WPA-B-C LITTELFUSE | Alldatasheet
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Current Sense Resistor Datasheet © 2024 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 10/29/24 Two-Terminal Surface Mount Resistor WPA/B/C Series Littelfuse WPA/B/C Series is low Ohm current sense resistor, designed with long stability, durability, excels at heat dissipation. It is a metal plate construction with low profile.
Description
■ Power rating up to 3 W ■ Tolerance down to ±0.5% ■ Small size ■ High voltage Features & Benefits ■ Power management ■ Low ESL Application RoHS Pb Web Resources Download ECAD models, order samples, and find technical recources at www.littelfuse.com
Current Sense Resistor Datasheet © 2024 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 10/29/24 Two-Terminal Surface Mount Resistor WPA/B/C Series Electrical Specifications Littelfuse Series Part Number Size Resistance Value Power Rating (Watt) TCR (ppm / °C) Standard Package QuantityInch mm Ro (mΩ) Rt (%) WPA WPA1206GLR001FYR 1206 3216 1 ±1 .0% 1,0 ±150 4000 WPA WPA1206GLR002FYR 1206 3216 2 ±1 .0% 1,0 ±150 4000 WPA WPA1206GLR003FYR 1206 3216 3 ±1 .0% 1,0 ±150 4000 WPA WPA1206DLR004FYR 1206 3216 4 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR005FYR 1206 3216 5 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR005DYR 1206 3216 5 ±0.5% 1,0 ±75 4000 WPA WPA1206DLR006FYR 1206 3216 6 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR007FYR 1206 3216 7 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR008FYR 1206 3216 8 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR009FYR 1206 3216 9 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR010FYR 1206 3216 10 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR011FYR 1206 3216 11 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR012FYR 1206 3216 12 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR013FYR 1206 3216 13 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR014FYR 1206 3216 14 ±1 .0% 1,0 ±75 4000 WPA WPA1206DLR015FYR 1206 3216 15 ±1 .0% 1,0 ±75 4000 WPB WPB2512GL0M50FWR 2512 6432 0.5 ±1 .0% 2 ±150 3000 WPB WPB2512GL0M75FWR 2512 6432 0.75 ±1 .0% 2 ±150 3000 WPB WPB2512RLR001FYR 2512 6432 1 ±1 .0% 2 ±100 4000 WPB WPB2512RL1M50FYR 2512 6432 1. 5 ±1 .0% 2 ±100 4000 WPB WPB2512QLR002FYR 2512 6432 2 ±1 .0% 2 ±50 4000 WPB WPB2512QLR003FYR 2512 6432 3 ±1 .0% 2 ±50 4000 WPB WPB2512QLR004FYR 2512 6432 4 ±1 .0% 2 ±50 4000 WPB WPB2512QLR005FYR 2512 6432 5 ±1 .0% 2 ±50 4000 WPB WPB2512QLR006FYR 2512 6432 6 ±1 .0% 2 ±50 4000 WPB WPB2512QLR007FYR 2512 6432 7 ±1 .0% 2 ±50 4000 WPB WPB2512QLR008FYR 2512 6432 8 ±1 .0% 2 ±50 4000 WPB WPB2512QLR009FYR 2512 6432 9 ±1 .0% 2 ±50 4000 WPB WPB2512QLR010FYR 2512 6432 10 ±1 .0% 2 ±50 4000 WPB WPB2512QLR011FYR 2512 6432 11 ±1 .0% 2 ±50 4000 WPB WPB2512QLR012FYR 2512 6432 12 ±1 .0% 2 ±50 4000 WPB WPB2512QLR013FYR 2512 6432 13 ±1 .0% 2 ±50 4000 WPB WPB2512QLR014FYR 2512 6432 14 ±1 .0% 2 ±50 4000 WPB WPB2512QLR015FYR 2512 6432 15 ±1 .0% 2 ±50 4000 WPB WPB2512QLR016FYR 2512 6432 16 ±1 .0% 2 ±50 4000 WPB WPB2512QLR018FYR 2512 6432 18 ±1 .0% 2 ±50 4000 WPB WPB2512QLR020FYR 2512 6432 20 ±1 .0% 2 ±50 4000 WPB WPB2512QLR021FYR 2512 6432 21 ±1 .0% 2 ±50 4000 WPB WPB2512QLR022FYR 2512 6432 22 ±1 .0% 2 ±50 4000 WPB WPB2512QLR024FYR 2512 6432 24 ±1 .0% 2 ±50 4000 WPB WPB2512QLR027FYR 2512 6432 27 ±1 .0% 2 ±50 4000 WPB WPB2512QLR028FYR 2512 6432 28 ±1 .0% 2 ±50 4000 WPB WPB2512QLR030FYR 2512 6432 30 ±1 .0% 2 ±50 4000 WPB WPB2512QLR033FYR 2512 6432 33 ±1 .0% 2 ±50 4000 WPB WPB2512QLR034FYR 2512 6432 34 ±1 .0% 2 ±50 4000 WPB WPB2512QLR036FYR 2512 6432 36 ±1 .0% 2 ±50 4000 WPB WPB2512QLR039FYR 2512 6432 39 ±1 .0% 2 ±50 4000 WPB WPB2512QLR043FYR 2512 6432 43 ±1 .0% 2 ±50 4000 WPB WPB2512QLR047FYR 2512 6432 47 ±1 .0% 2 ±50 4000 WPB WPB2512QLR050FYR 2512 6432 50 ±1 .0% 2 ±50 4000 WPB WPB2512QLR051FYR 2512 6432 51 ±1 .0% 2 ±50 4000 WPB WPB2512QLR056FYR 2512 6432 56 ±1 .0% 2 ±50 4000
Current Sense Resistor Datasheet © 2024 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 10/29/24 Two-Terminal Surface Mount Resistor WPA/B/C Series Electrical Specifications Note: Resistors are available in steps of 1 mOhm. Ratings not indicated in the above table may be available on request Littelfuse Series Part Number Size Resistance Value Power Rating (Watt) TCR (ppm / °C) Standard Package QuantityInch mm Ro (mΩ) Rt (%) WPC WPC2512GL0M50FWR 2512 6432 0.5 ±1 .0% 3 ±150 3000 WPC WPC2512GL0M75FWR 2512 6432 0.75 ±1 .0% 3 ±150 3000 WPC WPC2512RLR001FWR 2512 6432 1 ±1 .0% 3 ±100 3000 WPC WPC2512QLR002FWR 2512 6432 2 ±1 .0% 3 ±50 3000 WPC WPC2512QLR003FWR 2512 6432 3 ±1 .0% 3 ±50 3000 WPC WPC2512QLR004FWR 2512 6432 4 ±1 .0% 3 ±50 3000 WPC WPC2512QLR005FYR 2512 6432 5 ±1 .0% 3 ±50 4000 WPC WPC2512QLR006FYR 2512 6432 6 ±1 .0% 3 ±50 4000 WPC WPC2512QLR007FYR 2512 6432 7 ±1 .0% 3 ±50 4000 WPC WPC2512QLR008FYR 2512 6432 8 ±1 .0% 3 ±50 4000 WPC WPC2512QLR009FYR 2512 6432 9 ±1 .0% 3 ±50 4000 WPC WPC2512QLR010FYR 2512 6432 10 ±1 .0% 3 ±50 4000 WPC WPC2512QLR011FYR 2512 6432 11 ±1 .0% 3 ±50 4000 WPC WPC2512QLR012FYR 2512 6432 12 ±1 .0% 3 ±50 4000 WPC WPC2512QLR013FYR 2512 6432 13 ±1 .0% 3 ±50 4000 WPC WPC2512QLR014FYR 2512 6432 14 ±1 .0% 3 ±50 4000 WPC WPC2512QLR015FYR 2512 6432 15 ±1 .0% 3 ±50 4000 WPC WPC2512QLR016FYR 2512 6432 16 ±1 .0% 3 ±50 4000 WPC WPC2512QLR018FYR 2512 6432 18 ±1 .0% 3 ±50 4000 WPC WPC2512QLR020FYR 2512 6432 20 ±1 .0% 3 ±50 4000 WPC WPC2512QLR021FYR 2512 6432 21 ±1 .0% 3 ±50 4000 WPC WPC2512QLR022FYR 2512 6432 22 ±1 .0% 3 ±50 4000 WPC WPC2512QLR024FYR 2512 6432 24 ±1 .0% 3 ±50 4000 WPC WPC2512QLR027FYR 2512 6432 27 ±1 .0% 3 ±50 4000 WPC WPC2512QLR028FYR 2512 6432 28 ±1 .0% 3 ±50 4000 WPC WPC2512QLR030FYR 2512 6432 30 ±1 .0% 3 ±50 4000 WPC WPC2512QLR033FYR 2512 6432 33 ±1 .0% 3 ±50 4000 WPC WPC2512QLR034FYR 2512 6432 34 ±1 .0% 3 ±50 4000 WPC WPC2512QLR036FYR 2512 6432 36 ±1 .0% 3 ±50 4000 WPC WPC2512QLR039FYR 2512 6432 39 ±1 .0% 3 ±50 4000 WPC WPC2512QLR043FYR 2512 6432 43 ±1 .0% 3 ±50 4000 WPC WPC2512QLR047FYR 2512 6432 47 ±1 .0% 3 ±50 4000 WPC WPC2512QLR050FYR 2512 6432 50 ±1 .0% 3 ±50 4000 WPC WPC2512QLR051FYR 2512 6432 51 ±1 .0% 3 ±50 4000 WPC WPC2512QLR056FYR 2512 6432 56 ±1 .0% 3 ±50 4000
Current Sense Resistor Datasheet © 2024 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 10/29/24 Two-Terminal Surface Mount Resistor WPA/B/C Series Temperature De-rating Curve Storage / Environment Conditions Time Temperature TP TL TS(max) TS(min) tP tL tS time to peak temperature PreheatPreheat Ramp-upRamp-up Ramp-downRamp-dow Critical Zone TL to TP Critical Zone TL to TP Profile Feature Pb-Free Assembly Average Ramp-Up Rate (Tsmax to Tp) 3 ºC / second max Preheat Temperature Minimum (Tsmin) 150 ºC Temperature Maximum (Tsmax) 200 ºC Time (Tsmin to (Tsmax) 60–180 seconds Time maintained above Temperature Minimum (TL) Time (tL) 217 ºC 60–150 seconds Peak T emperature (TP) 260 +0 ºC Time within 5 ºC of Actual Peak T emperature (tp) 20–40 seconds Ramp-Down Rate 6 ºC / second Maximum Time 25 ºC to Peak T emperature 8 minutes Maximum Soldering Parameters –Wave Soldering Products should be stored under the following environmental conditions. T emperature: +5 to +35 °C Humidity: 45 to 85% relative humidity Moisture Sensitivity Level: 1, J-STD-020 Do not keep products in environments where they may be subject to particulate contamination or harmful gases such as sulfuric acid or hydrogen chloride as it may cause oxidization on electrodes, resulting poor solderability. Products should be stored in a space that does not expose to high temperatures, vibration, or direct sunlight. Products should be stored in the original airtight packaging until use. -55 0 100 Ambient Temperature (ºC) Rated Power (%) 70 80 120 160 170 200
Current Sense Resistor Datasheet © 2024 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 10/29/24 Two-Terminal Surface Mount Resistor WPA/B/C Series T est Procedure Specifications ESD HBM, 100pF , 1 .5k ohms Repetition: 5 times Component Classification: 5C (25KV) ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Load Life (Operational Life) Test Temperature: 125°C Applied voltage: rated power (derated Power will be required if temp exceeds the derating point of part) Test Period: 1,000 hours (condition D) ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Biased Humidity Test conditions: 85°C and 85% RH 10% of rated power Test Period 1,000 hours ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. T emp. Cycling (Thermal Shock) Repeat 1,000 cycles as follows: -55°C for 30 minutes 125°C for 30 minutes Transition time of 1 minute max ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. High T emp. Exposure (Storage) Test Temp 125°C Test Period: 1,000 hours No Electrical Load ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Resistance to soldering heat Condition B (Solder dip, no pre-heat) 260°C ±1 .0% Parts must meet initial electrical specs. Resistance to Solvents 3 minute soak 2-3 ounce force 10 strokes/repetition 3 repetitions Appearance: Without distinct damage, and the marking shall be legible. T erminal Strength (SMD) Applied force based on part size ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Flammability UL -94 V-0 or V-1 are acceptable Electrical test not required V-0 burning less than 10 seconds or V-1 burning less than 30 seconds Flame Retardance Mounted parts subjected to voltages from 9.0 to
32 VDC (current clamped up to 500A)
No Flame when full automotive battery potential is applied. Vibration Frequency: 10-2,000 Hz Acceleration: 5G Test duration: 20 minutes, 12 cycles ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Mechanical Shock Force: 100G peak Test duration: 6 ms Half-sine waveform Velocity: 12.3ft/sec ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Board Flex 90 mm span between fulcrums 2 mm bend 60 seconds minimum holding time ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Solderability Non-activated flux dip: 5-10 seconds SAC solder dip: 5 seconds at 245°C A new solder shall cover minimum of 95%. Reliability Specifications
Current Sense Resistor Datasheet © 2024 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 10/29/24 Two-Terminal Surface Mount Resistor WPA/B/C Series Dimensions Recommended Land Pattern All dimensions in mm Part Number W L T A WPA1206 R001 0.90±0.20 0.70±0.30WPA1206 R002-R005 0.80±0.20 WPA1206 R006-R015 Part Number P W D Loading WPA1206 1 .20mm 1 .84mm 1 .80mm 1 .0 W WPB2512 0M50, 0M75, R001, 1M50 1 .50 mm 3.57 mm 2.95 mm 2.0 W WPB2512 R002~R056 3.18 mm 3.57 mm 2.11 mm 2.0 W WPC2512 0M50~0M75 1 .50 mm 3.57 mm 2.95 mm 3.0 W WPC2512 R001~R056 3.18 mm 3.57 mm 2.11 mm 3.0 W Packaging Part Number Halogen Free Packaging Option Quantity Quantity & Packaging Codes WPA1206 Ye s Tape and Reel 4000 YR WPB2512 0M50, 0M75 Ye s Tape and Reel 3000 WR WPB2512 1M50, R001~R056 Ye s Tape and Reel 4000 YR WPC2512 0M50, 0M75 Ye s Tape and Reel 3000 WR WPC2512 R001~R004 Ye s Tape and Reel 3000 WR WPC2512 R005~R056 Ye s Tape and Reel 4000 YR
Current Sense Resistor Datasheet © 2024 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 10/29/24 Two-Terminal Surface Mount Resistor WPA/B/C Series Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at http://www.littelfuse.com/disclaimer-electronics. Part Numbering System Tape and Reel Specifications Part Number A±5 (mm) N±2 (mm) W1±1 (mm) WPA1206 178 60 9 WPB2512 178 60 13 WPC2512 178 60 13 Part Number W (mm) (mm) P (mm) (mm) (mm) (mm) (mm) F (mm) E (mm) T (mm) (mm) (mm) WPB2512 +0.2/-0.1 WPB2512 WPC2512 +0.2/-0.1 WPC2512 WPC2512 WPC 2512 R L R001 F W R Series Quantity Code Tolerance Code Packaging Code Size TCR Resistance Value CodeLittelfuse Surface Mount CSR Y = 4,000 W = 3,000Q = ±50 ppm °C D = ±75 ppm °C R = ±100 ppm °C G = ±150 ppm °C F = ±1% D = ±0.5% R = Tape and Reel 4 digit code for all values. R or M denotes decimal position as necessary Note: Tape and reel packaging in accordance to EIA-481