resistors BLR ceramic case surface mount resistor EU features • Suitable to detect large current due to ultra low resistances • Flame retardant resistor in a ceramic case • All custom-made products • Automatic mounting is available • Products with lead-free terminations meet EU RoHS and China RoHS requirements dimensions and construction 1L & 2L Size Code Resistor Element L W Cement W Dimensions inches (mm) W2 H W1 1L –– .205±.019 (5.2±0.5) 2L .748±.039 .248±.019 .709±.019 (19±1.0) (6.3±0.5) (18±0.5) .760±.039 .323±.019 (19.3±1.0) (8.2±0.5) –– .118±.012 .236±.006 (3.0±0.03) (6.0±0.5) 3L Ceramic Case L1 .512±.019 .551±.039 .217±.019 (13±0.5) (14±1.0) (5.5±0.5) H T L .362 (9.2) t T –– .098±.039 (2.5±1.0) –– .012 (0.3) .118±.039 (3.0±1.0) W1 Electrode L1 3L Cement L W Resistor Element H t T Ceramic Case L1 W1 Electrode Heat Sink W2 ordering information New Part # BLR Type 1L N Power Rating 1L: 1W 2L: 2W 3L: 15W Termination Material N: No surface treatment TE Packaging TE: embossed plastic 1, 2: 1,000 pieces/reel 3: 750 pieces/reel 50L J Nominal Resistance 3 digits Resistance Tolerance J: ±5% K: ±10% Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 52 11/13/08 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com ceramic case surface mount resistor applications and ratings Part Designation Power Rating BLR1L 1W BLR2L 2W BLR3L 15W** T.C.R. (ppm/°C) Max. Resistance Range* ±100 8mΩ - 50mΩ Resistance Tolerance Rated Ambient Temperature Operating Temperature Range J: ±5% K: ±10% +70°C -40°C to +180°C 8mΩ - 50mΩ 8mΩ - 50mΩ * Please consult with us in advance about resistance value for custom-made products ** It is assumed to be used on aluminum circuit board environmental applications Derating Curve 100 % Rated Power 80 60 40 20 0 -40 -20 0 20 80 100 70 Ambient Temperature (°C) 40 60 120 140 160 180 Performance Characteristics Parameter Resistance T.C.R. Requirement ∆ R ±(%+0.05Ω) Limit Typical Within specified –– tolerance Within specified –– value Test Method 25°C Room temp. +100°C UP Cold Resistance ±5.0% ±2.0% -55°C, 1000 hours Heat Resistance ±5.0% ±2.0% +125°C, 1000 hours Moisture Resistance ±5.0% ±2.0% 40°C ± 2°C, Power rating x 1/10, 90% - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle Long Life ±5.0% ±2.0% 70°C ± 2°C, 1000 hours 1.5 hr ON, 0.5 hr OFF cycle Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/20/10 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 53 resistors BLR