RLS
SERIES
TM
PHYSICAL CONFIGURATION
SURFACE MOUNT
CERAMIC ENCASED TYPE
Power Ceramic Encased Resistors Current Sense
Industrial Applications
For the guidance of the Design Engineer, our applications laboratory has given the recommended Pad size and
Geometry which is shown below :-
IMPORTANT MOUNTING / ASSEMBLY DATA
POWER TYPE
1
a
b
A
D
E
B
SIDE VIEW
fCZ
PROFILE
HTR
TYPE
POWER
RATING
AT 25°C
RL1.5S 1.5W 10.0 17.0 3.5 0.8 5.0 4.0 R005 R10 0.3
RL3S 3W 14.0 20.0 5.5 0.8 8.0 6.5 R0045 R22 1.0
RL5S 5W 22.0 27.0 8.5 0.8 13.0 9.0 R0025 R39 2.8
A (MAX) B (+1.0) C (MAX) D (+0.5) E (+0.5) Z (+1.0)
DIMENSIONS (mm)
RESISTANCE
RANGE
min max
TYPICAL
WT. PER
PC [gms]
Resistance value checking to be done using 4½ digit micro ohm meter and insulated clips.
HTR
TYPE a
RL1.5S 4.0 9.5 13.0
RL3S 4.0 9.5 16.0
RL5S 4.0 16.0 23.5
bl
DIMENSIONS (mm)
Fire Proof
Ceramic Housing
Quartz Silica
Powder
Alloy Electrical
Resistance Ribbon
All Welded Construction
Tinned Copper
Terminals
RLS
ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA
Performance Requirements
Test
SURFACE MOUNT
CERAMIC ENCASED TYPE
TYPICAL APPLICATIONS
The introduction of these low ohm / current sense resistors with surface mounting has broadened the scope for
designers substantially as they fulfil a long standing demand for surface mount high power resistors for current
sense purposes.
ORDERING INFORMATION
TOLERANCE
RESISTANCE VALUE
HTR TYPE
SERIES
R047
RLS
RL3S
J
Note : Due to recent technological advances, the ceramic cases used may be steatite ceramic or corderite
ceramic or high alumina ceramic depending on the nature of the application. Hence the ceramic cases may be
off-white or variations of brown and variations of grey; colours which are inherent to these ceramic materials.
Resistance tolerance + 10% [K]; + 5% [J]; + 3%[H];
+ 2% [G]; + 1% [F]
at 25°C full power dissipation
Rated ambient temperature derated linearly to zero at 275°C
Insulation resistance > 1000 Mega Ohms
Short time overload 5 times rated wattage for 5 sec.
Ambient operating -40°C to + 155°C
temperature range
Temperature co-efficient + 60ppm/°C to + 550ppm/°C depending
of resistance on resistance value and power rating.
(Measured from - 55°C to + 125°C
referenced to + 25°C
TM
