CST Series Thin Film Current Sensing Chip Resistor MERITEK Feature and Applications Thin film process High power rating up to 3 Watts in 2512 size Tight tolerance down to ±0.5% Extremely low TCR down to ±50 PPM/°C Resistance values from 50m to 1ohm High purity alumina substrate for high power dissipation Power Management Applications Switching Power Supply Over Current Protection in Audio Applications Voltage Regulation Module (VRM) DC-DC Converter, Battery Pack, Charger, Adaptor Automotive Engine Control Disk Driver Portable Devices (PDA, Cell Phone) PART NUMBERING SYSTEM Recommend Land Pattern CST 0603 D X 1R00 F C Current Sensing Chip Resistors 0805 1206 2512 E ±100 Q 3/4W U 1/2W Resistance Value R010 0.01Ω Resistance Tolerance Code Value Derating Curve 2010 F ±200 V 1/4W W 1/8W B X 1/10W R100 0.1Ω A Unit: mm Y 1/16W Type CST0402 CST0603 CST0805 CST1206 CST2010 CST2512 1R00 1Ω D ±0.5% F ±1% A 0.50 0.80 1.00 2.00 3.60 4.90 B 0.50 1.00 1.00 1.15 1.40 1.60 C 0.60±0.2 0.90±0.2 1.35±0.2 1.70±0.2 2.50±0.2 3.10±0.2 100 Power ratio(%) SIZE 0402 0603 TCR (PPM/°C) D ±50 Power Rating R T 3W 1W 80 60 40 20 0 0 20 40 60 80 100 120 140 160 180 Ambient Temperature(℃) Rev. 7 CST Series Thin Film Current Sensing Chip Resistor MERITEK Construction L D W Alumina Substrate Bottom Electrode (Ag) Top Electrode (Ag-Pd) Edge Electrode (NiCr) Barrier Layer (Ni) External Electrode (Sn) Resistor Layer (NiCr) Overcoat (Epoxy) Marking T D2 Unit: mm Weight (g) Type Size (Inch) L W T D1 D2 CST0402 0402 1.00±0.05 0.50±0.05 0.32±0.10 0.25±0.10 0.20±0.10 0.56 CST0603 0603 1.60±0.10 0.80±0.10 0.45±0.10 0.30±0.20 0.30±0.20 3.1 CST0805 0805 2.00±0.15 1.25±0.15 0.55±0.10 0.30±0.20 0.40±0.25 5.6 CST1206 1206 3.05±0.15 1.55±0.15 0.55±0.10 0.50±0.30 0.40±0.25 12.3 CST2010 2010 5.00±0.20 2.45±0.15 0.60±0.15 0.60±0.30 0.50±0.25 26.7 CST2512 2512 6.35±0.20 3.15±0.15 0.60±0.10 0.60±0.30 0.55±0.25 49.6 (1000pcs) Standard Electrical Specifications Item Resistance Range (mΩ) Power Rating at 70C Operating Temp. Range CST0402 1/16W -55~+155C 500 - 1000 CST0603 1/10W -55~+155C CST0805 1/8W 200 - 300 301 - 1000 200 - 300 301 - 1000 CST1206 1/4W -55~+155C CST2010 3/4W CST2512 1W Type ±0.5% ±1% ±100 ±50 ±100 ±50 ±100 ±50 50 - 100 － TCR (PPM/C) 101 - 300 301 - 1000 ±200 ±100 ±50 -55~+155C 50 - 100 101 - 300 301 - 1000 ±200 ±100 ±50 -55~+155C 50 - 100 101 - 300 301 - 1000 ±200 ±100 ±50 High Power Rating Electrical Specifications Item Power Rating at 70C Operating Temp. Range 3W -55~+155C Type CST2512 Resistance Range (mΩ) ±1% 100 - 1000 TCR (PPM/C) ±100 Operating Voltage=√(P*R) Overload Voltage=2.5*√(P*R) Rev. 7 Thin Film Current Sensing Chip CST Series Resistor MERITEK Environmental Characteristics Item Requirement Temperature Coefficient of Resistance (T.C.R.) As Spec. Short Time Overload ±1% Test Method MIL-STD-202F Method 304 +25/-55/+25/+125/+25C JIS‐C‐5201‐15.5 RCWV*2.5orMax.overloadvoltagefor5seconds Insulation Resistance >1000MΩ MIL‐STD‐202FMethod302 Apply100VDCfor1minute Endurance ±1% Damp Heat with Load ±0.5% Bending Strength As Spec. MIL-STD-202F Method 108A 702C, Max. working voltage for 1000 hrs with 1.5 hrs “ON” and 0.5 hrs “OFF” MIL-STD-202F Method 103B 402C, 90~95% R.H. Max. working voltage for 1000 hrs with 1.5 hrs “ON” and 0.5 hrs “OFF” JIS‐C‐5201‐16.1.4 Bendingamplitude3mmfor10seconds Solderability 95% min. coverage MIL-STD-202F Method 208H 2455C for 3 seconds Resistance to Soldering Heat ±0.5% MIL-STD-202F Method 210E 2605C for 10 seconds Dielectric Withstand Voltage By Type MIL-STD-202F Method 301 Apply Max. Overload Voltage for l minute Thermal Shock ±0.5% MIL-STD-202F Method 107G -55C ~150C, 100 cycles Low Temperature Operation ±0.5% JIS-C-5201-1 7.1 1 hour, -65C followed by 45 minutes of RCWV Storage Temperature: 25±3°C; Humidity < 80%RH Reflow Rev. 7 CST Series Thin Film Current Sensing Chip Resistor MERITEK Packaging Type ψA ΦB ψC W T Paper Tape (EA) Emboss Plastic Tape (EA) CST0402 178.0±1.0 60.0+1.0 13.5±0.7 9.5±1.0 11.5±1.0 10,000 CST0603 178.0±1.0 60.0+1.0 13.5±0.7 9.5±1.0 11.5±1.0 5,000 - CST0805 178.0±1.0 60.0+1.0 13.5±0.7 9.5±1.0 11.5±1.0 5,000 - 9.5±1.0 11.5±1.0 CST1206 178.0±1.0 60.0+1.0 13.5±0.7 5,000 - CST2010 178.0±1.0 60.0+1.0 13.5±0.7 13.5±1.00 15.5±1.0 - 4,000 CST2512 178.0±1.0 60.0+1.0 13.5±0.7 13.5±1.00 15.5±1.0 - 4,000 Paper Tape Specifications Top Tape Bottom Tape ψ D0 E A F B T Paper Tape Type A B P1 Resistor P2 P0 W direction of unreeling W E F P0 P1 P2 ψD0 Unit: mm T CST0402 0.70±0.05 1.16±0.05 8.00±0.10 1.75±0.05 3.5±0.05 4.00±0.10 2.00±0.05 2.00±0.05 1.55±0.05 0.40±0.03 CST0603 1.10±0.05 1.90±0.05 8.00±0.10 1.75±0.05 3.5±0.05 4.00±0.10 4.00±0.10 2.00±0.05 1.55±0.05 0.60±0.03 CST0805 1.60±0.05 2.37±0.05 8.00±0.10 1.75±0.05 3.5±0.05 4.00±0.10 4.00±0.10 2.00±0.05 1.55±0.05 0.75±0.05 CST1206 2.00±0.05 3.55±0.05 8.00±0.10 1.75±0.05 3.5±0.05 4.00±0.10 4.00±0.10 2.00±0.05 1.55±0.05 0.75±0.05 Peel force of top cover tape The peel speed shall be about 300mm/min±5% The peel force of top cover tape shall be between 10 to 100g Rev. 7 CST Series Thin Film Current Sensing Chip Resistor MERITEK Emboss Plastic Tape Specifications Top Tape ψ D0 E A F B W ψ D1 1.4Min. T P1 Resistor P2 P0 direction of unreeling Emboss Tape Unit: mm Type A B W E F P0 P1 P2 ψD0 T CST2010 2.85±0.10 5.45±0.10 12.0±0.10 1.75±0.10 5.5±0.05 4.00±0.05 4.00±0.10 2.00±0.05 1.50+0.10 1.00±0.20 CST2512 3.40±0.10 6.65±0.10 12.0±0.10 1.75±0.10 5.5±0.05 4.00±0.05 4.00±0.10 2.00±0.05 1.50+0.10 1.00±0.20 Peel force of top cover tape The peel speed shall be about 300mm/min±5% The peel force of top cover tape shall be between 10 to 130g Marking 0603 3digit marking 0805~2512 4digit marking Example： Resistance 1 0.1 0.15 0.01 0.101 0.035Ω Codes 1R0 R10 R15 R01 101 035 Example： Resistance 1 0.1 0.05 0.015 0.01 Codes 1R00 R100 R050 R015 R010 Rev. 7 Thin Film Current Sensing Chip CST Series Resistor MERITEK Rev. 7