Cement Resistor
Cement resistance standard book (Rx27-1- 7w- 6k8-J type)
|
Size (mm) |
One |
B |
C |
d |
Φd |
|
value |
10±1 |
9±1 |
35±1 |
85±2 |
0.68±0.05 |
|
style |
RX27-1 |
|
rated power |
7 watts |
|
Derating curve |
|
|
Rated voltage |
|
|
Maximum voltage |
500V |
|
Maximum overload voltage |
700V |
|
tolerance |
Joule (±5%) |
|
Resistance range |
6K8 |
|
range of working temperature |
-55℃〜+ 155℃ |
|
description |
Performance requirements |
testing method |
|
|
Resistance temperature
coefficient
|
TCR≤350ppm/℃ |
Test temperature
+ 20℃／ -55℃／ + 20℃／ + 125℃／ + 20℃
|
|
|
Short-term overload |
No visible damage, clearly marked |
2.5 times rated voltage or maximum overload voltage (lower limit) for 5 seconds |
|
|
Wiith fixed voltage |
No flashover or malfunction |
AC 700V for 1 minute |
|
|
Terminal strength |
Pull |
△ R≤ ± （1 ％ R + 0.05R）
No obvious damage
|
Φd0.68mm; load 20N 10s |
|
Winding |
Φd0.68mm; load 20N 900 |
||
|
Twisted |
3600 instead |
||
|
Anti-vibration |
△R≤±（1％+ 0.05R）
No obvious damage
|
3 directions, 2 hours each |
|
|
Solder heat resistance |
△ R≤ ± （1 ％ R + 0.05R）
Clear marks, no visible damage
|
350℃ 2mm from the body, 3 seconds |
|
|
Solderability |
At least 95% of the immersed surface must be covered with new solder and no defect buildup. |
235℃
2 mm from the body for 2 seconds
|
|
|
Temperature cycle |
△ R≤ ± （1 ％ R + 0.05R）
No obvious damage
|
-25 ／ + 155℃
5 cycles
|
|
|
humidity |
△ R≤ ± （5 ％ R + 0.05R）
No obvious damage
|
40℃95％RH
1344 hours
|
|
|
70℃
Load life
|
△R≤±（5％R + 0.1R）
No obvious damage, clearly visible
|
Rated voltage or maximum voltage 1.5 hours open for 0.5 hours close 70 degrees Celsius for 1000 hours |
|
