CURRENT SENSE/LOW OHM CERAMIC ENCASED TYPE TM BR Alloy Resistance Element Preformed For Low Inductance SERIES CERAMIC ENCASED Alloy Resistance Wire / Strip Spot Welded to Copper Terminal Slim Type Metal Plate Type Low Inductance Inorganic Fire Retardant Encapsulant Fire Retardant Ceramic Case Tin Plated Copper Terminals PHYSICAL CONFIGURATION FRONT VIEW L PROFILE/SIDE VIEW FRONT VIEW W L TM FRONT VIEW L TM H PROFILE/SIDE VIEW TM 8.0+1.0 15.0+2.0 5.0+1.0 d P+1.0 Resistance Measurement Point P+1.0 Resistance Measurement Point P+1.0 TYPE BR-S TYPE BR- HTR TYPE POWER RATING at 70C L +1 BR-2 2W 14.0 3.0 TYPE BR-P DIMENSIONS (mm) W H d +1 +1 +0.05 4.5 3.5+0.5 5.0+0.5 5.0+1.0 Resistance Measurement Point P +1 8.5 0.6/0.8 9.0 RESISTANCE TYPICAL RANGE WT. PER min max PC [gms] R10 R68 1.5 BR-3 3W 15.0 5.0 13.0 0.6/0.8 9.0 R10 R68 2.2 BR-5 5W 15.0 5.0 18.0 0.6/0.8 9.0 R10 1R0 3.4 BR-10 10W 26.5 5.0 18.0 R10 1R2 6.4 0.8 20.0 Notes : These resistors are available in a choice of 3 mounting configurations to suit the varied needs of different circuit designers. Type BR- and BR - P are 2 different preforming styles. Type BR - S has straight leads - MPC style and can be mounted flush with the PCB for rigid mounting. The measurement point at which the resistance value must be checked is clearly indicated in the diagram given above. The resistance values must be checked using 41/2 digit micro ohm meter with four wire system and insulated clips. BR CURRENT SENSE/LOW OHM CERAMIC ENCASED TYPE TM ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA Temperature rise chart Performance Requirements Resistance tolerance + 10% [K]; + 5% [J] Rated ambient temperature [ see derating curve] at 70C full power dissipation 150 Temperature rise (C) Test Dielectric withstanding voltage Max. R + [2% + R05] Insulation resistance > 1000 M [minimum] Temperature co-efficient + 350 ppm/C Temperature rise Refer temperature rise chart Short time overload Max R+ 2% Moisture Resistance Max R+ 3% Load life Max R+ 5% Ambient operating temperature range. -40C to +155C Flame test met UL Specifications have been satisfactorily 100 10W 5W 3W 2W Measuring Point 50 0 50 Load factor (%) 100 Rated Dissipation [%] DERATING CURVE 70C 120 100 80 40 0 40 80 120 160 200 240 275 Ambient Temperature [C] TYPICAL APPLICATION These low inductance and flame retardant resistors have evolved to become cost effective solutions for applications like the protection of the output transistor in audio visual equipment and current sensing in switching and linear power supplies. By providing low resistance value coupled with low inductance, the switching distortion with high frequency which affects the sound quality of audio equipment is minimised. The very nature of it's size and construction makes the BR series thin and light weight which translates into the saving of PCB space. 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 BR BR5 R15 K TOLERANCE RESISTANCE VALUE HTR TYPE SERIES Note : Types BR-2, 3 and 5 are available with choice of lead diameters - 0.6mm or 0.8mm. If this is not specified at the time of ordering, the device will be supplied with 0.8mm diameters leads.