SQP SQM SQZ SQH MPR SQS Coaxial High Alumina Ceramic Cement Fixed Wirewound Resistor CR-L 20W 500RJ 63x13x13mm
Overview
Cement resistors are power resistors that are heat and flame resistant.
Cement resistors are made to handle a large amount of power flowing through it with it being undamaged by heat or flames. If you are designing a circuit where a lot of current is being passed through a resistor and with it needing to be resistant to high heat and flame, cement resistors is a good design choice.
Typical power ratings range from 1W to 20W or more.
Tolerances from the stated resistance value are around 5 percent.
Main Specification
Packing: Bulk packing
Product type: SQP type , SQM type, SQZ type, SQH type, MPR type
Tolerance: ±5%, ±10%,
Resistance Value Range: 0.1 OHM-150K OHM
Testing Standard: JISC 5202
Non-inductive type also available.
Wirewound rods, value cut rods or fibre glass rods to be used.
Part Numbering
CR-(?) 5W 10K J
Type : CR-L,CR-M,CR-YA,CR-YB,CR-YC,CR-YD,CR-YD1,CR-YE,CR-YG,CR-V
Rated Power :2W,3W,5W,7W,10W,15W,20W,30W,40W
Nominal resistance value :E-12 Series / E-24 Series
Resistance tolerance : K ±10% , J ±5% , G ±2%
Power Rating
Rated power is maximum power which can be continuously loaded at specified ambient temperature
70℃,as Table-1;however when the ambient temperature exceeds 70℃,rated power should be determined
from the derating curve of Fig.1.
Table-1
Rated power
|
Maximum working voltage |
Maximum overload voltage |
Dielectric withstanding voltage |
Max Intermittence Overload Voltage |
1W | 350V | 700V | 1000V | 1500V |
2W | 350V | 700V | 1000V | 1500V |
3W | 500V | 1000V | 1000V | 1500V |
5W | 750V | 1500V | 1000V | 1500V |
7W | 1000V | 1500V | 1000V | 1500V |
10W | 1000V | 1500V | 1000V | 1500V |
15W | 1000V | 15000V | 1000V | 1500V |
20W | 1000V | 1500V | 1000V | 1500V |
30W | 1000V | 1500V | 1000V | 1500V |
40W | 1000V | 1500V | 1000V | 1500V |
Construction