Models PWR220-2FB, PWR221-2FB, Features and PWR220-2FA are not available TO220 or TO221 housing and not recommended for new Low inductance designs. SMD and through hole versions Models PWR220T-35, PWR221T-30, and High power rating PWR263S-35 are suggested alternatives. PWR220/PWR221 F Series Power Resistors Material Speci cations General Information Resistor .................................. Thick lm The Bourns PWR220 F Series is a TO220 style Power Resistor PWR221 F is a TO221 Substrate ......................Alumina (AL203) style Power Resistor. Manufactured using thick lm on Alumina ceramic technology, it Housing ................................Epoxy/PPS is used in applications such as power supplies, motor drives and measurements. Lead Frame .......Tinned Copper (Sn/Cu) Maximum Torque ........................ 1.0 Nm Packaging Tubes ...............................50 pcs./tube Tape & Reel** ..................500 pcs./reel **Tape & Reel is only available for Versions A and D. Electrical & Thermal Characteristics Parameter Symbol Min. Nom. Max. Unit Resistance (Version A) R 0.02 100K (Version C & D) R 0.02 15K Power Rating 70 C in Free Air Power Rating with External Heat Sink 1.50 W (Version A) 30 W (Version C & D) 50 W Tolerance 0.02 < R < 1.0 2.0 5.0 % 1.0 < R < 100K 1.0 5.0 % TCR 0.1 < R < 100.0K 100 PPM/C 0.05 < R < 0.099 300 PPM/C 0.02 < R < 0.049 600 PPM/C Thermal Resistance Rthj (Version A) 3.5 C/W (Version C & D) 2.1 C/W Stability 0.5 % Dielectric Withstanding Voltage 2 kV DC Operating Temperature T -40 +155 C J *RoHS Directive 2002/95/EC Jan 27, 2003 including Annex. Speci cations are subject to change without notice. Customers should verify actual device performance in their speci c applications. *RoHS COMPLIANTApplications Power supplies Motor drives Test and measurement Welding PWR220/PWR221 F Series Power Resistors Product Dimensions TO220 Housing: 2-Pin TO220 Casing: 2-Pin (Surface Mount) 4.0 (0.16) 1.2 10.16 10.16 (0.05) (0.4) 4.0 (0.4) 3.7 (0.16) 1.2 (0.15) (0.05) 1.4 (0.06) 12.7 14.6 15.0 17.33 (0.50) (0.57) (0.59) (0.68) 6.0 17.3 27.3 14.4 16.4 (0.24) (0.68) (1.07) (0.57) (0.65) 0.76 1.3 (0.03) (0.05) 1.85 (0.07) 0.76 (0.03) Recommended Pad Layout MEASURING POINT 11.16 5.08 0.4 (0.439) (0.2) (0.015) 12.10 TO221 Casing: 2-Pin (0.476) MM 18.33 DIMENSIONS: (0.722) (INCHES) 10.16 (0.4) 4.0 3.2 (0.16) 1.2 (0.13) 3.20 (0.05) 1.76 (0.126) (0.069) 5.08 (0.200) 3.7 18.3 28.3 (0.15) 14.4 16.4 (0.72) (1.11) How to Order (0.57) (0.65) PWR 220 - 2 F B R040 J E 1.3 Model (0.05) 1.85 0.76 PWR = Power Resistor (0.07) (0.03) Package MEASURING 220 = TO220 0.4 POINT 5.08 221 = TO221 (0.015) (0.2) Number of Pins 2 = 2 Function Typical Part Marking F = Thick Film Version A = TO221 Housing, Surface Mount, 30 W (w/Heat Sink) C = TO220 Housing/TO221 Housing, Through-Hole, 50 W (w/Heat Sink) ABSOLUTE D = TO220 Housing, Surface Mount, 50 W (w/Heat Sink) PART RESISTANCE, IDENTIFICATION PWR220-2F TOLERANCE Resistor Value for all Tolerances R500 1% <100 ohms ..... R represents decimal point (examples: 7R50 = 7.5 ohms R040 = 0.040 ohms) 0512 DATE CODE: MANUFACTURER S 100 ohms ..... First three digits are signi cant, fourth digit represents YYWW TRADEMARK number of zeros to follow (examples: 2000 = 200 ohms 2002 = 20K ohms) Absolute Tolerance J = 5 % G = 2 % F = 1 % Packaging E = Tape & Reel (Available only for Versions A and D) = Tubes Speci cations are subject to change without notice. Customers should verify actual device performance in their speci c applications.