USR 4-1414 Powertron * * * * * Resistances from 0.5Ohm to 100Ohms Power Rating to 25Watt Resistance Tolerances to 0.01% TCR to 1ppm/K Load Stability to 0.01% SPECIFICATIONS Type USR 4-1414 Resistance Range 0.5 to 100 Ohms Power rating free air 70C with heatsink 0.8 W 25 W Thermal Resistance Rthj-c Tolerances from 0.5 Ohms from 1.0 Ohms < 4.2 K/W 0.1% / 0.25% / 0.5% / 1% 0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1% Stability 0.01% Temperature Coefficient max. 5ppm/K (-55 to 155C) typ. 3ppm/K (-55 to 125C) upon request 1ppm/K (0 to 60C) Voltage Proof 1.5 kVDC Thermal EMF < 0.1V/K Operating Temperature Range -55 to 155C Resistor Material NiCr-Foil Substrate Al2O3 upon request: AlN Housing Plastic / Epoxy Connector Material Cu tinned Terminals 4 Ordering Information Part Number - Resistance - Tolerance - TCR USR 4-1414 0.5Ohms 0.5% 1ppm Document Number: 64220 Revision: 20-09-10 For technical questions, contact: powertron@vishaypg.com www.powertron.de 1 USR 4-1414 Powertron SPECIFICATIONS (continued) Temperature Coefficient 1500 1000 +5ppm/K -5ppm/K DR/R (ppm) 500 0 Nominal Spread 2.3ppm/K +4,4 ppm/K -500 Nominal DR/R Nominal Spread 2.3ppm/K -1000 -1500 -50 -25 50 25 Temperature (C) 100 75 125 Derating without Heatsink 120 Power (% from nominal power) Power (% from nominal power) 0 100 80 60 40 20 0 with Heatsink 120 100 80 60 40 20 0 50 70 85 100 115 130 145 155 25 Ambient Temperature (C) 50 85 100 115 130 145 155 Temperature of the backplate(C) Dimensions www.powertron.de 2 Dimension mm tol. (mm) inches tol. (inches) A 94.00 0.5 3.70 0.020 B 14.00 0.2 0.55 0.008 C 4.50 0.1 0.18 0.004 D O0.80 0.1 O0.03 0.004 E 6.30 0.2 0.25 0.008 F 1.50 0.2 0.06 0.008 G 14.00 0.2 0.55 0.008 For technical questions, contact: powertron@vishaypg.com Document Number: 64220 Revision: 20-09-10 Legal Disclaimer Notice Vishay Precision Group Disclaimer ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE. Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay Precision Group"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. The product specifications do not expand or otherwise modify Vishay Precision Group's terms and conditions of purchase, including but not limited to, the warranty expressed therein. Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms and conditions of purchase. To the maximum extent permitted by applicable law, Vishay Precision Group disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Information provided in datasheets and/or specifications may vary from actual results in different applications and performance may vary over time. Statements regarding the suitability of products for certain types of applications are based on Vishay Precision Group's knowledge of typical requirements that are often placed on Vishay Precision Group products. It is the customer's responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or by any conduct of Vishay Precision Group. The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay Precision Group products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay Precision Group for any damages arising or resulting from such use or sale. Please contact authorized Vishay Precision Group personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document No.: 63999 Revision: 27-Apr-11 www.vishaypg.com 1