CYNTEC CO., LTD. DOCUMENT : SR540000N REVISION : A1 PAGE : 1 OF 8 2550 1/2W Low Resistance Chip Resistor 1. Scope This specification applies to 2.5mm x 5.0mm size 1/2W, fixed metal film chip resistors rectangular type for use in electronic equipment. 2. Type Designation RL2550 (1) Where H - - N (2) (3) (4) (5) (1) Series No. (2) H = H Type (3) Resistance value : For example - R003 = 3m R100 = 100m (4) Resistance tolerance F = 1% G = 2% J = 5% (5) N = Sn plating (Lead free , RoHS compliant) 3. Outline Designation and Marking 3-1 Outline Designation L (5) (4) Substrate Resistor Terminals Protection coat Marking Alumina 96% Ni-Cu alloy Sn (on Cu ) Heat resistive epoxy resin Epoxy resin (3) R003 W (1) (2) (3) (4) (5) (2) t Code Letter Dimensions (mm) RL2550 5.0 0.20 L (Bottom View) a a (1) W a t 2.5 0.20 1.00 0.15 (3m) 0.80 0.15 (3m) 0.95 0.15 Figure 1. Construction and Dimensions CYNTEC CO., LTD. DOCUMENT : SR540000N REVISION : A1 PAGE : 2 OF 8 3-2 Marking Resistance value is marked on the top surface. Ex.) 47m R047 100m R100 4. Ratings 4-1 Specification Power Ratings* 1/2W Resistance Value** 1 ~ 50m Temperature Coefficient of Resistance (10m) 100ppm/ (>10m) 50ppm/ Resistance Tolerance 1% , 2% , 5% Insulation Resistance Over 100M Maximum Working Voltage (V) ( P*R)1/2 Note * : RATED LOAD(%) Power ratings is based on continuous full load operation at rated ambient temperature of 70. For resistors operated at ambient temperature in excess of 70, the maximum load shall be derated in accordance with the following curve. 100 0 70 -55 125 AMBIENT TEMPERATURE() Figure 2.Power Temperature Derating Cure 4-2 Maximum over current I = 50 / R [A]/ 10ms Where I : maximum current 40A R : Nominal resistance value () Interval 60 seconds minimum If maximum current so obtained exceed than 40A , use 40A as maximum current. 4-3 Operation and Storage Temperature Range -55 to +125 CYNTEC CO., LTD. DOCUMENT : SR540000N REVISION : A1 PAGE : 3 OF 8 5. Schematic Diagram. Measurement Point Schtemtic Diagram Measurement Point V R047 I V Current terminal I Voltage terminal V I 6. Life test 6-1 Electrical 6-1-1 Short Time Overload Resistance Change : ( 0.5% + 0.0005 ) Without significant damage by flashover ( spark, arching ), burning or breakdown etc. Test voltage : 2.5 times the rated voltage. Duration : 5 seconds 6-1-2 Insulation Resistance (1) Between Electrode and Protection Film 100M or over (2) Between Electrode and Substrate 1,000M or over The resistor shall be cramped in the metal block and tested , as shown below. Test voltage : 100 15VDC for 1 minute Refer to JIS C 5202 5.6 Mounting condition G. Insulation Prate Pressure Rod (Metal) Measurement Point A Substrate Protection Film Spring R0.5 Test Sample Metal Block Measurement Point B CYNTEC CO., LTD. DOCUMENT : SR540000N REVISION : A1 PAGE : 4 OF 8 6-2 Mechanical 6-2-1 Solderability A new uniform coating of solder shall cover minimum of 95% of the surface being immersed. Temperature of solder : 245 5 Immersion duration : 3 0.5 seconds 6-2-2 Resistance to Soldering Heat Resistance change : ( 0.5% + 0.0005 ) Electrical characteristics shall be satisfied. Without distinct deformation in appearance Dipped into solder for 10 1 seconds at 270 5 6-2-3 Substrate bending Resistance change : ( 0.5% + 0.0005 ) Without mechanical damage such as breaks. Electrical characteristics shall be satisfied. Glass-Epoxy bard t = 1.6mm Bending value : 2mm Between the fulcrums : 90mm CYNTEC CO., LTD. DOCUMENT : SR540000N REVISION : A1 PAGE : 5 OF 8 6-3 Endurance 6-3-1 Rapid change of temperature Resistance change : ( 0.5% + 0.0005 ) Without distinct damage. Perform 5 cycles as follows : -55 for 30minutes room temperature for 3 minutes +125 for 30minutes room temperature for 3 minutes 6-3-2 Endurance at 70 Resistance change : ( 0.5% + 0.0005 ) Without distinct damage. Rated voltage for 1.5 hours followed by a pause 0.5 hour at a temperature of 70 3. Cycle shall be repeated for 1,000 hours. 6-3-3 Dump heat with load Resistance change : ( 0.5% + 0.0005 ) The marking shall be legible. 60 2 with relative humidity of 90% to 95%. D.C. rated voltage for 1.5 hours ON 30 minutes OFF. Cycle shall be repeated for 1,000 hours. CYNTEC CO., LTD. DOCUMENT : SR540000N REVISION : A1 PAGE : 6 OF 8 7. Recommend Land Pattern VOLTAGE SENSE LINE 0.50mm LAND PATTERN SOLDER RESIST AREA D CURRENT LINE B' B A C A B B' C D 3.1 2.75 1.4 7.0 3.05 Unit : mm CYNTEC CO., LTD. DOCUMENT : SR540000N REVISION : A1 PAGE : 7 OF 8 8. Packaging 8-1 Dimensions 8-1-1 Tape packaging dimensions 1.55 0.05 0.230.10 4.0 0.10 1.75 0.10 2.0 0.05 5.50 0.05 5.35 0.10 12.0 0.30 1.050.10 4.0 0.10 2.80 0.10 1.500.1 Pulling direction Unit : mm 8-1-2 Reel dimensions 13.00.5 4.0 0 +0 -0 .5 2.00.5 178.02.0 60.20.5 13.21.5 16.00.2 Unit : mm CYNTEC CO., LTD. DOCUMENT : SR540000N 8-2 Peel Strength of Top Cover Tape The peel speed shall be about 300mm/minute The peel force of top cover tape shall between 0.1 to 0.7N Top Cover Tape 165 ~ 180 0.1 ~ 0.7N Carrier tape 8-3 Number of Taping 2,000 pieces / reel 8-4 Label marking The following items shall be marked on the reel. (1) Type designation (2) Quantity (3) Manufacturing date code (4) Manufacturer's name (5) The country of origin REVISION : A1 PAGE : 8 OF 8