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 Vishay Dale Power Metal Strip ® Surface-Mount Current Sensing Resistors INTRODUCTION Vishay’s Power Metal Strip® current sensing resistors combine superior performance in high-temperature applications with a wide range of package sizes and a choice of resistance values from 0.0002 Ω to 1 Ω. These patented, state-of-the-art products deliver overload capabilities equivalent to wirewound devices and temperature coefficients as low as 30 ppm/°C. Current sensing Power Metal Strip resistors allow control circuitry to monitor the level of current in a circuit by translating current into a voltage that can be monitored easily. The devices work by resisting the current flow in a circuit to a calibrated level, thus allowing a voltage drop to be detected and monitored by control circuitry. The low resistance values of Power Metal Strip resistors allow this function to be carried out with exceptional efficiency. RESOURCES • For technical questions contact [email protected] A WORLD OF SOLUTIONS PRODUCT OVERVIEW 1/8 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 VMN-PL0407-1512 www.vishay.com 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 Vishay Dale Global Model Power Rating Resistance Range (Ω) TCR Tolerance (ppm/ºC) 0.1 W 0.01 to 0.1 ± 75 0.5 %, 1 % L = 0.060 in. (1.52 mm) W = 0.030 in. (0.76 mm) H = 0.013 in. (0.33 mm) 0.125 W 0.005 to 0.0069 0.007 to 0.2 ± 110 ± 75 0.5 %, 1 % L = 0.080 in. (2.03 mm) W = 0.050 in. (1.27 mm) H = 0.013 in. (0.33 mm) WSL0603 WSL0805 WSL0603-18 Dimensions 0.2 W 0.01 to 0.1 ± 75 0.5 %, 1 % L = 0.060 in. (1.52 mm) W = 0.030 in. (0.76 mm) H = 0.013 in. (0.33 mm) 0.25 W 0.01 to 0.05 ± 75 0.1 % 0.5 %, 1% L = 0.126 in. (3.20 mm) W = 0.063 in. (1.60 mm) H = 0.025 in. (0.635 mm) 0.25 W 0.005 to 0.0069 0.007 to 0.2 ± 110 ± 75 0.1 % 0.5 %, 1% L = 0.080 in. (2.03 mm) W = 0.050 in. (1.27 mm) H = 0.013 in. (0.33 mm) 0.25 W 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.2 ± 275 ± 150 ± 110 ± 75 1% 1% 0.5 %, 1 % 0.5 %, 1 % L = 0.126 in. (3.20 mm) W = 0.063 in. (1.60 mm) H = 0.025 in. (0.64 mm) 0.4 W 0.01 to 0.1 ± 75 0.5 %, 1 % L = 0.060 in. (1.52 mm) W = 0.030 in. (0.76 mm) H = 0.013 in. (0.33 mm 0.5 W 0.01 to 0.05 ± 75 0.1 % 0.5 %, 1% L = 0.126 in. (3.20 mm) W = 0.063 in. (1.60 mm) H = 0.025 in. (0.635 mm) 0.5 W 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.2 ± 275 ± 150 ± 110 ± 75 1% 1% 0.5 %, 1 % 0.5 %, 1 % L = 0.126 in. (3.20 mm) W = 0.063 in. (1.60 mm) H = 0.025 in. (0.64 mm) 0.5 W 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.5 ± 275 ± 150 ± 110 ± 75 1% 1% 0.5 %, 1 % 0.5 %, 1 % L = 0.200 in. (5.08 mm) W = 0.100 in. (2.54 mm) H = 0.025 in. (0.64 mm) WSK1206 WSL0805-18 WSL1206 WSLP0603 WSK1206-18 WSL1206-18 WSL2010 WSLP0805 0.5 W 0.01 to 0.05 ± 75 0.5 %, 1 % L = 0.080 in. (2.03 mm) W = 0.050 in. (1.27 mm) H = 0.013 in. (0.33 mm) 1.0 W 0.0005, 0.00075, 0.0008 0.001 0.002 0.003, 0.004, 0.005 ± 600 ± 275 ± 225 ± 150 1% L = 0.060 in. (1.50 mm) W = 0.120 in. (3.05 mm) H = 0.015 in. (0.38 mm) 1.0 W 0.001 to 0.003 -275 -225 -150 1 %, 5 % L = 0.120 in. (3.05 mm) W = 0.060 in. (1.50 mm) H = 0.015 in. (0.381 mm) 1.0 W 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.05 ± 275 ± 150 ± 110 ± 75 1% 1% 0.5 %, 1 % 0.5 %, 1 % L = 0.126 in. (3.20 mm) W = 0.063 in. (1.60 mm) H = 0.025 in. (0.64 mm) 1.0 W 0.005 to 0.01 ± 110 ± 75 1 %, 5 % L = 0.080 in. (2.03 mm) W = 0.050 in. (1.27 mm) H = 0.013 in. (0.330 mm) 1.0 W 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.5 ± 275 ± 150 ± 110 ± 75 1% 1% 0.5 %, 1 % 0.5 %, 1 % L = 0.200 in. (5.08 mm) W = 0.100 in. (2.54 mm) H = 0.025 in. (0.64 mm) WSK0612 WSL0612 WSLP1206 WSLP0805-18 WSL2010-18 PRODUCT OVERVIEW 2/8 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 Applications • Cell phone battery fuel gages • Disk drive motor controls • DC/DC converters in cell phones, pagers • Li-Ion battery management • DC/DC converters in switching power supplies • VRMs in notebooks PCs • Disk drive motor controls • Automotive controls for body and powertrain VMN-PL0407-1512 www.vishay.com 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 Vishay Dale Global Model Power Rating Resistance Range (Ω) TCR Tolerance (ppm/ºC) 1.0 W 0.0005 to 0.00099 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.5 ± 400 ± 275 ± 150 ± 110 ± 75 1.0 W 0.01 to 0.5 1.0 W Dimensions Applications 1% 1% 1% 0.5 %, 1 % 0.5 %, 1 % L = 0.250 in. (6.35 mm) W = 0.125 in. (3.18 mm) H = 0.025 in. (0.64 mm) • Li-Ion battery management • DC/DC converters in switching power supplies • VRMs in notebooks PCs • Disk drive motor controls • Automotive controls for body and powertrain ± 75 0.5 %, 1 % L = 0.200 in. (5.08 mm) W = 0.100 in. (2.54 mm) H = 0.025 in. (0.64 mm) 0.01 to 0.5 ± 75 0.5 %, 1 % L = 0.250 in. (6.35 mm) W = 0.125 in. (3.18 mm) H = 0.025 in. (0.64 mm) 1.0 W 0.0005 to 0.00099 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.2 ± 350 ± 250 ± 75 ± 35 1% 0.5 %, 1 % 0.5 %, 1 % 0.5 %, 1 % L = 0.250 in. (6.35 mm) W = 0.125 in. (3.18 mm) H = 0.025 in. (0.64 mm) • DC/DC converters in switching power supplies • VRMs in notebooks, desktop PCs • Instrumentation 2.0 W 0.001 to 0.0019 0.002 to 0.0029 0.003 to 0.0039 0.004 to 0.0049 0.005 to 0.0099 0.01 to 1.0 ± 750 ± 600 ± 450 ± 300 ± 110 ± 75 1% 1% 1% 1% 0.5 %, 1 % 0.5 %, 1 % L = 0.455 in. (11.56 mm) W = 0.275 in. (6.98 mm) H = 0.095 in. (2.41 mm ) • DC/DC converters in switching power supplies • VRMs in notebooks, desktop PCs • Instrumentation • Automotive controls for body and powertrain WSL2512 WSLT2010-18 WSLT2512 WSK2512 WSR2 WSL1020 2.0 W 0.001 to 0.006 ± 175 0.5 %, 1 %, 5 % L = 0.200 in. (5.08 mm) W = 0.060 in. (1.50 mm) H = 0.015 in. (0.381 mm ) 2.0 W 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.01 ± 275 ± 150 ± 110 ± 75 1% 1% 0.5 %, 1 % 0.5 %, 1 % L = 0.200 in. (5.08 mm) W = 0.100 in. (2.54 mm) H = 0.025 in. (0.635 mm) 2.0 W 0.0005 to 0.00099 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.04 ± 400 ± 275 ± 150 ± 110 ± 75 1% 0.5 %, 1 % 0.5 %, 1 % 0.5 %, 1 % L = 0.250 in. (6.35 mm) W = 0.125 in. (3.18 mm) H = 0.025 in. (0.64 mm) 2.0 W 0.002 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.1 ± 275 ± 150 ± 110 ± 75 1% 0.5 %, 1 % 0.5 %, 1 % 0.5 %, 1 % L = 0.280 in. (7.10 mm) W = 0.165 in. (4.20 mm) H = 0.020 in. (0.50 mm) 3.0 W 0.0005 to 0.00099 0.001 to 0.0029 0.003 to 0.0049 0.005 to 0.0069 0.007 to 0.01 ± 400 ± 275 ± 150 ± 110 ± 75 1% 1% 0.5 %, 1 % 0.5 %, 1 % 0.5 %, 1 % WSLP2010 WSL2512-18 WSL2816 WSLP2512 PRODUCT OVERVIEW L = 0.250 in. (6.35 mm) W = 0.125 in. (3.18 mm) H = 0.025 in. (0.635 mm) 3/8 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 • High temperature (+275 ºC) • Automotive controls for body and powertrain • Down-hole oil well monitor / testing • Li-Ion battery management • DC/DC converters in switching power supplies • VRMs in notebooks PCs • Disk drive motor controls • Automotive controls for body and powertrain • Li-Ion battery management • DC/DC converters in switching power supplies • VRMs in notebooks, desktop PCs • Automotive controls for body and powertrain • Li-Ion battery management • DC/DC converters in switching power supplies • VRMs in notebooks, desktop PCs • Automotive controls for body and powertrain • Li-Ion battery management • DC/DC converters in switching power supplies • VRMs in notebooks PCs • Disk drive motor controls • Automotive controls for body and powertrain VMN-PL0407-1512 www.vishay.com 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 Vishay Dale Global Model Power Rating Resistance Range (Ω) TCR Tolerance (ppm/ºC) 3.0 W 0.0003, 0.0005, 0.001 0.002, 0.003 0.004, 0.005 ± 75 3.0 W 0.0003, 0.0005, 0.001 0.002, 0.003 0.004, 0.005 ± 75 1% L= 0.400 in. (10.1 mm) W = 0.260 in. (6.6 mm) H = 0.117 in. (3.0 mm) 3.0 W 0.001 to 0.0029 0.003 to 0.01 ± 75 ± 50 0.5 %, 1 % 0.5 %, 1 % L = 0.360 in. (9.14 mm) W = 0.370 in. (9.40 mm) H = 0.025 in. (0.64 mm) 3.0 W 0.0003, 0.0005, 0.001 0.002, 0.003, 0.004 ± 175 ± 75 1 %, 5 % L = 0.394 in. (10.0 mm) W = 0.205 in. (5.20 mm) H = 0.020 in. (0.50 mm) 3.0 W 0.0005 0.001, 0.002, 0.003, 0.004 ± 175 ± 75 1 %, 5 % L = 0.394 in. (10.0 mm) W = 0.205 in. (5.20 mm) H = 0.020 in. (0.50 mm) • High temperature (+275 ºC) • Automotive controls for EHPS / EPS / EPAS and brushless DC motors • Down-hole oil well monitor / testing 3.0 W 0.001 to 0.0019 0.002 to 0.0029 0.003 to 0.0039 0.004 to 0.0049 0.005 to 0.0099 0.01 to 0.2 ± 750 ± 600 ± 450 ± 300 ± 110 ± 75 1% 1% 1% 1% 0.5 %, 1 % 0.5 %, 1 % L = 0.455 in. (11.56 mm) W = 0.275 in. (6.98 mm) H = 0.095 in. (2.41 mm) • DC/DC converters in switching power supplies • VRMs in notebooks, desktop PCs • Instrumentation • Automotive controls for body and powertrain 0.002, 0.003 0.004, 0.005 ± 75 1% L = 0.272 in. (6.9 mm) W = 0.260 in. (6.6 mm) H = 0.117 in. (3.0 mm) 3.0 W 0.002, 0.003 0.004, 0.005 ± 75 1% L= 0.400 in. (10.1 mm) W = 0.260 in. (6.6 mm) H = 0.117 in. (3.0 mm) 5.0 W 0.0002 0.0003, 0.0005 0.001, 0.002, 0.003 ± 225 ± 175 ± 75 1 %, 5 % L = 0.591 in. (15.0 mm) W = 0.305 in. (7.75 mm) H = 0.020 in. (0.50 mm) • DC/DC converters in switching power supplies • VRMs in notebooks, desktop PCs • Automotive controls for EHPS / EPS / EPAS and brushless DC motors 5.0 W 0.0003, 0.0005 0.001, 0.002 0.003 ±175 1 %, 5 % L = 0.591 in. (15.0 mm) W = 0.305 in. (7.75 mm) H = 0.020 in. (0.50 mm) • High temperature (+275 ºC) • Automotive controls for EHPS / EPS / EPAS and brushless DC motors • Down-hole oil well monitor/testing 5.0 W 0.001 to 0.0019 0.002 to 0.0029 0.003 to 0.0039 0.004 to 0.0049 0.005 to 0.0099 0.01 to 0.3 ± 750 ± 600 ± 450 ± 300 ± 110 ± 75 1% 1% 1% 1% 1% 0.5 %, 1 % L = 0.455 in. (11.56 mm) W = 0.275 in. (6.98 mm) H = 0.095 in. (2.41 mm) • DC/DC converters in switching power supplies • VRMs in notebooks, desktop PCs • Instrumentation • Automotive controls for body and powertrain Dimensions Applications WSL2726 1% L = 0.272 in. (6.9 mm) W = 0.260 in. (6.6 mm) H = 0.117 in. (3.0 mm) WSL4026 • DC/DC converter in switching power supplies • Instrumentation • Automotive controls for EHPS / EPS / EPAS and brushless DC motors WSL3637 WSL3921 WSLT3921 WSR3 • DC/DC converters in switching power supplies • VRMs in notebooks, desktop PCs • Automotive controls for EHPS / EPS / EPAS and brushless DC motors WSLT2726 3.0 W WSLT4026 WSL5931 WSLT5931 WSR5 PRODUCT OVERVIEW ± 75 4/8 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 • High temperature (+275 °C) • DC/DC converter in switching power supplies • Instrumentation • Automotive controls for EHPS / EPS / EPAS and brushless DC motors VMN-PL0407-1512 www.vishay.com 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 Vishay Dale Global Model Power Rating Resistance Range (Ω) TCR Tolerance (ppm/ºC) 7.0 W 0.001 to 0.00599 0.006 to 0.1 ± 200 ± 75 5.0 W 9.0 W 0.002, 0.003, 0.004 0.0002, 0.0003, 0.0005, 0.001 ± 175 ± 75 ± 75 1 %, 5 % L = 0.394 in. (10.0 mm) W = 0.205 in. (5.20 mm) H = 0.020 in. (0.50 mm) 7.0 W 10.0 W 0.001, 0.002, 0.003 0.0002, 0.0003, 0.0005 ± 175 ± 75 1 %, 5 % L = 0.591 in. (15.0 mm) W = 0.305 in. (7.75 mm) H = 0.020 in. (0.50 mm) 5.0 W 7.0 W 0.002 0.0005, 0.001 ± 75 1 %, 5 % L = 0.272 in. (6.9 mm) W = 0.260 in. (6.6 mm) H = 0.117 in. (3.0 mm) 5.0 W 7.0 W 0.002 0.0005, 0.001 ± 75 1 %, 5 % L = 0.400 in. (10.1 mm) W = 0.260 in. (6.6 mm) H = 0.117 in. (3.0 mm) WSHM2818 Dimensions Applications • DC/DC converters in switching L = 0.280 in. (7.10 mm) power supplies • VRMs in notebooks, desktop PCs 1.0 %, 5.0 % W = 0.180 in. (4.60 mm) utomotive controls for EHPS / EPS / H = 0.059 in. (1.50 mm) max. • A EPAS and brushless DC motors WSLP3921 • DC/DC converters in switching power supplies • VRMs in notebooks, desktop PCs • Automotive controls for EHPS / EPS / EPAS and brushless DC motors WSLP5931 WSLP2726 • DC/DC converter in switching power supplies • Instrumentation • Automotive controls for EHPS / EPS / EPAS and brushless DC motors WSLP4026 Applications Industrial Automotive Telecom • • • • • • • • • • • • • Power supplies Power tools Bar code scanners HVAC Other current detection Traction controls Multimedia Climate controls Electronic power steering Electric/hybrid vehicles Consumer Goods Medical and Instrumentation • • • • • • • • • • • Home electronics White goods Gaming systems Lighting controls Video cameras Television Automotive • • • Engine controls Anti-lock brakes Airbag PRODUCT OVERVIEW Monitoring systems Defibrillators Implantables Electronic scales Diagnostic equipment Telecom • • • Cell phones Modems Pagers Base stations Bluetooth Switching circuits Military and Aerospace • • • • Guidance systems Satellites Missiles Surveillance equipment Computer • • • • • • DC/DC converter Disk drives Power supplies Graphic cards PCMCIA Li-Ion battery management 5/8 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 VMN-PL0407-1512 www.vishay.com 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 Vishay Dale Technical Information Very Low Ohmic Value (0.2 mΩ to 1 Ω) To maximize energy conversion efficiency and minimize power consumption, current sense resistors should be of the lowest resistance value possible (typically below 25 mΩ). The single Power Metal Strip resistor can achieve the same low ohmic values for which four to six conventional cermet chips or two or more conventional thin film chips are required. Single Power Metal Strip® Single Power Metal Strip Multiple Multiple ChipChip ® For maximizing the sensing performance and saving energy, the tolerance of the sense resistor must be ± 1 % or tighter. A 1 % tolerance allows designers to use a narrow resistance window when specifying sensing voltages. Another advantage of a 1 % or better tolerance is reduced response time to switching currents. The chart to the right shows that it takes a comparable thick film resistor almost three times longer than the Power Metal Strip to stabilize it’s sensing voltage. Voltage Source Source Voltage Stabilization Time (Average) Standardization Time (average) (µ Seconds) (µ seconds) Tight Tolerance (1 % Standard, 0.5 % and 0.1 % Available) 400 350 300 250 200 150 100 50 0 370 131 94 33 Thick Film 0-400 Power Metal Strip® 0-100 Switching Current mA Switching Current mA High-Temperature Capability (Up to +275 °C) Power Metal Strip® High-Temperature Capability Power Metal Strip® High-Temperature Capability When used in industrial and automotive applications, components may be exposed to high temperatures. The current sensing resistor must be capable of operating in high-temperature conditions with a minimal reduction (derating) of rated power. The Vishay Dale WSL (maximum temperature of 170 °C) and WSLT / WSR (maximum temperature of 275 °C) type resistors will withstand high temperatures much better than cermet chips. The chart to the right provides a high-temperature comparison for these device types. 100 90 WSL % Power % Power 80 70 WSLT & WSR 60 50 40 Thick Film 30 20 10 0 0 25 50 75 100 125 150 175 200 225 250 275 70 Temperature ºC Temperature ˚C The low TCR of Vishay Power Metal Strip resistors minimizes the resistance change caused by self heating and high-temperature environments. This chart illustrates the voltage of a 30 ppm/°C Vishay Power Metal Strip resistor compared to a typical 100 ppm/°C metal strip and 700 ppm/°C thick film chip. Switching Voltage Switching Voltageatat400 400 mA mA Low Temperature Coefficient of Resistance (TCR) (Down to 30 ppm/°C) 0.025 V 0.020 V 0.015 V 0.010 V Thick Film 0.005 V Typical Metal Strip Vishay Power Metal Strip® 25 °C 50 °C 70 °C Temperature Temperature PRODUCT OVERVIEW 6/8 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 VMN-PL0407-1512 www.vishay.com 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 Vishay Dale Low Thermal EMF (Below 3 μV/°C) Metal Alloy Thermal EMF vs. Copper μV/°C Evanohm +2 Cupron -45 Dissimilar metals, in contact with each other, produce a small voltage. This voltage varies with temperature and is therefore called a “thermal EMF” or “thermocouple effect.” The rate of change of voltage with temperature from an intermetallic junction is a function of the metallic combination and the polarity of the voltage produced. Virtually all resistors have intermetallic combinations and it is presumed they will eventually be connected to copper as a final intermetallic junction (circuit trace). Hence, copper is the typical reference metal. Manganin -3 Zeranin -1.3 Thermal EMF is an important consideration in low-value resistors used in DC circuits. Thermal EMF can be large enough, when compared to the expected signal, that it can result in significant sensing errors. Vishay’s Power Metal Strip current sensing resistors utilize resistance materials that have low thermal EMF characteristics (Below 3 μV/°C). V±V (–) V (–) (+) (–) (+) Nickel -22 Gold +0.2 Silver -0.2 Aluminum -4 (+) (–) (+) V = Voltage Drop V ±V = Voltage Drop (with (±V) thermal EMF effect) (no thermal EMF effect) Terminal Construction At resistance levels down to 1 mΩ and tolerances of 1 % or larger, a two-terminal construction is typically acceptable. Where better accuracy is required, Vishay recommends the use of the four-terminal type such as the WSK0612, WSK1206, WSK2512, WSL2726, WSL3637, or WSL4026. The four-terminal construction reduces terminal resistance, copper terminal TCR, and solder joint TCR. E1 I1 E1 I1 E2 I2 I2 E2 (E1 & E2 Voltage Connections, I1 & I2 Current Connections) High-Current Capability (More than 220 A) The maximum DC load current required by today’s applications is in excess of 200 A. Vishay’s Power Metal Strip current sensing resistors utilize solid metal resistance elements, which are capable of handling the highest load currents. PRODUCT OVERVIEW 7/8 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 VMN-PL0407-1512 www.vishay.com 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 Vishay Dale Multiple Package Sizes (0603 to 5931) MultiplePackage Packages Sizes (0603 to 5931) Multiple Sizes (0603 to 5931) 2818 (7 W) 5931 (10 W) Power Dissipation (Watts) Vishay’s Power Metal Strip resistors are available in more than 10 package sizes. Multiple package sizes give the customer the ability to minimize PCB space by utilizing a smaller component or lessen resistor temperature by utilizing a larger component for their current sense applications. 4527 (5 W) 4527 (3 W) 3921 (9 W) 2816 (2 W) 4527 (2 W) 3637 (3 W) high 2512 (3 W) 2512 (3 W) 2010 (2 W) 0805 (0.5 W) 1206 (1 W) Board Space Consumption 0603 (0.4 W) low Board Space Consumption High Power Density (Up to 222 W/in2) Vishay’s Power Metal Strip resistors have evolved to “High Power” WSL…-18, WSLP, WSR3, WSR5, and WSHM2818 type resistors. With the higher power capacity of the standard WSL and WSR2 type resistor series, the WSL…-18, WSLP, WSR3, WSR5, and WSHM2818 series are intended for high-power, current sensing applications. Specially selected materials and processing permit these high power ratings of up to 10 W. The WSL…-18, WSLP, WSR3, WSR5, and WSHM2818 resistors offer a high power-to-package size ratio while maintaining superior electrical characteristics. These high power ratings enable designers to use smaller PCBs, which in turn increases manufacturing speed and reduces raw material costs. WSL0805-18 250 240 230 210 200 WSL0612 WSLP0603 220 0.25 0.5 1 2 3 WSLP5931 WSLP3921 WSHM2818 WSR3 WSL2512-18 WSL1206-18 WSK1206-18 WSK1206 0.125 WSL2512 WSL2010-18 0 WSL2010 15 WSL1206 30 WSL0603 45 WSL0805 60 WSL0805-18 75 WSR2 90 WSLP2512 WSLP2010 100 WSLP2726 110 WSR5 120 WSL1020 130 WSK0612 WSLP1206 140 WSLP0805 Power Density (W/in2) Power Density (W/sq in) 150 5 7 9 10 Case Size in Watts Case Size in Watts PRODUCT OVERVIEW 8/8 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 VMN-PL0407-1512 www.vishay.com