Series CRF VITROHM Power Wirewound Resistors, Flame retardant, safety version UL Recognized (UL 1412, fusing and temp. limited resistors, file E 330640) Specifications Type Nominal Power rating P40 P70 W Resistance range CRF 253-8 CRF 254-8 CRF 256-8 2,2 2,0 3,0 2,5 4,0 3,5 See Page 2 E-Series Tolerances Temperature coefficient E24 % 1 , 2 , 5 10 -6 * K -1 120 50 Max. working voltage V RMS Insulation voltage (1min.) V RMS max 75 V Insulation resistance not insulated Derating linear C 70...350 (0W) Climatic category 55/350/56 Temperature range C Thermal resistance KW-1 -55 ... 350 85 65 65 Failure Rate (Total, 0 , max, 60% cont. lev.) 10 -9 h-1 Endurance (P70 , 70C, 1000h) [R/R] % 5,0 average Damp heat, steady state (40C, 93% r.h., 56d) [R/R] % 5,0 Climatic sequence [R/R] % 2,0 Terminal strength [R/R] % 0,2 Terminal Tensile Strength N 50 Resistance to soldering heat (260C, 10s) [R/R] % 0,5 s 2,5 Flowtime; solderglobule test, IEC 60068-2-20 Solderability Marking appr. 10 depends on value Printed in clear Revision 200910 VITROHM PORTUGUESA, Lda. - Est. Nacional 249-4, Trajouce - 2765-653 S. Domingos de Rana - PORTUGAL Tel:+ 351 214 457 700 - Fax:351 214 457 755 - Germany Sales Tel:+ 0049 4121 870 103 - e-mail:vitrohm.support@yageo.com - www.vitrohm.com Series CRF VITROHM Type CRF253-8 CRF254-8 CRF256-8 CRF253-8 CRF254-8 CRF256-8 UL - Voltage rating 230 V 230 V 230 V 120 V 120 V 120 V Resistance range 10R ... 330R 10R ... 330R 10R ... 330R 10R ... 90R 10R ... 90R 10R ... 90R Note: Resistors are designed to fuse safety when mains-voltage is applied. In accordance with UL-testing fusing-characteristics are as shown below F u s in g t im e .( s e g ) 1000 100 253-8 254-8 256-8 10 1 35 40 45 50 55 60 65 75 80 85 90 L max Dimensions in mm : 2 6 1 70 25x 8 10R 5% 25x 8 10R 5% 25x 8 10R 5% 95 100 105 110 115 120 125Pow.(W) S0.5 30 D 25 d 20 Lackhosen Coating residues 2 6 1 C 1 L max 14,5 12,5 17,0 Type CRF253-8 CRF254-8 CRF256-8 *R <10R Dmax. +1 D* max 4,5 6,0 6,0 d 0,65 0,80 0,80 Packaging: Type CRF253-8 CRF254-8 CRF256-8 Ordering example: CRF254-8 Type Packaging Taped/Ammopack Taped/Ammopack Taped/Ammopack 5 Tolerance Pieces 1000 1000 1000 T Pack-Code Pack.-code T T T C 85 85 85 s 10 10 10 15R R- value Revision 200910 VITROHM PORTUGUESA, Lda. - Est. Nacional 249-4, Trajouce - 2765-653 S. Domingos de Rana - PORTUGAL Tel:+ 351 214 457 700 - Fax:351 214 457 755 - Germany Sales Tel:+ 0049 4121 870 103 - e-mail:vitrohm.support@yageo.com - www.vitrohm.com