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Rev. 7 Thin Film Current Sensing Chip Resistor MERITEK CST Series 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 Current Sensing Chip Resistors SIZE 0402 0603 0805 1206 2010 2512 TCR (PPM/°C) D E F ±50 ±100 ±200 Power Rating R T Q U V W X Y 3W 1W 3/4W 1/2W 1/4W 1/8W 1/10W 1/16W Resistance Value R010 R100 1R00 0.01Ω 0.1 Ω 1 Ω Resistance Tolerance Code D F Value ±0.5% ±1% Derating Curve Type A B C CST0402 0.50 0.50 0.60±0.2 CST0603 0.80 1.00 0.90±0.2 CST0805 1.00 1.00 1.35±0.2 CST1206 2.00 1.15 1.70±0.2 CST2010 3.60 1.40 2.50±0.2 CST2512 4.90 1.60 3.10±0.2 100 0 20 40 60 80 100 120 140 160 180 Ambient Temperature(℃) Power ratio(%) B A C Unit: mm
Rev. 7 Thin Film Current Sensing Chip Resistor MERITEK CST Series Construction Unit: mm Type Size (Inch) L W T D1 D2 Weight (g) (1000pcs) Standard Electrical Specifications Item Type Power Rating at 70C Operating Temp. Range Resistance Range (mΩ) TCR (PPM/C) ±0.5% ±1% CST0402 1/16W -55~+155C 500 - 1000 ±100 ±50 CST0603 1/10W -55~+155C 200 - 300 301 - 1000 ±100 ±50 CST0805 1/8W 200 - 300 301 - 1000 ±100 ±50 CST1206 1/4W -55~+155C － 50 - 100 ±200 ±100 ±50 101 - 300 301 - 1000 CST2010 3/4W -55~+155C 50 - 100 101 - 300 301 - 1000 ±200 ±100 ±50 CST2512 1W -55~+155C 50 - 100 101 - 300 301 - 1000 ±200 ±100 ±50 High Power Rating Electrical Specifications Item Type Power Rating at 70C Operating Temp. Range Resistance Range (mΩ) TCR (PPM/C) ±1% CST2512 3W -55~+155C 100 - 1000 ±100 Operating Voltage=√(P*R) Overload Voltage=2.5*√(P*R) Alumina Substrate Edge Electrode (NiCr) Resistor Layer (NiCr) Bottom Electrode (Ag) Barrier Layer (Ni) Overcoat (Epoxy) Top Electrode (Ag-Pd) External Electrode (Sn) Marking L T D W
Rev. 7 Thin Film Current Sensing Chip Resistor MERITEK CST Series Environmental Characteristics Item Requirement Test Method Temperature Coefficient of Resistance (T.C.R.) As Spec. MIL-STD-202F Method 304 Short Time Overload ±1% JIS‐C‐5201‐1 5.5 RCWV*2.5 or Max. overload voltage for 5 seconds Insulation Resistance >1000M Ω MIL‐STD‐202F Method 302 Apply 100VDC for 1 minute Endurance ±1% MIL-STD-202F Method 108A 702C, Max. working voltage for 1000 hrs with 1.5 hrs “ON” and 0.5 hrs “OFF” Damp Heat with Load ±0.5% 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” Bending Strength As Spec. JIS‐C‐5201‐1 6.1.4 Bending amplitude 3mm for 10 seconds 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 Thin Film Current Sensing Chip Resistor MERITEK CST Series Packaging Paper Tape Specifications W E F ψ D0 P1 P2 P0 direction of unreeling A B Top TapeBottom Tape ResistorPaper Tape T Unit: mm Type A B W E F P0 P1 P2 ψD0 T 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 Type ψA ΦB ψC W T Paper Tape (EA) Emboss Plastic Tape (EA)
Rev. 7 Thin Film Current Sensing Chip Resistor MERITEK CST Series Emboss Plastic Tape Specifications W E F ψ D0 P1 P2 P0 direction of unreeling A B Top Tape Resistor Emboss Tape T ψ D1 1.4Min. Unit: mm Type A B W E F P0 P1 P2 ψD0 T 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 0 6 0 3 3 d i g i t m a r k i n g E x a m p l e： Codes 1R0 R10 R15 R01 101 035 0805~2512 4digit marking Example ： Resistance 1 0.1 0.05 0.015 0.01 Codes 1R00 R100 R050 R015 R010
Rev. 7 Thin Film Current Sensing Chip Resistor MERITEK CST Series