Type MS Bare Metal Element Resistors RIEDON Designed For Current Sensing or Shunt Applications Economical Bare Metal Resistance Element Special Lead Configuration Available Welded, Flameproof Construction Values from 0.005 Ohms, Tolerance to ±1% Low Inductance Riedon's bare element resistors were developed for current sensing and shunt applications. The resistance element is a special ribbon alloy, with the tinned copper or copper-clad steel leads welded to the element. This rugged construction offers a low-cost and reliable alternative to encapsulated designs. Since this design is so flexible, we list typical specifications and encourage your custom applications. Please contact us for an optimum design for your application. SPECIFICATIONS Power Rating Resistance ( 25°C ) Range Type Tolerances Inductance A Dimensions - ( in. ) * B Lead MS-1 1 0.005 to 0.1 ±1%, ±5% < 10nH 3.50 0.70 0.040 MS-3 3 0.005 to 0.1 ±1%, ±5% < 10nH 3.90 1.00 0.040 MS-5 5 0.005 to 0.05 ±1%, ±5% < 10nH 4.10 1.80 0.040 * Dimensions are for reference only as lengths will change for diferent resistance values. Consult Riedon for dimensions of your application. Temperature Coefficient of Resistance A 0.25 400 300 B 200 100 0 0.01 0.03 0.05 0.07 0.09 0.11 Resistance Value (W) 0.13 120 100 80 60 40 20 0 Special Configurations are Available 0 50 100 150 200 250 300 350 Ordering information: Part Number - Resistance - Tolerance - TCR Example: MS-3 - 0.05 Ohm - 1% - 75ppm Riedon Inc. REV 6/03 Resistance Measurment Points Power Derating Curve Power Level % TCR ( ±ppm/°C ) 500 300 Cypress Avenue Ambient Temperature °C Alhambra CA 91801 www.riedon.com (626) 284-9901 Fax: (626) 284-1704