水泥型电阻是把电阻体放入方形瓷器框内，用特殊不燃性耐热水泥充填密封而成。具有耐高功率、散热容易、稳定性高等特点。
类型 | 尺寸 ( mm ) | 阻值范围 |
sqz | l ± 1.5 | w ± 1 | h ± 1 | p ± 1.5 | p1 | p2 | p3 | p4 | h1 ± 1 | h2 ± 1 | sqz | rs+sqz |
5w | 25(28) | 10 | 10 | 9.5(15) | 4.2 | 2 | 5 | 1.5 | 25 | 10.5 | 0.1-130r | 131r-50k |
7w | 36 | 10 | 10 | 20 | 4.2 | 2 | 5 | 1.5 | 25 | 10.5 | 0.1-430 | 431r-50k |
10w | 48 | 10 | 10 | 32 | 4.2 | 2 | 5 | 1.5 | 25 | 10.5 | 0.2-470r | 471r-50k |
15w | 48 | 12.5 | 12 | 32 | 4.2 | 2 | 5 | 1.5 | 26 | 10.5 | 1r-600 | 601r-150k |
20-25w | 60 | 15 | 13 | 42 | 7 | 6 | 10 | 2.7 | 36 | 15.0 | 1r-1k | 1.1k-150k |
项 目 | 条 件 | 规 格 |
温度系数 | -30°c~ 200°c | ± 300ppm / °c |
短时间超负载 | 2.5 times of rated wattage for 5 sec. | ± 2 % |
额定负载 | rated wattage for 30 min. | ± 1 % |
耐电压 | 800 v ac 1 min. | no charge |
温度循环 | -30°c~ 85°cfor 5 cycles | ± 1 % |
负载寿命 | 70°con-off cycle 1000hrs. | ± 5 % |
耐湿寿命 | 40°c95% rh on-off cycle 500 hrs. | ± 5 % |
不燃性 | 16 times rated wattage for 5 min. | not flammed |
数量多另议