Cement Resistor
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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 | |
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