SURFACE MOUNT CERAMIC ENCASED TYPE TM RLS Fire Proof Ceramic Housing SERIES POWER TYPE Alloy Electrical Resistance Ribbon Power Ceramic Encased Resistors Current Sense Industrial Applications Tinned Copper Terminals Quartz Silica Powder All Welded Construction PHYSICAL CONFIGURATION D A E Z fC B SIDE VIEW HTR TYPE PROFILE DIMENSIONS (mm) POWER RESISTANCE TYPICAL RATING WT. PER RANGE AT 25C A (MAX) B (+1.0) C (MAX) D (+0.5) E (+0.5) Z (+1.0) min max PC [gms] 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 IMPORTANT MOUNTING / ASSEMBLY DATA For the guidance of the Design Engineer, our applications laboratory has given the recommended Pad size and Geometry which is shown below :DIMENSIONS (mm) a 1 b HTR TYPE a b l RL1.5S 4.0 9.5 13.0 RL3S 4.0 9.5 16.0 RL5S 4.0 16.0 23.5 Resistance value checking to be done using 41/2 digit micro ohm meter and insulated clips. ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA Performance Requirements Test Resistance tolerance + 10% [K]; + 5% [J]; + 3%[H]; + 2% [G]; + 1% [F] Rated ambient temperature at 25C full power dissipation derated linearly to zero at 275C Insulation resistance > 1000 Mega Ohms Short time overload 5 times rated wattage for 5 sec. Ambient operating temperature range -40C to + 155C Temperature co-efficient of resistance + 60ppm/C to + 550ppm/C depending on resistance value and power rating. (Measured from - 55C to + 125C referenced to + 25C 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. 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. ORDERING INFORMATION RLS RL3S R047 J TOLERANCE RESISTANCE VALUE HTR TYPE SERIES RLS SURFACE MOUNT CERAMIC ENCASED TYPE TM