Product - Specification 1st April 2003 ISSUE 2 TYPE LR25 SERIES Metal Film Fixed Resistor TYPE LR25 SERIES KEY FEATURES 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 coat of phenolic resin is followed by three coats of epoxy resin. All resistors are tested for value and tolerance. * Superior quality metal film resistors with 1% tolerance. Ideally suited for general purpose use. * 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. STOCKISTS: This product is not available in Distribution. Telephone Tyco Passive Product Support Team ++ 44 (0) 1793 572484 Page 1 of 3 Website - www.passives.tycoelectronics.com Email - passivesales@tycoelectronics.com Product - Specification 1st April 2003 ISSUE 2 TYPE LR25 SERIES SPECIFICATIONS Rated Power @ 70 C Resistance Range Min Max Tolerance Code letter Temperature Coefficient Selection Series Limiting Element Voltage Maximum Permitted Element Voltage Maximum Overload Voltage Max Intermittent Overload Voltage Operating Temperature Range Climatic Category Dielectric Strength Insulation Resistance Minimum Dry UNITS LR25 Watts Ohms Ohms % 0.25 1R0 10M 1 F 100 E24 ppm/C Volts Volts Volts Volts 10R 1M 1 F 100 E96 250 250 500 500 55 to +125 55/125/56 500 1000 C Volts Mohms DIMENSIONS STYLE LR25 L* D 5.6 0.3 2.3 0.2 * Length is measured in accordance with IEC 294. DERATING CURVE d (nom) 0.55 0.02 SURFACE TEMPERATURE RISE VS. LOAD MARKING The resistors are marked with a colour band code in accordance with IEC 62. MOUNTING The resistors are suitable for processing on automatic insertion equipment and cutting and bending machines. Telephone Tyco Passive Product Support Team ++ 44 (0) 1793 572484 Page 2 of 3 Website - www.passives.tycoelectronics.com Email - passivesales@tycoelectronics.com Product - Specification 1st April 2003 ISSUE 2 TYPE LR25 SERIES PACKAGING LR25 resistors are normally supplied taped in 'ammo' boxes of 5000 pieces. . 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 4.23 4.24 4.25.1 4.25.3 TEST REF 4.13 4.16 4.18 4.19 4.22 Long Term Tests (1% + 0.05 ohm) Climatic sequence Damp heat, steady state Endurance at 70 C Endurance at 125 C Short Term Tests (0.25% + 0.05 ohm) Overload Robustness of terminations Resistance to soldering heat Rapid change of temperature Vibration HOW TO ORDER Orders for these components should include the following information:Type, tolerance code letter and value e.g. LR25 J 24K This publication is issued to provide outline information only and (unless specifically agreed to the contrary by the Company in writing) is not to form part of any order or be regarded as a representation relating to the products or service concerned. We reserve the right to alter without notice the specification, design, price or conditions of supply of any product or service. Whilst Tyco Electronics Components products are of the very highest quality and reliability, all electronic components can occasionally be subject to failure. Where failure of a Tyco Electronics Components product could result in life threatening consequences, then the circuit and application must be discussed with the Company. Such areas might include ECG, respiratory and other medical and nuclear applications and any non fail-safe applications circuit. Telephone Tyco Passive Product Support Team ++ 44 (0) 1793 572484 Page 3 of 3 Website - www.passives.tycoelectronics.com Email - passivesales@tycoelectronics.com