OVSF www.vishay.com Vishay Milwaukee Wirewound Resistors, Industrial Power, Tubular, Flat, Oval, Fixed, OVSF FEATURES • Terminal bands are spotwelded onto the insulated core and resistance-alloy wire is precisely wound onto the oval core • The wire is spotwelded to the terminal bands and then “locked” onto the core with a silicone or cement coating • Available as fixed and adjustable resistors (for adjustable Oval Resistor see www.vishay.com/doc?31836) • Wirewound • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912 STANDARD ELECTRICAL SPECIFICATIONS HISTORICAL MODEL GLOBAL MODEL POWER RATING W RESISTANCE RANGE TOLERANCE (1) ±% TERMINAL STYLE A OVSF0030 16-20 Oval 30 1.2 to 7.3K 5 OVSF0040 16-32 Oval 40 1.7 to 27K 5 A OVSF0055 16-56 Oval 55 2.4 to 85K 5 A OVSF0070 16-76 Oval 70 3.0 to 137K 5 A OVSF0095 16-96 Oval 95 4.1 to 171K 5 A Notes • Ratings are based on a temperature rise of 300 °C above an ambient of 40 °C. (1) Standard fixed resistance tolerance ± 5 %. Resistance values less than 1 and adjustable have ± 10 % tolerance. Closer tolerances available upon request. DERATING FOR GROUP INSTALLATIONS % OF SINGLE RATING NUMBER OF RESISTORS STACKED VERTICAL CHASSIS HORIZONTAL CHASSIS 2 3 4 80 70 65 75 60 50 Notes • Ratings are based on mounting on a steel panel 10" x 10" x 0.040". Derate by 29 % when mounting on non-heat conductive surface. DIMENSIONS in inches (millimeters) GLOBAL MODEL OVSF0030 OVSF0040 OVSF0055 OVSF0070 OVSF0095 Revision: 08-Oct-13 DISTANCE BETWEEN TERMINALS A L 2 (50.8) 2.75 (69.85) 4.25 (107.95) 5.5 (139.7) 6.75 (171.45) 1.25 (31.75) 2 (50.8) 3.5 (88.9) 4.75 (120.65) 6 (152.4) OVERALL LENGTH WEIGHT (TYP.) g = A + 0.625 (15.875) = A + 0.625 (15.875) = A + 0.625 (15.875) = A + 0.625 (15.875) = A + 0.625 (15.875) 15 24 37 45 60 Document Number: 31835 1 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 OVSF www.vishay.com Vishay Milwaukee TERMINAL STYLE in inches (millimeters) A D A C D C Type A B Type H B DIMENSIONS A (3/16" LUG) Width (A) 0.1875 (4.7625) H (1/4" SQC) 0.25 (6.35) Height (B) 0.375 (9.525) 0.625 (15.875) Dia. (C) 0.13 (3.302) 0.065 (1.651) Thickness (D) 0.02 (0.508) 0.032 (0.8128) MATERIAL SPECIFICATIONS Element Copper-nickel, nickel-chrome, iron-chrome-aluminum Core Steatite Coating High temperature silicone Standard terminals Nickel-iron Part marking Value, date code, MRC GLOBAL PART NUMBER INFORMATION Global Part Numbering example: OVSF0070137K0JHB00 (OVSF0070 137K 5 % 1/4SQC B) O V S F 0 SIZE MODEL COATING TYPE (2 digits) (1 digit) (1 digit) (4 digits) OV S= Silicone F= Fixed 0030 = 30 W 0095 = 95 W Available sizes: 0030 0040 0055 0070 0095 Revision: 08-Oct-13 0 7 VALUE (5 digits) 0 1 TOLERANCE (1 digit) J = ± 5.0 % R = Decimal K = Thousand K = ± 10 % R1500 = 0.15 1K500 = 1.5 k Check datasheet for available value range 3 7 K 0 J H B 0 0 TERMINAL (1 digit) PACKAGING (1 digit) SPECIAL (2 digits) A = 3/16" lug (3/16L) H = 1/4" single quick-connect (1/4SQC) B = Bulk 00 = Standard NI = Non-inductive NS = No strips and spacers Document Number: 31835 2 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay 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. Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. 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. Parameters provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. Material Category Policy Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (EEE) - recast, unless otherwise specified as non-compliant. Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU. Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21 conform to JEDEC JS709A standards. Revision: 02-Oct-12 1 Document Number: 91000