WLTC0612R001-R005

WLTC LITTELFUSE | Alldatasheet

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Current Sense Resistor Datasheet © 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.03/17/23 Two-Terminal Surface Mount Resistor WLTC Series Littelfuse WLTC Series low ohm current sense resistor is designed with long term stability in mind. This series is durable, excels at heat dissipation. The small package is optimal for most applications.

Description

■ Low TCR ■ Optimal linearity in I / V conversion ■ Epoxy substrate ■ Small size ■ High voltage Features & Benefits ■ Power management ■ Low ESL Application RoHS Pb Resources Accessories Samples Additional Information Electrical Specifications Part Number Size Resistance Value Power Rating (W) TCR (ppm / ºC) Standard Package QtyInch mm Ro (mΩ) Rt (%) WLTC0508RLR002FNR 0508 1220 2 ±1 .0% 1 ±100 5000 WLTC0508QLR003FNR 0508 1220 3 ±1 .0% 1 ±50 5000 WLTC0508QLR004FNR 0508 1220 4 ±1 .0% 1 ±50 5000 WLTC0508QLR005FNR 0508 1220 5 ±1 .0% 1 ±50 5000 WLTC0612QLR001FNR 0612 1632 1 ±1 .0% 1 ±50 5000 WLTC0612QLR002FNR 0612 1632 2 ±1 .0% 1 ±50 5000 Note: Resistors are available in steps of 1mOhm. Ratings not indicated in the above table may be available on request.

Current Sense Resistor Datasheet © 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.03/17/23 Two-Terminal Surface Mount Resistor WLTC 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 80 120 155

Current Sense Resistor Datasheet © 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.03/17/23 Two-Terminal Surface Mount Resistor WLTC Series T est Procedure Specifications Short T erm Overload 2.5 times the rated voltage shall be applied for 5 sec. ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Load Life (Operational Life) At temperature 70°C, rated power shall be repeatedly applied for 1 .5hrs followed by a pause of 30 min. 1,000 Hours ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Low T emp. Exposure Test Temp -55°C Test Period: 1,000 hours No Electrical Load ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. T emp. Cycling (Thermal Shock) Repeat 100 cycles as follows: -55°C for 30 minutes 155°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 Test Temp 155°C Test Period: 1,000 hours No Electrical Load ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Moisture Load Life At temperature 60°C / 95%RH, rated power shall be repeatedly applied for 1 .5hrs followed by a pause of 30 min.1,000 Hours ±1 .0% Appearance: Without distinct damage, and the marking shall be legible. Resistance to soldering heat Reflow soldering as per JEDEC-J-STD-020. Repeat for a total of 3 cycles. ±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: 3 seconds at 245°C A new solder shall cover minimum of 95% Reliability Specifications

Current Sense Resistor Datasheet © 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.03/17/23 Two-Terminal Surface Mount Resistor WLTC Series Dimensions Recommended Land Pattern All dimensions in mm Part Number W L T A Part Number P W D Loading WLTC0508 R001 0.40 mm 2.30 mm 0.90 mm 1 .0 W WLTC0508 1M50~R005 0.50 mm 2.30 mm 0.85 mm 1 .0 W WLTC0612 R001~R005 0.60 mm 3.68 mm 1 .30 mm 1 .0 W Packaging Part Number Halogen Free Packaging Option Quantity Quantity & Packaging Codes WLTC0508 Ye s Tape and Reel 5000 NR WLTC0612 Ye s Tape and Réel 5000 NR

Current Sense Resistor Datasheet © 2023 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.03/17/23 Two-Terminal Surface Mount Resistor WLTC 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 WLTC 0508 G L R001 F N R Series Quantity Code Tolerance Code Packaging Code Size TCR Resistance Value CodeLittelfuse Surface Mount CSR Ex.: 1 .5 mΩ = 1M50, 2 mΩ = R002 N = 5,000 F = ±1% R = Tape and Reel Long side electrode Q = ±50 ppm °C, R = ±100 ppm °C, G = ±150 ppm °C Part Number A±5 (mm) N±2 (mm) W1±1 (mm) WLTC0508 178 60 9.0 WLTC0612 178 60 9.0 Part Number W P0 P P2 A0 B0 D0 F E T T1 K0