WK/WR Vishay Draloric Metal Oxide Resistors, High Power FEATURES * Rugged metal oxide film * Lead (Pb)-free solder contacts * Pure tin plating provides compatibility with lead (Pb)-free and lead containing soldering processes * Compatible with "Restriction of the use of Hazardous Substances" (RoHS) directive 2002/95/EC (issue 2004) * High power dissipation in small size (1 W/0207 size to 4 W/0922 size) * High temperature coating (up to 200 C), nonflammable STANDARD ELECTRICAL SPECIFICATIONS MODEL SIZE POWER RATING P70 C W LIMITING ELEMENT VOLTAGE MAX. V TEMPERATURE COEFFICIENT ppm/K TOLERANCE % RESISTANCE RANGE E-SERIES WK2 0207 1.0 500 50 1 4R7 - 1M0 96 WK2 0207 1.0 500 100 2 5 1R0 - 1M0 R18 - 10M 48 24 WK2 0207 1.0 500 200 5 0R18 - 10M 24 WR4 0414 2.0 500 200 WR5 0617 3.0 750 200 WK8 0922 4.0 750 200 2 5 2 5 2 5 1R0 - 1M0 R18 - 10M 1R0 - 100K R22 - 560K 1R0 - 68K R22 - 100K 48 24 48 24 48 24 Notes: * Coating: green * Marking: WR4 has color code marking does not have a TCR band. WR5 and WK8 are printed marked. For further information see appropriate catalog or web page. TECHNICAL SPECIFICATIONS PARAMETER UNIT WK2 WR4 WR5 WK8 W 1.0 2.0 3.0 4.0 V 500 500 750 750 Insulation Voltage (1 min) Veff > 500 > 500 > 500 > 500 Thermal Resistance (max) K/W 140 100 70 60 35 70 > 80 > 80 1.5 3.5 Rated Dissipation at 70 C Limiting Element Voltage (1) Insulation Resistance Voltage Coefficient Thermal Time Constant > 109 1/V < 10-7 s Category Temperature Range (2) C Terminal Strength, axial N Failure Rate Weight 14 20 - 55 to + 200 > 60 > 80 10-8/h g <1 0.2 0.7 Notes: (1) Rated Voltage P x R (2) For values < 10R the upper limiting temperature is 155 C. The power rating is correspondingly lower and can be caculated by R th www.vishay.com 156 For technical questions, contact: ff1aresistors@vishay.com Document Number: 20128 Revision: 14-Sep-07 WK/WR Metal Oxide Resistors, High Power Vishay Draloric PART NUMBER AND PRODUCT DESCRIPTION WK2-SERIES PART NUMBER: WK202070C1001FD500 W K 2 0 2 0 7 0 C 1 0 0 1 F D 5 MODEL/SIZE SPECIAL CHARACTER TCR VALUE TOLERANCE PACKAGING SPECIAL WK20207 0 = neutral C = 50 ppm/K B = 100 ppm/K A = 200 ppm/K 3 digit value 1 digit multiplier F=1% G=2% J=5% 22 = A2 25 = A5 D5 = R5 up to 2 digits 00 = standard MULTIPLIER 7 = *10-3 8 = *10-2 9 = *10-1 0 = *100 1 = *101 2 = *102 3 = *103 4 = *104 5 = *105 6 = *106 PRODUCT DESCRIPTION: WK2 50 1K0 1 % R5 WK2 50 1K0 1% R5 MODEL TCR RESISTANCE VALUE TOLERANCE PACKAGING (1) WK2 50 ppm/K 100 ppm/K 200 ppm/K 49K9 = 49.9 k 50R1 = 50.1 1K0 = 1.0 k 1% 2% 5% A2 A5 R5 PART NUMBER AND PRODUCT DESCRIPTION WK8-SERIES PART NUMBER: WK80922001000J5C00 W K 8 0 9 2 2 0 0 1 0 0 0 J 5 C MODEL/SIZE SPECIAL CHARACTER TCR VALUE TOLERANCE PACKAGING SPECIAL WK80922 0 = neutral 0 = standard 3 digit value 1 digit multiplier G=2% J=5% 5C = AC G1 = R1 up to 2 digits 00 = standard MULTIPLIER 7 = *10-3 8 = *10-2 9 = *10-1 0 = *100 1 = *101 2 = *102 3 = *103 4 = *104 5 = *105 PRODUCT DESCRIPTION: WK8 100R 5 % AC WK8 100R 5% AC MODEL RESISTANCE VALUE TOLERANCE PACKAGING (1) WK8 100R = 100 47K = 47 k 2% 5% AC R1 Note: (1) Please refer to table PACKAGING. Document Number: 20128 Revision: 14-Sep-07 For technical questions, contact: ff1aresistors@vishay.com www.vishay.com 157 WK/WR Metal Oxide Resistors, High Power Vishay Draloric PART NUMBER AND PRODUCT DESCRIPTION WR-SERIES PART NUMBER: WR404140A1001GFE00 W R 4 0 4 1 4 0 A 1 0 0 1 G F E MODEL/SIZE SPECIAL CHARACTER TCR VALUE TOLERANCE PACKAGING SPECIAL WR40414 WR50617 0 = neutral A = 200 ppm/K 3 digit value 1 digit multiplier G=2% J=5% 41 = A1 G73 51 = A1 G77 FE = RE G73 GP = RP up to 2 digits 00 = standard MULTIPLIER 7 = *10-3 8 = *10-2 9 = *10-1 0 = *100 1 = *101 2 = *102 3 = *103 4 = *104 5 = *105 6 = *105 PRODUCT DESCRIPTION: WR4 1K0 2 % RE WR4 1K0 2% RE MODEL RESISTANCE VALUE TOLERANCE PACKAGING (1) WR4 WR5 1K0 = 1.0 k 51R0 = 51.0 2% 5% A1 (G73) A1 (G77) RE (G73) RP Note: (1) Please refer to table PACKAGING. * The PART NUMBER shown above is to facilitate the unified part numbering system for ordering products. PACKAGING REEL MODEL BOX PIECES/BOX CODE MIN. ORDER QTY PACKAGING UNITS 5000 A5 1 2000 A2 1 2 1000 A1 2 RP 2 1000 A1 2 R1 2 500 AC 2 PIECES/REEL CODE MIN. ORDER QTY PACKAGING UNITS WK2 5000 R5 1 WR4 2500 RE WR5 1500 WK8 1000 DIMENSIONS 6 mm (1) DIMENSIONS [in millimeters] L1 L D MODEL d e B Notes: (1) 9 mm for WR5/WK8 D L L1max B d e WK2 2.5 - 0.5 6.3 - 0.5 8.0 53 1 0.6 7.5 WR4 4.1 - 0.5 12.0 - 1.5 16.0 73 1 0.8 15.0 WR5 6.0 - 0.5 16.5 - 1.5 20.0 77 1 0.8 17.5 WK8 9.0 - 0.5 20.0 - 1.5 24.0 77 1 0.8 22.5 * Taping in acc. with IEC60286-1 * D and L measured in acc. with IEC60294 * d according to IEC60301 www.vishay.com 158 For technical questions, contact: ff1aresistors@vishay.com Document Number: 20128 Revision: 14-Sep-07 WK/WR RATED POWER IN % Metal Oxide Resistors, High Power TEMPERATURE RISE IN C 300 WK8 250 WK2 200 WR5 WR4 150 80 WK2 WR4 WR5 WK8 60 50 20 0 1.0 2.0 3.0 4.0 WR 5 WR 4 WK 2 10 Secondary Conditions: 1 a) P b) u 70 C c) UMAX see diagram below d) ~ 10R 0.1 -5 10-4 10-3 10 10-2 PULSE RATING P O 40 80 120 160 200 240 280 320 360 AMBIENT TEMPERATURE IN C DERATING POWER RATING P [W] WK 8 0 70 POWER IN W TEMPERATURE RISE 100 - 55 5.0 1000 10 10-1 100 SQUARE PULSE t i [s] 103 WK 8 WR 5 102 WR 4 WK 2 101 Secondary Conditions: a) P P70 (permissible constant power at u = 70 C) 100 b) u 70 C c) UMAX see diagram below d) ~ 10R 10-1 10-4 10-3 10-5 10-2 PULSE RATING P P70 10 100 10-1 SQUARE PULSE t i [s] Secondary Conditions: - a) P MAX see diagram below b) See diagram below c) u 70 C 2000 WR 5/WK8 WR 4 WK 2 1000 0 10-5 10-4 10-3 10-2 10 10-1 100 SQUARE PULSE t i [s] MAX. PULSE VOLTAGE 130 WR4 120 WR5/WK8 110 100 CURRENT NOISE V/V POWER RATING P [W] 100 40 0 PULSE VOLTAGE UMAX [V] 120 100 0 NON-LINEARITY A3 [dB] Vishay Draloric 10 1 WR5/WK8 0.1 WR4 90 1K 10K NON-LINEARITY Document Number: 20128 Revision: 14-Sep-07 100K 1M 10M RESISTANCE VALUE IN 0.01 10K 100K CURRENT NOISE For technical questions, contact: ff1aresistors@vishay.com 1M 10M RESISTANCE VALUE IN www.vishay.com 159 WK/WR Metal Oxide Resistors, High Power Vishay Draloric PERFORMANCE CONDITIONS OF TEST REQUIREMENTS (1) 1000 hours at 70 C 1.5 hours "ON", 0.5 hours "OFF" WK2 = 1.5 % WK4/8 = 2.0 % WR4/5 = 5.0 % 1000 hours at 155 C without load 1% Short time overload 5 seconds at 2.5 x rated voltage or twice the limiting element voltage 0.25 % Rapid change between upper and lower category temperature 0.25 % Dry heat, damp heat cycle, cold, low air pressure 0.5 % Damp Heat Steady State IEC 60115-1 4.24, IEC 60068-2-3 56 days at 40 C and 93 % relative humidity 1.5 % Resistance to Soldering Heat IEC 60115-1 4.18, IEC 60068-2-20 10 seconds at 260 C solder bath temperature 0.25 % Tensile, bending and torsion 0.25 % 0.75 mm or 10 g, 10 Hz - 500 Hz 6 hours 0.25 % TEST Rated Dissipation at 70 C IEC 60115-1 4.25.1 Endurance at UCT IEC 60115-1 4.25.3 Overload Test IEC 60115-1 4.13 Thermal Shock IEC 60115-1 4.19, IEC 60068-2-14 Climatic Sequence IEC 60115-1 4.23 Robustness of Terminations IEC 60115-1 4.16 Vibration IEC 60115-1 4.22 Note: (1) Limiting for change of resistance at test APPLICABLE SPECIFICATIONS * CECC 40000 * EN 140000 IEC 60115-1 www.vishay.com 160 For technical questions, contact: ff1aresistors@vishay.com Document Number: 20128 Revision: 14-Sep-07 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. 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 herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. 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. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay 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 Number: 91000 Revision: 18-Jul-08 www.vishay.com 1