V I S H AY I N T E R T E C H N O L O G Y, I N C . POWER METAL STRIP® RESISTORS WSHM2818 Power Metal Strip® Resistors, High Power (7 W), Low Value (Down to 0.001 Ω), Surface Mount KEY BENEFITS • • • • Improved thermal management incorporated into design The WSHM2818 resistor has 7 W power capability in a small 2818 size package Very low inductance (< 5 nH) Very low resistance values (1 mΩ to 100 mΩ) APPLICATIONS Automotive: • Electronic controls (engine controls, climate controls, anti-lock brakes, etc.) • Brushless DC motor controls (electronic power steering, electric: water pump, oil pump, air conditioning, etc.) • Electric and hybrid controls (battery management) Industrial: • Oil / gas well drilling (down hole test / measurement equipment) • Air conditioning / heat pump (inverter control) Consumer: • Air conditioning / heat pump (inverter control) • White goods (inverter control) Computer: • DC/DC converter, VRMs for servers • Power management / safety RESOURCES • Datasheet: WSHM2818 - www.vishay.com/doc?30188 • For technical questions contact [email protected] • Material categorization: For definitions please see www.vishay.com/doc?99912 One of the World’s Largest Manufacturers of Discrete Semiconductors and Passive Components PRODUCT SHEET 1/2 VMN-PT0284-1410 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 • Proprietary processing technique produces extremely low resistance values I S H AY I N T E R T E C H N O L O G Y, I N C . • All welded V construction • Very low inductance (< 5 nH) • Solid metal nickel-chrome or ® manganese-copper alloy resistive element with low TCR (< 20 ppm/°C) • Excellent frequency response to 50 MHz • Low thermal EMF (< 3 μV/°C) • AEC-Q200 qualified (1) • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912 POWER METAL STRIP RESISTORS WSHM2818 Power Metal Strip® Resistors, High Power (7 W), Note Low Value (Down to 0.001Flame Ω),retardance Surface Mount test may not be applicable to some resistor (1) technologies. STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL SIZE POWER RATING P70 °C W TOLERANCE ±% RESISTANCE VALUE RANGE WEIGHT (typical) g/1000 pieces WSHM2818 2818 7 (2) 1.0 0.001 to 0.1 167.8 Note (2) The WSHM2818 is rated at 7 W with maximum surface temperature of 180 °C. TECHNICAL SPECIFICATIONS PARAMETER Temperature coefficient UNIT RESISTOR CHARACTERISTICS ppm/°C ± 200 for 1 m to 5.99 m ± 75 for 6 m to 100 m Inductance nH <5 Operating temperature range °C -65 to +170 Maximum continuous current A (P/R)1/2 GLOBAL PART NUMBER INFORMATION Global Part Numbering: WSHM2818R1000FEA W S H M 2 RESISTANCE VALUE GLOBAL MODEL WSHM2818 8 L = m* R = Decimal 4L000 = 0.004 R0100 = 0.01 1 8 R 1 0 0 0 F E A TOLERANCE CODE PACKAGING CODE SPECIAL F = ± 1.0 % J = ± 5.0 % EA = Lead (Pb)-free, tape/reel EK = Lead (Pb)-free, bulk (Dash number) (up to 2 digits) From 1 to 99 as applicable WSHM2818 * Use “L” for resistance values < 0.01 www.vishay.com Vishay Dale Revision: 28-Apr-14 Document Number: 30188 1 For technical questions, contact: [email protected] DIMENSIONS in inches (millimeters) 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 L H a T b a Revision 28-Apr-14 W MODEL WSHM2818 RESISTANCE RANGE 0.001 to 0.1 DIMENSIONS l SOLDER PAD DIMENSIONS L W H T a b l 0.280 ± 0.010 (7.1 ± 0.25) 0.180 ± 0.010 (4.6 ± 0.25) 0.059 ± 0.010 (1.50 ± 0.25) 0.125 ± 0.010 (3.18 ± 0.25) 0.138 (3.5) 0.200 (5.1) 0.024 (0.61) PRODUCT SHEET Rated Power in % DERATING 120 100 80 60 2/2 VMN-PT0284-1410 40 NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 20