DOCUMENT : SM560000NH REVISION : A0 PAGE : 1 OF 8 SPECIFICATION FOR APPROVAL 1W, 2010, Low Resistance Chip Resistor (Lead / Halogen Free) 1. Scope This specification applies to 2.5mm x 5.0mm size 1W, fixed metal film chip resistors rectangular type for use in electronic equipment. 2. Type Designation RL2550 (1) Where W - □□□□ (3) (2) (1) Series No. □ (4) (2) W = W Type (3) Resistance value : For example - R005 = 5mΩ R050 = 50mΩ (4) Resistance tolerance F = ± 1% G = ± 2% J = ± 5% 3. Outline Construction and Marking 3-1 Outline Construction (5) L (4) (3) (1) (2) (3) (4) (5) Substrate Resistor Terminals Protection coat Marking R005 W Alumina 96% Cu alloy Sn (on Cu ) Heat resistive epoxy resin Epoxy resin Dimensions (mm) (2) Code Letter RL2550 t (Bottom View) a a L 5.0 ± 0.20 W a t 2.5 ± 0.20 1.00 ± 0.15 (1) Figure 1. Construction and Dimensions 0.80 ± 0.15 DOCUMENT : SM560000NH REVISION : A0 PAGE : 2 OF 8 SPECIFICATION FOR APPROVAL 3-2 Marking Resistance value is marked on the top surface. Ex.) 5mΩ → R005 50mΩ → R050 4. Ratings 4-1 Specification Power Rating* 1W Resistance Value 5 ~ 50mΩ (≤10mΩ) ±100ppm/℃ (>10mΩ) ± 50ppm/℃ Temperature Coefficient of Resistance Resistance Tolerance ±1% , ± 2% , ±5% Insulation Resistance Over 100MΩ ( P*R)1/2 Maximum Working Voltage (V) Note * : Power rating 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 RATED LOAD(%) derated in accordance with the following curve. 100 0 70 -55 125 AMBIENT TEMPERATURE(℃) Figure 2.：Power Temperature Derating Curve 4-2 Rated Voltage The rated voltage shall be determined by the following expression. V = P× R Where V：Rated voltage (V) R：Nominal resistance value (Ω) P：Rated dissipation (W) 4-3 Operation and Storage Temperature Range -55℃ to +125℃ DOCUMENT : SM560000NH REVISION : A0 PAGE : 3 OF 8 SPECIFICATION FOR APPROVAL 5. Schematic Diagram. Measurement Point Schtemtic Diagram Measurement Point V R050 I V I V Current terminal I Voltage terminal DOCUMENT : SM560000NH REVISION : A0 PAGE : 4 OF 8 SPECIFICATION FOR APPROVAL 6. Characteristics Test Item Condition of Test Requirements Short Time Overload 2.5 * rated voltage for 5 seconds Refer to JIS C 5201-1 4.13 ∆R : ± (0.5%+0.0005Ω) Without significant damage by flashover ( spark, arching ), burning or breakdown etc. Insulation Resistance 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 5201-1 4.6 Mounting condition G. Between Electrode and Protection Film 100MΩ or over Between Electrode and Substrate 1,000MΩ or over Voltage Proof The voltage : 100VAC (rms.) for 1 minute ∆R : ± (0.5%+0.0005Ω) Refer to JIS C 5201-1 4.7 Without damage by flashover, fire or breakdown, as shown below. Thermal Shock -55 ~125℃ 5 cycles, 15 min at each extreme condition Refer to JIS C 5201-1 4.19 ∆R : ± (1.0%+0.0005Ω) Without distinct damage in appearance Low Temperature Storage Kept at -55℃, 1,000 hours Refer to JIS C 5201-1 4.23.4 ∆R : ± (1.0%+0.0005Ω) Without distinct damage in appearance High Temperature Exposure Kept at 125℃ for 1,000 hours Refer to JIS C 5201-1 4.23.2 ∆R : ± (1.0%+0.0005Ω) Without distinct damage in appearance Solderability Temperature of Solder : 245 ± 5℃ Immersion Duration : 3 ± 0.5 second Refer to JIS C 5201-1 4.17 Uniform coating of solder cover minimum of 95% surface being immersed Resistance to Soldering Heat Dipped into solder at 270 ± 5℃ for 10 ± 1 seconds Refer to JIS C 5201-1 4.18 ∆R : ± (0.5%+0.0005Ω) Without distinct deformation in appearance DOCUMENT : SM560000NH REVISION : A0 PAGE : 5 OF 8 SPECIFICATION FOR APPROVAL Test Item Condition of Test Requirements Load Life Rated voltage for 1.5 hours followed by a pause 0.5 hour at 70 ± 2℃. Cycle repeated 1000 hours Refer to JIS C 5201-1 4.25 ∆R : ± (1.0%+0.0005Ω) Without distinct damage in appearance Damp Heat with Load 40 ± 2℃ with relative humidity 90% to 95%. D.C. rated voltage for 1.5 hours ON and 30 minutes OFF. Cycle repeated 1,000 hours Refer to JIS C 5201-1 4.24 ∆R : ± (0.5%+0.0005Ω) Without distinct damage in appearance Mechanical Shock 100 G’s for 6milliseconds. 5 pulses Refer to JIS C 5201-1 4.21 ∆R : ± (0.5%+0.0005Ω) Without mechanical damage such as break Bending Test Glass-Epoxy board thickness : 1.6mm Bending width : 2mm Between the fulcrums : 90mm Refer to JIS C 5201-1 4.33 ∆R : ±(0.5%+0.0005Ω) Without mechanical damage such as break DOCUMENT : SM560000NH REVISION : A0 PAGE : 6 OF 8 SPECIFICATION FOR APPROVAL 7. Recommended Solder Pad Dimensions L 2550 W L D 3.05 6.12 1.56 D W Unit : mm Cu Trace Sensing Trace Note : We recommend there is no circuit design between pads to avoid circuit short DOCUMENT : SM560000NH REVISION : A0 PAGE : 7 OF 8 SPECIFICATION FOR APPROVAL 8. Packaging 8-1 Dimensions 8-1-1 Tape packaging dimensions 1.55 ± 0.05 0.23±0.10 4.0 ± 0.10 1.75 ± 0.10 2.0 ± 0.05 5.50 ± 0.05 5.35 ± 0.10 12.0 ± 0.30 1.05±0.10 4.0 ± 0.10 2.80 ± 0.10 1.50±0.1 Pulling direction Unit : mm 8-1-2 Reel dimensions 13.0±0.5 4.0 0 +0 - 0 .5 2.0±0.5 178.0±2.0 60.2±0.5 13.2±1.5 16.0±0.2 Unit : mm DOCUMENT : SM560000NH SPECIFICATION FOR APPROVAL 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 : A0 PAGE : 8 OF 8