resistors RF26 coat-insulated fusing resistors (l-style) EU features • Functions as a resistor in normal condition • Quick fusing protects circuit from excessive overload • High density mounting and excellent self-standing strength with L-shape leads frame (lead pitch. 5.08mm) • Flame-retardant coating equivalent to UL94 V-0 • Marking: Blue body color with color dot marking •Products meet EU RoHS requirements dimensions and construction L D Electrode Insulation Trimming Line Coating Marking Ceramic Cap Core Type Dimensions inches (mm) D Max. P H .100 .200±.012 .197±.039 (2.54) (5.08±0.3) (5.0±1) h Max. .217 (5.5) h RF26 2E L Max. .285 (7.25) 0.3±0.05 Terminal H Resistive Film 0.5±0.1 P ordering information RF26 B 2E T T A 100 J Product Code T.C.R. (×10−6/K) Power Rating Terminal Surface Material Taping & Forming Packaging Nominal Resistance Resistance Tolerance B: ±350 2E: 0.25W T: Sn T: Taping 3 digits J: ±5% A: Ammo applications and ratings Power Rating Resistance Range(Ω) J: ±5% 0.25W 0.1 - 1k (E24) Fusing Characteristics Fusing Power Fusing Time 10W 7.5W 6.25W 3.75W 3W 30 sec Max. 0.1Ω - 0.18Ω 0.2Ω - 0.43Ω 0.47Ω - 0.91Ω 1.0Ω - 4.7Ω 5.1Ω - 1kΩ T.C.R. (×10−6/K) Dielectric Withstanding Voltage Taping & Q’ty/AMMO (pcs) T ±350 250V 2,000 Rated Ambient Temperature: +70°C Operating Temperature Range: -40°C - +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. 156 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 resistors (l-style) 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 Test Methods Limit Typical Resistance Within specified — 25°C tolerance T.C.R. Within specified T.C.R. — 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 3 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 30 30 6 3 1 ×10 RF26B2E 0.22Ω 10 6 1 ×10 100 60 60 30 30 10 6 3 3 ×20 100 Fusing time (s) 60 RF26B2E 0.22Ω Fusing time (s) 60 10 I-R Characteristics 100 Fusing time (s) Fusing time (s) 100 ×20 ×40 ×30 ×50 ×40 Magnification to PowerMagnification Rating to Power Rating ×50 ×10 RF26B2E 10Ω 10 6 3 1 ×30 RF26B2E 10Ω 1 ×20 ×10 ×30 ×20 ×40 ×30 ×50 ×40 ×50 Magnification to PowerMagnification Rating to Power Rating Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/14/09 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 157 resistors RF26