CEMENT FIXED RESISTOR
Self extinguishing
Excellent flame and moisture resistance
Extremely small sturdy and mechanically safe
Non-inductive types available for all Royal Ohm Cement Types
Too low or too high ohmic values on Wire-wound & Power Film type can be supplied on a case to
case basis
Ordering Procedure: (Ex.: PRW 5W, 5%, 100 , B/B)
P
R
W
0
5
W
J
P
1
0
1
B
0
0
Resistor Type:
PRW0 = PRW; PRWA = PRWA;
PRWC = PRWC; PRM0 = PRM;
PRMA = PRMA; PRMB = PRMB;
PRS0 = PRS;
PRVA = PRVA;
PRVB = PRVB; PZ1A = PRZA-1;
PZ2A = PRZA-2; PZ3A = PRZA-3;
PRZC = PRZC; PRZD = PRZD;
PRT0 = PRT;
PRU0=PRU;
Wattage:
2W = 2W
3W = 3W
5W = 5W
7W = 7W
AW = 10W
FW = 15W
20 = 20W
25 = 25W
30 = 30W
40 = 40W
Resistance Value:
E-24 series: the 1
st
digit to denote
production type of the product:
W=Wire wound type
P=Power film type
The 2
nd
& 3
rd
digits are for the
significant figures of the resistance
and the 4
th
digit denotes number of
zeros following.
Decimal point is expressed by:
“J”- 0.1, “K”- 0.01, “L”- 0.001
Ex.
4 7 ~ W47J
Tolerance:
J = ±5%,
K = ±10%
Packing Type:
B =Bulk / Box
Packing Qty:
0 = for Bulk / Box
packing
Special Feature:
Temperature coefficient
Short-time overload
Dielectric withstanding voltage
Terminal strength
Solderability
Temperature cycling
Humidity (Steady State)
Load life in humidity
< 20 : ±400PPM/°C;
R/R
20 : ±350PPM/°C
0 = Standard product
I = Non-Inductive
±(5.0% + 0.05 ), with no evidence of mechanical damage.
No evidence of flashover, mechanical damage, arcing or insulation breakdown.
No evidence of mechanical damage.
Min. 95% coverage
R/R
R/R
±(2.0% + 0.05 ), with no evidence of mechanical damage.
±(5.0% + 0.05 ), with no evidence of mechanical damage.
For Wire-wound range, the R/R is ±5%
For Power film range, <100K , the R/R is ±5%
For Power film range, 100K , the R/R is ±10%
Load life
For Wire-wound range, the R/R is ±5%
For Power film range, <100K , the R/R is ±5%
For Power film range, 100K , the R/R is ±10%
Resistance to soldering heat
R/R ±(1.0% + 0.05 ), with no evidence of mechanical damage.
* For complete details, please see Page 69.
2005 - 2006
Page 31
测试/测量
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