plate-shaped high precision metal film resistor EU features • Ultra precision T.C.R. up to ±2.5 ppm/°C, tolerance to ±0.01% • Wide resistance range from 10Ω to 1MΩ • Marking: Black body color with laser marking • Products with lead-free terminations meet EU RoHS and China RoHS requirements dimensions and construction D L Outer Coating Film Substrate Type L (max.) MRS1/8 .220 (5.6) MRS1/4 h MRS1/3 Solder Electrode Lead Frame .020 (0.5) H .295 (7.5) Dimensions inches (mm) D (max.) P H .100±.008 (2.54±0.2) .098 (2.5) .200±.008 (5.08±0.2) h (max.) .118±.02 (3.0±0.5) .244 (6.2) .150±.008 .315±.079 (3.81±0.2) (8.0±2.0) .354 (9.0) .010±.020 (0.25±0.5) P ordering information Lead Free MRS 1/3 Product Code Size 1/8: 0.125W 1/4: 0.25W 1/3: 0.3W Please contact factory for other available terminations S D 1002 T T.C.R. (ppm) S: ±2.5 Y: ±5 T: ±10 E: ±25 Terminal Surface Material D: SnAgCu Nominal Resistance 3 significant figures + 1 multiplier “R” indicates decimal on values <100Ω Resistance Tolerance T: ±0.01% Q: ±0.02% A: ±0.05% B: ±0.1% C: ±0.25% D: ±0.5% Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 1/19/11 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 129 resistors MRS MRS applications and ratings T.C.R. Power (ppm/°C) T: ±.01% Rating Max. E96 Y: ±5 –– 0.125W T: ±10 –– E: ±25 –– Y: ±5 –– 0.25W T: ±10 –– E: ±25 –– S: ±2.5 100-100k 0.3W Y: ±5 100-100k T: ±10 100-100k Type MRS1/8 MRS1/4 MRS1/3 Absolute Absolute Rated Operating Maximum Maximum Ambient Temperature Working Overload Temperature Range Voltage Voltage Resistance Range (Ω) Q: ±.02% A: ±.05% B: ±.1% C: ±.25% D: ±.5% E96 E24/E96 & 25, 50 *10n –– 100-250k 100-250k 100-250k 100-250k –– 100-250k 100-510k 30-510k 30-510k –– 100-250k 100-510k 10-510k 10-510k –– 100-510k 100-510k 100-510k 100-510k –– 100-510k 100-1M 30-1M 30-1M –– 100-510k 100-1M 10-1M 10-1M 30.1-100k 30.1-100k 30.1-100k –– –– 30.1-100k 10-100k 10-100k –– –– 30.1-100k 10-100k 10-100k –– –– 200V 400 250V +70°C 500 -55°C to +125°C 200V * MRS1/3 is available only in E96 series. environmental applications Derating Curve Surface Temperature Rise 100 100 Temperature Rise (°C) 80 % Rated Power resistors plate-shaped high precision metal film resistor 60 40 20 0 -60 -40 -55 -20 0 20 40 60 80 70 Ambient Temperature (°C) 75 50 MRS1/8 25 0 100 120 140 125 MRS1/4 0 25 50 75 100 % Rated Power Performance Characteristics Parameter Resistance T.C.R. Overload (Short time) Resistance to Soldering Heat Rapid Change of Temperature Dielectric Withstanding Voltage Endurance at 70°C Requirement ∆ R ±(% + 0.05Ω) Within specified tolerance Within specified T.C.R. ±0.05% ±0.1%: MRS1/8, 1/4 ±0.05%: MRS1/3 ±0.1%: MRS1/8, 1/4 ±0.05%: MRS1/3 ±0.5%: MRS1/8, 1/4 ±0.05%: MRS1/3 ±0.1%: MRS1/8, 1/4 ±0.05%: MRS1/3 Insulation Resistance ±0.1%: MRS1/8, 1/4 ±0.05%: MRS1/3 10,000MΩ and more Resistance to Solvent No abnormality in appearance. Marking shall be easily legible. Moisture Resistance Test Method 25°C +25°C/+65°C Rated voltage x 2.5 or max. overload voltage whichever is lower, for 5 seconds 350°C ± 10°C, 3.5 seconds ± 0.5 second MRS1/8, 1/4: -55 +0-5°C (30 minutes), +125 +3-0°C (30 minutes), 5 cycles MRS1/3: -55 +0-5°C (30 minutes), +125 +3-0°C (30 minutes), 50 cycles 500V (a.c.) for 1 minute between terminals and coatings 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 40°C ± 2°C, 90 ~ 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 500V (d.c.) for 1 minute Soaking in 2-propanol of +20°C~25°C for 180 seconds ± 10 seconds Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 130 11/29/11 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com