RCH www.vishay.com Vishay Sfernice Power Resistor, for Mounting onto a Heatsink Thick Film Technology FEATURES 5 W to 50 W High power rating High overload capabilities up to 2500 V RMS Wide resistance range from 0.24 to 1 M High thermal capacity up to 0.8 C/W Easy mounting Reduced size and weight DESIGN SUPPORT TOOLS click logo to get started 6 High insulation: 10 M Material categorization: for definitions of compliance Models please see www.vishay.com/doc 99912 Available Manufactured in cermet thick film technology, these power resistors exhibit remarkable characteristics and the series includes 4 types ranging from 5 W to 50 W. Designed to be mounted onto a heatsink, the resistors can bear high short time overloads and 3 types of terminations are available. The resistors are non inductive and are particularly suitable for high frequency operation and cut-out circuits. DIMENSIONS in millimeters RCH...R RCH...V 2 M2 RCH...S 6 H 6 6 W 2.1 3 4.8 S L P F 6 D 9 T MODEL RCH5 RCH10 RCH25 RCH50 L 16.6 19 28 47.8 W 9 11 14 15.5 H 16.4 20.6 27.5 29.5 P Leads Pitch 10.2 12.7 18.3 30.5 F Connection Pitch 11.3 14.3 18.3 39.7 T 12.5 15.9 19.8 21.4 S 5.357.7 8 D 2.4 2.4 3.2 3.2 Weight (g) 457 12 Note Tolerances unless stated: 0.3 mm Revision: 16-Nov-17 Document Number: 50006 1 For technical questions, contact: sferfixedresistors vishay.com 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 RCH www.vishay.com Vishay Sfernice STANDARD ELECTRICAL SPECIFICATIONS RESISTANCE RATED POWER TEMPERATURE TOLERANCE MODEL RANGE P COEFFICIENT SERIES 25 C % W ppm/C RCH 5 0.24 to 1M 5 1, 2, 5, 10 150, 250 E24 range RCH 10 0.24 to 1M 10 1, 2, 5, 10 150, 250 E24 range RCH 25 0.24 to 1M 25 1, 2, 5, 10 150, 250 E24 range RCH 50 0.24 to 1M 50 1, 2, 5, 10 150, 250 E24 range MECHANICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS Mechanical Protection Insulated case Dissipation and Associated Onto a heatsink Resistive Element Cermet Power Rating: Chassis Mounted 5 W to 50 W Substrate Alumina Unmounted 2 W to 5.5 W Connections Tinned copper alloy Temperature Coefficient 150 ppm/C 6 Insulation Resistance 10 M ENVIRONMENTAL SPECIFICATIONS Total Inductance 0.1 H Temperature Range -55 C to +125 C Climatic Category 55 / 125 / 56 IEC 60695-11-5 Flammability 2 applications 30 s separated by 60 s PERFORMANCE TESTS CONDITIONS REQUIREMENTS NF EN140000 CEI 115 1 Momentary Overload 2 Pr/5 s < (0.25 % + 0.05 ) U < 1.5 U S L NF EN140000 125 C CEI 68215 Test Na Rapid Temperature Change 5 cycles < (0.25 % + 0.05 ) -55 C to +125 C NF EN140000 CEI 115 1 Load Life < (0.5 % + 0.05 ) 1000 h Pr at +25 C 56 days RH 95 % Humidity (Steady State) < (0.5 % + 0.05 ) MIL-STD-202 Method 103 B and C RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR Resistance Values < 1 > 1 5 % Standard Tolerances 10 % Standard TCR 250 ppm/C 150 ppm/C Tolerance on Request 1 % to 2 % SPECIAL FEATURES MODEL RCH 5 RCH 10 RCH 25 RCH 50 Power Rating-Chassis Mounted 5 W 10 W 25 W 50 W Power Rating-Unmounted 2 W 2.5 W 4 W 5.5 W Thermal Resistance R 4.8 C/W 3.2 C/W 1.4 C/W 0.8 C/W th (j - c) Limiting Element Voltage (V ) 160 V 250 V 550 V 1285 V RMS Max. Overload Voltage (V ) 320 V 500 V 1100 V 2500 V RMS Dielectric Strength (V ) 50 Hz, 1 min RMS 2000 V 2000 V 3500 V 3500 V MIL-STD-202 Method 301 10 mA max. Critical Resistance 5120 6250 12 100 33 024 Revision: 16-Nov-17 Document Number: 50006 2 For technical questions, contact: sferfixedresistors vishay.com 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