Application Notes Core and Terminal Selection for Type 200, 270, 400 and 470 Tubular Resistors OHMICONE® SILICONE COATED VITREOUS ENAMEL COATED Free Air Wattage Rating Nominal Core Dimensions Inside Diameter Critical Resistance Limiting Factors Code for For Limit Watts Max. Core Min. Ohms and Working Possible Standard Dia. Ohms Over Voltage to Ohms Terminal** Length Outside Diameter 3* 0.438” (11.1mm) 0.210” (5.25mm) 0.130” (3.17mm) AA 0.13 5.25* 0.625” (15.9mm) 0.250” (6.35mm) 0.135” (3.43mm) CA 0.19 6.5 1.0” (25.4mm) 0.250” (6.35mm) 0.125” (3.18mm) CA 0.10 2.30K 27.3K 57 8* 12* 1.0” (25.4mm) 1.75” (44.5mm) 0.313” (7.95mm) 0.313” (7.95mm) 0.188” (4.76mm) 0.188” (4.76mm) D D 0.10 0.10 2.16K 6.52K 17.1K 51.6K 48, 57 48, 57 11 15 20* 26 1.0” (25.4mm) 1.5” (38.1mm) 2.0” (50.8mm) 3.0” (76.2mm) 0.438” (11.1mm) 0.250” (6.35mm) H 0.10 0.10 0.11 0.21 3.02K 6.03K 10.1K 18.1K 28.2K 56.4K 94.0K 169.0K 25* 35 50* 60 75* 2.0” (50.8mm) 3.0” (76.2mm) 4.0” (101.6mm) 5.0” (127.0mm) 6.0” (152.4mm) 0.563” (14.3mm) 0.313” (7.95mm) K 0.15 0.26 0.38 0.50 0.61 12.9K 23.2K 33.5K 43.8K 54.1K 24 30 45 51 61 65 76 90 100* 1.5” (38.1mm) 2.0” (50.8mm) 3.0” (76.2mm) 3.5” (88.9mm) 4.0” (101.6mm) 4.5” (114.3mm) 5.0” (127.0mm) 6.0” (152.4mm) 6.5” (165.1mm) 0.750” (19.1mm) 0.50” (12.7mm) M 0.10 0.10 0.10 0.11 0.13 0.15 0.17 0.21 0.23 9.49K 16.4K 30.2K 37.1K 44.0K 50.9K 57.8K 71.6K 78.5K 52 70 85 105 112 120 140 176 3.0” (76.2mm) 4.0” (101.6mm) 5.0” (127.0mm) 6.0” (152.4mm) 6.5” (165.1mm) 7.0” (177.8mm) 8.0” (203.2mm) 10.0” (254.0mm) 1.0” (25.4mm) 0.625” (15.9mm) N 40 2.0” (50.8mm) 80 4.0” (101.6mm) 95 5.0” (127.0mm) 121 6.0” (152.4mm) 130 6.5” (165.1mm) 160 8.0” (203.2mm) 175* 8.5” (215.9mm) 225* 10.5” (266.7mm) 235 11.25” (285.8mm) 251 12.0” (304.8mm) 1.125” (28.6mm) 0.75” (19.1mm) P 150 5.0” (127.0mm) 1.5” (38.1mm) 1.125” (28.6mm) Q 220 275 300 8.5” (215.9mm) 10.5” (266.7mm) 11.75” (298.5mm) 1.625” (41.3mm) 1.125” (28.6mm) R 250 500 750 1000 6.0” (152.4mm) 12.0” (304.8mm) 15.0” (381.0mm) 20.0” (508.0mm) 2.5” (63.5mm) 1.75” (44.5mm) S 0.15 0.38 0.50 0.69 0.1 8.0K 155 15.8K 48, 58 0.1 15.0K 281 34.0K 21.6K 375 45.4K 0.1 9.87K 50.0K 281 775 42.8K 50.4K 57 40 48-40 40 0.1 7.18K 21.1K 44.0K 110.0K 281 563 938 1690 35.3K 70.5K 118.0K 212.0K 100.0K 180.0K 260.0K 340.0K 420.0K 40 0.1 35.2K 81.6K 119.0K 170.0K 207.0K 938 1690 2440 3190 3940 151.0K 272.0K 393.0K 340.0K 420.0K 12.2K 21.1K 38.8K 47.6K 56.5K 65.3K 74.2K 91.9K 101.0K 40 0.1 11.1K 26.6K 59.8K 80.0K 93.6K 118.0K 130.0K 168.0K 182.0K 516 893 1640 2020 2390 2770 3140 3890 4270 73.6K 127.0K 234.0K 288.0K 341.0K 395.0K 448.0K 555.0K 609.0K 0.11 0.17 0.22 0.27 0.30 0.33 0.38 0.49 25.3K 37.2K 49.1K 61.0K 67.1K 72.9K 84.8K 109.0K 40 0.1 49.2K 78.9K 113.0K 141.0K 159.0K 176.0K 204.0K 267.0K 1600 2350 3100 3850 4220 4600 5350 6850 305.0K 448.0K 591.0K 734.0K 805.0K 877.0K 1.02M 1.31M 0.10 0.10 0.10 0.10 0.10 0.12 0.13 0.16 0.18 0.19 9.63K 37.7K 51.7K 65.7K 72.7K 93.7K 101.0K 129.0K 139.0K 150.0K 46 0.1 6.66K 51.0K 80.8K 102.0K 116.0K 158.0K 166.0K 211.0K 237.0K 257.0K 516 2020 2770 3520 3890 5020 5390 6890 7460 8030 89.3K 328.0K 450.0K 572.0K 633.0K 816.0K 877.0K 1.12M 1.21M 1.31M 0.10 34.2K 45 0.1 44.4K 2580 433.0K 0.18 0.23 0.26 75.0K 96.6K 110.0K 45 0.1 123.0K 164.0K 195.0K 5210 6710 7650 351.0K 452.0K 516.0K 45 0.1 35.0K 111.0K 125.0K 180.0K 2960 7460 9680 13400 86.3K 218.0K 283.0K 392.0K Tolerance ±0.031 (0.794mm) ±0.047 (1.191mm) +0.063 (1.588mm) / -0.094 (2.381mm) ±0.125 (3.175mm) Tolerances do not include effect of longitudinal camber. Tolerance To 0.500 (12.700mm) Over 0.500 (12.700mm) to 1.125 (28.575mm) Over 1.125 (28.575mm) to 1.750 (44.450mm) ±0.016 (0.397mm) ±0.031 (0.794mm) ±0.063 (1.588mm) Limit wattage to 78% of free air watts and working volts to 500V per inch of winding space between terminal edges Limits controlled by free air watts and working volts to 500V per inch of winding space between terminal edges 6.11K 15.4K 20.0K 27.7K Maximum Diameter Over Coating: The overall diameter of a finished resistor includes the build-up due to wire diameter, coating and terminal material. This results in a possible maximum increase in diameter of 0.188 (4.763mm) for low resistance, 1.125 (28.575mm) O.D. core resistors and larger; 0.156 (3.969mm) for resistors with smaller diameter cores. On all high resistance units the increase is generally less than 0.125 (3.175mm). Other Core Sizes: Many other specials are available including cores with special inside diameter listed at right. Ohmite Mfg. Co. Limit Max. Working Possible Voltage to Ohms 48, 58 Tolerance on Nominal Core Dimensions I.D. For Ohms Over 7.06K **See Application Note “Resistor Terminals for Tubular Cores,” page 35. 0.438 (11.113mm) to 4.00 (101.60mm) Over 4.00 (101.60mm) to 6.50 (165.10mm) Over 6.50 (165.10mm) to 11.25 (285.575mm) Over 11.25 (285.575mm) to 20.0 (0.508mm) Min. Ohms 3.48K Limits controlled by free air watts and max. possible ohms *These core sizes are used for the standard items. See the listing of the resistance values under Types 200, 210 and 270 Length Critical Resistance Limiting Factors Cores with Non-standard I.D. (or O.D.) O.D. I.D. Code 0.313” (7.938mm) 0.219” (5.556mm) DA 0.438” (11.113mm) 0.313” (7.938mm) HA 0.563” (14.288mm) 0.391” (9.922mm) KA 0.625” (15.875mm) 0.453” (11.509mm) LA 0.750” (19.050mm) 0.547” (13.891mm) MA 0.938” (23.813mm) 0.563” (14.288mm) UA 1.125” (28.575mm) 0.875” (22.225mm) PA Tel. 1-866-9-OHMITE • Fax 1-847-574-7522 • www.ohmite.com • [email protected] Application Notes Core and Terminal Selection for Type 210 and 410 Tubular Resistors VITREOUS ENAMEL COATED Free Air Wattage Rating Nominal Core Dimensions Inside Diameter Code for Core Std. Min. Dia. Term.** Ohms Critical Resistance Limiting Factors OHMICONE® SILICONE COATED Critical Resistance Limiting Factors Max. Possible Ohms Length Outside Diameter 3* 0.438” (11.1mm) 0.210” (5.25mm) 0.130” (3.17mm) AA 48, 58 5.25* 0.625” (15.9mm) 0.250” (6.35mm) 0.135” (3.43mm) CA 48, 58 6.5 1.0” (25.4mm) 0.250” (6.35mm) 0.125” (3.18mm) CA 57 8* 12* 1.0” (25.4mm) 1.75” (44.5mm) 0.313” (7.95mm) 0.313” (7.95mm) 0.188” (4.76mm) 0.188” (4.76mm) D D 48, 57 48, 57 0.95 4.47K 11 15 20* 26 1.0” (25.4mm) 1.5” (38.1mm) 2.0” (50.8mm) 3.0” (76.2mm) 0.438” (11.1mm) 0.250” (6.35mm) H 57 40 48-40 40 0.44 0.73 1.30 4.14K 6.90K 12.4K 25* 35 50* 60 75* 2.0” (50.8mm) 3.0” (76.2mm) 4.0” (101.6mm) 5.0” (127.0mm) 6.0” (152.4mm) 0.563” (14.3mm) 0.313” (7.95mm) K 40 0.24 0.43 0.62 0.81 1.00 8.88K 16.0K 23.1K 30.2K 37.3K 24 30 45 51 61 65 76 90 100* 1.5” (38.1mm) 2.0” (50.8mm) 3.0” (76.2mm) 3.5” (88.9mm) 4.0” (101.6mm) 4.5” (114.3mm) 5.0” (127.0mm) 6.0” (152.4mm) 6.5” (165.1mm) 0.750” (19.1mm) 0.50” (12.7mm) M 40 0.24 0.42 0.77 0.95 1.10 1.30 1.50 1.80 1.00 6.16K 10.7K 19.6K 24.1K 28.6K 33.0K 37.5K 46.5K 50.9K 52 70 85 105 112 120 140 176 3.0” (76.2mm) 4.0” (101.6mm) 5.0” (127.0mm) 6.0” (152.4mm) 6.5” (165.1mm) 7.0” (177.8mm) 8.0” (203.2mm) 10.0” (254.0mm) 1.0” (25.4mm) 0.625” (15.9mm) N 40 0.18 0.26 0.34 0.42 0.47 0.51 0.59 0.75 40 2.0” (50.8mm) 80 4.0” (101.6mm) 95 5.0” (127.0mm) 121 6.0” (152.4mm) 130 6.5” (165.1mm) 160 8.0” (203.2mm) 175* 8.5” (215.9mm) 225* 10.5” (266.7mm) 235 11.25” (285.8mm) 251 12.0” (304.8mm) 1.125” (28.6mm) 0.75” (19.1mm) P 46 0.10 0.25 0.34 0.44 0.48 0.62 0.67 0.86 0.93 1.00 150 5.0” (127.0mm) 1.5” (38.1mm) 1.125” (28.6mm) Q 45 0.41 29.4K 220 275 300 8.5” (215.9mm) 10.5” (266.7mm) 11.75” (298.5mm) 1.625” (41.3mm) 1.125” (28.6mm) R 45 0.91 1.20 1.30 64.6K 83.2K 94.8K 250 500 750 1000 6.0” (152.4mm) 12.0” (304.8mm) 15.0” (381.0mm) 20.0” (508.0mm) 2.5” (63.5mm) 1.75” (44.5mm) S 45 0.61 1.50 2.00 2.80 6.11K 15.4K 20.0K 27.7K For Ohms Over Limit Watts and Working Voltage to Limit Watts and Working Voltage to These core sizes not available as adjustable resistors 10W; 316V 12W; 345V These core sizes not available as adjustable resistors 10.0K 11.8K 19.7K 35.5K Limit wattage to 78% of free air watts and working volts to 500V per inch of winding space between terminal edges Limits controlled by free air watts and working volts to 500V per inch of winding space between terminal edges 25.0K 45.6K 100.0K 86.2K 100.0K 8.73K 15.1K 27.8K 34.1K 40.5K 46.8K 53.2K 65.9K 100.0K 25.3K 37.2K 49.1K 61.0K 67.0K 72.9K 84.8K 109.0K Limits controlled by free air watts and working volts to 500V per inch of winding space between terminal edges 9.57K 37.4K 51.3K 65.2K 72.2K 93.0K 100.0K 100.0K 138.0K 148.0K *These core sizes are used for the standard items. See the listing of the resistance values under Types 200, 210 and 270 **See Application Note “Resistor Terminals for Tubular Cores,” page 35. Ohmite Mfg. Co. Tel. 1-866-9-OHMITE • Fax 1-847-574-7522 • www.ohmite.com • [email protected]