DOCUMENT : NP-08-034 (Preliminary specification) SPECIFICATION FOR APPROVAL REVISION : A2 PAGE : 1 OF 6 3W, 4527, SL Type Low Resistance Chip Resistor (Lead / Halogen Free) 1. Scope This specification applies to 7.1mm x 12mm size 3W, fixed metal foil current sensing resistors used in electronic equipment. 2. Type Designation RL45270W – □□□□ (1) (2) Where □ (3) (1) Series No. (2) Resistance value : For example : Four digits of number R010 = 10mΩ (3) Tolerance : Refer to paragraph 4 3. Dimensions and schematic L Dimensions (mm) Code Letter R010 W L 12.0 ± 0.20 W 7.10 ± 0.20 a 2.50 ± 0.20 t 0.90 ± 0.20 t a a 4527 Figure 1. Construction and Dimensions DOCUMENT : NP-08-034 (Preliminary specification) SPECIFICATION FOR APPROVAL REVISION : A2 PAGE : 2 OF 6 4. Specification Characteristics Feature Power Rating* 3W Resistance Value 4 mΩ,10~120mΩ ± 75ppm/℃ Temperature Coefficient of Resistance Operation Temperature Range -55℃ ~ +170℃ Resistance Tolerance ± 1%(F) , ± 2%(G) , ± 5%(J) 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 RATED LOAD(%) resistors operated at ambient temperature in excess of 70℃, the maximum load shall be derated in accordance with the following curve. 100 0 -55 70 170 AMBIENT TEMPERATURE(℃) Figure 2.：Power Temperature Derating Curve DOCUMENT : NP-08-034 (Preliminary specification) SPECIFICATION FOR APPROVAL REVISION : A2 PAGE : 3 OF 6 5. Reliability Performance Test Item Short Time Overload Condition of Test 5 x Rated power for 5 seconds Refer to JIS C 5201-1 4.13 Thermal Shock Requirements ∆R：± (1.0% + 0.0005Ω) -55 ~155℃ 100 cycles, 15 min at each extreme condition ∆R：± (0.5% + 0.0005Ω) Refer to JIS C 5201-1 4.19 Low Temperature Storage Kept at -55℃, 1,000 hours Refer to JIS C 5201-1 4.23.4 Resistance to Soldering Heat ∆R：± (1.0% + 0.0005Ω) Dipped into solder at 270 ± 5℃ for 10 ± 1 seconds ∆R：± (0.5% + 0.0005Ω) Refer to JIS C 5201-1 4.18 Load Life Rated voltage for 1.5hours followed by a pause 0.5hour at 70 ± 3℃ Cycle repeated 1,000 hours ∆R：± (2.0% + 0.0005Ω) Refer to JIS C 5201-1 4.25 Damp Heat with Load 40 ± 2℃ with relative humidity 90% to 95%, 1,000 hours ∆R：± (1.0% + 0.0005Ω) Refer to JIS C 5201-1 4.24 High Temperature Exposure Kept at 170℃ for 1,000 hours Refer to JIS C 5201-1 4.23.2 Solderability Mechanical Shock Temperature of Solder : 245 ± 5℃ Uniform coating of solder Immersion Duration : 3 ± 0.5 second cover minimum of 95% Refer to JIS C 5201-1 4.17 surface being immersed 100 G’s for 6milliseconds. 5 pulses ∆R：± (0.5% + 0.0005Ω) Refer to JIS C 5201-1 4.21 Substrate Bending ∆R：± (1.0% + 0.0005Ω) 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) DOCUMENT : NP-08-034 (Preliminary specification) SPECIFICATION FOR APPROVAL REVISION : A2 PAGE : 4 OF 6 6. Recommend Land Pattern L D 4527 W (mm) L (mm) D (mm) t (μm) 7.5 13.0 4.0 105 t: Copper foil minimum thickness of PCB W Cu Trace Sensing Trace Note : We recommend there is no circuit design between pads to avoid circuit short 7. Packaging 7-1 Dimensions 7-1-1 Tape packaging dimensions Symbol Spec Symbol Spec Ao Bo Ko Po P1 P2 T 7.38±0.10 12.00±0.10 1.05±0.10 4.0±0.10 12.0±0.10 2.0±0.10 0.30±0.10 E F Do D1 W 10Po 1.75±0.10 11.50±0.10 1.55±0.05 1.50±0.10 24.0±0.30 40.0±0.20 DOCUMENT : NP-08-034 (Preliminary specification) SPECIFICATION FOR APPROVAL REVISION : A2 PAGE : 5 OF 6 7-1-2 Reel dimensions C D H F B A G A 24.5 ± 0.5 F 20.2 ± 0.1 B 2.0 ± 0.2 G 13.0+0.5 -1.0 C 100 ± 1.0 H 2.2 ± 0.1 D 330 ± 0.5 Unit : mm DOCUMENT : NP-08-034 (Preliminary specification) SPECIFICATION FOR APPROVAL REVISION : A2 PAGE : 6 OF 6 DOCUMENT : NP-08-034 (Preliminary specification) SPECIFICATION FOR APPROVAL REVISION : A2 PAGE : 7 OF 6 7-2 Peel Strength of Top Cover Tape The peel speed shall be about 300mm/min. 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) (2) (3) (4) Type designation Quantity Manufacturing date code Manufacturer’s name (5) The country of origin