Metal Film Fixed Resistors Type LR Series Characteristics Electrical Type LR Series The resistive element comprises a thin film of nickel-chrome alloy evaporated onto a high thermal conductivity ceramic element. Metal end caps are force fitted to the element prior to spiralling to value. Tinned copper lead wires are welded to the end caps and the components are then coated. One LR0204 Rated Power @ 70C (W) 0.25 Resistance Range (Ohms) Min 1R0 10R Max 9R1 1M0 Tolerance (%) 1 1 Code Letter F F Temp. Coefficient (ppm/C) 100 100 Selection Series E24 E24 On Request E96 Limiting Element Voltage 200 Max Permitted Element Voltage 200 Max Overload Voltage 400 Max Intermittent Overload Voltage 500 Operating Temp. Range (C) Climatic Category Dielectric Strength (V) 500 Insulation Resistance Min Dry (Mohms) LR1L LR1 LR2 LR100 LR200 0.5 0.6 0.75 1 2 R10 1R0 10R 1M1 1R0 10R 10R R82 9R1 1M0 10M 1M0 1M0 1M0 5 1 1 22 0.5 1 1 22 0.5 1 1 55 1 2 1 5 1 5 0.5 J F F GG D F F GG D F F JJ F G F J F J D 200 100 50 100 100 25/50/100 25/50/100 E12 E24 E24 E24 E24 E24 E24 E96 E96 E96 E96 350 350 350 500 500 350 350 350 500 500 500 700 700 1000 1000 750 750 750 1000 1000 -55 to +155 55/155/56 700 700 700 700 700 1000 coat of phenolic resin is followed by three coats of epoxy resin. All resistors are tested for value and tolerance. Dimensions L Key Features Superior quality metal film resistors with 1% tolerance and temperature coefficients down to 50 ppm. 3 case sizes are available in 0.25, 0.6, 0.75W. The LR1L series is a low ohmic value range from 0.1 to 0.82 ohm. Ideally suited where low resistance and small size are required. Metal film resistors have excellent stability under load and severe environmental conditions. They exhibit very low noise current and voltage coefficients. They are available in a wide range of resistance values and are suitable for general purpose and precision applications. d D Style L* D d Nom l LR0204 3.2 0.2 1.7 0.2 0.45 25 LR1L 6.2 0.5 2.3 0.2 0.55 25 LR1 6.2 0.5 2.3 0.2 0.55 25 LR2 9.7 0.3 3.5 0.2 0.7 25 LR100 12.0 Max 5.0 Max 0.8 25 LR200 16.0 Max 5.5 Max 0.8 29 * Length is measured in accordance with IEC 294. Power Derating Curve 100 80 Rated Power (%) 60 40 20 0 0 20 40 60 70 80 100 120 125 Ambient Temperature (C) Literature No. 1773241 Issued: 03-08 Dimensions are shown for reference purposes only. Dimensions are in millimetres unless otherwise specified. Specifications subject to change. tycoelectronics.com passives.tycoelectronics.com Metal Film Fixed Resistors Type LR Series Temperature Rise above Ambient (C) Surface Temperature Rise Vs Load 100 LR1L LR1 80 LR2 60 LR0204 40 20 0 0 0 0.2 0.25 0.4 0.6 0.75 Power Dissipation (W) Mounting The resistors are suitable for processing on automatic insertion equipment and cutting and bending machines. Marking The resistors are marked with a colour band code in accordance with JIS C 0802. Packaging LR0204, LR1L and LR1 resistors are normally supplied taped in 'ammo' boxes of 4000 pieces. LR2 resistors are normally supplied taped in 'ammo' boxes of 1000 pieces. Other package styles on request. All tape specifications are in accordance with IEC 286-1. Performance Characteristics The evaluation of the performance characteristics is carried out with reference to IEC Specifications QC 400 000 and QC 400 100. TEST REF Long Term Tests (1% + 0.05 ohm) 4.23 Climatic sequence 4.24 Damp heat, steady state 4.25.1 Endurance at 70C 4.25.3 Endurance at 125C TEST REF Short Term Tests (0.25% + 0.05 ohm) 4.13 Overload 4.16 Robustness of terminations 4.18 Resistance to soldering heat 4.19 Rapid change of temperature 4.22 Vibration * For LR1L the limits are (5% + 0.1 ohm) and (1% + 0.05 ohm) respectively. All resistance values are measured at a distance of 12mm from the end cap. How to Order LR Common Part 1 F Style Tolerance Value J - 5% 100 ohm (100 ohms) 100R 0204 - 0.25W 1L - 0.5W LR - Metal Film Fixed Resistor 1 - 0.6W G - 2% 2 - 0.75W F - 1% 100 - 1W D - 0.5% 200 - 2W Literature No. 1773241 Issued: 03-08 Dimensions are shown for reference purposes only. Dimensions are in millimetres unless otherwise specified. Specifications subject to change. 100R 1K0 (1000 ohms) 1K0 100 K ohm (100,000 ohms) 100K tycoelectronics.com passives.tycoelectronics.com