DOCUMENT : SMD40000NH REVISION : A0 PAGE : 1 OF 6 SPECIFICATION FOR APPROVAL 1/2W, 2550, L Type Low Resistance Chip Resistor (Lead free / Halogen Free) 1. Scope This specification applies to 2.5mm x 5.0mm size 1/2W, fixed metal foil current sensing resistors used in electronic equipment. 2. Type Designation RL2550 H - □□□□ (1) (2) (3) Where □ (4) (1) Series No. (2) H = H Type (3) Resistance value : For example - R002 = 2mΩ (4) Resistance tolerance F = ± 1% G = ± 2% J = ± 5% 3. Outline Designation and Marking 3-1 Outline Designation L R002 W (1) (2) (3) (4) (5) Substrate Resistor Terminals Protection coat Marking Alumina 96% Cu alloy Sn (on Cu ) Heat resistive epoxy resin Epoxy resin Dimensions (mm) Code Letter RL2550 t a a 5.0 ± 0.20 L W a t 2.5 ± 0.20 1.40 ± 0.25 (1~ 2mΩ) 0.60 ± 0.15 (3mΩ) 0.45 ± 0.15 Figure 1. Construction and Dimensions DOCUMENT : SMD40000NH REVISION : A0 PAGE : 2 OF 6 SPECIFICATION FOR APPROVAL 3-2 Marking Ex.) 2mΩ → R002 Resistance value is marked on the top surface. 4. Ratings 4-1 Specification Power Ratings* 1/2W Resistance Value 1 ~ 3mΩ Temperature Coefficient of Resistance ±275ppm/℃ Resistance Tolerance ±1% , ± 2% , ±5% Insulation Resistance Over 100MΩ Maximum Working Voltage (V) ( P*R)1/2 Note * : 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 RATED LOAD(%) derated in accordance with the following curve. 100 0 -55 70 170 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 +170℃ DOCUMENT : SMD40000NH REVISION : A0 PAGE : 3 OF 6 SPECIFICATION FOR APPROVAL 5. 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 : ± (0.5%+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 : ± (0.5%+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 : ± (0.5%+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 : SMD40000NH REVISION : A0 PAGE : 4 OF 6 SPECIFICATION FOR APPROVAL 6. Recommend Land Pattern L D 2550 W L D 3.03 6.12 2.56 W Cu Trace Sensing Trace Note : We recommend there is no circuit design between pads to avoid circuit short DOCUMENT : SMD40000NH REVISION : A0 PAGE : 5 OF 6 SPECIFICATION FOR APPROVAL 7. Packaging 7-1 Dimensions 7-1-1 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 7-1-2 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 SPECIFICATION FOR APPROVAL 7-2 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 7-3 Number of Taping 2,000 pieces / reel 7-4 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 DOCUMENT : SMD40000NH REVISION : A0 PAGE : 6 OF 6