Wire-Wound Power Resistor MDR / MDQR / MZR FEATURES Spiral wound, ribbon element, nonflammable coating. Excellent power dissipation, small size, high power ratings. Excellent performance in heavy load applications. Rugged construction for long life. PART NUMBERING SYSTEM MDR 160W VALUE J RES. TOL. 5% = J RESISTANCE 0R1 1R 100R POWER RATING MERITEK WIRE WOUND RESISTOR SERIES ELECTRICAL PERFORMANCE Characteristics Resistance and resistance tolerance Temperature coefficient Power rating load Short-time overload Insulation resistance Dielectric withstanding voltage Limits Range Resistance tolerance ±5%(J) FCHR-2 0.14X1.2m/m 1000~1200ppm/°C max (according to the material) ΔR/R ≤ ±(1% + 0.05Ω) temperature 350°C max ΔR/R ≤ ±(2% + 0.05Ω) DC500V 100MΩ min AC2500V 1.5MA 1 minute Rev. 7 MDR / MDQR / MZR Wire-Wound Power Resistor MDR TYPE DIMENSIONS(mm) Resistance Power Rating A±1 B±2 C±2 D±0.1 E±0.2 F±1 G±2 H±2 I±2 J±2 K±0.1 Range MDR-10W 12.5 45 35 2.1 4 10 55 56 57 30 4 1Ω ~10KΩ MDR-20W 16.5 60 45 3 5 12 70 84 100 37 4 1Ω ~20KΩ MDR-30W 16.5 80 65 3 5 12 90 104 120 37 4 1Ω ~30KΩ MDR-40W 16.5 110 95 3 5 12 120 134 150 37 4 1Ω ~40KΩ MDR-50W 25 110 92 5.2 8 19 120 142 164 58 6 0.1Ω ~50KΩ MDR-60W 28 90 72 5.2 8 17 101 123 145 60 6 0.1Ω ~60KΩ MDR-80W 28 110 92 5.2 8 17 121 143 165 60 6 0.1Ω ~80KΩ MDR-100W 28 140 122 5.2 8 17 151 173 195 60 6 0.1Ω ~100KΩ MDR-120W 28 160 142 5.2 8 17 171 193 215 60 6 0.1Ω ~120KΩ MDR-150W 28 195 177 5.2 8 17 206 229 250 60 6 0.1Ω ~150KΩ MDR-160W 35 185 167 5.2 8 17 197 217 245 75 8 0.1Ω ~160KΩ MDR-200W 35 210 192 5.2 8 17 222 242 270 75 8 0.1Ω ~200KΩ MDR-225W 40 195 173 5.2 8 17 207 227 255 77 8 0.1Ω ~200KΩ MDR-250W 40 210 188 5.2 10 18 222 242 270 77 8 0.5Ω ~250KΩ MDR-300W 40 260 238 5.2 10 18 272 292 320 77 8 0.5Ω ~300KΩ MDR-400W 40 330 308 5.2 10 18 342 380 390 77 8 0.5Ω ~400KΩ MDR-500W 50 330 304 6.2 12 28 346 367 399 105 9 0.5Ω ~500KΩ MDR-600W 50 400 384 6.2 12 28 416 437 469 105 9 1Ω ~600KΩ MDR-700W 50 460 384 6.2 12 28 462 500 530 105 9 1Ω ~600KΩ MDR-800W 60 460 425 6.2 15 30 480 504 533 112 9 1Ω ~800KΩ MDR-1000W 60 540 505 6.2 15 30 560 584 613 112 10 1Ω ~1MΩ MDR-3000W 65 650 620 6.2 15 30 667 700 715 115 10 1Ω ~1.3MΩ Rev. 7 MMDR MDR / MDQR / MDQR / MZR / MZR Wire-Wound Power Resistor MDQR TYPE DIMENSIONS(mm) Resistance Power Rating A±1 B±2 C±2 D±0.1 E±0.2 F±1 G±2 H±2 I±2 J±2 K±0.1 Range MDQR-75W 25 110 95 5.2 8 19 120 142 164 58 6 0.1Ω ~8KΩ MDQR-90W 28 90 72 5.2 8 17 101 123 145 60 6 0.1Ω ~9KΩ MDQR-120W 28 110 92 5.2 8 17 121 143 165 60 6 0.2Ω ~12KΩ MDQR-150W 28 140 122 5.2 8 17 151 173 195 60 6 0.2Ω ~15KΩ MDQR-180W 28 160 142 5.2 8 17 171 193 215 60 6 0.2Ω ~18KΩ MDQR-225W 28 195 177 5.2 8 17 206 229 250 60 6 0.2Ω ~20KΩ MDQR-240W 35 185 167 5.2 8 17 197 219 245 75 8 0.5Ω ~25KΩ MDQR-300W 35 210 192 5.2 8 17 222 242 270 75 8 0.5Ω ~30KΩ MDQR-375W 40 210 188 5.2 10 18 222 242 270 77 8 0.5Ω ~40KΩ MDQR-450W 40 260 238 5.2 10 18 272 292 320 77 8 0.5Ω ~45KΩ MDQR-600W 40 330 308 5.2 10 18 342 380 390 77 8 0.5Ω ~60KΩ MDQR-750W 50 330 304 6.2 12 28 346 367 399 105 9 0.5Ω ~75KΩ MDQR-900W 50 400 374 6.2 12 28 416 437 469 105 9 1Ω ~90KΩ MDQR-1000W 50 460 425 6.2 12 30 480 504 533 105 9 1Ω ~100KΩ MDQR-1200W 60 460 425 6.2 15 30 480 504 533 112 10 1Ω ~120KΩ MDQR-1500W 60 540 505 6.2 15 30 560 584 613 112 10 1Ω ~150KΩ MDQR-2000W 65 650 620 6.2 15 30 667 700 715 115 10 1Ω ~200KΩ Rev. 7 MMDR MDR / MDQR / MDQR / MZR / MZR Wire-Wound Power Resistor MZR TYPE Power DIMENSIONS(mm) Resistance Rating A±2 B±2 C±2 D±2 E±1 F±1 G±1 H±1 I±1 Range MZR-80W 121.5 140 157 170 28 46 14 10 21.5 0.1Ω ~80KΩ MZR-100W 141.5 160 177 190 28 46 14 10 21.5 0.1Ω~100KΩ MZR-120W 166.5 185 202 215 28 46 14 10 21.5 0.1Ω~120KΩ MZR-150W 166.5 185 202 215 35 50 14 10 21.5 0.1Ω~150KΩ MZR-200W 191.5 210 227 240 35 50 14 10 21.5 0.1Ω~200KΩ MZR-250W 235.5 254 271 284 35 50 14 10 21.5 0.1Ω~250KΩ MZR-300W 281.5 300 317 330 35 50 14 10 21.5 0.1Ω~300KΩ Rev. 7