CEMENT FIXED RESISTORS
•
•
•
•
•
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%, 100Ω, 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;
PRVA = PRVA;
PRS0 = PRS;
PRVB = PRVB; PZ1A = PRZA-1;
PZ2A = PRZA-2; PZ3A = PRZA-3;
PRZC = PRZC; PRZD = PRZD;
PRU0 = PRU;
PRT0 = PRT;
PDM0 = PDM; PRWI = PRWI
Wattage:
2W = 2W
3W = 3W
4W = 4W
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:
“J”- 0.1, “K”- 0.01, “L”- 0.001
Ex.
4Ω7 ~ W47J
Tolerance:
J = ±5%,
K = ±10%
Packing Type:
B =Bulk / Box
Packing Qty:
* More explanation on part no, please see details on pages 79-80.
0 = for Bulk / Box packing
Special Feature:
0 = Standard product
I = Non-Inductive
Temperature coefficient
Short-time overload
Dielectric withstanding voltage
Terminal strength
Solderability
Temperature cycling
Humidity (Steady
state)
Load life in humidity
< 20Ω: ±400PPM/°C;
≥
20Ω: ±350PPM/°C
∆R/R ≤
±(5.0% + 0.05Ω), 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 ≤
±(2.0% + 0.05Ω), with no evidence of mechanical damage.
∆R/R ≤
±(5.0% + 0.05Ω), with no evidence of mechanical damage.
For Wire-wound range; the
∆R/R
is ±5%
For Power film range: <100KΩ, the
∆R/R
is ±5%
For Power film range:
≥100KΩ,
the
∆R/R
is ±10%
Load life
For Wire-wound range: the
∆R/R
is ±5%
For Power film range: <100KΩ, the
∆R/R
is ±5%
For Power film range:
≥100KΩ,
the
∆R/R
is ±10%
Resistance to soldering heat
∆R/R
±(1.0% + 0.05Ω), with no evidence of mechanical damage.
*More details, please see pages 77-78.
2006 - 2007
Page 35
CEMENT FIXED RESISTORS
(4) PRZA-1, PRZA-2, PRZA-3, PRZC, PRZD Type
PRZA-1, PRZA-2, PRZA-3, PRZC, PRZD
PRZA-1, PRZA-2, PRZA-3
PRZC, PRZD
Recommendable Hole
Power Rating
at
70
o
C
Dimension (mm)
P
PRZA-1, PRZA-2, PRZA-3
5W
7W
PRZC, PRZD
9.5 / 15
22
10W
15W
32 / 35
32
20W
45
Page 38
2006 - 2007