SMD POWER RESISTORS Type 3521 Series Key Features 2 Watts at 70°C Small size to power ratio Supplied on tape Value marked on resistor Available via distribution TE Connectivity is pleased to introduce this low cost high power device, 500 volt suitable for auto placement in volume, and for most applications, including maximum high frequency operations, owing to the short lead structure. It is overload attractively priced and available on 7" reels of 4000 pieces. 250 volt Characteristics – Electrical working voltage Power rating at 70°C 2W Max RCWV* 250V Terminal finish Max overload voltage 500V matte Sn over Resistance Tolerance 1% Ni Resistance range 1R0 - 1M0 Temperature Coefficient <10R ±200PPM 10R – 1M0 ±100PPM >1M0 ±200PPM Temperature range -55°C ~ +155°C Ambient temperature 70°C * Rated continuous working voltage (RCWV) shall be determined from RCWV = Rated Power x Resistance Value, or Maximum RCWV listed above, whichever is less **Recommended Circuit Board Design - If this device is anticipated to run at full continuous power then action to improve the cooling should be taken. This can be a metal substrate, copper pad left under the chip, an opening in the PCB or enlarged silver conductor pads each end. 9-1773463-5 CIS WR 01/2016 Dimensions in Dimensions Shown for For Email, phone or live chat, millimetres unless reference purposes only. go to: www.te.com/help otherwise specified Specifications subject to change

SMD POWER RESISTORS Power derating curve For resistors operated in ambient temperatures above 70°C, power rating must be derated in accordance with this curve. Dimensions L ± 0.10 W ± 0.15 t ± 0.10 a ± 0.25 b ± 0.20 6.35 3.20 0.55 0.60 0.50 9-1773463-5 CIS WR 01/2016 Dimensions in Dimensions Shown for For Email, phone or live chat, millimetres unless reference purposes only. go to: www.te.com/help otherwise specified Specifications subject to change

SMD POWER RESISTORS Marking: Marking for E-96 series in 2512 size: 4 digit marking First three digits are significant figures of resistance and the fourth digit represents the number of following zeros *For ohmic values below 100 Ω, letter"R" is for decimal point. Recommended PCB layout A B C 3.70 2.45 2.70 4 layers PCB specification: 1) Outside 2 layers (Top and Bottom) with copper foil thickness at 2oz. 2) Inside 2 layers (Middle layers) with copper foil thickness at 4 oz. How To Order 3521 1K0 F T Common Part Resistance Value Tolerance Pack Style 1 ohm 1R0 1K ohm 1000 ohms 3521 1K0 F – 1% T – 4000 reel 1 Meg ohm 1000000 ohms 1M0 9-1773463-5 CIS WR 01/2016 Dimensions in Dimensions Shown for For Email, phone or live chat, mil limetres unless reference purposes only. go to: www.te.com/help otherwise specified Specifications subject to change