resistors RF coat-insulated fusing resistor features •Functions as a resistor in normal condition • Quick fusing protects circuit from excessive overload at an abnormal time • Flame-retardant coating equivalent to UL94 V-0 •Marking: Blue body color with color code marking •Products meet EU RoHS requirements EU dimensions and construction L Trimming Line Resistive Film Type l RF16 ød RF25 Marking Ceramic Core RF50 Electrode Lead Cap Wire Flame Retardant Insulating Coating C RF1 D RF2 L .125±.008 (3.2±0.2) .248±.020 (6.3±0.5) .335±.020 (8.5±0.5) .354±.039 (9.0±1.0) .610±.039 (15.5±1.0) Dimensions inches (mm) ℓ* d (Nominal) C Max. D +.010 .134 .461... .018 −0 (3.4) (1.7 +.25 (0.45) −0 ) .280 .091±.012 (7.1) (2.3±0.3) .024 (0.6) 1.18±.118 .374 .118±.012 (30±3) (9.5) (3.0±0.3) .437 .138±.020 (11.1) (3.5±0.5) .031 (0.8) .709 .236±.039 (18.0) (6.0±1.0) * Lead length changes depending on taping and forming type. ordering information RF 25 C T52 A 100 J Product Code Power Rating Terminal Surface Material Taping & Forming Packaging Nominal Resistance Resistance Tolerance C: SnCu See table below 3 digits J: ±5% 16: 0.17W 25: 0.25W 50: 0.5W 1: 1W 2: 2W A: Ammo R: Reel ratings Type Power Rating Resistance Range E24 J: ±5% Fusing Characteristics Fusing Power Fusing Time T.C.R. Dielectric ×10−6/K Withstanding Voltage 3W2.5W 60 sec 0.17W 1.0 - 1k —— — — RF16C 1Ω - 4.7Ω 5.1Ω - 1kΩ Max. 3.75W 250V 10W7.5W 6.25W 3W RF25C 0.25W 0.1 - 10k — 1Ω - 4.7Ω 0.1 - 0.18Ω 0.2 - 0.43Ω 0.47 - 0.91Ω 5.1Ω - 2.2kΩ 2.4kΩ - 10kΩ±1000: 7.5W R≤4.7Ω 12.5W 6W RF50C 0.5W 0.1 - 15k — — — 0.47Ω - 2Ω 300V 0.1 - 0.43Ω 2.2Ω - 1kΩ 1.1kΩ - 15kΩ 30 sec ±350: 15W Max.R≥5.1Ω 30W25W 12W RF1C 1W 0.1 - 10k — — 0.47Ω - 2Ω 350V 0.1 - 0.18Ω 0.2 - 0.43Ω 2.2Ω - 1kΩ 1.1kΩ - 10kΩ 36W30W 24W 2W 1.0 - 3k — — — 600V RF2C 1Ω - 3.6Ω1.1kΩ - 3kΩ3.9Ω - 1kΩ Rated Ambient Temperature: +70°C Operating Temperature Range: −40 – +155°C Rated voltage = √Power Rating×Resistance value Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 154 11/29/11 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com coat-insulated fusing resistor environmental applications Derating Curve % Rated Power 100 For resistors operated at an ambient temperature of 70°C or above, a power rating shall be derated in accordance with derating curve on the left. 80 60 40 20 0 -40 -20 0 20 40 60 80 100 120 140 160 70 155 Ambient Temperature (°C) Performance Characteristics Performance Requirements ∆R± (% +0.05Ω) Test Items LimitTypical Resistance Within specified — tolerance T.C.R. Within specified T.C.R. — Test Methods 25°C Room temperature +100°C Overload (Short Time) 1% 0.5% Resistance to 1% 0.5% Soldering Heat Rapid Change 1% 0.5% of Temperature Moisture Resistance 5% 2.5% Endurance at 70°C 5% 2.5% Resistance to Solvent No abnormality in — appearance. Marking shall be easily legible. Flame retardant No evidence of flaming — or self-flaming. Rated voltage × 2.5 for 5 seconds 350°C ± 10°C, 3.5s ± 0.5s or 260°C ± 5°C, 10s ± 1s −40°C (30 min.)/ +85°C (30 min.) 5 cycles 40°C ±2°C, 90% - 95% RH, 1000 hours 1.5h ON / 0.5h OFF cycle 70°C ± 2°C, 1000 hours 1.5h ON / 0.5h OFF cycle The resistor shall be immersed in IPA for 30 sec. Flame test : The test flame shall be applied and removed for each 15 sec respsctively to repeat the cycle 5 times. Overload flame retardant: Power corresponding to 2, 4, 8, 16 and 32 times the power rating shall be applied for each 1min. until disconnection occurs. Fusing Characteristics RF16 10Ω 100 RF25 10Ω RF50 10Ω RF1 10Ω RF2 10Ω 60 Fusing Time 30 10 6 3 1 ×5 ×10 ×15 ×20 ×5 ×10 ×15 ×20 ×5 ×10 ×15 ×20 ×5 ×10 ×15 ×20 ×5 ×10 ×15 ×20 Magnification of Power Rating Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/30/10 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 155 resistors RF