resistors RF25CC coat-insulated fusing resistors (constant current fusing type) features •Fuse within 60 seconds in case of over-current •Constant current fusing type •Fuse at low magnification at 5 times or 10 times of power rating •Flame-retardant coating equivalent to UL94 V-0 •Marking: Blue body color, fifth color band green for identification with color code marking •Products meet EU RoHS requirements EU dimensions and construction L Trimming Line Resistive Film l Type L .248±.020 RF25CC (6.3±0.5) ød Dimensions inches (mm) C Max. D d (Nominal) ℓ* .280 .091±.012 .024 1.18±.118 (7.1) (2.3±0.3) (0.6) (30±3) * Lead length changes depending on taping and forming type. Marking Ceramic Core Electrode Lead Cap Wire Flame Retardant Insulating Coating C D ordering information RF 25 C C T52 A R68 K Product Code Power Rating Terminal Surface Material Constant Current Fusing Type Taping & Forming Packaging Nominal Resistance Resistance Tolerance 25: 0.25W C:SnCu 3 digits K:±10% T26, T52, VTP, VTE, L10A, M10X A: Ammo R: Reel applications and ratings Power Rating Resistance Range(Ω) (E-24) Resistance Tolerance 0.25W 0.1 - 0.91 K: ±10% Taping & Q’ty/AMMO Dielectric (pcs) Withstanding Voltage Fusing Time T26A T52A Fusing Characteristics Fusing Power 2.5W 0.1Ω 1.25W 0.11Ω - 0.91Ω 60 sec Max. 250V 2,000 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. 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 resistors (constant current fusing type) 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 Test Items ∆R± (% +0.05Ω) Test Methods Limit Typical Resistance Within specified tolerance — 25°C Resistance to Soldering Heat Humidity 5% 2.5% 350°C ± 10°C, 3.5s ± 0.5s or 260°C ± 5°C, 10s ± 1s 5% 2.5% 40°C ± 2°C, 90% - 95%RH, 1000h No Load 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. 70°C±2°C, 1000h 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 respectively 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 dis-connection occurs. Fusing Characteristics Fusing time RF25CC 0.68ΩK 6 6 Current (A) 30 10 6 MAX. 3s Current (A) RF25CC 0.68ΩK Fusing Time (S) Fusing Time (S) 6 8 8 60 60 10 10 100 100 30 I-R Characteristics 10 4 1.0 (0.68W) 1.0 1.3 1.5 1.3 1.5 2.0 Fusing Fusing current (A) current (A) (0.68W) (1.53W) (1.15W) (1.53W) (1.15W) (2.72W) 2.0 MAX. 60s (2.72W) 0.1 MAX. 3s 4 2 2 3 3 Fusing time 0.1 0.2 MAX. 60s 0.2 0.4 0.4 0.68 0.68 Resistance (Ω) Resistance (Ω) 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 RF25CC