temperature state. The calculated rate of change shall not exceed the various resistance standards determined by the characteristic parameters.
E-mail:twj@twjohm.com
